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CITY OF LA FERIA

PWS ID: TX0310003 · LA FERIA, Texas 78559-5002

CITY OF LA FERIA serves 7,226 people in LA FERIA, Texas using Surface Water water sources. It has 171 recorded EPA violations, including 101 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (5 compounds found).

Water Quality Snapshot: CITY OF LA FERIA

CITY OF LA FERIA is a local-owned community water system that delivers drinking water to 7,226 residents in LA FERIA, Texas (Cameron County) through 3,454 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 171 total violations for this system , of which 101 (59%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 36 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is TTHM, recorded in 82 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 5 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 51.9 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. CITY OF LA FERIA's 171 violations sit above 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

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

Population Served
7,226
Total Violations
171
Health-Based Violations
101
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
3,454
County
Cameron
School/Daycare
No
MCL Violations
98
Monitoring Violations
36
Treatment Tech Violations
3

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 82 2016
Coliform (TCR) MCL 16 2015
Public Notice Other 12 2021
Interim Enhanced Surface Water Treatment Rule MR 11 2020
Coliform (TCR) MR 8 2006
Lead and Copper Rule MR 7 2020
Consumer Confidence Rule Other 7 2022
Revised Total Coliform Rule MON 4 2019
Surface Water Treatment Rule MR 4 2019
Interim Enhanced Surface Water Treatment Rule TT 3 2021
CARBON, TOTAL MR 2 2020

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 11 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
ADONA 8/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 8/23/2023 <0.002 µg/L 0.002 µg/L Not Detected
4:2 FTS 8/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 8/23/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/23/2023 0.0053 µg/L 0.005 µg/L Detected
6:2 FTS 8/23/2023 <0.005 µg/L 0.005 µg/L Not Detected
8:2 FTS 8/23/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 8/23/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 8/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 8/23/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 8/23/2023 <0.004 µg/L 0.004 µg/L Not Detected
11Cl-PF3OUdS 8/23/2023 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 8/23/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFEESA 8/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 8/23/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 8/23/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 8/23/2023 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 8/23/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFHpS 8/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
lithium 8/23/2023 43.3000 µg/L 9 µg/L Detected
PFBS 8/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 8/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 8/23/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFOS 8/23/2023 0.0041 µg/L 0.004 µg/L Detected
PFOA 8/23/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 8/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 8/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/23/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 5/9/2023 <0.004 µg/L 0.004 µg/L Not Detected
lithium 5/9/2023 39.6000 µg/L 9 µg/L Detected
PFBS 5/9/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 5/9/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFHpS 5/9/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 5/9/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 5/9/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 5/9/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 5/9/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/9/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/9/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 5/9/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 5/9/2023 0.0053 µg/L 0.005 µg/L Detected
HFPO-DA 5/9/2023 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 5/9/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 5/9/2023 <0.004 µg/L 0.004 µg/L Not Detected
NEtFOSAA 5/9/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFMBA 5/9/2023 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 5/9/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFTA 5/9/2023 <0.008 µg/L 0.008 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 CITY OF LA FERIA.

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 TX0310003 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 CITY OF LA FERIA 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
2022 Consumer Confidence Rule Other 7 SDWIS / TX0310003 / 7000
2021 Public Notice Other 12 SDWIS / TX0310003 / 7500
2021 Interim Enhanced Surface Water Treatment Rule TT 3 SDWIS / TX0310003 / 0300
2020 Interim Enhanced Surface Water Treatment Rule MR 11 SDWIS / TX0310003 / 0300
2020 Lead and Copper Rule MR 7 SDWIS / TX0310003 / 5000
2020 CARBON, TOTAL MR 2 SDWIS / TX0310003 / 2920
2019 Revised Total Coliform Rule MON 4 SDWIS / TX0310003 / 8000
2019 Surface Water Treatment Rule MR 4 SDWIS / TX0310003 / 0200
2016 TTHM MCL 82 SDWIS / TX0310003 / 2950
2015 Coliform (TCR) MCL 16 SDWIS / TX0310003 / 3100
2006 Coliform (TCR) MR 8 SDWIS / TX0310003 / 3100

How CITY OF LA FERIA Compares

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

Metric CITY OF LA FERIA Texas avg Federal benchmark
Total violations 171 101.5 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 101 22.2 Indicates a contaminant exceeded a federal MCL
PFAS detection 5 compounds 93.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 7,226 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 CITY OF LA FERIA water safe to drink? ▼
CITY OF LA FERIA (PWS ID: TX0310003) has 171 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 5 PFAS compounds found. This system serves 7,226 people using Surface Water sources.
How many people does CITY OF LA FERIA serve? ▼
CITY OF LA FERIA serves 7,226 people in LA FERIA, Texas. It is a Local-owned system using Surface Water water sources with 3,454 service connections.
What type of violations does CITY OF LA FERIA have? ▼
CITY OF LA FERIA has 171 total violations: 101 health-based violations (MCL exceedances or treatment failures), 36 monitoring/reporting violations, and 3 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in CITY OF LA FERIA water? ▼
Yes. UCMR5 testing detected 5 PFAS compounds in CITY OF LA FERIA's water supply: PFBA, lithium, PFOS, PFHxA, PFPeA. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does CITY OF LA FERIA use? ▼
CITY OF LA FERIA 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