MONTGOMERY COUNTY MUD 9

HOUSTON, TX · ~5,949 people served

Check your exact address → HOUSTON overview

100

Excellent

PurityRadar safety score

PWSID

TX1700220

State

Texas

City

HOUSTON

Population served

5,949

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 2023). Levels in parts per trillion (ppt).

Lithium

72,300 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Other · EPA contaminant 7500 began Dec 2016 Unaddressed

Monitoring & reporting · Nitrate began Jan 2015 Resolved

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

Other · EPA contaminant 7500 began Jul 2008 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jan 2008 Resolved

Recent enforcement actions

State action · SIA Feb 2017
State action · SOX Oct 2016
State action · SIA Sep 2016
State action · SIE Sep 2016
State action · SOX Apr 2015
State action · SIA Feb 2015
State action · SIE Jun 2008
State action · SIA Jun 2008

This profile is built from EPA public records for system TX1700220 — 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.