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Water system · PWSID NJ0233001

MAHWAH WATER DEPARTMENT

MAHWAH, NJ · ~26,777 people served

Check your exact address → MAHWAH overview

Fair

PurityRadar safety score

PWSID

NJ0233001

State

New Jersey

City

MAHWAH

Population served

26,777

Primary source

Surface water

Score history

▼ 42 points — the score moved from 100 to 58 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 58

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

PFOA

Perfluorooctanoic acid

13 ppt

limit 4 ppt

Above EPA limit · 3.1×

PFOS

Perfluorooctanesulfonic acid

4.1 ppt

limit 4 ppt

Above EPA limit · 1.0×

Lithium

33,100 ppt

limit —

No federal limit

PFHxA

6.1 ppt

limit —

No federal limit

PFPeA

6.1 ppt

limit —

No federal limit

PFBA

6 ppt

limit —

No federal limit

PFBS

4.1 ppt

limit —

No federal limit

PFHpA

3.9 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

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

Monitoring & reporting · EPA contaminant 2981 began Jan 2023 Resolved

Monitoring & reporting · EPA contaminant 2976 began Jan 2023 Resolved

Monitoring & reporting · EPA contaminant 2977 began Jan 2023 Resolved

Monitoring & reporting · EPA contaminant 2980 began Jan 2023 Resolved

Monitoring & reporting · EPA contaminant 2969 began Jan 2023 Resolved

Monitoring & reporting · EPA contaminant 2955 began Jan 2023 Resolved

Monitoring & reporting · EPA contaminant 2380 began Jan 2023 Resolved

Monitoring & reporting · EPA contaminant 2968 began Jan 2023 Resolved

Monitoring & reporting · EPA contaminant 2964 began Jan 2023 Resolved

Monitoring & reporting · EPA contaminant 2979 began Jan 2023 Resolved

Monitoring & reporting · EPA contaminant 2378 began Jan 2023 Resolved

Monitoring & reporting · EPA contaminant 2982 began Jan 2023 Resolved

Recent enforcement actions

State action · SFJ Aug 2025
State action · SIE Aug 2025
State action · SOX Jul 2025
State action · SFJ Feb 2021
State action · SOX Dec 2020
State action · SFJ Sep 2020
State action · SIE Sep 2020
State action · SOX Jul 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

Fluoride

1 station · latest Sep 2023

0.08 · max 0.09 mg/l · 15

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 NJ0233001 — 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.