HARRIS COUNTY WCID 74

HOUSTON, TX · ~5,886 people served

Check your exact address → HOUSTON overview

100

Excellent

PurityRadar safety score

PWSID

TX1010480

State

Texas

City

HOUSTON

Population served

5,886

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

Lithium

19,300 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2022. Official EPA record →

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

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

Recent enforcement actions

State action · SOX Dec 2022
State action · SOX May 2014
State action · SOX Jun 1993
EPA/federal action · EFJ Apr 1991
State action · SFJ Jan 1991
State action · SFT Dec 1990
State action · SFJ Mar 1990
State action · SIF Mar 1982

This profile is built from EPA public records for system TX1010480 — 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.