Public water system · TX0220035
ActiveStudy Butte Terlingua Water System
At a glance
Study Butte Terlingua Water System (PWSID TX0220035) is an active community water system in Brewster County, Texas. It reports serving 888 people through 296 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in September 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
888
Service connections
296
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Study Butte Terlingua Water System compare with other water systems in Brewster County?
By EPA's size categories, Study Butte Terlingua Water System is a small system (501 to 3,300 people). Brewster County has 14 active public water systems, and Study Butte Terlingua Water System is the 3rd-largest of them by population served. Its population served is about 38% above the county average of 645 people per system, and accounts for 9.8% of the 9,031 people reported by systems filed under the county. Across Texas, the 7,078 active systems average 4,789 people each. Nationally, the average active community water system reports serving 6,703 people, so Study Butte Terlingua Water System is well below that figure.
What does “community water system” mean?
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. Texas has 4,594 active community water systems, 65% of the state's 7,078 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 5,215 Texas systems (74%) list groundwater as their primary source.
Who owns and regulates Study Butte Terlingua Water System?
EPA lists Study Butte Terlingua Water System as owned by a local government. The TX state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 3 of the 14 active systems in Brewster County (21%) are also owned by a local government.
Does Study Butte Terlingua Water System have drinking water violations?
Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in September 2024. The violations listed here began between April 2022 and September 2024. By type: 4 public notice, recordkeeping or other, 3 monitoring and reporting, 3 contaminant level above the legal limit and 2 required treatment not met. The contaminant or rule involved most often is Public Notice (4 of them). EPA lists 11 as resolved and 1 as unaddressed. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-09-19 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2024-03-31 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2023-05-21 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2023-05-21 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2023-04-01 | Required treatment not metOCCT/SOWT Study/Recommendation · code 57 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2023-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2023-03-31 | Required treatment not metOCCT/SOWT Study/Recommendation · code 57 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2023-02-08 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2022-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Gross alpha (excluding radon and uranium)code 4000 | Yes | Resolved |
| 2022-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Gross alpha (excluding radon and uranium)code 4000 | Yes | Resolved |
| 2022-06-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2022-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Gross alpha (excluding radon and uranium)code 4000 | Yes | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Study Butte Terlingua Water System: frequently asked questions
Who runs Study Butte Terlingua Water System?
Study Butte Terlingua Water System (PWSID TX0220035) is a community water system owned by a local government. It is regulated by the TX state drinking water program.
How many people does Study Butte Terlingua Water System serve?
Study Butte Terlingua Water System reports serving 888 people through 296 service connections in Brewster County, Texas.
Where does Study Butte Terlingua Water System get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Study Butte Terlingua Water System have any drinking water violations?
Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in September 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Study Butte Terlingua Water System's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in September 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the TX state drinking water program.
Where can I find Study Butte Terlingua Water System's water quality report?
As a community water system, Study Butte Terlingua Water System must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Brewster County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Alpine | Brewster | 6,000 | Community | Groundwater |
| Lajitas on the Rio Grande | Brewster | 942 | Community | Groundwater |
| Marathon Water Supply & Sewer Service | Brewster | 430 | Community | Groundwater |
| Panther Junction Plt | Brewster | 300 | Community | Groundwater |
| Longhorn Ranch Motel | Brewster | 100 | Transient non-community | Groundwater |
| Big Bend National Park Chisos Basin Ws | Brewster | 81 | Transient non-community | Groundwater under influence of surface water |
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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, “Study Butte Terlingua Water System, PWSID TX0220035, Texas”, https://aquacensus.com/water-systems/texas/study-butte-terlingua-water-system-tx0220035 (data as of October 1, 2026).