DIAMOND WOODS ESTATES MHP

PORT JEFFERSON, NY · ~150 people served

Check your exact address → PORT JEFFERSON overview

100

Excellent

PurityRadar safety score

PWSID

NY4121420

State

New York

City

PORT JEFFERSON

Population served

150

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

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 Jul 2022. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2017 Unaddressed

Monitoring & reporting · Lead & Copper Rule began Oct 2021 Resolved

Other · EPA contaminant 7000 began Jan 2021 Resolved

Other began Aug 2013 Resolved

Treatment technique · EPA contaminant 0400 health-based began Jan 2008 Resolved

Monitoring & reporting · Total coliform began Jan 2007 Resolved

Monitoring & reporting · Nitrate began Jan 2007 Resolved

Monitoring & reporting · Total coliform began Oct 2006 Resolved

Monitoring & reporting · Total coliform began Apr 2006 Resolved

Monitoring & reporting · Total coliform began Jul 2005 Resolved

Monitoring & reporting · Nitrate began Jan 2005 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jul 2004 Resolved

Recent enforcement actions

State action · SII Jul 2022
State action · SFJ Jul 2022
State action · SOX Jul 2022
State action · SOX Feb 2022
State action · SFJ Feb 2021
State action · SFJ Feb 2017
State action · SOX Sep 2014
State action · SOX Sep 2013

This profile is built from EPA public records for system NY4121420 — 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.