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Water system · PWSID NY5103705

RIVERHEAD WATER DISTRICT

RIVERHEAD, NY · ~35,000 people served

Check your exact address → RIVERHEAD overview

Good

PurityRadar safety score

PWSID

NY5103705

State

New York

City

RIVERHEAD

Population served

35,000

Primary source

Groundwater

Score history

▼ 23 points — the score moved from 100 to 77 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 77

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 Jun 2023). Levels in parts per trillion (ppt).

PFOS

Perfluorooctanesulfonic acid

5.2 ppt

limit 4 ppt

Above EPA limit · 1.3×

PFOA

Perfluorooctanoic acid

4 ppt

limit 4 ppt

Near EPA limit

PFHxA

3.3 ppt

limit —

No federal limit

PFPeA

3.2 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement May 2024. Official EPA record →

Monitoring & reporting · Thallium began Jul 2023 Resolved

Max contaminant level (MCL) · Nitrite health-based began Jul 2023 Resolved

Monitoring & reporting · EPA contaminant 2964 began Jul 2010 Resolved

Monitoring & reporting · EPA contaminant 2969 began Jul 2010 Resolved

Monitoring & reporting · EPA contaminant 2976 began Jul 2010 Resolved

Monitoring & reporting · EPA contaminant 2977 began Jul 2010 Resolved

Monitoring & reporting · EPA contaminant 2980 began Jul 2010 Resolved

Monitoring & reporting · EPA contaminant 2979 began Jul 2010 Resolved

Monitoring & reporting · EPA contaminant 2981 began Jul 2010 Resolved

Monitoring & reporting · EPA contaminant 2982 began Jul 2010 Resolved

Monitoring & reporting · EPA contaminant 2983 began Jul 2010 Resolved

Monitoring & reporting · EPA contaminant 2968 began Jul 2010 Resolved

Recent enforcement actions

State action · SOX May 2024
State action · SIE Sep 2023
State action · SFJ Sep 2023
State action · SFJ Sep 2023
State action · SIE Sep 2023
State action · SOX Sep 2023
State action · SOX May 2023
State action · SFJ Aug 2022

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

Atrazine

1 station · latest Aug 2023

2.15 · max 167 ng/l · 4

Nitrate

2 stations · latest May 2023

12.4 · max 12.6 mg/l as N · 4

Manganese

3 stations · latest Jun 2022

178 · max 604 ug/l · 3

Fluoride

2 stations · latest Jun 2022

0.025 · max 0.03 mg/l · 2

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 NY5103705 — 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.