HARRIS COUNTY MUD 64

HOUSTON, TX · ~6,726 people served

Check your exact address → HOUSTON overview

100

Excellent

PurityRadar safety score

PWSID

TX1011513

State

Texas

City

HOUSTON

Population served

6,726

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

Lithium

33,600 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 →

Other · EPA contaminant 7500 began Feb 2003 Resolved

Monitoring & reporting · Total coliform began Oct 2002 Resolved

Recent enforcement actions

State action · SOX Aug 2015
State action · SOX Jan 2011
State action · SIA Jan 2003
State action · SIA Nov 2002
State action · SIE Nov 2002
State action · SFJ Oct 1990
State action · SFJ Apr 1987
State action · SIF Aug 1983

This profile is built from EPA public records for system TX1011513 — 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.