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There are a tremendous number of resources you can access related to local, regional and state regulatory agencies which you can find here. There are also some great interactive maps here which show information about each monitoring water well in the district.

Need Help with Water Quality Testing?

If you feel that your water has a quality issue and you are on a municipal supply, please contact your purveyor (e.g. City of Fair Oaks Ranch, Grey Forest Utilities, Southwest Water Co., Aqua Texas, SAWS, etc.). The photo above is from the Guadalupe-Blanco River Authority lab. 

Regional Labs

Guadalupe-Blanco River Authority 

City of San Antonio Metro Health – (210)207-8887 (basic bacteriological testing only) 

Pollution Control Services – (210)340-0343

San Antonio Testing Laboratory – (210)229-9920

T.C.E.Q. List of Accredited Laboratories

Need Help with Your Water Well?
Water well testing 2.jpg

Regular maintenance of your groundwater well can prolong its life and protect your health and safety. The Texas Well Owners Network and other various organizations provide useful documents and criteria to evaluate the health of your well.


The most requested publications for groundwater well health and maintenance can be found on the Texas Well Owner Network website. Topics include Water Well Basics, disinfecting wells, drinking water quality, abandoned wells, protecting your well during drought, and many more.

Texas Well Owner Network

National Groundwater Association

Want to know more about PFAS and potential effects with groundwater wells, please see this handout put out by the National Groundwater Association. PFAS for Private Well Owners

For a complete list of licensed well drillers, please visit the Texas Department of Licensing and Regulation website. Please feel free to contact the District for more information.

Helpful Website Links
Helpful Website Links
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