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Water system · PWSID NY5110526

SUFFOLK COUNTY WATER AUTHORITY

HAUPPAUGE, NY · ~1,100,000 people served

Check your exact address → HAUPPAUGE overview

Good

PurityRadar safety score

PWSID

NY5110526

State

New York

City

HAUPPAUGE

Population served

1,100,000

Primary source

Groundwater

Score history

▼ 25 points — the score moved from 100 to 75 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 75

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

PFOS

Perfluorooctanesulfonic acid

5 ppt

limit 4 ppt

Above EPA limit · 1.3×

PFOA

Perfluorooctanoic acid

4.3 ppt

limit 4 ppt

Above EPA limit · 1.1×

PFNA

Perfluorononanoic acid

5.7 ppt

limit 10 ppt

Near EPA limit

PFHxS

Perfluorohexanesulfonic acid

3.1 ppt

limit 10 ppt

Below EPA limit

PFPeA

14 ppt

limit —

No federal limit

6:2 FTS

13 ppt

limit —

No federal limit

PFHxA

8.9 ppt

limit —

No federal limit

PFBA

5.6 ppt

limit —

No federal limit

PFBS

5.2 ppt

limit —

No federal limit

PFHpA

5 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Max contaminant level (MCL) · EPA contaminant 1094 health-based began Jul 2020 Resolved

Monitoring · Lead & Copper Rule began Aug 2018 Resolved

Monitoring & reporting · EPA contaminant 4030 began Jan 2008 Resolved

Max contaminant level (MCL) · Total coliform health-based began Sep 2006 Resolved

Max contaminant level (MCL) · Nitrate health-based began Jan 2002 Resolved

Recent enforcement actions

State action · SFJ Apr 2025
State action · SIE Apr 2025
State action · SIE Nov 2024
State action · SFJ Nov 2024
State action · SOX May 2023
State action · SIE Oct 2022
State action · SFJ Oct 2022
State action · SOX Sep 2020

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

Nitrate

20 stations · latest Jun 2023

1.73 · max 11.6 mg/l as N · 180

Manganese

15 stations · latest Jul 2023

88.5 · max 1,780 ug/l · 86

Fluoride

14 stations · latest Jul 2023

0.03 · max 0.1 mg/l · 85

Lead

8 stations · latest Jun 2023

0.122 · max 2.27 ug/l · 79

Arsenic

7 stations · latest Jun 2023

0.37 · max 1.1 ug/l · 71

Copper

8 stations · latest Jun 2023

0.565 · max 3.1 ug/l · 28

Atrazine

4 stations · latest Sep 2023

7.25 · max 9.95 ng/l · 6

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 NY5110526 — 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.