How hard is the water in Williams County, OH?
19 grains per gallon
A softener will pay its way here.
The median hardness measured in Williams County, OH is 325 mg/L as calcium carbonate, which is 19 gpg. That is very hard on the USGS scale. It comes from 33 samples at 16 sites between 1995 and 2024, 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 16.6 and 22.4 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 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 12.9 to 74.2 gpg
The softest single sample on record in Williams County was 220 mg/L and the hardest 1,270 mg/L, a 6-fold gap. The top quarter of sites read above 22.4 gpg and the bottom quarter below 16.6 gpg.
Wells 19 gpg, rivers and lakes 18.3 gpg
33 groundwater samples from 16 wells put the median at 324.5 mg/L. 332 surface samples from 38 sites put it at 312.5 mg/L. In Williams County the wells come out 0.7 gpg harder. Groundwater sits in contact with rock for years and picks up calcium and magnesium as it goes, so wells usually read harder. 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 414 lb of salt a year (11 bags of 40 lb, about $75), 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 $175 a year.
Sizing at 19 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 1,140 | 24,000 | 139 lb |
| 2 | 2,280 | 24,000 | 277 lb |
| 4 | 4,560 | 32,000 | 555 lb |
| 6 | 6,840 | 48,000 | 832 lb |
Williams County against the rest of Ohio
Among the 88 Ohio counties with data, Williams County is number 39 of 88 counting from the hardest. Across the whole country it is harder than 81% of counties.
Softest in Ohio: Scioto County at 5.7 gpg. Hardest: Perry County at 113.3 gpg. Closest to Williams County: Portage County (19), Knox County (18.8), Seneca County (19.1).