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Water system · PWSID TX1010379

MASON CREEK UTILITY DISTRICT

KATY, TX · ~8,900 people served

Check your exact address → KATY overview
100
Excellent
PurityRadar safety score

PWSID

TX1010379

State

Texas

City

KATY

Population served

8,900

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

Lithium

29,600 ppt

limit —

No federal limit

Violations & enforcement

23

Violations on record

0

Unaddressed

0

Health-based

51

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Mar 2020. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Dec 2019 Resolved
Monitoring & reporting · EPA contaminant 0999 began Apr 2017 Resolved
Other · EPA contaminant 7500 began Feb 2016 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2015 Resolved
Other · EPA contaminant 7500 began Feb 2014 Resolved
Monitoring & reporting · Lead & Copper Rule began Dec 2013 Resolved
Monitoring & reporting · EPA contaminant 0999 began Oct 2013 Resolved
Monitoring & reporting · EPA contaminant 0999 began Apr 2013 Resolved
Monitoring & reporting · Nitrate began Jan 2011 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jan 2007 Resolved
Monitoring & reporting · EPA contaminant 0999 began Oct 2006 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2006 Resolved

Recent enforcement actions

  • State action · SOX Mar 2020
  • State action · SIA Mar 2020
  • State action · SIF Dec 2017
  • State action · SIE Oct 2017
  • State action · SIA Oct 2017
  • State action · SOX Oct 2017
  • State action · SOX Oct 2016
  • State action · SIA Mar 2016

This profile is built from EPA public records for system TX1010379 — 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.