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HARRIS COUNTY MUD 354

PWS ID: TX1012965 · HOUSTON, Texas 77010-3095

HARRIS COUNTY MUD 354 serves 6,588 people in HOUSTON, Texas using Groundwater water sources. It has 23 recorded EPA violations, including 12 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: HARRIS COUNTY MUD 354

HARRIS COUNTY MUD 354 is a local-owned community water system that delivers drinking water to 6,588 residents in HOUSTON, Texas (Harris County) through 2,196 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 23 total violations for this system , of which 12 (52%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 6 monitoring and reporting violations are on file. The most recent violation on record dates to 2016.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 9 violations (TT, health-based). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 25.8 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. HARRIS COUNTY MUD 354's 23 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

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

Population Served
6,588
Total Violations
23
Health-Based Violations
12
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
2,196
County
Harris
School/Daycare
No
MCL Violations
3
Monitoring Violations
6
Treatment Tech Violations
9

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule TT 9 2016
Lead and Copper Rule MR 6 2016
Public Notice Other 5 2016
Coliform (TCR) MCL 3 2005

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 1 of 56 samples detected PFAS.

Contaminant Date Result MRL Status
8:2 FTS 4/22/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
lithium 4/22/2025 25.8000 µg/L 9 µg/L Detected
NMeFOSAA 4/22/2025 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 4/22/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 4/22/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 4/22/2025 <0.008 µg/L 0.008 µg/L Not Detected
4:2 FTS 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 4/22/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 4/22/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 4/22/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 4/22/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 4/22/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 4/22/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 4/22/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 4/22/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 4/22/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 4/22/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFEESA 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 4/22/2025 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 4/22/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFMBA 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 10/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFEESA 10/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 10/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 10/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 10/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 10/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 10/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 10/15/2025 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 10/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 10/15/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 10/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 10/15/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFDA 10/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 10/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 10/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 10/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpA 10/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 10/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 10/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 10/15/2025 <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 HARRIS COUNTY MUD 354.

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 TX1012965 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 HARRIS COUNTY MUD 354 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
2016 Lead and Copper Rule TT 9 SDWIS / TX1012965 / 5000
2016 Lead and Copper Rule MR 6 SDWIS / TX1012965 / 5000
2016 Public Notice Other 5 SDWIS / TX1012965 / 7500
2005 Coliform (TCR) MCL 3 SDWIS / TX1012965 / 3100

How HARRIS COUNTY MUD 354 Compares

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

Metric HARRIS COUNTY MUD 354 Texas avg Federal benchmark
Total violations 23 101.5 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 12 22.2 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 93.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 6,588 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 HARRIS COUNTY MUD 354 water safe to drink? ▼
HARRIS COUNTY MUD 354 (PWS ID: TX1012965) has 23 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 6,588 people using Groundwater sources.
How many people does HARRIS COUNTY MUD 354 serve? ▼
HARRIS COUNTY MUD 354 serves 6,588 people in HOUSTON, Texas. It is a Local-owned system using Groundwater water sources with 2,196 service connections.
What type of violations does HARRIS COUNTY MUD 354 have? ▼
HARRIS COUNTY MUD 354 has 23 total violations: 12 health-based violations (MCL exceedances or treatment failures), 6 monitoring/reporting violations, and 9 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in HARRIS COUNTY MUD 354 water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in HARRIS COUNTY MUD 354's water supply: lithium. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does HARRIS COUNTY MUD 354 use? ▼
HARRIS COUNTY MUD 354 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 PlainWater Editorial