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Water system · PWSID OK1021101

BLACKWELL MUNICIPAL AUTHORITY

BLACKWELL, OK · ~7,668 people served

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

PWSID

OK1021101

State

Oklahoma

City

BLACKWELL

Population served

7,668

Primary source

Surface water

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

Lithium

14,000 ppt

limit —

No federal limit

Violations & enforcement

66

Violations on record

0

Unaddressed

40

Health-based

157

Enforcement actions

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

Monitoring & reporting · EPA contaminant 1008 began May 2025 Resolved
Monitoring & reporting · EPA contaminant 0300 began May 2025 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2025 Resolved
Treatment technique · EPA contaminant 0300 health-based began Jan 2025 Resolved
Treatment technique · EPA contaminant 0300 health-based began Jun 2024 Resolved
Treatment technique · EPA contaminant 0300 health-based began Mar 2024 Resolved
Treatment technique · EPA contaminant 0300 health-based began Mar 2024 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Jan 2023 Resolved
Max contaminant level (MCL) · Total trihalomethanes (TTHM) health-based began Oct 2022 Resolved
Treatment technique · EPA contaminant 0200 health-based began Sep 2022 Resolved
Treatment technique · EPA contaminant 0300 health-based began May 2021 Resolved
Monitoring & reporting · EPA contaminant 1009 began Aug 2020 Resolved

Recent enforcement actions

  • State action · SOX Oct 2025
  • State action · SOX Oct 2025
  • State action · SIE Jul 2025
  • State action · SIA Jul 2025
  • State action · SOX Jun 2025
  • State action · SIF Jun 2025
  • State action · SOX Jun 2025
  • State action · SIA Jun 2025

This profile is built from EPA public records for system OK1021101 — 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.