How hard is the water in Shelby County, OH?
25.5 grains per gallon
A softener will pay its way here.
The median hardness measured in Shelby County, OH is 437 mg/L as calcium carbonate, which is 25.5 gpg. That is very hard on the USGS scale. It comes from 44 samples at 36 sites between 1990 and 2022, drawn from groundwater wells, which is what most taps and private wells in the county draw on.
How much it varies here
Half the sites came in between 20.5 and 28.1 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 25.5 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 5.3 to 37.0 gpg
The softest single sample on record in Shelby County was 90 mg/L and the hardest 634 mg/L, a 7-fold gap. The top quarter of sites read above 28.1 gpg and the bottom quarter below 20.5 gpg.
Wells 25.5 gpg, rivers and lakes 18.1 gpg
44 groundwater samples from 36 wells put the median at 436.5 mg/L. 228 surface samples from 41 sites put it at 310 mg/L. In Shelby County the wells come out 7.4 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 40,000-grain unit covers a week between regenerations. Expect about 557 lb of salt a year (14 bags of 40 lb, about $100), 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 $200 a year.
Sizing at 25.5 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 1,530 | 24,000 | 186 lb |
| 2 | 3,060 | 24,000 | 372 lb |
| 4 | 6,120 | 48,000 | 745 lb |
| 6 | 9,180 | 80,000 | 1,117 lb |
Shelby County against the rest of Ohio
Among the 88 Ohio counties with data, Shelby County is number 7 of 88 counting from the hardest. Across the whole country it is harder than 92% of counties.
Softest in Ohio: Scioto County at 5.7 gpg. Hardest: Perry County at 113.3 gpg. Closest to Shelby County: Madison County (25.1), Franklin County (26.6), Athens County (26.8).