How hard is the water in Granville, 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: 1
Softener for 3 people: 24k grain
Data: Utility report

Tap water in Granville has about 77 mg/L of hardness, which is 4.5 grains per gallon. On the USGS scale that counts as moderately hard. The number comes from Newark City PWS, dated April 2025.

Granville on the hardness scale, with nearby cities

Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Granville sits 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 Newark to 124 in Westerville.

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 Granville

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 Granville's water system

Granville, Village of · PWSID OH4500612

1 health-based violation since 2016

Serves about 5,946 people from groundwater.

Health-based: 1
Monitoring or reporting: 3
Open now: 1

EPA lists Granville, Village of as the system serving Granville. The hardness figure above comes from a different system's report, which TapWaterData uses for Granville.

Each dot is one health-based violation, placed at the start of its compliance period.

Contaminant or rule	Violations	Period	Status
Lead and Copper Rulecorrosion control and lead sampling	1	2024	Resolved

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 Granville 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 Granville 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 Granville?

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 Granville water system had EPA violations?

EPA records show 1 health-based violation for Granville, Village of since 2016, involving Lead and Copper Rule. There were also 3 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.