HARRIS COUNTY MUD 81

HOUSTON, TX · ~11,514 people served

Check your exact address → HOUSTON overview

100

Excellent

PurityRadar safety score

PWSID

TX1010581

State

Texas

City

HOUSTON

Population served

11,514

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

Lithium

21,300 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Nov 2013. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2010 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1992 Resolved

Recent enforcement actions

State action · SOX Nov 2013
State action · SOX Jun 1993
State action · SIF Jan 1982
State action · SIF Aug 1981
EPA/federal action · EFJ Sep 1980
EPA/federal action · EFJ Aug 1980
EPA/federal action · EFJ Jul 1980

This profile is built from EPA public records for system TX1010581 — 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.