HARRIS COUNTY MUD 257

HOUSTON, TX · ~3,501 people served

Check your exact address → HOUSTON overview

100

Excellent

PurityRadar safety score

PWSID

TX1012985

State

Texas

City

HOUSTON

Population served

3,501

Primary source

SWP

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

PFBA

5.6 ppt

limit —

No federal limit

PFHxA

3.2 ppt

limit —

No federal limit

PFPeA

3 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2025. Official EPA record →

Monitoring · Lead & Copper Rule began Aug 2024 Resolved

Monitoring & reporting · Lead & Copper Rule began Apr 2016 Resolved

Monitoring & reporting · Lead & Copper Rule began Dec 2014 Resolved

Monitoring & reporting · Nitrate began Jan 2009 Resolved

Recent enforcement actions

State action · SIF Jun 2025
State action · SOX Oct 2024
State action · SIA Oct 2024
State action · SIE Oct 2024
State action · SOX Sep 2016
State action · SIF Aug 2016
State action · SIA Apr 2016
State action · SIE Apr 2016

This profile is built from EPA public records for system TX1012985 — 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.