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Water system · PWSID NY5903451

OSSINING WATER DEPARTMENT

OSSINING, NY · ~30,000 people served

Check your exact address → OSSINING overview
90
Excellent
PurityRadar safety score

PWSID

NY5903451

State

New York

City

OSSINING

Population served

30,000

Primary source

Surface water

Score history

▼ 10 points — the score moved from 100 to 90 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 90

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

PFOA

Perfluorooctanoic acid

4.3 ppt

limit 4 ppt

Above EPA limit · 1.1×

Violations & enforcement

87

Violations on record

0

Unaddressed

3

Health-based

39

Enforcement actions

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

Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2022 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2022 Resolved
Monitoring & reporting · EPA contaminant 2039 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2020 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2036 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2037 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2031 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2005 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2010 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2015 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2035 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2040 began Jan 2015 Resolved

Recent enforcement actions

  • State action · SOX Jun 2025
  • State action · SIF May 2025
  • State action · SFJ Feb 2025
  • State action · SIE Feb 2025
  • State action · SOX Aug 2024
  • State action · SIF May 2023
  • State action · SFJ Jul 2022
  • State action · SIE Jul 2022

This profile is built from EPA public records for system NY5903451 — 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.