Home/ Directory/ OK/ TRI-COUNTY RWD #2

Water system · PWSID OK2006362

TRI-COUNTY RWD #2

EARLSBORO, OK · ~5,172 people served

Check your exact address → EARLSBORO overview
67
Fair
PurityRadar safety score

PWSID

OK2006362

State

Oklahoma

City

EARLSBORO

Population served

5,172

Primary source

Groundwater

Score history

▼ 33 points — the score moved from 100 to 67 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 67

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 2025). Levels in parts per trillion (ppt).

PFHxS

Perfluorohexanesulfonic acid

22 ppt

limit 10 ppt

Above EPA limit · 2.2×

PFOS

Perfluorooctanesulfonic acid

4.1 ppt

limit 4 ppt

Above EPA limit · 1.0×

Lithium

17,000 ppt

limit —

No federal limit

Violations & enforcement

47

Violations on record

0

Unaddressed

4

Health-based

98

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 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 · Thallium began Apr 2024 Resolved
Monitoring & reporting · Thallium began Oct 2021 Resolved
Monitoring · Lead & Copper Rule began Sep 2021 Resolved
Monitoring & reporting · EPA contaminant 0999 began Jul 2021 Resolved
Monitoring & reporting · EPA contaminant 3014 began May 2017 Resolved
Other · EPA contaminant 7000 began Jul 2016 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 2013 Resolved
Monitoring & reporting · Total coliform began Jul 2013 Resolved
Monitoring & reporting · EPA contaminant 3014 began Jul 2013 Resolved
Other · EPA contaminant 7000 began Jul 2013 Resolved

Recent enforcement actions

  • State action · SOX Jul 2025
  • State action · SOX Jul 2025
  • State action · SIA Jul 2025
  • State action · SIA Jul 2025
  • State action · SOX Sep 2024
  • State action · SIA Aug 2024
  • State action · SIE Aug 2024
  • State action · SIF Apr 2023

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

Arsenic

2 stations · latest Jul 2024

5 · max 10 ug/L · 15

Copper

2 stations · latest Jul 2024

5 · max 5 ug/L · 15

Lead

2 stations · latest Jul 2024

10 · max 10 ug/L · 15

Nitrate

1 station · latest Mar 2025

0.095 · max 0.389 mg/L · 11

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 OK2006362 — 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.