MONTGOMERY COUNTY UD 4

HOUSTON, TX · ~4,980 people served

Check your exact address → HOUSTON overview

100

Excellent

PurityRadar safety score

PWSID

TX1700286

State

Texas

City

HOUSTON

Population served

4,980

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

Lithium

26,000 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2017. Official EPA record →

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

Recent enforcement actions

State action · SOX Jan 2017
State action · SIA Jan 2017
State action · SFJ Aug 1991
EPA/federal action · EFJ May 1991
State action · SFJ Dec 1990
State action · SFJ Nov 1990

This profile is built from EPA public records for system TX1700286 — 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.