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HARRIS COUNTY MUD 389

PWS ID: TX1013265 · HOUSTON, Texas 77056-3078

HARRIS COUNTY MUD 389 serves 2,676 people in HOUSTON, Texas using Groundwater water sources. It has 115 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: HARRIS COUNTY MUD 389

HARRIS COUNTY MUD 389 is a local-owned community water system that delivers drinking water to 2,676 residents in HOUSTON, Texas (Harris County) through 892 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 115 total violations for this system , of which 0 (0%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 109 monitoring and reporting violations are on file. The most recent violation on record dates to 2020.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 16 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

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 389's 115 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.

Population Served
2,676
Total Violations
115
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
892
County
Harris
School/Daycare
No
MCL Violations
0
Monitoring Violations
109
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 16 2003
Lead and Copper Rule MR 5 2014
Public Notice Other 4 2014
Nitrate MR 4 2020
1,2,4-Trichlorobenzene MR 4 2020
Xylenes, Total MR 4 2020
o-Dichlorobenzene MR 4 2020
p-Dichlorobenzene MR 4 2020
Vinyl chloride MR 4 2020
1,1-Dichloroethylene MR 4 2020
trans-1,2-Dichloroethylene MR 4 2020
1,2-Dichloroethane MR 4 2020
Carbon tetrachloride MR 4 2020
Trichloroethylene MR 4 2020
CHLOROBENZENE MR 4 2020
Benzene MR 4 2020
1,1,1-Trichloroethane MR 4 2020
1,2-Dichloropropane MR 4 2020
Styrene MR 4 2020
Ethylbenzene MR 4 2020
DICHLOROMETHANE MR 4 2020
1,1,2-Trichloroethane MR 4 2020
cis-1,2-Dichloroethylene MR 4 2020
Tetrachloroethylene MR 4 2020
Toluene MR 4 2020
Consumer Confidence Rule Other 2 2016

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 389.

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 TX1013265 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 389 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
2020 Nitrate MR 4 SDWIS / TX1013265 / 1040
2020 1,2,4-Trichlorobenzene MR 4 SDWIS / TX1013265 / 2378
2020 Xylenes, Total MR 4 SDWIS / TX1013265 / 2955
2020 o-Dichlorobenzene MR 4 SDWIS / TX1013265 / 2968
2020 p-Dichlorobenzene MR 4 SDWIS / TX1013265 / 2969
2020 Vinyl chloride MR 4 SDWIS / TX1013265 / 2976
2020 1,1-Dichloroethylene MR 4 SDWIS / TX1013265 / 2977
2020 trans-1,2-Dichloroethylene MR 4 SDWIS / TX1013265 / 2979
2020 1,2-Dichloroethane MR 4 SDWIS / TX1013265 / 2980
2020 Carbon tetrachloride MR 4 SDWIS / TX1013265 / 2982
2020 Trichloroethylene MR 4 SDWIS / TX1013265 / 2984
2020 CHLOROBENZENE MR 4 SDWIS / TX1013265 / 2989
2020 Benzene MR 4 SDWIS / TX1013265 / 2990
2020 1,1,1-Trichloroethane MR 4 SDWIS / TX1013265 / 2981
2020 1,2-Dichloropropane MR 4 SDWIS / TX1013265 / 2983

How HARRIS COUNTY MUD 389 Compares

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

Metric HARRIS COUNTY MUD 389 Texas avg Federal benchmark
Total violations 115 101.5 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 0 22.2 Indicates a contaminant exceeded a federal MCL
PFAS detection None 93.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 2,676 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 389 water safe to drink? ▼
HARRIS COUNTY MUD 389 (PWS ID: TX1013265) has 115 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,676 people using Groundwater sources.
How many people does HARRIS COUNTY MUD 389 serve? ▼
HARRIS COUNTY MUD 389 serves 2,676 people in HOUSTON, Texas. It is a Local-owned system using Groundwater water sources with 892 service connections.
What type of violations does HARRIS COUNTY MUD 389 have? ▼
HARRIS COUNTY MUD 389 has 115 total violations: 0 health-based violations (MCL exceedances or treatment failures), 109 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in HARRIS COUNTY MUD 389 water? ▼
No PFAS testing data is available for HARRIS COUNTY MUD 389 under the EPA's UCMR5 monitoring program.
What water source does HARRIS COUNTY MUD 389 use? ▼
HARRIS COUNTY MUD 389 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. This data is provided for informational purposes only.

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

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