ENID

ENID, OK · ~49,347 people served

Check your exact address → ENID overview

100

Excellent

PurityRadar safety score

PWSID

OK2002412

State

Oklahoma

City

ENID

Population served

49,347

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

Lithium

23,100 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

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

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

Reporting · EPA contaminant 5200 began Oct 2024 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2024 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2024 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Sep 2021 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Sep 2021 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Sep 2019 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Sep 2019 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Sep 2018 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Sep 2018 Resolved

Max contaminant level (MCL) · Total coliform health-based began May 2013 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2010 Resolved

Recent enforcement actions

State action · SOX Sep 2025
State action · SOX Jul 2025
State action · SOX Jul 2025
State action · SIA Jul 2025
State action · SIA Jul 2025
State action · SIF Jun 2025
State action · SIE Oct 2024
State action · SIA Oct 2024

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

1 station · latest May 2024

0.549 · max 2.52 mg/L · 19

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system OK2002412 — 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.