Hays County, Texas — public water systems
At a glance
118 active public water systems are filed under Hays County, Texas in EPA's SDWIS records, together reporting 306,428 people served. The largest is City of San Marcos, which reports serving 72,970 people. 52 are community water systems serving people where they live; the other 66 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
118
Population served
306.4K
Community systems
52
Groundwater share
64.4%
How does Hays County compare with other Texas counties?
Hays County has the 6th-most active public water systems among the 309 counties listed for active Texas systems in EPA records; among the 234 with 3 or more systems, the median has 12. Its systems report 306,428 people served in total, the 19th-largest county figure in the state and 0.9% of the statewide total. The average system here reports serving 2,597 people, about half of the Texas average of 4,789. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.
Where does Hays County's drinking water come from?
By primary water source, Hays County's active systems draw on groundwater (72, 61%), purchased surface water (40, 34%), groundwater under influence of surface water (3, 2.5%) and surface water (1, 0.8%). Overall, 64% rely mainly on groundwater (including purchased groundwater) and 35% on surface water, compared with 78% and 21% across Texas. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, City of San Marcos, draws primarily on surface water.
What kinds of water systems operate in Hays County?
Hays County's active systems break down as 52 community systems (44%), 12 non-transient non-community systems (10%) and 54 transient non-community systems (46%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (74%), local government (25%) and state government (1.7%).
The 50 largest water systems in Hays County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | City of San Marcos | Hays | 72,970 | Community | Surface water |
| 2 | City of Kyle | Hays | 52,000 | Community | Purchased surface water |
| 3 | Texas State University - San Marcos | Hays | 43,552 | Community | Groundwater |
| 4 | Goforth Sud | Hays | 34,893 | Community | Purchased surface water |
| 5 | County Line Sud | Hays | 19,609 | Community | Purchased surface water |
| 6 | City of Buda | Hays | 13,830 | Community | Purchased surface water |
| 7 | Dripping Springs WSC | Hays | 8,037 | Community | Purchased surface water |
| 8 | Plum Creek | Hays | 7,065 | Community | Purchased surface water |
| 9 | Wimberley WSC | Hays | 5,334 | Community | Groundwater |
| 10 | Hays Cisd Jack C Hays High School | Hays | 4,048 | Non-transient non-community | Groundwater |
| 11 | Hays County Wcid 2 | Hays | 3,381 | Community | Purchased surface water |
| 12 | Woodcreek Utility Co 2 | Hays | 3,096 | Community | Groundwater under influence of surface water |
| 13 | Hays County Wcid 1 | Hays | 2,850 | Community | Purchased surface water |
| 14 | Woodcreek Utility Co 1 | Hays | 2,700 | Community | Groundwater |
| 15 | South Buda Wcid 1 | Hays | 2,517 | Community | Purchased surface water |
| 16 | Headwaters at Barton Creek | Hays | 2,315 | Community | Purchased surface water |
| 17 | Cimarron Park Water | Hays | 2,079 | Community | Groundwater |
| 18 | Mid-Tex Utilities | Hays | 1,569 | Community | Purchased surface water |
| 19 | Meadow Woods Water Supply | Hays | 1,554 | Community | Groundwater |
| 20 | Leisurewoods Water | Hays | 1,338 | Community | Groundwater |
| 21 | Reunion Ranch Wcid | Hays | 1,326 | Community | Purchased surface water |
| 22 | Salt Lick Bar B Q | Hays | 1,143 | Transient non-community | Purchased surface water |
| 23 | Oak Meadows | Hays | 954 | Community | Groundwater |
| 24 | La Ventana Water Supply System | Hays | 747 | Community | Groundwater |
| 25 | Ruby Ranch WSC | Hays | 738 | Community | Groundwater |
| 26 | City of Mountain City | Hays | 725 | Community | Groundwater |
| 27 | Elliott Ranch Water System | Hays | 639 | Community | Groundwater |
| 28 | Promiseland Church San Marcos | Hays | 625 | Non-transient non-community | Groundwater |
| 29 | City of Dripping Springs | Hays | 531 | Community | Purchased surface water |
| 30 | Cedar Oak Mesa WSC | Hays | 497 | Community | Groundwater |
| 31 | Sierra West Subdivision | Hays | 495 | Community | Groundwater |
| 32 | Goldenwood West WSC | Hays | 462 | Community | Groundwater under influence of surface water |
| 33 | San Marcos Baptist Academy | Hays | 450 | Non-transient non-community | Groundwater |
| 34 | Chaparral Water System Hays | Hays | 444 | Community | Groundwater |
| 35 | Hays Youth Sports Complex | Hays | 400 | Transient non-community | Groundwater |
| 36 | Huntington Estates | Hays | 378 | Community | Groundwater |
| 37 | Trattoria Lisina | Hays | 350 | Transient non-community | Groundwater |
| 38 | Hawks Shadow Winery | Hays | 350 | Transient non-community | Purchased surface water |
| 39 | Oak Forest WSC | Hays | 339 | Community | Groundwater |
| 40 | River Oaks Ranch | Hays | 336 | Community | Groundwater |
| 41 | Southwest Territory | Hays | 315 | Community | Groundwater |
| 42 | Mountain Crest Water | Hays | 309 | Community | Groundwater |
| 43 | Horseshoe Ridge Rv Resort | Hays | 300 | Transient non-community | Groundwater |
| 44 | Hays Hills Baptist Church | Hays | 300 | Transient non-community | Groundwater |
| 45 | Henly Baseball Complex | Hays | 300 | Transient non-community | Groundwater |
| 46 | Sellers Wine Bar | Hays | 300 | Transient non-community | Purchased surface water |
| 47 | Driftwood Golf and Ranch Club | Hays | 294 | Community | Purchased surface water |
| 48 | Solaro Estate Winery | Hays | 289 | Transient non-community | Purchased surface water |
| 49 | Camp Young Judaea | Hays | 285 | Transient non-community | Groundwater |
| 50 | City of Hays | Hays | 270 | Community | Groundwater |
All other water systems in Hays County (66)
The remaining active systems filed under Hays County, largest first, with the population each reports serving.
- Skyline Ranch Estates WSC261
- Hays City Store250
- Fitzhugh Texas Brewpub250
- 999 Buttercup Lane Public Water System235
- Ladybird Montessori230
- St Marks Episcopal Church225
- The Fitz Rv Resort222
- Granite Creek WSC219
- Cardinal Valley Water216
- Wonderland School Water System206
- Texas Lehigh Cement200
- Vista Brewing200
- Treaty Oak Distillery180
- Ma Maison Event Venue150
- Beerburg Brewery150
- Texas State University - Freeman Center150
- My Real Life150
- Lucky Arrow Retreat142
- Copper Hills Water System141
- Havenwood Nature School130
- Lsr WSC126
- 12 Fox Beer125
- Camp Ben Mcculloch Ws125
- Radiance WSC120
- Saint Stephens Episcopal Church & School120
- Gateway Development108
- Twin Oaks Ranch103
- Shady Oaks Rv Resort and Park100
- Hhs Corporate Campus100
- Ghost Note Brewery100
- Senza Maestro Spirits100
- Junction Wtx100
- Driftwood Water Conservation99
- Cottonwood Creek Rv Park80
- Vfw Post 644180
- Wimberley Oaks WSC69
- Church of Christ at Buda Kyle68
- Jp and Lp Rentals60
- Farm House Escape60
- Henly Rv Park60
- Driftwood Recovery57
- Blue Agave Mobile Home Park57
- Duchman Family Winery55
- Sebring Medical Office Bldg50
- Onion Creek Inn50
- Roughhouse Brewery50
- Barton Springs Mill50
- Driftwood Buco50
- Signal Hill Water System 2442
- Graner Holdings42
- Pure Class Water Hauling40
- The 3907 Red River Water System40
- Middleton Brewing37
- Gateway Estates Iii36
- Burke Center for Youth35
- The Bygone34
- Hill Country Casitas30
- Prochnow Country Homes30
- Summer Moon Coffee30
- Twu Water Hauler Austin25
- Morgan Creek Barn25
- H2o2u Water Delivery25
- Texas Bulk Water25
- Oasis Water Delivery25
- Heart Water25
- Hamilton Pool Bulk Water25
Hays County water systems: frequently asked questions
How many public water systems are in Hays County, Texas?
EPA's SDWIS records file 118 active public water systems under Hays County, Texas: 52 community systems (44%), 12 non-transient non-community systems (10%) and 54 transient non-community systems (46%).
Who supplies drinking water in Hays County, TX?
The largest community water systems filed under Hays County are City of San Marcos (72,970 people served), City of Kyle (52,000 people served) and Texas State University - San Marcos (43,552 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.
Does Hays County's drinking water come from groundwater or surface water?
Of the 118 active public water systems in Hays County, 64% draw mainly on groundwater and 35% on surface water, counting purchased supplies. The largest system, City of San Marcos, uses surface water.
Where can I find a water quality report for Hays County?
Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 52 community systems are filed under Hays County, so the report to look for is the one from the system that supplies your address.
How can I check violations for a water system in Hays County?
Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.
More Texas water systems
- All Texas public water systems· 7,078 active
- Montgomery County· 438 systems
- Brazoria County· 309 systems
- Fort Bend County· 287 systems
- Travis County· 138 systems
- Tarrant County· 108 systems
- Kerr County· 98 systems
- How to find out who supplies your drinking water
- How to find and read your annual water quality report
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Public water systems in Hays County, Texas”, https://aquacensus.com/water-systems/texas/hays (data as of October 1, 2026).