County · Texas
Hays County, Texas: drinking water records
Explore EPA records for 54 community water systems across 7 ZIP codes in Hays County, then find water-testing resources and available recent monitoring-station readings.
Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages
Drinking-water records
EPA survey and compliance records are historical reports. UCMR 5 results are available for 10 of the 54 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems in this county
All 54 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| City of San Marcos TX1050001 | 72,970 | 780 | 3 | 1 | 1.6 ppbbelow the action level |
| Goforth SUD TX1050019 | 34,893 | 360 | 5 | 2 | 0 ppbbelow the action level |
| La Ventana Water Supply System TX1050131 | 747 | 56 | 0 | 1 | 2.5 ppbbelow the action level |
| City of Kyle TX1050002 | 52,000 | 300 | 3 | 0 | 1.9 ppbbelow the action level |
| Texas State University - San Marcos TX1050003 | 43,552 | 60 | 0 | 0 | 1.3 ppbbelow the action level |
| County Line SUD TX1050038 | 19,609 | 180 | 1 | 0 | 0 ppbbelow the action level |
| City of Buda TX1050012 | 13,830 | 600 | 2 | 0 | 1.5 ppbbelow the action level |
| Dripping Springs WSC TX1050013 | 8,037 | 180 | 0 | 0 | 1.9 ppbbelow the action level |
| Plum Creek TX1050028 | 7,065 | 240 | 0 | 0 | 1.2 ppbbelow the action level |
| Wimberley WSC TX1050018 | 5,334 | 180 | 0 | 0 | 2.1 ppbbelow the action level |
| Woodcreek Utility Co 2 TX1050039 | 3,096 | 0 | 0 | 1 | 2 ppbbelow the action level |
| Goldenwood West WSC TX1050081 | 462 | 0 | 0 | 1 | 1 ppbbelow the action level |
| Skyline Ranch Estates WSC TX1050078 | 261 | 0 | 0 | 1 | 1.3 ppbbelow the action level |
| Lsr WSC TX1050135 | 126 | 0 | 0 | 1 | 0.9 ppbbelow the action level |
| Radiance WSC TX1050075 | 120 | 0 | 0 | 8 | 0.6 ppbbelow the action level |
| Cielo Azul Ranch TX1050034 | 84 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Wimberley Oaks WSC TX1050120 | 69 | 0 | 0 | 2 | 0 ppbbelow the action level |
| Blue Agave Mobile Home Park TX1050105 | 57 | 0 | 0 | 1 | 2.9 ppbbelow the action level |
| Signal Hill Water System 24 TX1050035 | 42 | 0 | 0 | 1 | 1 ppbbelow the action level |
| Prochnow Country Homes TX1050191 | 30 | 0 | 0 | 1 | 0 ppbbelow the action level |
| Hays County WCID 2 TX1050148 | 3,381 | 0 | 0 | 0 | 2.9 ppbbelow the action level |
| Hays County WCID 1 TX1050137 | 2,850 | 0 | 0 | 0 | 1.0 ppbbelow the action level |
| Woodcreek Utility Co 1 TX1050037 | 2,700 | 0 | 0 | 0 | 1.1 ppbbelow the action level |
| South Buda WCID 1 TX1050154 | 2,517 | 0 | 0 | 0 | 0.8 ppbbelow the action level |
| Headwaters at Barton Creek TX1050184 | 2,315 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Cimarron Park Water TX1050059 | 2,079 | 0 | 0 | 0 | 3.3 ppbbelow the action level |
| Mid-Tex Utilities TX1050157 | 1,569 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Meadow Woods Water Supply TX1050077 | 1,554 | 0 | 0 | 0 | 3.9 ppbbelow the action level |
| Leisurewoods Water TX1050043 | 1,338 | 0 | 0 | 0 | 3.5 ppbbelow the action level |
| Reunion Ranch WCID TX1050175 | 1,326 | 0 | 0 | 0 | 0.6 ppbbelow the action level |
| Oak Meadows TX1050100 | 954 | 0 | 0 | 0 | 0.7 ppbbelow the action level |
| Ruby Ranch WSC TX1050122 | 738 | 0 | 0 | 0 | 2.9 ppbbelow the action level |
| City of Mountain City TX1050062 | 725 | 0 | 0 | 0 | 1.2 ppbbelow the action level |
| Elliott Ranch Water System TX1050132 | 639 | 0 | 0 | 0 | 2.6 ppbbelow the action level |
| City of Dripping Springs TX1050187 | 531 | 0 | 0 | 0 | 1.0 ppbbelow the action level |
| Cedar Oak Mesa WSC TX1050031 | 497 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Sierra West Subdivision TX1050134 | 495 | 0 | 0 | 0 | 6.9 ppbbelow the action level |
| Chaparral Water System Hays TX1050029 | 444 | 0 | 0 | 0 | 0.8 ppbbelow the action level |
| Huntington Estates TX1050124 | 378 | 0 | 0 | 0 | 0.5 ppbbelow the action level |
| Oak Forest WSC TX1050128 | 339 | 0 | 0 | 0 | 0.6 ppbbelow the action level |
| River Oaks Ranch TX1050099 | 336 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Southwest Territory TX1050058 | 315 | 0 | 0 | 0 | 0.5 ppbbelow the action level |
| Mountain Crest Water TX1050111 | 309 | 0 | 0 | 0 | 1.5 ppbbelow the action level |
| City of Hays TX1050004 | 270 | 0 | 0 | 0 | 0.6 ppbbelow the action level |
| Granite Creek WSC TX1050080 | 219 | 0 | 0 | 0 | 1.3 ppbbelow the action level |
| Cardinal Valley Water TX1050068 | 216 | 0 | 0 | 0 | 0 ppbbelow the action level |
| The Woodlands Water System TX1050139 | 195 | 0 | 0 | 0 | 3.5 ppbbelow the action level |
| Copper Hills Water System TX1050082 | 141 | 0 | 0 | 0 | 2.0 ppbbelow the action level |
| Gateway Development TX1050121 | 108 | 0 | 0 | 0 | 5.0 ppbbelow the action level |
| Jp and LP Rentals TX1050180 | 60 | 0 | 0 | 0 | 0 ppbbelow the action level |
| Gateway Estates III TX1050116 | 36 | 0 | 0 | 0 | 1.4 ppbbelow the action level |
| Driftwood Golf and Ranch Club TX1050208 | 294 | 0 | 0 | 0 | not reported |
| Alliance Regional Water Authority TX1050197 | 0 | 0 | 0 | 0 | not reported |
| Gbra Ih-35 Transmission Main TX1050149 | 0 | 0 | 0 | 0 | not reported |
USGS · Monitoring stations
The water, more recently.
Available station readings in Hays County, Texas. Each measurement keeps its time, unit and original source.
These readings describe water at a monitoring station. They do not test your tap, measure PFAS or lead, or determine whether water is safe to drink or swim in.
Recent observations load when this section comes into view.
How these readings update
We check for updates every 10 minutes while this section is visible and show supported observations from the last 48 hours. The time beside a reading is when USGS measured it; the checked time is when our service retrieved the response. We mark a reading more than 6 hours old as older. Provisional observations can change after USGS review. A missing reading does not mean zero or clean water.
Temperature, pH, dissolved oxygen, turbidity, conductivity, streamflow and water level are shown only where a station reports them. Different measurements have different units and sampling intervals. USGS data and documentation.
Your next step
Water testing, reports & local help.
Use these official directories to find your drinking-water agency, a certified laboratory and public water records. We have not yet added an individually reviewed local resource list for this county.
Official national directories
Water testing
Find your state’s private-well program
EPA’s state directory points well owners to local program information. Services and eligibility vary by state and county.
Water testing
Find a certified drinking-water laboratory
Use EPA’s directory to reach your state’s laboratory certification program. EPA does not provide on-request testing of residential drinking water.
Public records
Find your utility’s Consumer Confidence Report
EPA links to community water-system reports and explains how to read them. Look for your actual supplier rather than assuming every address in a county shares one system.
Public records
Explore USGS water observations
Find current and historical observations from USGS monitoring locations, including available stream, lake, and groundwater data. Measurements vary by station and do not replace a test of your household water.
A county overview cannot identify every property’s water provider. If you use a public water system, confirm its name on your bill and request its annual Consumer Confidence Report. Private wells need their own testing; public-system records do not describe a private well.
Understand water testing and laboratory reportsResource descriptions are compiled by Tap Water Lookup. Review dates describe our source check, not a new water sample. How we review sources · Suggest a correction
Explore your area
Local coverage in Hays County
7ZIP areas in this overview
Explore the water-system records, recent station readings and testing resources on this county page. They describe the systems and stations identified in each section; they are not a separate water test for every community.
Towns and communities
- Belterra
- Buda
- Driftwood
- Dripping Springs
- Kyle
- San Marcos
- Wimberley
View ZIP areas and understand coverage
- 78610Buda
- 78619Driftwood
- 78620Dripping Springs
- 78640Kyle
- 78666San Marcos
- 78676Wimberley
- 78737Belterra
These Census ZIP Code Tabulation Areas are grouped here by their largest county overlap. A ZIP area can cross county lines and contain several water suppliers or private wells. Place labels reflect Census geography, not verified postal city names or utility service boundaries.
Records for these areas are currently presented in this county overview rather than individual ZIP reports. An unpublished report does not mean there are no water records. Confirm your supplier on your water bill; if you use a private well, testing your own well is the relevant next step.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.
Compiled by Tap Water Lookup from the sources identified on this page. Read the methodology and review process.