NORTHWEST HARRIS COUNTY MUD 20

HOUSTON, TX · ~3,429 people served

Check your exact address → HOUSTON overview

100

Excellent

PurityRadar safety score

PWSID

TX1011998

State

Texas

City

HOUSTON

Population served

3,429

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 Sep 2024). Levels in parts per trillion (ppt).

PFBA

11 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Oct 2005. Official EPA record →

Monitoring & reporting · Total coliform began Jun 2005 Resolved

Monitoring & reporting · Total coliform began May 2005 Resolved

Recent enforcement actions

State action · SIF Oct 2005
State action · SIF Sep 2005
State action · SIA Jul 2005
State action · SIE Jul 2005
State action · SOX Jun 2005
State action · SIE Jun 2005
State action · SIA Jun 2005
State action · SOX May 2005

This profile is built from EPA public records for system TX1011998 — 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.