How hard is the water in Newark, OH?

Tap water hardness
77mg/L
4.5gpg
Moderately hard

Reported by Newark City PWS · April 2025

OH typical
113 mg/L
EPA health violations since 2016
0
Softener for 3 people
24k grain
Data
Utility report

The water in Newark carries roughly 77 mg/L of dissolved calcium and magnesium, or 4.5 grains per gallon. That is moderately hard water. The number comes from Newark City PWS, dated April 2025.

Newark on the hardness scale, with nearby cities
060120180240300360+OH typical 113Granville: 77 mg/LGranville 77Gahanna: 96 mg/LGahanna 96Pataskala: 97 mg/LPataskala 97New Albany: 97 mg/LNew Albany 97Reynoldsburg: 97 mg/LReynoldsburg 97Pickerington: 97 mg/LPickerington 97Whitehall: 97 mg/LWhitehall 97Blacklick Estates: 97 mg/LBlacklick Estates 97Lancaster: 109 mg/LLancaster 109Zanesville: 224 mg/LZanesville 224Newark 77mg/L as calcium carbonate060120180240300360+OH 113Granville: 77 mg/LGranville 77Pataskala: 97 mg/LPataskala 97New Albany: 97 mg/LNew Albany 97Reynoldsburg: 97 mg/LReynoldsbu. 97Pickerington: 97 mg/LPickeringt. 97Zanesville: 224 mg/LZanesville 22477 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

At 77 mg/L, Newark is 36 mg/L below the typical Ohio figure of 113. None of the 10 nearest cities we track has softer water. The range nearby runs from 77 mg/L in Granville to 224 in Zanesville.

What 77 mg/L means at home

You may see faint white spots on glasses and shower doors after the water dries.

Scale builds up slowly. A kettle or coffee maker needs descaling now and then, maybe every few months.

Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.

What to do about it

Optional. Plenty of households at this level live with it and descale the kettle now and then.

Water softener

Worth a look if spots on glass bother you, or if your tankless water heater manual asks for softer water.

Carbon filter

Improves taste and removes chlorine. It leaves calcium and magnesium in place.

Softener size for Newark

3 people × 75 gallons a day × 4.5 gpg = 1,015 grains a day. A 24,000-grain unit regenerates about every 23 days.

Size it for your household

EPA record for Newark's water system

Newark City PWS · PWSID OH4502314

No health-based violations since 2016

Serves about 49,934 people from surface water.

Health-based
0
Monitoring or reporting
2
Open now
1

Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.

Questions

Is Newark water hard?

Somewhat. It measures about 77 mg/L (4.5 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Newark in grains per gallon?

About 4.5 gpg. One grain per gallon equals 17.1 mg/L, so 77 mg/L divided by 17.1 gives 4.5.

What size water softener do I need in Newark?

For 3 people using 75 gallons each per day, 4.5 gpg works out to about 1,015 grains a day. A 24,000-grain softener covers that with a regeneration about every 23 days.

Has the Newark water system had EPA violations?

EPA records show no health-based violations for Newark City PWS since 2016. There were also 2 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 108 cities in Ohio

Hardness data: TapWaterData US Water Hardness (utility report, April 5, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.