Water Hardness in Warren, OH

Q: Do I need a water softener in Warren, OH?

At a citywide weighted average of 117 PPM, Warren has relatively soft water. A water softener is generally not necessary.

Q: How many water systems serve Warren, OH?

Warren, Ohio has 9 matched water systems across 4 zip codes.

Ohio · 4 zip codes · 9 matched water systems

117 PPM

6.8 GPG

Slightly Hard

0Soft60120180300+

High Confidence — USGS Monitoring

Dataset updated March 9, 20269 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

Source context

How this city reading is built

This city reading is a weighted rollup across 9 matched water systems and 4 ZIP codes. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis

6 USGS-backed sources

9 matched systems total for this city; USGS monitoring is used where treated-water reports are unavailable.

Water source profile

Primarily surface water

Surface-water hardness can shift with reservoirs, runoff, season, and treatment. This profile is weighted by known population served across matched systems.

Data recency

March 9, 2026

Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.

Water Systems in Warren

These systems are matched to Warren, OH. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.

9 water systems

PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.

Water System	Source	Hardness	Pop. Served	Data Source
Warren City Pws OH7803811	surface water	93 PPM Slightly Hard	49,130	Estimated — Nearby Data
Niles City Pws OH7802403	surface water	145 PPM Moderately Hard	21,961	Estimated — Nearby Data
Girard City OH7801103	surface water	145 PPM Moderately Hard	14,122	Estimated — Nearby Data
Lordstown Village Pws OH7804403	surface water	242 PPM Hard	3,515	High Confidence — USGS Monitoring
Lisbon Village OH1501512	groundwater	242 PPM Hard	2,821	High Confidence — USGS Monitoring

Warren City Pws

OH7803811

Slightly Hard

93 PPMsurface water49,130 servedEstimated — Nearby Data

Niles City Pws

OH7802403

Moderately Hard

145 PPMsurface water21,961 servedEstimated — Nearby Data

Girard City

OH7801103

Moderately Hard

145 PPMsurface water14,122 servedEstimated — Nearby Data

Lordstown Village Pws

OH7804403

Hard

242 PPMsurface water3,515 servedHigh Confidence — USGS Monitoring

Lisbon Village

OH1501512

Hard

242 PPMgroundwater2,821 servedHigh Confidence — USGS Monitoring

Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Warren, OH

44481124 44483115 44484115 44485115

What This Means For You

Recommendations are based on the displayed hardness reading. Confirm your tap reading before sizing or buying treatment equipment.

Slightly Hard Water

Your water is slightly hard. You may notice minor spotting on dishes or a slight film on faucets. A water softener is optional but can improve water quality.

Recommended Products

Water Hardness Test Kit

Our PickVarify (150 Strips)Also GreatJNW Direct (150 Strips)

Salt-Free Water Conditioner

Our PickSpringWell Salt-Free Cartridge

Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | How to Test Your Water

Know your water hardness?

If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Warren, OH.

Submit Your Data

Frequently Asked Questions

How hard is the water in Warren, OH?

The citywide weighted average water hardness in Warren, OH is 117 PPM (6.8 GPG), classified as slightly hard. This is based on 9 matched water systems.

Do I need a water softener in Warren, OH?

At 117 PPM, the citywide average is relatively soft. A water softener is generally not necessary.

Is hard water in Warren, OH safe to drink?

Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.

How many water systems serve Warren, OH?

Warren, Ohio is served by 9 matched water systems across 4 zip codes.