HARRIS COUNTY MUD 46

HOUSTON, TX · ~5,418 people served

Check your exact address → HOUSTON overview

100

Excellent

PurityRadar safety score

PWSID

TX1010903

State

Texas

City

HOUSTON

Population served

5,418

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

Lithium

15,800 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Other · EPA contaminant 7500 began May 2025 Resolved

Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Resolved

Reporting · EPA contaminant 5200 began Oct 2024 Resolved

Monitoring & reporting · EPA contaminant 0999 began Oct 2016 Resolved

Other · EPA contaminant 7500 began Jul 2016 Resolved

Monitoring & reporting · EPA contaminant 0999 began Oct 2015 Resolved

Recent enforcement actions

State action · SOX Jul 2025
State action · SIF Jul 2025
State action · SIF Jul 2025
State action · SIA Jun 2025
State action · SIA Jun 2025
State action · SOX Apr 2025
State action · SOX Apr 2025
State action · SOX Apr 2025

This profile is built from EPA public records for system TX1010903 — 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.