TGR Website Search Bar

The Trinity Glen Rose Groundwater Conservation District conserves and protects the Trinity Aquifer in Northern Bexar County, Texas. If you need to meet with TGR District staff, please call to make an appointment so you can connect with the appropriate staff person. TGR Mission The TGR was created in 2001 to conserve, preserve, and protect the Trinity Aquifer within the District. CONSERVE - PROTECT - PRESERVE Drought Dashboard South Texas Drought Conditions With the severity of the current drought condition continuing into 2026, the TGR District will be providing up to date information about these conditions are affecting our local aquifers and how you can help. The map to the right is published each week by the U.S. Drought Monitor. As you can see, Bexar County is now mostly in D1-Moderate Drought after having been in D3-Extreme Drought over the last couple of years. The rainfall chart from the National Weather Service shows that rainfall for the San Antonio area is running slightly above average for this time of year. While the heavy rainfall amounts over the July 4th weekend have helped the Bexar County area significantly, the Trinity Glen Rose District is still in Stage 3 of its Drought Management Plan. Local Rainfall Amounts - June Bexar County Map Date: Thursday, June 2 , 2026 None D0 (Abnormally Dry) D1 (Moderate Drought) D2 (Severe Drought) D3 (Extreme Drought) D4 (Exceptional Drought) Click the state map to view Texas Drought Monitor page. Click the chart to view the National Weather Service rainfall report. Drought in the News Texas Water Development Board Weather Report Drought.gov - Online info from National Integrated Drought information System Express-News - April-08-25 - Great overview of current drought Texas Water Newsroom - TWDB Texas Tribune on Water Supply How You Can Help - Click Here QUICK LINKS TGR moves to STAGE 3 Watering Restrictions of Drought Plan Board Meeting Info GMA-9 Meeting Information Current Newsletter TGR STATISTICS 302,274 POPULATION 8,689 (Acre Feet) 2025 PRODUCTION 5 DISTRICT PRECINCTS 3 (Drought Stage 3 ) DROUGHT STAGE Conserving Water for Future Generations

Take advantage of the Trinity Glen Rose District's conservation program incentives. DROUGHT INFORMATION TGR Board Adopts New Drought and Conservation Management Plan The Trinity Glen Rose District Board adopted amendments to its Drought and Conservation Management Plan at its October 2024 board meeting. Click the link below to download and view the plan. TGR Drought and Conservation Management Plan Managing Drought PDF TGR District Moves to Drought Stage 3 Current Drought Stage: Stage 3 as of November 1, 2024 With water well levels already near historic lows and fall rainfall deficits at around five inches, the Trinity Glen Rose Groundwater Conservation District (TGR) declared STAGE 3 water restrictions in compliance with the District’s Drought Contingency Plan effective as of Friday, November 1. “We are seeing very negative trends in our Trinity Aquifer monitoring water well levels continue. Additionally, we’re seeing that same type of problem with the Edwards Aquifer,” said TGR General Manager Amanda Maloukis. “So as the Edwards Aquifer Authority is considering for the first time ever declaring Stage 5 of their drought plan, we know that it is critical for us to declare Stage 3 of our drought plan. These two drought stages are the highest levels of required conservation measures and they’re being invoked due to our persistent drought which has prevented water wells from replenishing to get us back to somewhat normal water levels.” Since September 1, San Antonio has recorded a little less than 1.5 inches of rain. That’s 5 inches below average for the first eight weeks of fall. This is also the driest start to fall since 2008 which was also one of the area’s toughest droughts. As of now, it has been two months since any rain has fallen in San Antonio. Given those very dry conditions, the current US Drought Monitor lists the majority of Bexar County as being in (D3)-Extreme Drought . “How can people help our aquifers? First of all, the growing season has stopped, so there should absolutely be no lawn watering happening,” Maloukis stated in her call to action. “Even though our Stage 3 irrigation measures limit watering to once every other two weeks, that restriction is really written for summer months when landscapes do need a little water to stay alive. So, please, turn off all sprinkler systems and hand water only where and when necessary. Then, we would ask families to talk about conserving water. We can save a lot of water by taking short showers, washing only full loads of clothes and dishes and never just letting a faucet run. You must have an active purpose for using water to turn the faucet on.” Maloukis concluded by reminding people that droughts are a part of living in South Texas. And, at some point, those droughts end with plentiful rainfall. But, until that much needed precipitation returns, it is up to every family and business operation to take these water conserving measures seriously. The conservation measures outlined and strongly encouraged under TGR’s Stage 3 drought plan include all conservation measures from Stage’s 1 and 2 unless replaced by Stage 3: Watering with an irrigation system, sprinkler, or soaker hose is allowed once every other week, from 5- 10 a.m. and 9-12 p.m. on your designated watering day as determined by your address. Watering with drip irrigation may run one day a week, on Friday, from 5-10 a.m. or 9-12 p.m. Watering with a hand-held hose may occur any time and any day. Water use reduction goal of 15%. Installing newly planted landscapes is highly discouraged. Aesthetic fountains should not be utilized unless an alternative source of water other than groundwater. Do not wash parking lots, driveways or sidewalks unless health and safety is a risk. The use of a commercial car wash facility that recycles water is allowed any day. Alternate sources of water are highly encouraged such as rain water harvesting, reclaimed condensate, reclaimed grey water, recycled water, and other non-groundwater sources. Below is a chart outlining the day of the week your household is allowed to water, which is every other week during Stage 3 drought restrictions. But, as mentioned, with the landscape growing season over for 2024, there should not be any lawn watering with sprinkler systems occurring now. You can download a complete copy of TGR’s Drought Stage Plan and the District’s latest drought brochure “Managing Drought” at our website. www.trinityglenrose.com/drought-information . The TGR Conservation page has additional ways each household can help save water during these very dry weather conditions. You can find those tips at the link . Drought and Weather Resources TWDB Drought Monitor/Drought Resources Page TWDB Precipitation Stations/TEXMESONET Map Palmer Drought Severity Index Map Texas Drought Monitor Map Historical Palmer Drought Indices NOAA Precipitation Estimates Map NOAA Soil Moisture Map Texas Burn Bans Map TCEQ List of PWS's Limiting Water Use to Avoid Shortages TWDB Flood Viewer TWDB Drought Monitor Map Click on the image below for most up-to-date information. Drought map on 10-31-2024

Here you will find the latest research by the Trinity Glen Rose District in our effort to learn about the Trinity Aquifer. Watch the Go Gardening Show - Season 5 - Episode 5 Play Video Facebook Twitter Pinterest Tumblr Copy Link Link Copied The Go Gardening Show is a project that is being produced by the Trinity Glen Rose Groundwater Conservation District and Gardening Volunteers of South Texas. Go Gardening is also made possible through our co-title sponsor Edwards Aquifer Authority and San Antonio River Authority. You can now watch those Episodes on GVST's YouTube channel. Go Gardening Show - Season 5 - Episode 5 Welcome to Season 5 of the Go Gardening Show! This month, the Go Gardening crew put together a great segment on how to transform a part of your yard to a beautiful native plant bed. The example we used was our very first “Front Yard Makeover” contest winner’s home in central San Antonio. The Gardening Volunteers of South Texas, a great TGR partner, got all of the native plants, soil materials, landscape rock, project design and installation donated. Then GVST gathered its volunteers to install the new native plant bed. You’ll not only learn which plants were chosen for the project, but also get a great step-by-step tutorial in how to properly install and maintain a new native plant bed. Next, we talked to a truly amazing woman who not only has become a native plant expert, but she also raises various vegetables from around the world to gather their seeds and share with people in various countries. She was a delight to be around and we all gained a new appreciation for how this former military officer has focused her retirement years on becoming a true source of knowledge about native plants in Texas. She also shares her knowledge through seminars, community presentations and a podcast. Go Gardening's mission is to help people conserve water in the Edwards and Trinity Aquifers by teaching homeowners how to convert turfgrass areas to low-to-no water use landscapes featuring native plants.

Learn about the latest news from the Trinity Glen Rose District. TGR DISTRICT NEWS If you missed a previous issue of our newsletters, just click here to read and or download those issues. This TGR Resource newsletter was published in June, 2026 TGR Water "DFC" Proposal Moves Forward The Trinity Glen Rose Groundwater Conservation District (TGR) recently received approval of its new Groundwater Management Plan from the Texas Water Development Board (TWDB), which is the State of Texas agency that oversees water planning. Every five years, groundwater districts are required to develop a water management plan defining its groundwater needs and supplies for the following five years. There are also requirements for districts to outline goals for achieving results that match its water demand projections. “Our water management plan is a very detailed document outlining current and projected district population growth, Trinity Aquifer hydrology, current recharge numbers and recharge projections, how we advocate water conservation measures and much more,” said TGR General Manager Amanda Maloukis. “Additionally, we must show how our plans fit into regional Groundwater Management Area projections as well as the State of Texas’ 50-year water plan. So, one can only imagine the level of coordination and scientific analysis that goes into a process like this. Most importantly, we want the general public to know that this is all done to ensure water needed in the future will be there for families and businesses, and for protection of the ecosystem we live in.” The TGR Groundwater Management Plan can be a valuable document for those studying water resource planning and management. There are historical records, water demands for various parts of the region, detailed hydrological analyses and multiple tables of data related to water resource planning in the State of Texas. You can read and download the TGR plan at: www.trinityglenrose.com/reports . TGR Board Members Retain Precinct Seats General elections for the Trinity Glen Rose Groundwater Conservation District (TGR) concluded May 2, 2026. Two board members retained their positions, Steven Peterson (left) and Joe Silman (right), recently took the oath of office to represent their respective precinct constituencies for another four-year term. Board Chair Joe duMenil (center) administered the oath of office. The District is gaining a new board member, David Timmermann for Precinct 5. Additionally, the board voted on officer positions for the coming year which will include: Joe duMenil as Chair, Stuart Birnbaum as Vice Chair, Steven Peterson as Secretary, Joe Silman as Treasurer, and David Timmermann as Assistant Secretary/Treasurer. The Board is responsible for all affairs of the District, including managing the groundwater resources of the Trinity Aquifer within the District. Click here to read more about the board members and the precincts they represent. TWDB Studies Brackish Water in Hill Country Aquifers The Texas Water Development Board (TWDB) Brackish Resources Aquifer Characterization System (BRACS) Program was established in 2009 to map and characterize the brackish portions of Texas aquifers to provide useful information and data to regional water planning groups and other entities interested in using brackish groundwater as a water supply. Brackish water refers to water with a salt concentration higher than fresh water but lower than seawater. Typically, brackish salinity ranges from 0.5 to 30 parts per thousand. The exact salt concentration of brackish water depends on its location and environmental factors. Both Texas industry and public water supply planners are looking at brackish groundwater to supplement stressed freshwater resources. Brackish groundwater is a significant water supply component that can be used to meet future water demands. Groundwater desalination strategies in the 2022 State Water Plan represent additional new groundwater supply for nine of the regional planning groups. Desalination of brackish groundwater was recommended as an additional supply volume of approximately 19,000 acre-feet per year in 2020, with an additional 157,000 acre-feet per year of brackish groundwater recommended to be in service by 2070. The Hill Country’s Trinity Aquifer is the southern portion of the larger Trinity Aquifer system, one of Texas’ nine major aquifers. It extends across roughly 15,500 square miles of Central Texas, spanning 24 counties from the Hill Country to the Gulf Coastal Plain. Composed of layered Cretaceous-age limestone, sandstone, and shale of the Trinity Group, the aquifer thickens southeastward and is heavily faulted by the Balcones and Luling Fault Zones, which influence groundwater flow and salinity. The aquifer includes six primary water-bearing units divided into 3 hydrologic units: the Upper Trinity, Middle Trinity, and Lower Trinity. You can find more information about TWDB Hill Country brackish water study toward the bottom of the TGR Aquifer Science website page: www.trinityglenrose.com/aquifer-education . You can also review the TWDB story with more maps here. Texas' Largest Groundwater Conference Happening in September Registration is open for the 15th Annual Texas Groundwater Summit. This is the premier event of the year for groundwater professionals across Texas. Over three days, the Summit brings together experts and stakeholders from across the state to explore emerging trends, share new research, and discuss the most pressing groundwater issues facing Texas. The Texas Groundwater Summit is the largest conference of its kind in Texas. If you are a groundwater professional, groundwater stakeholder, or interested in the future of groundwater in Texas, you should plan to be there. Attendees can expect: Timely policy discussions following a historic legislative session and leading into what might be another water-focused legislative session Opportunities to learn how groundwater is managed in Texas and the role of groundwater conservation districts Technical sessions highlighting groundwater science, modeling, and research Updates on district-led research and science-based initiatives Ample networking opportunities with over 550 participants, including GCD board and staff members, engineers, attorneys, elected officials, and other groundwater stakeholders You can register for the conference here. Forecasters Predicting the Strongest El Niño in 140 Years Could Hit Texas This Year What Does it Mean? After a fairly warm and dry winter, a “Super El Niño” could be bringing a strong rainy season later in 2026 to Texas. Depending on how warm ocean surfaces stay this fall in the Northern Hemisphere, forecasters think the rainfall could be record breaking. A “super” event happens when temperatures climb more than 4 degrees above normal. These rare events have only happened a few times in history and often bring noticeable changes around the world. The Southwest has been under drought conditions for almost six years, and all water planners have stated that it would take sustained rain over months to reverse the lasting impacts of this drought which has reduced the Edwards Aquifer and Trinity Aquifer to near record lows over the past year. What’s often not realized is that quick rounds of heavy rainfall are not enough to replenish these aquifers. It takes continued rainfall over many weeks to allow the large amounts of water to actually seep into aquifers and steadily replenish aquifers over time. A large pool of warm water below the ocean surface is now rising and spreading. This shift is a key step in forming a powerful El Niño event. When the extra heat stored in the ocean is released into the atmosphere, it can influence weather patterns far beyond the Pacific. That is why scientists pay close attention to these changes. Recent weather updates from the European Centre for Medium-Range Weather Forecasts show a stronger signal than first predicted for 2026, and confidence has grown that warming will continue through 2026. While this strong El Niño is slated to develop in May, it’s largest impacts will likely come later in the year. Currently, the National Weather Service says there is a 62% chance of the Super El Niño development. You can read more about this potential shake up in our weather patterns this year at this link. GARDENING GO Check out what’s happening in this edition of your favorite landscape show - Go Gardening! Go Gardening Season Five Now Online Go Gardening is now in its fifth season! Let’s take a look at what’s showing now. In June, the Go Gardening crew put together a great segment on how to transform a part of your yard to a beautiful native plant bed. The example we used was our very first “Front Yard Makeover” contest winner’s home in central San Antonio. The Gardening Volunteers of South Texas, a great TGR partner, got all of the native plants, soil materials, landscape rock, project design and installation donated. Then GVST gathered its volunteers to install the new native plant bed. You’ll not only learn which plants were chosen for the project, but also get a great step-by-step tutorial in how to properly install and maintain a new native plant bed. Next, we talked to a truly amazing woman who not only has become a native plant expert, but she also raises various vegetables from around the world to gather their seeds and share with people in various countries. She was a delight to be around and we all gained a new appreciation for how this former military officer has focused her retirement years on becoming a true source of knowledge about native plants in Texas. She also shares her knowledge through seminars, community presentations and a podcast. Click here to watch the latest Go Gardening Show. You can watch previous Go Gardening shows at: https://www.youtube.com/@gardeningvolunteersofsouth5703/videos. Native Landscape Guide Available to Download As the Hill Country, which includes parts of Northern Bexar County, continues to grow, so does the need to change the mindset of how landscapes should look for Hill Country homes. While there are many great resources, including the Trinity Glen Rose District’s own Go Gardening Show, we think this particular landscape guide provides a concise strategy for installing a beautiful native plant landscape. The Hill Country Alliance partnered with the San Antonio Water System, Native Plant Society of Texas, and Native American Seed and developed “Native Landscaping Templates for the Hill Country” to help homeowners transform their lawns into native, water-wise landscapes. These well-designed templates offer simple, scalable examples that show the common principles for helping residential landscaping shift away from water-hungry turf lawns towards drought-tolerant native landscaping. Great Water Conservation Tip - If you are thinking about converting your lawn to a native landscape, it may be a good time to rethink your irrigation system. If you are using native plants and planting them at the right time of year, you may be able to do away entirely with in-ground irrigation. The savings can be great for both your water use and your bill. Get the HCA Guide Here . The Hill Country Alliance and Native Plant Society will be holding a webinar on June 16 to go through this landscape guide. You can learn more about the webinar and register at this link . TGR's Drought Tolerant Plant Picks Having a water-saving garden doesn’t mean you have to sacrifice color and even year round color in your landscape. Once the temperatures cool, any of the native perennials can go in the ground for next year’s show. Here are two great suggestions. Inland sea oats, Chasmanthium latifolium , perfect for shady areas that needs some interest and movement! Inland sea oats are a clumping perennial grass reaching 2’ to 4’ in height. Particularly beautiful when planted en masse and during the fall when the oat-like seed heads mature. Inland sea oats are deer-resistant, but the seeds and leaves provide a wildlife benefit to birds and small mammals. Woolly ironweed, Vernonia lindheimeri, , another beauty to add interesting texture in the landscape, woolly ironweed is a perennial pollinator favorite. It will need a very well-draining, sunny spot. Ironweed is deer-resistant and can grow upwards of 2’ in height and topped with deep pink to purple flowers that bloom from spring through the summer and into fall. DROUGHT DASHBOARD With drought conditions easing just a bit in early 2026, the TGR District is providing up to date information about these conditions affecting local aquifers and how you can help. At the TGR Drought Dashboard on the District’s website home page, you will find the current U.S. drought monitor map, the rainfall chart from the National Weather Service, current drought news articles and a link to some great water conservation recommendations at our Don’t Waste the Wet Stuff page. Click here to go to the latest TGR Drought Dashboard. DID YOU KNOW? TGR That’s a lot of water to waste… As much as 60% of irrigation water can be wasted due to common sprinkler system issues like leaks, broken sprinkler heads, and poor scheduling A single broken sprinkler head can waste up to 25,000 gallons per year. Now is a great time to have your sprinkler system inspected to make sure it runs efficiently this summer. Don’t Waste the Wet Stuff! BRIEFS NEWS TGR 2025 Annual Report - The TGR District recently published its approved 2025 Annual Report. In the report you’ll find how the District performed against its management plan goals, an update of the growth of District operations, and a rundown on how District staff and board members interacted with the community regarding new policies, water conservation opportunities and programs for protecting the water quality in the Trinity Aquifer. Click here to read and download a copy of the TGR 2025 Annual Report. The Trinity Glen Rose District has greatly enhanced its website’s ADA capacity . We have applied a detailed compliance app to the website and added an accessibility widget (upper right corner) which gives the user many options to enhance font size, color saturation, contrast, text spacing and much more. Unique Water Project in Texas - People are usually curious about how desalination of salt water from the ocean plays into water planning efforts for cities, states and countries. One interesting desalination pilot project is in operation in Texas’ Rio Grande Valley. The Laguna Madre Water District provides water to South Padre, Port Isabel, Laguna Heights, Laguna Vista and Long Island Village. While it does get some source water from the Rio Grande River, it is ramping up its efforts to develop a robust seawater desalination program. You can watch an interesting video about the project here. TWDB Water Dashboard - Water Data at your Fingertips - In addition to water itself, the water industry is powered by data. Water utility operators rely on real-time information about water quality and system demand; water resource engineers analyze data to make decisions about designing infrastructure; and hydrologists and other scientists analyze everything from streamflow to meteorological data. You can view all types of water data regarding the State of Texas at Texas Water Development Board’s Water Data for Texas website. Click here to take a look around. Well Owner Fact Sheets and Publications - Do you own and operate a water well? If so, you know there is a little bit of work that goes into maintaining that well each year. The Texas Well Owner Network provides some great informational materials to help you through the process. Click here to read more. TGR District Email Address We are in the process of updating our IT system which will include a new email for the office. That new email address is: office@TGRGCD.org . Call to Set Appointments with TGR District Staff If you need to meet with the TGR District staff, we ask that you call to make an appointment so we can make sure you connect with the appropriate person who can answer questions and/or resolve problems. Call us at (210) 698-1155. Download this quarter's TGR Resource Newsletter here.

The Trinity Glen Rose District partners with many great entities to teach water conservation and pollution prevention. Pollution Prevention - See Park Slide Shows Below Practicing Pollution Prevention Each Day Over the next few months, the Trinity Glen Rose Groundwater Conservation District is going to be featuring some of the beautiful parks that are located within the District’s boundaries. The bottom line is that parks, water and pollution prevention go hand-in-hand. So, the more you know about how those three work together, the more likely you’ll be to help prevent pollution from getting into our local rivers and aquifers. So that’s why we’re calling this series “Learn and Live.” Each month, we will inform you about one of the must-see parks in Northern Bexar County. And with that learning, we hope you will not only want to visit that park, but you’ll also want live your life by developing the best pollution prevention habits that researchers have developed so far. Learning About Pollution Prevention Historically, cities have paved roadways, sidewalks, trails, parking lots, sports courts, alleys, driveways, and other surfaces to reduce the annoyance and cost of slippery mud and blowing dust. Unfortunately, having so many hard, water-repelling surfaces (along with a vast number of urban rooftops) can be environmentally harmful. After it rains, vast amounts of water, now called “stormwater,” will collect in these areas, pick up the grease, grime and other pollutants that are deposited on them each day, and then head for a water source like a creek, river or aquifer. Here are some of the ways dirty stormwater can pollute a water supply: most stormwater runoff escapes natural cleansing by plants, rocks and soil; without nature slowing down the stream of water after a rain, higher amounts of water are funneled to local streams; urban streams become prone to flash flooding from rapid runoff, resulting in severe scouring, erosion, and reduction of plant life; once stream beds are scoured, flooding becomes more common. The solution is to hold back the water where it hits, slow it down so that the destructiveness of erosion and contaminants is controlled, and that it is naturally cleaned it before it reaches a waterway or aquifer recharge feature. So, now that you’ve learned how unabated stormwater can create flooding and pollution issues for our aquifers and streams, you can also understand why maintaining and increasing large natural areas like parks is so important to our community. The important point to never forget is that the less runoff, and the slower the runoff we have, the less damage there is to rivers and aquifers and the overall environment. Living Pollution Prevention Here are the Top 6 Pollution Prevention Habits You Should Develop Practice water conservation in your home each day. The less water you use, the more water is left in the Trinity Aquifer for future use. Practice energy conservation in your home each day. Large amounts of water are needed to cool power plants that provide electricity to our city. Less energy production requires less water to be used. Use non-toxic cleaning chemicals in your home. Never dump oil or others types of solvents on the ground or in the street where they can run off into a stream or an aquifer. Use only environmentally-safe weed-killers and fertilizers on your landscapes. Always pick up your pet's waste and dispose of properly. Pet waste that runs off into a creek or stream only increases the bacteria levels in that body of water. Enjoy the parks and advocate for more green spaces in your communities. “Learn and Live” at Stone Oak Park 3V3A0300 IMG_6942 3 3V3A0119 3V3A0300 1/28 Numerous natural areas and community parks beautify Northern Bexar County where the Trinity Glen Rose Groundwater Conservation District (TGR) works to preserve and protect the Trinity Aquifer each day. In addition to these parks’ aesthetic value, they also play a major part in preventing pollution from entering the Trinity Aquifer and Edwards Aquifer which are both critical to the water supply in Bexar County. To highlight pollution prevention message, TGR is bringing its constituents an informative series about the six major parks and natural areas in the district. This month, we are highlighting Stone Oak Park located at 20395 Stone Oak Parkway. Stone Oak Park features a 3.2-mile loop trail located in the heart of the Stone Oak neighborhood. Despite its urban setting, park designers succeeded at creating a very rustic feel as the trails wind through some traditional South Texas hill country scenery. Currently, there are some beautiful wild flowers dotting the trails, and with the recent rains, the park is quite green. The park also contains some interesting sculpture art and some work out stations (push ups, site ups, pull ups) for those looking for an additional level of exercise. The trails are rated as moderate, and dogs are also welcome but owners must be keep them on leash. “Learn and Live” at Panther Springs Park Panther Springs Park Panther Springs Park Panther Springs Park Panther Springs Park 1/21 Panther Springs Loop is a 3.6-mile lightly trafficked loop trail located near San Antonio, Texas that features beautiful wild flowers in the spring, hill country type wooded areas and many beautiful open meadow-like vistas. The trails are paved and considered good for all skill levels of hikers, walkers and runners. The park, which opened in March of 2015, consists of 279 acres which were donated by Dan Parman and the San Antonio River Authority (SARA). The dog park which is located near the entrance of the park includes areas for larger dogs and one for smaller ones. Bird watchers have documented 46 different species in the park to include the Greater Roadrunner, two species of hawks and numerous other types of smaller, colorful birds. The San Antonio River Authority collaborated with the City of San Antonio in the development of Panther Springs. SARA’s portion of the project included design and construction work to improve the water and sediment conveyance in the existing natural channel. The agency continues to monitor the stream for changing conditions as the landscape slowly changes over time. Preserving the community’s natural areas goes a long way toward helping efforts to maintain excellent water quality in local aquifers and other waterways. That is why the Trinity Glen Rose District is urging you to learn about the parks and to live a little by visiting each one to experience the environmental beauty and ecological benefits they provide. “Learn and Live” at Friedrich Wilderness Park Windmill along Water Trail woods 1 bridge 1 Windmill along Water Trail 1/23 Numerous natural areas and community parks beautify Northern Bexar County where the Trinity Glen Rose Groundwater Conservation District (TGR) works to preserve and protect the Trinity Aquifer each day. In addition to these parks’ aesthetic value, they also play a major part in preventing pollution from entering the Trinity Aquifer and Edwards Aquifer which are both critical to the water supply in Bexar County. To highlight pollution prevention message, TGR is bringing its constituents an informative series about the six major parks and natural areas in the district. This month, we are highlighting Friedrich Park located north of Loop 1604 on Milsa Drive. Friedrich Wilderness Park offers approximately 10 miles of hiking trails with varying degrees of difficulty. It is home for rare birds, terrestrial orchids, steep hills and deep canyons. It is internationally known for bird watching. Perched on the edge of the Balcones Escarpment, Friedrich is a nesting site for the endangered Black-capped Vireo and the Golden-cheeked Warbler. In 1971, Norma Friedrich Ward bequeathed 180 acres of land on Heuermann Road near Leon Springs to the City of San Antonio for use as a public park. She also gave $100,000 to make improvements to the land. It was Mrs. Ward’s wish that the natural vegetation and native trees and shrubs be protected and that native birds and wildlife be protected and encouraged to use the park as a sanctuary. The following year, Wilbur Matthews and Glen Martin donated another 52 acres to enlarge the park according to the same guidelines specified by Mrs. Ward. The park was developed with a grant from the Texas Parks and Wildlife Department and was dedicated on August 31, 1978. Preserving the community’s natural areas goes a long way toward helping efforts to maintain excellent water quality in local aquifers and other waterways. That is why the Trinity Glen Rose District is urging you to learn about the parks and to live a little by visiting each one to experience the environmental beauty and ecological benefits they provide. For reservations and more information about the Friedrich Wilderness Park, you can visit the park’s website here . Come “Learn and Live” at Eisenhower Park Eisenhower old fence Eisenhower Park Sign Eisenhower Sunset 2 Eisenhower old fence 1/20 Numerous natural areas and community parks beautify Northern Bexar County where the Trinity Glen Rose Groundwater Conservation District (TGR) works to preserve and protect the Trinity Aquifer each day. In addition to these parks’ aesthetic value, they also play a major part in preventing pollution from entering the Trinity Aquifer and Edwards Aquifer which are both critical to the water supply in Bexar County. To highlight pollution prevention message, TGR is bringing its constituents an informative series about the six major parks and natural areas in the district. This month, we are highlighting Eisenhower Park located north of Loop 1604 on NW Military Highway. Dwight D. Eisenhower Park is a 320-acre park managed by the City of San Antonio containing excellent examples of Hill Country landscapes, including wooded dry creek beds and rocky canyons. The park features more than 6 miles of paved and unpaved trails. There are seven different trails in the park most of which are paved. The 2.5 mile Hillview Trail circles the perimeter of the park and leads to the observation tower located about midway through the hike. The one-mile Cedar Flats Trail runs through the heart of the park and contains a combination of paved and rugged terrain. All of the trails have plenty of signage posted and many of the plants and flowers you will see are marked as well. Eisenhower Park is pet friendly, but is a designated natural area park which means roller blades, skateboards and bikes are not allowed on the trails. There are several pavilions in the park for barbecues and picnics that are located near the entrance of the park. Various park amenities are available for rental and you can learn how to make a reservation at this link. The City of San Antonio also offers various types of classes in the parks and you can learn about them at this link. Preserving the community’s natural areas goes a long way toward helping efforts to maintain excellent water quality in local aquifers and other waterways. That is why the Trinity Glen Rose District is urging you to learn about the parks and to live a little by visiting each one to experience the environmental beauty and ecological benefits they provide. You can learn more about Eisenhower Park here. Government Canyon State Natural Area Government Canyon Cover 3V3A6961 3V3A7100 Government Canyon Cover 1/31 Government Canyon State Natural Area is part of the Texas State Parks system. It is designated a natural area rather than a state park because its primary focus is protection of the property's natural resources. Given that designation, access and recreational activities may be restricted if the Texas Parks & Wildlife Department (TPWD) deems such action necessary to protect the environment there. The reserve is located in northwestern Bexar County inside the Trinity Glen Rose Groundwater Conservation District’s boundaries. It protects a large, relatively pristine tract of Hill Country terrain that is home to numerous and diverse species of plants & wildlife and the upper Culebra Creek and Leon Creek watersheds. The approximately 12,000 acres of land Government Canyon State Natural Area occupies was originally purchased to protect the critical aquifer recharge zone which diverts rainfall into the Edwards Aquifer, the main source of drinking water for San Antonio. First opened to the public in October, 2005, Government Canyon State Natural Area offers more than 41 miles of trails. Visitors can camp, attend a program or guided hike, geocache, picnic, take nature photos and look for birds and other wildlife. For those looking for a place to go birding, Government Canyon is a good place to find the endangered Golden-cheeked warbler. One of the most visited features on the property are the dinosaur tracks which are located about 2.5 miles from the visitor’s center. Scientists believe the tracks were made about 110 million years ago. At that time, this location was actually near the shoreline of the Gulf of Mexico. The dinosaurs would walk along the moist, fine-grained mud and leave tracks which would then be exposed to the sun allowing them to dry and harden. Erosion over time have exposed the tracks for today’s people to discover, study and protect. The Witte Museum, University of Texas at San Antonio, Trinity University and Texas Parks and Wildlife are continuing to study and preserve these unique dinosaur tracks today. You can learn more about Government Canyon here. Crownridge Canyon Park Entrance Crownridge Canyon Map 3V3A6275 Entrance 1/15 Crownridge Canyon was the first City natural area developed as part of the Edwards Aquifer Protection ballot initiative. The 200-acre preserve features Level 1 ADA trails and Level 4 hiking trails through a variety of habitats. Features include a canopy level bridge overlook, beautiful forested canyon bottoms, hillside vistas, and restored grasslands. There are excellent opportunities to view the endangered Golden Cheeked Warbler during its nesting season. This park features interpretive elements highlighting local flora, fauna, geology and the aquifer recharge cycle, as well as the area’s early human inhabitants. The landscape at Crownridge feature native plants of northern Bexar county. Many are numbered and can be identified using the Natural Areas Plant Key. Crownridge Canyon Trails offer both gentle Level 1 trail surfaces and more natural and challenging Level 4 surfaces. Trail markers will soon be placed along the trails to identify native plants. Red Oak Trail: Red Oak is the lower trail loop leading to the bridge crossing Red Oak Canyon. It has a 1.3 mile stabilized base surface meeting ADA accessibility requirements. Level 1 . Bear Grass Trail: Bear Grass Trail is a natural surface, .6 mile loop in the upper part of the park. This trail is Level 4 and offers medium difficulty with few steep slopes and rocky ledges. Level 4. Pets, alcohol, bikes, and loud music are not allowed. Location: 7222 Luskey Blvd. 78256 Hours: Sunday-Saturday: 7:30 a.m. – sunset

Here you will find the latest research by the Trinity Glen Rose District in our effort to learn about the Trinity Aquifer. GMA 9 Board Meeting Date: 10:00 am, September 29, 2026 in Boerne at the Cow Creek GCD GMA-9 Website ( Find more info at the GMA 9 website provided) Proposed DFCs - 2026 *The GMA 9 adopted proposed Desired Future Conditions (DFC) on March 31, 2026. A 90-day public comment period is open through Monday, July 20, 2026. The District will hold a public hearing on the proposed DFCs relevant to the District for public comment July 16, 2026. Comments may also be submitted to the District during the 90-day public comment period at any time. Current planning documents and supporting material are available on the GMA 9 website under CURRENT PLANNING DOCUMENTS . Current documents and supporting material are also available in the District office. Groundwater Management Area 9 Groundwater Management Area 9 (GMA-9) was established in 2002 and includes all or part of 9 counties in the Texas Hill Country. The Texas Water Development Board created 16 Groundwater Management Areas across Texas, each with a number of groundwater conservation districts (GCDs) included in their boundaries. GMA-9 member districts meet at least annually to conduct joint planning with the other districts in the management area and to review the management plans, the accomplishments of the management area, and proposals to adopt new or amend existing desired future conditions. The GMA 9 Committee consists of 9 GCDs, each with its own designated representatives serving as a voting member. You can obtain all GMA-9 planning, meetings and news at: www.GMA9.org. GMA-9 MEMBERS District Designated Representatives Cow Creek Groundwater Conservation District, Chair, Micah Voulgaris, Trinity Glen Rose Groundwater Conservation District, Vice Chair, Amanda Maloukis Bandera County River Authority and Groundwater District, Secretary, Hayli Hernandez, Designated Representative - David Mauk Blanco-Pedernales Groundwater Conservation District, Erik Kubinski Comal Trinity Groundwater Conservation District, Carl Haack Hays Trinity Groundwater Conservation District, Laura Thomas Headwaters Groundwater Conservation District, Monica Thibodeaux Medina County Groundwater Conservation District, David Caldwell Southwestern Travis County Groundwater Conservation District, Lane Cockrell Alternative Representatives: Bandera County River Authority and Groundwater District, Hayli Hernandez Texas Water Development Board link to Groundwater Management Area 9.

The Trinity Glen Rose District partners with many great entities to teach water conservation and pollution prevention. TGR EVENTS 2021 Watersaver Landscape Tour Videos The Trinity Glen Rose District cosponsored the 2021 Watersaver Landscape Tour. This event was held online and more than 350 people took time to watch. In case you missed it, you can watch the tour videos featuring some beautiful, water-saving landscapes from around San Antonio. We'd like for you to come away with a few ideas on how you can improve the look and feel of your yard while substituting native plants for grass and other nonnative plants that require lots of water to keep healthy. Many thanks are due to the homeowners who agreed to not only let us show their yards but also participate in the videos. They are quite informative. One last item...you can download the plant lists we put together for each yard, which should help you next time you visit a nursery to pick the right plants for your home's landscape. We hope you enjoy these videos as much as we did in putting them together. Download the plant list here. 2019 Watersaver Landscape Tour - Photos Trinity Joe 3V3A8317 Trinity 1/32 The Trinity Glen Rose District cosponsored the 2019 Watersaver Landscape Tour. This tour offered residents the opportunity to visit various landscapes in various parts of the city to see how they can improve the look of their yards while saving water. Click the arrows to view the photos.

Here you will find the latest research by the Trinity Glen Rose District in our effort to learn about the Trinity Aquifer. TGR Board Adopts Changes to Precinct Boundaries Redistricting is part of the election process in the United States. And because the Trinity Glen Rose Groundwater Conservation District’s (TGR) board members are elected, the district recently reviewed its population changes over the past 10-year period and found it needed to adjust its boundaries due to population shifts in the precincts. The objective is to balance the per capita representation for each precinct in order to give all district constituents an equal say via their elected representatives regarding district policies and future directions. The TGR Board used the following criteria to make its final boundary adjustments: begin and end with identifiable boundaries maintain communities of interest & neighborhoods use whole voting precincts if possible base plan on existing districts adopt districts of relatively equal size draw districts that are compact and contiguous keep existing incumbents in their districts to preserve previous voter wishes tailor plan to comply with the Voting Rights Act The Board opened its planning documents up for public review and comment. At the Dec. 4 board meeting, the Board held a public hearing to receive any final comments before taking official actions to change the TGR precinct boundaries. After a thorough planning process and public comment period, the TGR Board officially changed its boundaries to reflect a more consistent population base in each precinct. Due to the change in boundaries, the district will be holding an election to fill all precinct seats in May, 2022. Click here for more information. Please see the charts below which show the population unbalance before the boundaries were changed and then the chart with showed precinct populations in balance after the official changes were made to the precinct boundaries. These new boundaries will remain in place until the next U.S. census reports are received. Resolution Approving the Redistricting of Director Precincts Effective December 9, 2021 Newly Adopted Precinct Boundaries The map above shows the current boundaries designated by the red lines. The colored areas which extend outside of the red lines demonstrate how the precinct boundaries were redrawn to bring the district into compliance with equal population representation guidelines. Click on this link to download a PDF of this map to review it in more detail. Click on this link to see the current TGR District Precinct map. See District Precincts Map Population and Demographic Adjustments The two charts below show where the population and demographics for each TGR precinct before the board changed the precinct boundaries and how they changed after redrawing boundaries occurred. The first chart shows the existing population. The second chart shows the population representation numbers with new boundaries.

Looking for water data? You've come to the right place. You can find water well locations and data at this page. Trinity Aquifer in Northern Bexar County The Trinity Aquifer is one of nine major aquifers defined by the state , stretching from the Texas Hill Country into Oklahoma, and it is the primary water source within the Trinity Glen Rose Groundwater Conservation District (TGR). Though often referred to as a single aquifer, the Trinity Aquifer is really a group of aquifers , experts say. It’s divided into three units — the Upper, Middle and Lower Trinity — and within those are more layers, or strata, made up of different formations, all of which allow water to move through in different ways and at different rates. TRINITY AQUIFER EDUCATION You can download a technical geologic and hydrologic report of the Trinity Aquifer by clicking this link. The Trinity system stretches across 61 counties from northeast of Dallas to southwest of San Antonio covering more than 10,000 square miles at the surface and more than 21,000 square miles below ground. It runs throughout much of the Hill Country, including all or portions of Kendall, Comal, Hays and Blanco counties, and is considered one of the “most extensive and highly used groundwater resources in Texas” by the Texas Water Development Board. The Trinity Aquifer is a low production aquifer which recharges slowly, with only an estimated 4–5% of rain recharging it. Despite its slow recharge rate, it stands as one of Texas’ most extensive and heavily used groundwater resources. Primarily utilized by municipalities, it also serves as a vital source for rural homes, irrigation, livestock, and other domestic uses. Trinity Aquifer Trinity Aquifer Subgroup (down dip) Trinity Aquifer in Northern Bexar County Trinity Aquifer water well depths vary from shallow, hand-dug wells to drilled wells that can be more than 1,200 feet deep based on TWDB records for Bexar County. Depths are highly variable and depend entirely on site-specific topography and geology, especially faulting. Well yields in the Trinity are typically dependent on the nature of fractures and dissolution features intersected by the well bore, which can be highly variable over short distances. Well yields are typically low (less than 20 gallons per minute (gpm) ) but may occasionally be significantly higher, with yields of 400-600 gpm being reported in some wells. Water quality within a specific aquifer can be defined or characterized in a general sense, but can vary significantly based on local geology, hydrology, and structure. The Trinity Glen Rose District is located in the southern portion of the Trinity Aquifer where it underlies the Texas Hill Country. The District includes the northern third of Bexar County as well as small parts of Comal and Kendall counties and is part of the Edwards Plateau. Although it is defined by the state as a major aquifer, the water quality and productivity of the Trinity Aquifer throughout the region, including the District, varies greatly. The District is located entirely within the San Antonio River basin and is divided by three sub-basins: the Cibolo Creek, Medina River, and Upper San Antonio River sub-basins. The Cibolo Creek, Leon Creek, Salado Creek, and the Upper San Antonio River watersheds provide for surface drainage generally from the northwest to the southeast within the District. Cibolo Creek is a tributary of the San Antonio River and drains from northwest to southeast across the Trinity Group of Aquifers, where it is a major recharge feature of these aquifers. Cibolo Creek is also the county boundary between portions of northern Bexar County and adjacent counties to the north and east. Salado and Leon Creeks flow from northwest to southeast through the middle of the District, eventually joining the San Antonio and Medina Rivers to the south. Trinity Aquifer Surface Geology & Fault Map - Click the Map to View Interactive Map Recharge to the Trinity Group of Aquifers occurs via local precipitation on its outcrop, infiltration of flows in Cibolo Creek, and through the overlying units where the Trinity is present in the subsurface. The quantification of recharge to the Trinity Aquifer in the Hill Country is difficult and estimates of recharge to the Trinity Aquifer vary significantly, from as low as 1.5 percent of precipitation to as much as 11 percent of precipitation (Muller and Prince, 1979; Kuniansky, 1989). Most estimates are between 4 and 7 percent of precipitation (Mace and others, 2000). However, the recharge dynamics in the District are quite different than the Trinity Aquifer throughout much of the Hill Country due to the rapid recharge that occurs through large recharge features, which are present in many areas of the District, but most prevalent in the Cibolo Creek area. When Cibolo Creek has water in the stretches along northern Bexar County, the losses of water from the creek are substantial and serve as a significant recharge source to the Trinity Aquifer in the District. Although this rapid recharge can occur in other isolated areas of the Trinity Aquifer in the Hill Country, it is a dominant recharge mechanism in the District. The substantial volume of recharge that periodically occurs during wet periods and flooding along Cibolo Creek creates relatively large variations in water levels in the Trinity Aquifer in the District. When water levels are high in the District, there is a natural hydraulic gradient that drives groundwater laterally to the southeast into the Edwards Aquifer. After groundwater is recharged to the aquifer, the karstic nature of many of the formations allow the rapid movement of groundwater through the aquifer. The result can be large fluctuations in water levels in wells as groundwater moves quickly through the aquifer. Dolomitic Limestone Fossiliferous Limestone Shale and Sandstone Discharge from the Trinity Aquifer - When water levels are high in the District, there is a greater driving force to move groundwater laterally to the southeast into the Edwards Aquifer. While the Edwards Aquifer does receive large volumes of water from the Trinity Aquifer, water wells are also a primary source of discharge from the Trinity in Bexar County. Historic pumping from the Trinity Aquifer within Bexar County has increased over time, from approximately 11,000 acre-feet in 2009 to greater than 23,000 acre-feet per year since 2016. Production from wells can vary significantly based on water levels in the Trinity. Water demand will continue to increase in the Hill Country, and this may add more pressure to increase groundwater production from the Trinity Aquifer in the District. Production from the Trinity Aquifer is primarily used for municipal purposes, with some production for domestic, irrigation, livestock and mining. More than 80 percent of the current groundwater production from the Trinity in the District is used for public water supply. Brackish Water in the Trinity Aquifer The Texas Water Development Board (TWDB) Brackish Resources Aquifer Characterization System (BRACS) Program was established in 2009 to map and characterize the brackish portions of Texas aquifers to provide useful information and data to regional water planning groups and other entities interested in using brackish groundwater as a water supply. Both Texas industry and public water supply planners are looking at brackish groundwater to supplement stressed freshwater resources. Brackish groundwater is a significant water supply component that can be used to meet future water demands. Groundwater desalination strategies in the 2022 State Water Plan represent additional new groundwater supply for nine of the regional planning groups. Desalination of brackish groundwater has been recommended as an additional supply volume of approximately 19,000 acre-feet per year in 2020, with an additional 157,000 acre-feet per year of brackish groundwater recommended to be in service by 2070. Trinity Aquifer in Northern Bexar County (dark green) Bexar County The Hill Country Trinity Aquifer is the southern portion of the larger Trinity Aquifer system, one of Texas’ nine major aquifers. It extends across roughly 15,500 square miles of Central Texas, spanning 24 counties from the Hill Country to the Gulf Coastal Plain. Composed of layered Cretaceous-age limestone, sandstone, and shale of the Trinity Group, the aquifer thickens southeastward and is heavily faulted by the Balcones and Luling Fault Zones, which influence groundwater flow and salinity. The aquifer includes six primary water-bearing units divided into 3 hydrologic units: the Upper Trinity, Middle Trinity, and Lower Trinity. The map above displays the study area boundary and the official TWDB Trinity Aquifer boundary. The outcrop (in dark green) is the area where the aquifer is exposed at the surface or is very close to the surface. The downdip or subcrop (in lighter green) is the portion of the aquifer that is below the surface, under other formations. The BRACS study boundary extends further downdip than the official aquifer footprint because brackish studies focus on deeper portions of the aquifer. VIEW THE BRACKISH WATER STORY MAP HERE

This the TGR District Precincts Page with a map of the five precincts where representatives are elected. Trinity Glen Rose District Precinct Map Use the map to determine which precinct you live in Dr. Stuart Birnbaum Precinct 1 Joe duMenil Precinct 2 Steven Peterson Precinct 3 Joe Silman Precinct 4 Katrina Waring Castillo Precinct 5 Use the map to locate your District when using Google Chrome, Mozilla Firefox, and Microsoft Edge. For Safari users, click here to determine the District in which you reside. Click here to see old redistricting plan page.

Looking for water data? You've come to the right place. You can find water well locations and data at this page. LANDOWNER OPPORTUNITIES Hill Country Alliance Sponsors Field Day to Teach Soil Erosion Prevention Best Practices - March 28, 2026 The Hill Country Alliance (HCA) is sponsoring the Hillside Stewardship Workshop on Saturday, March 28th for Hill Country landowners interested in reducing erosion, enhancing groundwater infiltration, and boosting plant productivity. The group will be hosted at Pure Pastures Ranch in Canyon Lake, TX for this hands-on field day. The soil preservation information will be presented by Dr. Mollie Walton, a restoration ecologist with more than 30 years of experience helping landowners restore land productivity. Participants will learn how to read the landscape in order to determine where and how to build erosion control structures featured in HCA's Hillside Stewardship Guide. These low-tech strategies for slowing and sinking water have rippling benefits for soil moisture, drought resilience, and habitat enhancement. Space is limited, so make sure to sign up soon. To learn more and register, click this link: Register Here. If you have any questions, please feel free to reach out to Lauro: lauro@hillcountryalliance.org . Camp Bullis Sentinel Landscape Regional Conservation Partnership Program Learn about Land Management Priorities The priorities of this project involve addressing ecological resource concerns that will benefit both the mission of Joint Base San Antonio-Camp Bullis and the land stewards and residents in the project area. Land Management Resource Concerns The ecological concerns and priorities in the project area are water quality and conservation, plant health and restoration of our native plant communities, soil quality, and improving habitat for grazing and wildlife. Land Management Practices To address these resource concerns, eligible practices are selected as the tools and processes to get conservation on the ground. Eligible land management practices will focus on water quality and riparian health including planting and protecting vegetative buffers around waterways. Waterways that are named and flowing into Camp Bullis will have a higher priority for funding. Other practices will be used to improve and restore upland communities. These practices will include prescribed grazing, selective brush management, and native plant restoration for wildlife and pollinator species. Practices will be also used to improve soil health. Our project specialists will meet with you and design a conservation plan that will specifically meet your needs and the needs of the land. Funding will be attached to these conservation plans to aid in implementation. Read more by clicking on this link. Camp Bullis Sentinel Landscape Partnership web page Program Partners * More than 50+ partners Texas A&M Natural Resources Institute Joint Base San Antonio Trinity Glen Rose Groundwater Conservation District The Cibolo Conservancy Land Trust Edwards Aquifer Authority Greater Edwards Aquifer Alliance Green Spaces Alliance Hill Country Alliance The Nature Conservancy of Texas Texas Agricultural Land Trust Camp Bullis Sentinel Landscape Area The project area is outlined in red.

Learn about the latest activities of the Trinity Glen Rose District board of directors. TGR UPCOMING MEETINGS TGR Board Meetings Regular Board Meeting & Public Hearing for Public Comments of Proposed DFCs Date: July 16 , 2026, 10:00 am Location: District Conference Room, 12274 Bandera Road #106, Helotes, TX 78023 *The GMA 9 adopted proposed Desired Future Conditions (DFC) on March 31, 2026. A 90-day public comment period is open through Monday, July 20, 2026. The District will hold a public hearing on the proposed DFCs relevant to the District for public comment July 16, 2026. Comments may also be submitted to the District during the 90-day public comment period at any time. Please visit the GMA 9 'Current Planning Documents' for the 4th Planning Cycle to information pertaining to the adopted proposed DFCs, here . Board Financial Workshop Date: June 30, 2026, 10:00 am Location: District Conference Room, 12274 Bandera Road #106, Helotes, TX 78023 Current Board Meeting Agenda Board Meeting Archives TGR Board Log In Member Resources