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MCCOY WSC

PWS ID: TX0070023 · PLEASANTON, Texas 78064-0000

MCCOY WSC serves 9,621 people in PLEASANTON, Texas using Groundwater water sources. It has 64 recorded EPA violations, including 20 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (2 compounds found).

Water Quality Snapshot: MCCOY WSC

MCCOY WSC is a local-owned community water system that delivers drinking water to 9,621 residents in PLEASANTON, Texas (Atascosa County) through 3,207 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 64 total violations for this system , of which 20 (31%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 28 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Revised Total Coliform Rule, recorded in 20 violations (MON). Under EPA's UCMR5 PFAS monitoring program, 2 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 62.2 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. MCCOY WSC's 64 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
9,621
Total Violations
64
Health-Based Violations
20
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
3,207
County
Atascosa
School/Daycare
No
MCL Violations
20
Monitoring Violations
28
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Revised Total Coliform Rule MON 20 2021
Coliform (TCR) MCL 11 2012
Public Notice Other 7 2012
Gross Alpha, Excl. Radon and U MCL 5 2004
Combined Radium (-226 and -228) MCL 4 2004
Lead and Copper Rule MR 4 2020
E. COLI MR 4 2012

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 9 of 240 samples detected PFAS.

Contaminant Date Result MRL Status
11Cl-PF3OUdS 11/4/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTA 11/4/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 11/4/2024 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 11/4/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 11/4/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFBS 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 11/4/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 11/4/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 11/4/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 11/4/2024 62.2000 µg/L 9 µg/L Detected
PFUnA 11/4/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFMPA 11/4/2024 <0.004 µg/L 0.004 µg/L Not Detected
9Cl-PF3ONS 11/4/2024 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 11/4/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 11/4/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 11/4/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 11/4/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFPeA 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 11/4/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 11/4/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 11/4/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFOS 11/4/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpA 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 11/4/2024 14.4000 µg/L 9 µg/L Detected
NMeFOSAA 11/4/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFBS 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 11/4/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 11/4/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFNA 11/4/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 11/4/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 11/4/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFEESA 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 11/4/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 11/4/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 11/4/2024 <0.02 µg/L 0.02 µg/L Not Detected
11Cl-PF3OUdS 11/4/2024 <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 MCCOY WSC.

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 TX0070023 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 MCCOY WSC 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
2021 Revised Total Coliform Rule MON 20 SDWIS / TX0070023 / 8000
2020 Lead and Copper Rule MR 4 SDWIS / TX0070023 / 5000
2012 Coliform (TCR) MCL 11 SDWIS / TX0070023 / 3100
2012 Public Notice Other 7 SDWIS / TX0070023 / 7500
2012 E. COLI MR 4 SDWIS / TX0070023 / 3014
2004 Gross Alpha, Excl. Radon and U MCL 5 SDWIS / TX0070023 / 4000
2004 Combined Radium (-226 and -228) MCL 4 SDWIS / TX0070023 / 4010

How MCCOY WSC Compares

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

Metric MCCOY WSC Texas avg Federal benchmark
Total violations 64 101.5 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 20 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 9,621 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 MCCOY WSC water safe to drink? ▼
MCCOY WSC (PWS ID: TX0070023) has 64 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 2 PFAS compounds found. This system serves 9,621 people using Groundwater sources.
How many people does MCCOY WSC serve? ▼
MCCOY WSC serves 9,621 people in PLEASANTON, Texas. It is a Local-owned system using Groundwater water sources with 3,207 service connections.
What type of violations does MCCOY WSC have? ▼
MCCOY WSC has 64 total violations: 20 health-based violations (MCL exceedances or treatment failures), 28 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in MCCOY WSC water? ▼
Yes. UCMR5 testing detected 2 PFAS compounds in MCCOY WSC's water supply: lithium, 6:2 FTS. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does MCCOY WSC use? ▼
MCCOY WSC uses Groundwater 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