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ZAPATA COUNTY WATERWORKS SWTP

PWS ID: TX2530002 · ZAPATA, Texas 78076-2944

ZAPATA COUNTY WATERWORKS SWTP serves 13,736 people in ZAPATA, Texas using Surface Water water sources. It has 95 recorded EPA violations, including 82 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (2 compounds found).

Water Quality Snapshot: ZAPATA COUNTY WATERWORKS SWTP

ZAPATA COUNTY WATERWORKS SWTP is a local-owned community water system that delivers drinking water to 13,736 residents in ZAPATA, Texas (Zapata County) through 4,292 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 95 total violations for this system , of which 82 (86%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 2 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is TTHM, recorded in 39 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 2 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 30.9 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across Texas, EPA tracks 7,351 public water systems serving 33,253,313 people, with 746,210 cumulative violations and 162,945 health-based violations on record. About 90% of systems in the state carry at least one violation, and state-wide the average per system is 101.5 violations. ZAPATA COUNTY WATERWORKS SWTP's 95 violations sit below the Texas average. Statewide, 1,068 of 1,147 UCMR5-tested systems have reported PFAS detections (93.1%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

2 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
13,736
Total Violations
95
Health-Based Violations
82
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
4,292
County
Zapata
School/Daycare
No
MCL Violations
74
Monitoring Violations
2
Treatment Tech Violations
8

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 39 2006
Total Haloacetic Acids (HAA5) MCL 30 2005
Interim Enhanced Surface Water Treatment Rule TT 8 2010
Consumer Confidence Rule Other 5 2024
Revised Total Coliform Rule MCL 5 2023
Lead and Copper Rule MR 1 1992
Surface Water Treatment Rule MR 1 2003

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 3 of 35 samples detected PFAS.

Contaminant Date Result MRL Status
PFPeA 8/28/2025 0.0032 µg/L 0.003 µg/L Detected
11Cl-PF3OUdS 8/28/2025 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 8/28/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/28/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 8/28/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/28/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 8/28/2025 <0.004 µg/L 0.004 µg/L Not Detected
9Cl-PF3ONS 8/28/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFMBA 8/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 8/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 8/28/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 8/28/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 8/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 8/28/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 8/28/2025 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 8/28/2025 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 8/28/2025 <0.005 µg/L 0.005 µg/L Not Detected
lithium 8/28/2025 29.4000 µg/L 9 µg/L Detected
PFUnA 8/28/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 8/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/28/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/28/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 8/28/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 8/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 8/28/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 11/19/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 11/19/2025 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 11/19/2025 <0.006 µg/L 0.006 µg/L Not Detected
lithium 11/19/2025 30.9000 µg/L 9 µg/L Detected
NEtFOSAA 11/19/2025 <0.005 µg/L 0.005 µg/L Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records — or to file a complaint, request a Consumer Confidence Report, or check current monitoring status — go directly to the federal and state regulators that enforce the Safe Drinking Water Act for ZAPATA COUNTY WATERWORKS SWTP.

Federal Source of Truth

EPA SDWIS — Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID TX2530002 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Texas Drinking Water Authority

Texas Commission on Environmental Quality (TCEQ) — Drinking Water Watch is the primacy agency that licenses and inspects ZAPATA COUNTY WATERWORKS SWTP under EPA-delegated authority.

Open TX regulator portal

Source: Texas Commission on Environmental Quality (TCEQ) — Drinking Water Watch

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Consumer Confidence Rule Other 5 SDWIS / TX2530002 / 7000
2023 Revised Total Coliform Rule MCL 5 SDWIS / TX2530002 / 8000
2010 Interim Enhanced Surface Water Treatment Rule TT 8 SDWIS / TX2530002 / 0300
2006 TTHM MCL 39 SDWIS / TX2530002 / 2950
2005 Total Haloacetic Acids (HAA5) MCL 30 SDWIS / TX2530002 / 2456
2003 Surface Water Treatment Rule MR 1 SDWIS / TX2530002 / 0200
1992 Lead and Copper Rule MR 1 SDWIS / TX2530002 / 5000

How ZAPATA COUNTY WATERWORKS SWTP Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric ZAPATA COUNTY WATERWORKS SWTP Texas avg Federal benchmark
Total violations 95 101.5 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 82 22.2 Indicates a contaminant exceeded a federal MCL
PFAS detection 2 compounds 93.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 13,736 4,524 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 7,351 regulated public water systems in Texas.

Federal MCL reference — Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is ZAPATA COUNTY WATERWORKS SWTP water safe to drink? ▼
ZAPATA COUNTY WATERWORKS SWTP (PWS ID: TX2530002) has 95 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 2 PFAS compounds found. This system serves 13,736 people using Surface Water sources.
How many people does ZAPATA COUNTY WATERWORKS SWTP serve? ▼
ZAPATA COUNTY WATERWORKS SWTP serves 13,736 people in ZAPATA, Texas. It is a Local-owned system using Surface Water water sources with 4,292 service connections.
What type of violations does ZAPATA COUNTY WATERWORKS SWTP have? ▼
ZAPATA COUNTY WATERWORKS SWTP has 95 total violations: 82 health-based violations (MCL exceedances or treatment failures), 2 monitoring/reporting violations, and 8 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in ZAPATA COUNTY WATERWORKS SWTP water? ▼
Yes. UCMR5 testing detected 2 PFAS compounds in ZAPATA COUNTY WATERWORKS SWTP's water supply: PFPeA, lithium. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does ZAPATA COUNTY WATERWORKS SWTP use? ▼
ZAPATA COUNTY WATERWORKS SWTP uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial