Hard water in North Olmsted, OH

Tap water hardness
210mg/L
12.3gpg
Very hardCounty estimate

County estimate from 2,295 water samples in Cuyahoga County · July 2026

OH typical
113 mg/L
Softener for 3 people
24k grain
Data
County estimate

Water samples from around North Olmsted put hardness at about 210 mg/L (12.3 gpg), which would be very hard on the USGS scale. Treat this as a rough guide: it is the median of 2,295 samples taken across Cuyahoga County, mostly wells and streams, not a test of North Olmsted's treated tap water.

North Olmsted on the hardness scale, with nearby cities
060120180240300360+OH typical 113Oberlin: 50 mg/LOberlin 50Avon Lake: 78 mg/LAvon Lake 78Fairview Park: 111 mg/LFairview Park 111Cleveland: 111 mg/LCleveland 111Lakewood: 112 mg/LLakewood 112Avon: 130 mg/LAvon 130North Ridgeville: 220 mg/LNorth Ridgeville 220Elyria: 220 mg/LElyria 220Lorain: 220 mg/LLorain 220Brunswick: 247 mg/LBrunswick 247North Olmsted 210mg/L as calcium carbonate060120180240300360+OH 113Avon Lake: 78 mg/LAvon Lake 78Fairview Park: 111 mg/LFairview P. 111Lakewood: 112 mg/LLakewood 112Avon: 130 mg/LAvon 130North Ridgeville: 220 mg/LNorth Ridg. 220Elyria: 220 mg/LElyria 220210 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 210 mg/L, North Olmsted is 97 mg/L above the typical Ohio figure of 113. Of the 10 nearest cities we track, 6 have softer water and 4 have harder. The range nearby runs from 50 mg/L in Oberlin to 247 in Brunswick.

What 210 mg/L means at home

Scale forms fast here. Kettles and coffee makers need regular descaling, and showerheads clog unless you clean them.

Tank water heaters collect mineral sediment that insulates the water from the burner, so flushing the tank matters more than usual.

Dishes and glass shower doors spot easily. Soap scum and a dull film on hair or laundry are common complaints.

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

At 210 mg/L most of the trouble is scale, and only a few things deal with it.

Ion-exchange water softener

The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.

Salt-free conditioner

No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.

Reverse osmosis or carbon filter

Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.

Softener size for North Olmsted

3 people × 75 gallons a day × 12.3 gpg = 2,763 grains a day. A 24,000-grain unit regenerates about every 8 days.

Size it for your household

EPA record for North Olmsted's water system

We could not match North Olmsted to a community water system in EPA's records. Your water bill or the yearly Consumer Confidence Report names the system and its ID.

Questions

Is North Olmsted water hard?

Yes. It measures about 210 mg/L (12.3 grains per gallon), which the USGS classes as very hard.

What is the water hardness in North Olmsted in grains per gallon?

About 12.3 gpg. One grain per gallon equals 17.1 mg/L, so 210 mg/L divided by 17.1 gives 12.3.

What size water softener do I need in North Olmsted?

For 3 people using 75 gallons each per day, 12.3 gpg works out to about 2,763 grains a day. A 24,000-grain softener covers that with a regeneration about every 8 days.

Nearby cities

All 108 cities in Ohio

Hardness data: TapWaterData US Water Hardness (county estimate, July 4, 2026), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.