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Community Water System · PWS TX0570176

Lancaster MUD 1

Katy, Texas 77449-1964 - drinking water served from surface water sources to 2,685 people, tracked in EPA SDWIS and UCMR5.

2,685
People served
47
EPA violations
11
Health-based
Untested
UCMR5 result

The verdict

EPA records 47 drinking-water violations at Lancaster MUD 1, 23% of them health-based - below the Texas per-system average.

47
Total EPA violations on record
23%
Health-based (MCL / treatment failure)
2,685
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Lancaster MUD 1

Lancaster MUD 1 is a local-owned community water system that delivers drinking water to 2,685 residents in Katy, Texas (Dallas County) through 895 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 47 total violations for this system , of which 11 (23%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 24 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 Public Notice, recorded in 12 violations (Other). 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. Statewide, 1,068 of 1,147 UCMR5-tested systems have reported PFAS detections (93.1%).

Lancaster MUD 1's 47 violations sit below the Texas average.

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
2,685
Total Violations
47
Health-Based Violations
11
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
895
County
Dallas
School/Daycare
No
MCL Violations
8
Monitoring Violations
24
Treatment Tech Violations
3

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Public Notice Other 12 2016
TTHM MR 9 2013
Total Haloacetic Acids (HAA5) MR 9 2013
Coliform (TCR) MCL 8 2008
Coliform (TCR) MR 4 2009
Revised Total Coliform Rule TT 3 2016
Lead and Copper Rule MR 2 2013

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 Lancaster MUD 1.

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 TX0570176 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 Lancaster MUD 1 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 Public Notice Other 12 SDWIS / TX0570176 / 7500
2016 Revised Total Coliform Rule TT 3 SDWIS / TX0570176 / 8000
2013 TTHM MR 9 SDWIS / TX0570176 / 2950
2013 Total Haloacetic Acids (HAA5) MR 9 SDWIS / TX0570176 / 2456
2013 Lead and Copper Rule MR 2 SDWIS / TX0570176 / 5000
2009 Coliform (TCR) MR 4 SDWIS / TX0570176 / 3100
2008 Coliform (TCR) MCL 8 SDWIS / TX0570176 / 3100

How Lancaster MUD 1 Compares

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

Metric Lancaster MUD 1 Texas avg Federal benchmark
Total violations 47 101.5 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 11 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 2,685 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 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Lancaster MUD 1 water safe to drink? ▼
Lancaster MUD 1 (PWS ID: TX0570176) has 47 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,685 people using Surface Water sources.
How many people does Lancaster MUD 1 serve? ▼
Lancaster MUD 1 serves 2,685 people in Katy, Texas. It is a Local-owned system using Surface Water water sources with 895 service connections.
What type of violations does Lancaster MUD 1 have? ▼
Lancaster MUD 1 has 47 total violations: 11 health-based violations (MCL exceedances or treatment failures), 24 monitoring/reporting violations, and 3 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Lancaster MUD 1 water? ▼
No PFAS testing data is available for Lancaster MUD 1 under the EPA's UCMR5 monitoring program.
What water source does Lancaster MUD 1 use? ▼
Lancaster MUD 1 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.
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.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.