How hard is the water in Butler County, OH?
19.9 grains per gallon
A softener will pay its way here.
The median hardness measured in Butler County, OH is 340 mg/L as calcium carbonate, which is 19.9 gpg. That is very hard on the USGS scale. It comes from 139 samples at 40 sites between 1990 and 2021, 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 17.7 and 22.1 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 19.9 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 15.8 to 27.3 gpg
The softest single sample on record in Butler County was 270 mg/L and the hardest 468 mg/L, a 2-fold gap. The top quarter of sites read above 22.1 gpg and the bottom quarter below 17.7 gpg.
Wells 19.9 gpg, rivers and lakes 17.3 gpg
139 groundwater samples from 40 wells put the median at 340.3 mg/L. 881 surface samples from 120 sites put it at 296.5 mg/L. In Butler County the wells come out 2.6 gpg harder. Groundwater sits in contact with rock for years and picks up calcium and magnesium as it goes, so wells usually read harder. The two sources are close, so the county figure should hold whichever one your tap is on.
What a softener would cost to run
For a household of 3, a 32,000-grain unit covers a week between regenerations. Expect about 434 lb of salt a year (11 bags of 40 lb, about $78), 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 $178 a year.
Sizing at 19.9 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 1,194 | 24,000 | 145 lb |
| 2 | 2,388 | 24,000 | 291 lb |
| 4 | 4,776 | 40,000 | 581 lb |
| 6 | 7,164 | 64,000 | 872 lb |
Butler County against the rest of Ohio
Among the 88 Ohio counties with data, Butler County is number 31 of 88 counting from the hardest. Across the whole country it is harder than 84% of counties.
Softest in Ohio: Scioto County at 5.7 gpg. Hardest: Perry County at 113.3 gpg. Closest to Butler County: Hamilton County (19.9), Ashland County (19.8), Union County (19.7).