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Water system · PWSID TX1011809

HARRIS COUNTY MUD 189

HOUSTON, TX · ~6,906 people served

Check your exact address → HOUSTON overview
100
Excellent
PurityRadar safety score

PWSID

TX1011809

State

Texas

City

HOUSTON

Population served

6,906

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Apr 2025). Levels in parts per trillion (ppt).

Lithium

14,700 ppt

limit —

No federal limit

Violations & enforcement

19

Violations on record

0

Unaddressed

5

Health-based

39

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Oct 2016. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2015 Resolved
Other · EPA contaminant 7500 began Feb 2015 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2014 Resolved
Other · EPA contaminant 7500 began Sep 2014 Resolved
Max contaminant level (MCL) · Gross alpha health-based began Apr 2014 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2013 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2012 Resolved
Monitoring & reporting · Gross alpha began Oct 2010 Resolved
Monitoring & reporting · Uranium began Oct 2010 Resolved
Monitoring & reporting · Combined radium-226/228 began Oct 2010 Resolved
Monitoring & reporting · Combined radium-226/228 began Jul 2010 Resolved
Monitoring & reporting · Gross alpha began Jul 2010 Resolved

Recent enforcement actions

  • State action · SOX Oct 2016
  • State action · SIF Dec 2015
  • State action · SOX Dec 2015
  • State action · SIA Nov 2015
  • State action · SIE Nov 2015
  • State action · SOX Oct 2015
  • State action · SOX Apr 2015
  • State action · SOX Mar 2015

This profile is built from EPA public records for system TX1011809 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.