How hard is the water in Waterville, OH?

Tap water hardness
110mg/L
6.4gpg
Moderately hard

Reported by Waterville City · December 2024

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

Waterville water measures 110 mg/L (6.4 gpg) of hardness, moderately hard by USGS standards. The number comes from Waterville City, dated December 2024.

Waterville on the hardness scale, with nearby cities
060120180240300360+OH typical 113Oberlin: 50 mg/LOberlin 50Toledo: 76 mg/LToledo 76Perrysburg: 85 mg/LPerrysburg 85Findlay: 138 mg/LFindlay 138Lorain: 220 mg/LLorain 220Sandusky: 260 mg/LSandusky 260Bowling Green: 265 mg/LBowling Green 265Lima: 301 mg/LLima 301Marion: 311 mg/LMarion 311Bryan: 380 mg/LBryan 380Waterville 110mg/L as calcium carbonate060120180240300360+OH 113Toledo: 76 mg/LToledo 76Perrysburg: 85 mg/LPerrysburg 85Findlay: 138 mg/LFindlay 138Sandusky: 260 mg/LSandusky 260Bowling Green: 265 mg/LBowling Gr. 265Bryan: 380 mg/LBryan 380110 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 110 mg/L, Waterville is close to the typical Ohio figure of 113 mg/L. Of the 10 nearest cities we track, 3 have softer water and 7 have harder. The range nearby runs from 50 mg/L in Oberlin to 380 in Bryan.

What 110 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 Waterville

3 people × 75 gallons a day × 6.4 gpg = 1,447 grains a day. A 24,000-grain unit regenerates about every 16 days.

Size it for your household

EPA record for Waterville's water system

Waterville City · PWSID OH4801503

No health-based violations since 2016

Serves about 6,500 people from surface water.

Health-based
0
Monitoring or reporting
4
Open now
3

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 Waterville water hard?

Somewhat. It measures about 110 mg/L (6.4 grains per gallon), which the USGS classes as moderately hard.

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

About 6.4 gpg. One grain per gallon equals 17.1 mg/L, so 110 mg/L divided by 17.1 gives 6.4.

What size water softener do I need in Waterville?

For 3 people using 75 gallons each per day, 6.4 gpg works out to about 1,447 grains a day. A 24,000-grain softener covers that with a regeneration about every 16 days.

Has the Waterville water system had EPA violations?

EPA records show no health-based violations for Waterville City since 2016. There were also 4 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, December 23, 2024), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.