How hard is the water in Brown County, OH?
11.6 grains per gallon
A softener will pay its way here.
The median hardness measured in Brown County, OH is 198 mg/L as calcium carbonate, which is 11.6 gpg. That is very hard on the USGS scale. It comes from 381 samples at 67 sites between 1997 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 9.9 and 12.7 gpg. That spread crosses a decision line, so some homes here land on a different answer. A $10 test strip on your own tap settles it. Confidence in the county figure: high (how it is measured).
What to do next
At 11.6 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. Because Brown County straddles a decision line, check your own tap with a $10 test strip before you spend anything.
More on sizing a softener for your household.
From 3.7 to 19.5 gpg
The softest single sample on record in Brown County was 64 mg/L and the hardest 333 mg/L, a 5-fold gap. The top quarter of sites read above 12.7 gpg and the bottom quarter below 9.9 gpg.
Wells 11.3 gpg, rivers and lakes 11.6 gpg
3 groundwater samples from 2 wells put the median at 193.3 mg/L. 344 surface samples from 61 sites put it at 198 mg/L. In Brown County the rivers and lakes come out 0.3 gpg harder. Here the surface water reads harder than the wells, which often points to streams fed by limestone springs or irrigation return flow. 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 24,000-grain unit covers a week between regenerations. Expect about 253 lb of salt a year (7 bags of 40 lb, about $45), 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 $145 a year.
Sizing at 11.6 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 696 | 24,000 | 85 lb |
| 2 | 1,392 | 24,000 | 169 lb |
| 4 | 2,784 | 24,000 | 339 lb |
| 6 | 4,176 | 32,000 | 508 lb |
Brown County against the rest of Ohio
Among the 88 Ohio counties with data, Brown County is number 80 of 88 counting from the hardest. Across the whole country it is harder than 57% of counties.
Softest in Ohio: Scioto County at 5.7 gpg. Hardest: Perry County at 113.3 gpg. Closest to Brown County: Jackson County (11.6), Lake County (11.6), Cuyahoga County (12.1).