NORTHWEST HARRIS COUNTY MUD 10

HOUSTON, TX · ~7,671 people served

Check your exact address → HOUSTON overview

100

Excellent

PurityRadar safety score

PWSID

TX1011649

State

Texas

City

HOUSTON

Population served

7,671

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

Lithium

22,000 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Monitoring & reporting · Lead & Copper Rule began Dec 2014 Resolved

Other · EPA contaminant 7500 began Aug 2003 Resolved

Other · EPA contaminant 7500 began Jul 2003 Resolved

Other · EPA contaminant 7500 began Jun 2003 Resolved

Other · EPA contaminant 7500 began May 2003 Resolved

Monitoring & reporting · Total coliform began Apr 2003 Resolved

Monitoring & reporting · Total coliform began Mar 2003 Resolved

Monitoring & reporting · Total coliform began Feb 2003 Resolved

Monitoring & reporting · Total coliform began Jan 2003 Resolved

Recent enforcement actions

State action · SOX Aug 2015
State action · SOX Aug 2015
State action · SOX Aug 2015
State action · SOX Aug 2015
State action · SOX Mar 2015
State action · SIA Feb 2015
State action · SOX Jan 2011
State action · SIA Jul 2003

This profile is built from EPA public records for system TX1011649 — 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.