NORTHWEST HARRIS COUNTY MUD 12

HOUSTON, TX · ~7,839 people served

Check your exact address → HOUSTON overview

100

Excellent

PurityRadar safety score

PWSID

TX1011901

State

Texas

City

HOUSTON

Population served

7,839

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 Oct 2023). Levels in parts per trillion (ppt).

Lithium

15,300 ppt

limit —

No federal limit

PFPeA

5 ppt

limit —

No federal limit

PFHxA

3.6 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2010. Official EPA record →

Monitoring & reporting · EPA contaminant 0999 began Oct 2008 Resolved

Other · EPA contaminant 7000 began Jul 2005 Resolved

Other · EPA contaminant 7000 began Jan 2004 Resolved

Recent enforcement actions

State action · SOX Jul 2010
State action · SO8 Aug 2009
State action · SIE Mar 2009
State action · SIA Mar 2009
State action · SOX Jun 2007
State action · SIA Feb 2006

This profile is built from EPA public records for system TX1011901 — 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.