How hard is the water in Fayette County, OH?
18.3 grains per gallon
A softener will pay its way here.
The median hardness measured in Fayette County, OH is 314 mg/L as calcium carbonate, which is 18.3 gpg. That is very hard on the USGS scale. It comes from 564 samples at 63 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 16 and 20.8 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 18.3 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 11.2 to 51.1 gpg
The softest single sample on record in Fayette County was 192 mg/L and the hardest 874 mg/L, a 5-fold gap. The top quarter of sites read above 20.8 gpg and the bottom quarter below 16 gpg.
Wells 25.4 gpg, rivers and lakes 18.1 gpg
15 groundwater samples from 3 wells put the median at 434 mg/L. 479 surface samples from 53 sites put it at 310 mg/L. In Fayette County the wells come out 7.3 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 401 lb of salt a year (11 bags of 40 lb, about $72), 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 $172 a year.
Sizing at 18.3 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 1,098 | 24,000 | 134 lb |
| 2 | 2,196 | 24,000 | 267 lb |
| 4 | 4,392 | 32,000 | 534 lb |
| 6 | 6,588 | 48,000 | 802 lb |
Fayette County against the rest of Ohio
Among the 88 Ohio counties with data, Fayette County is number 43 of 88 counting from the hardest. Across the whole country it is harder than 80% of counties.
Softest in Ohio: Scioto County at 5.7 gpg. Hardest: Perry County at 113.3 gpg. Closest to Fayette County: Hancock County (18.3), Crawford County (18.5), Harrison County (18.2).