Is tap water safe in Cranston?

EPA SDWIS shows no active health-based violation in this profile's reporting window. That is not the same as proving every contaminant is absent, and federal data can lag state and utility records.

How hard is the water in Cranston, RI?

Nearby USGS observations produce an estimate of 45.1 ppm (2.6 grains per gallon), classified as soft. This is not a tap measurement.

Do I need a water softener in ZIP code 02920?

There is no high-hardness trigger in this profile. Confirm conditions with an at-home hardness test before purchasing equipment.

City water profile

Cranston water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Cranston, Rhode Island.

Median indexed hardness

44PPM

5 indexed ZIPs

Range 43–45.1 PPM

State comparison: 1 PPM above
State hardness rank: #6 of 12
Matched utilities: 2
Active health records: 0

City summary

What the indexed records say

Cranston has 5 published ZIP profiles across Providence County. The indexed median is 44 PPM, compared with 43 PPM across Rhode Island.

Among the 12 Rhode Islandcities with an indexed median, Cranston ranks #6from highest to lowest. Across all 33 state ZIP profiles, available estimates run from 40.5to 64.1 PPM.

The 43–45.1 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft5 ZIPs

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard0 ZIPs

5 of 5 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 3.1 miles
Profiles with evidence: 5/5

Confidence labels

High: 0Moderate: 5Low: 0

Providence-City Of

PWSID RI1592024

Surface water

System population served: 333,142
Last reported: May 26, 2026

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

Kent County Water Authority

PWSID RI1559511

Surface water

System population served: 94,107
Last reported: May 26, 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.

Record	System	Period	Status
Interim Enhanced Surface Water Treatment Rule	RI1592024	Nov 22, 2024	Resolved
CARBON, TOTAL	RI1592024	Jan 1, 2024	Resolved
Lead and Copper Rule	RI1592024	Apr 1, 2021	Resolved

Practical next steps

Move from index to evidence

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

Continue comparing

Other Rhode Island communities

Central Falls

Providence County

43 PPM median

East Providence

Providence County

43 PPM median

Pawtucket

Providence County

43 PPM median

Providence

Providence County

43 PPM median

Woonsocket

Providence County

41 PPM median

Warwick

Kent County

44 PPM median

Search all 12 Rhode Island cities →

Questions people ask

About water in Cranston

Is the water hard?

The indexed city median is 44 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.