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City water profile

Portland water quality

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

Median indexed hardness

45PPM

One indexed ZIP

Range 45.1–45.1 PPM

State comparison
8 PPM below
State hardness rank
#47 of 52
Matched utilities
4
Active health records
1

City summary

What the indexed records say

Portland has 1 published ZIP profile across Middlesex County. The indexed median is 45 PPM, compared with 53 PPM across Connecticut.

Among the 52 Connecticutcities with an indexed median, Portland ranks #47from 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
6.5 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 Portland

Open a ZIP for site-level provenance and measurements.

ZIP code

06480

Soft

45.1 PPM

Nearest site
6.5 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Metropolitan District Commission

PWSID CT0640011

Surface water
System population served
390,887
Last reported
Jun 29, 2026

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

Portland Water Department

PWSID CT1130011

Surface water
System population served
5,010
Last reported
Jun 29, 2026

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

Solano Inn Llc

PWSID CT1130064

Groundwater
System population served
96
Last reported
Jun 29, 2026

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

Ctwc - Rivercrest Division

PWSID CT1130021

Groundwater
System population served
88
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

1 unique active health-based record appears among associated systems. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Lead and Copper RuleCT1130011Dec 30, 2025Resolved
Interim Enhanced Surface Water Treatment RuleCT0640011Jun 1, 2025Resolved
Lead and Copper RuleCT1130064Dec 30, 2024Resolved
LEAD AND COPPER RULE REVISIONSCT1130064Oct 17, 2024Unaddressed
LEAD AND COPPER RULE REVISIONSCT1130064Oct 17, 2024Unaddressed · health-based
Lead and Copper RuleCT1130011Dec 30, 2022Resolved
Consumer Confidence RuleCT1130064Aug 10, 2022Resolved
Consumer Confidence RuleCT1130064Aug 10, 2021Resolved

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 Portland

Is the water hard?

The indexed city median is 45 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.