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City water profile

East Haven water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for East Haven, Connecticut.

Median indexed hardness

57PPM

One indexed ZIP

Range 56.5–56.5 PPM

State comparison
4 PPM above
State hardness rank
#26 of 52
Matched utilities
1
Active health records
0

City summary

What the indexed records say

East Haven has 1 published ZIP profile across New Haven County. The indexed median is 57 PPM, compared with 53 PPM across Connecticut.

Among the 52 Connecticutcities with an indexed median, East Haven ranks #26from highest to lowest. Across all 98 state ZIP profiles, available estimates run from 42.8to 114 PPM.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community.

Hardness distribution

How local ZIP estimates compare

Soft1 ZIP
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard0 ZIPs

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
9.9 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jan 4, 2016 to Jun 4, 2026.

ZIP directory

Water reports in East Haven

Open a ZIP for site-level provenance and measurements.

ZIP code

06512

Soft

56.5 PPM

Nearest site
9.9 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Regional Water Authority

PWSID CT0930011

Surface water
System population served
418,900
Last reported
Jun 29, 2026

The system names this served city; Census place overlap links the city to this ZCTA.

Compliance history

What EPA records show

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

No violation records are included in the current lookback window.

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in East Haven

Is the water hard?

The indexed city median is 57 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.