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City water profile

Warwick water quality

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

Median indexed hardness

44PPM

4 indexed ZIPs

Range 43–45.1 PPM

State comparison
1 PPM above
State hardness rank
#5 of 12
Matched utilities
3
Active health records
0

City summary

What the indexed records say

Warwick has 4 published ZIP profiles across Kent County. The indexed median is 44 PPM, compared with 43 PPM across Rhode Island.

Among the 12 Rhode Islandcities with an indexed median, Warwick ranks #5from 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

Soft4 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard0 ZIPs

4 of 4 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
5.2 miles
Profiles with evidence
4/4

Confidence labels

High: 0Moderate: 4Low: 0

Observation window: Jan 4, 2016 to Jun 8, 2026.

ZIP directory

Water reports in Warwick

Open a ZIP for site-level provenance and measurements.

ZIP code

02818

Soft

45.1 PPM

Nearest site
9.6 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

02886

Soft

45.1 PPM

Nearest site
5.2 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

02888

Soft

43.2 PPM

Nearest site
1.3 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

02889

Soft

43 PPM

Nearest site
4.8 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

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.

Warwick-City Of

PWSID RI1615627

Surface water
System population served
73,289
Last reported
May 26, 2026

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

Warwick-Potowomut

PWSID RI1900051

Surface water
System population served
2,163
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.

RecordSystemPeriodStatus
Lead and Copper RuleRI1900051Oct 1, 2023Resolved
ChlorineRI1900051Jan 1, 2023Resolved
Revised Total Coliform RuleRI1615627Dec 11, 2021Resolved
Public NoticeRI1615627Sep 5, 2021Resolved
Consumer Confidence RuleRI1615627Jul 1, 2021Resolved
Consumer Confidence RuleRI1900051Jul 1, 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 Warwick

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.