FOSS RESERVOIR MCD

FOSS, OK · ~12 people served

Check your exact address → FOSS overview

100

Excellent

PurityRadar safety score

PWSID

OK1010829

State

Oklahoma

City

FOSS

Population served

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

No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jan 2023. Official EPA record →

Monitoring & reporting · EPA contaminant 0300 began Feb 2021 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Dec 2013 Resolved

Monitoring & reporting · Total trihalomethanes (TTHM) began Dec 2013 Resolved

Treatment technique · Bromate health-based began Jul 2013 Resolved

Treatment technique · Bromate health-based began Apr 2013 Resolved

Treatment technique · Bromate health-based began Jan 2013 Resolved

Treatment technique · Bromate health-based began Oct 2012 Resolved

Treatment technique · Bromate health-based began Jul 2012 Resolved

Treatment technique · Bromate health-based began Apr 2012 Resolved

Treatment technique · Bromate health-based began Jan 2012 Resolved

Treatment technique · EPA contaminant 0300 health-based began Jul 2008 Resolved

Recent enforcement actions

State action · SOX Jan 2023
State action · SOX Mar 2015
State action · SOX Mar 2015
State action · SOX Mar 2015
State action · SOX Mar 2015
State action · SOX Mar 2015
State action · SOX Mar 2015
State action · SOX Mar 2015

This profile is built from EPA public records for system OK1010829 — 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.