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Water system · PWSID CT0930011

REGIONAL WATER AUTHORITY

NEW HAVEN, CT · ~418,900 people served

Check your exact address → NEW HAVEN overview
80
Good
PurityRadar safety score

PWSID

CT0930011

State

Connecticut

City

NEW HAVEN

Population served

418,900

Primary source

Surface water

Score history

▼ 20 points — the score moved from 100 to 80 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 80

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

PFOA

Perfluorooctanoic acid

4.3 ppt

limit 4 ppt

Above EPA limit · 1.1×

PFOS

Perfluorooctanesulfonic acid

4.3 ppt

limit 4 ppt

Above EPA limit · 1.1×

PFBS

3.5 ppt

limit —

No federal limit

PFPeA

3.1 ppt

limit —

No federal limit

Violations & enforcement

30

Violations on record

0

Unaddressed

0

Health-based

17

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement May 2021. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Dec 2020 Resolved
Other · EPA contaminant 7000 began Aug 2015 Resolved
Monitoring & reporting · EPA contaminant 2981 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2378 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2380 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2964 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2969 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2968 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2976 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2977 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2979 began Jan 2015 Resolved
Monitoring & reporting · EPA contaminant 2980 began Jan 2015 Resolved

Recent enforcement actions

  • State action · SOX May 2021
  • State action · SOX May 2017
  • State action · SOX Apr 2017
  • State action · SIA Apr 2017
  • State action · SIA Apr 2016
  • State action · SOX Apr 2016
  • State action · SIA Apr 2016
  • State action · SIA Apr 2016

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

10 stations · latest Oct 2023

2.35 · max 9.96 mg/l asNO3 · 278

Manganese

6 stations · latest Sep 2023

64.2 · max 621 ug/l · 131

Copper

6 stations · latest Sep 2023

10.5 · max 128 ug/l · 130

Lead

6 stations · latest Sep 2023

2.34 · max 92.8 ug/l · 130

Arsenic

4 stations · latest Jun 2023

0.8 · max 3.5 ug/l · 71

Fluoride

2 stations · latest Sep 2023

0.11 · max 0.47 mg/l · 60

Uranium

2 stations · latest Sep 2023

0.071 · max 0.36 ug/l · 59

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 CT0930011 — 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.