Is tap water safe in Warren?

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 Warren, OH?

Nearby USGS observations produce an estimate of 110.5 ppm (6.5 grains per gallon), classified as moderately hard. This is not a tap measurement.

Do I need a water softener in ZIP code 44485?

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

City water profile

Warren water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Warren, Ohio.

Median indexed hardness

109PPM

2 indexed ZIPs

Range 107–110.5 PPM

State comparison: 117 PPM below
State hardness rank: #115 of 119
Matched utilities: 1
Active health records: 0

City summary

What the indexed records say

Warren has 2 published ZIP profiles across Trumbull County. The indexed median is 109 PPM, compared with 226 PPM across Ohio.

Among the 119 Ohiocities with an indexed median, Warren ranks #115from highest to lowest. Across all 162 state ZIP profiles, available estimates run from 77.2to 387 PPM.

The 107–110.5 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard2 ZIPs

Hard0 ZIPs

Very hard0 ZIPs

2 of 2 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 19.6 miles
Profiles with evidence: 2/2

Confidence labels

High: 0Moderate: 2Low: 0

Observation window: Jan 25, 2016 to Jun 15, 2026.

ZIP directory

Water reports in Warren

Open a ZIP for site-level provenance and measurements.

ZIP code

44483

Moderately Hard

107 PPM

Nearest site: 17.9 mi
Confidence: Moderate

View full ZIP evidence →

ZIP code

44485

Moderately Hard

110.5 PPM

Nearest site: 19.6 mi
Confidence: Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

Warren City Pws

PWSID OH7803811

Surface water

System population served: 49,130
Last reported: May 15, 2026

A municipal system, in-state city, and served county all agree with this Census 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
Lead and Copper Rule	OH7803811	Jul 1, 2023	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 Ohio communities

Cortland

Trumbull County

157 PPM median

Girard

Trumbull County

117 PPM median

Hubbard

Trumbull County

114 PPM median

Newton Falls

Trumbull County

118 PPM median

Niles

Trumbull County

116 PPM median

Belpre

Washington County

110 PPM median

Search all 119 Ohio cities →

Questions people ask

About water in Warren

Is the water hard?

The indexed city median is 109 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.