WEST HARRIS COUNTY MUD 11

HOUSTON, TX · ~8,205 people served

Check your exact address → HOUSTON overview

100

Excellent

PurityRadar safety score

PWSID

TX1012858

State

Texas

City

HOUSTON

Population served

8,205

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 Jun 2025). Levels in parts per trillion (ppt).

Lithium

34,900 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2015. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2013 Resolved

Max contaminant level (MCL) · Arsenic health-based began Jul 2013 Resolved

Monitoring & reporting · Lead & Copper Rule began Oct 2011 Resolved

Max contaminant level (MCL) · Arsenic health-based began Jan 2010 Resolved

Recent enforcement actions

State action · SOX Jul 2015
State action · SOX Jul 2014
State action · SIF Oct 2013
State action · SIE Sep 2013
State action · SIA Sep 2013
State action · SOX Apr 2011
State action · SIF May 2010
State action · SIE Mar 2010

This profile is built from EPA public records for system TX1012858 — 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.