NORTHWEST HARRIS COUNTY MUD 23

HOUSTON, TX · ~4,470 people served

Check your exact address → HOUSTON overview

100

Excellent

PurityRadar safety score

PWSID

TX1011746

State

Texas

City

HOUSTON

Population served

4,470

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 Jan 2023 Resolved

Monitoring · Lead & Copper Rule began Jan 2022 Resolved

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

Other · EPA contaminant 7500 began Dec 2008 Resolved

Max contaminant level (MCL) · Total coliform health-based began Sep 2008 Resolved

Monitoring & reporting · Total coliform began Sep 2006 Resolved

Recent enforcement actions

State action · SIF Oct 2023
State action · SOX Mar 2023
State action · SIE Mar 2023
State action · SIA Mar 2023
State action · SIF Jan 2023
State action · SOX Mar 2022
State action · SIA Mar 2022
State action · SIE Mar 2022

This profile is built from EPA public records for system TX1011746 — 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.