NORTHWEST HARRIS COUNTY MUD 19

HOUSTON, TX · ~5,535 people served

Check your exact address → HOUSTON overview

100

Excellent

PurityRadar safety score

PWSID

TX1011927

State

Texas

City

HOUSTON

Population served

5,535

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

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Oct 2023. Official EPA record →

Monitoring · Lead & Copper Rule began Jun 2023 Resolved

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

Monitoring & reporting · Lead & Copper Rule began Oct 2012 Resolved

Other · EPA contaminant 7500 began Apr 2010 Resolved

Monitoring & reporting · Total coliform began Dec 2009 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jul 2005 Resolved

Other · EPA contaminant 7500 began May 2004 Resolved

Monitoring & reporting · Total coliform began Jan 2004 Resolved

Recent enforcement actions

State action · SIF Oct 2023
State action · SOX Oct 2023
State action · SIF Oct 2023
State action · SOX Aug 2023
State action · SIA Jul 2023
State action · SIE Jul 2023
State action · SOX Aug 2015
State action · SOX Oct 2014

This profile is built from EPA public records for system TX1011927 — 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.