How hard is the water in Erie County, OH?
14.9 grains per gallon
A softener will pay its way here.
The median hardness measured in Erie County, OH is 256 mg/L as calcium carbonate, which is 14.9 gpg. That is very hard on the USGS scale. It comes from 751 samples at 69 sites between 1995 and 2024, drawn from every sampling site in the county, wells and surface water together.
How much it varies here
Half the sites came in between 12 and 18 gpg. The whole middle of that range gives the same answer, so a test of your own tap is unlikely to change it. Confidence in the county figure: high (how it is measured).
What to do next
At 14.9 gpg a softener pays its way here. Before you buy, check the quoted unit's grain capacity against the sizing table below, and ask whether it regenerates on demand, which uses less salt than a timer. Call your utility for its own report if you are on city water.
More on sizing a softener for your household.
From 6.8 to 70.7 gpg
The softest single sample on record in Erie County was 117 mg/L and the hardest 1,210 mg/L, a 10-fold gap. The top quarter of sites read above 18 gpg and the bottom quarter below 12 gpg.
Wells 37.5 gpg, rivers and lakes 14.8 gpg
3 groundwater samples from 2 wells put the median at 641.8 mg/L. 643 surface samples from 58 sites put it at 252.8 mg/L. In Erie County the wells come out 22.7 gpg harder. Groundwater sits in contact with rock for years and picks up calcium and magnesium as it goes, so wells usually read harder. A utility here that draws from the river can deliver noticeably different water from a private well next door.
What a softener would cost to run
For a household of 3, a 24,000-grain unit covers a week between regenerations. Expect about 326 lb of salt a year (9 bags of 40 lb, about $59), and roughly 2,346 gallons of regeneration water. Installed, most units run $1,000 to $4,500; spread over 15 years with salt, that is about $159 a year.
Sizing at 14.9 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 894 | 24,000 | 109 lb |
| 2 | 1,788 | 24,000 | 218 lb |
| 4 | 3,576 | 32,000 | 435 lb |
| 6 | 5,364 | 40,000 | 653 lb |
Erie County against the rest of Ohio
Among the 88 Ohio counties with data, Erie County is number 65 of 88 counting from the hardest. Across the whole country it is harder than 69% of counties.
Softest in Ohio: Scioto County at 5.7 gpg. Hardest: Perry County at 113.3 gpg. Closest to Erie County: Lucas County (15), Medina County (15), Paulding County (14.7).