How hard is the water in Daviess County, KY?
8.1 grains per gallon
A softener is worth it here.
The median hardness measured in Daviess County, KY is 139 mg/L as calcium carbonate, which is 8.1 gpg. That is hard on the USGS scale. It comes from 95 samples at 6 sites between 1999 and 2019, drawn from every sampling site in the county, wells and surface water together.
How much it varies here
Half the sites came in between 5.5 and 10.9 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: medium (how it is measured).
What to do next
At 8.1 gpg a softener is worth getting, mainly to protect the water heater and cut soap use. Get at least two quotes, ask each installer what grain capacity they are fitting, and check it against the sizing table below. Because Daviess 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 4.1 to 14.9 gpg
The softest single sample on record in Daviess County was 70.2 mg/L and the hardest 255 mg/L, a 4-fold gap. The top quarter of sites read above 10.9 gpg and the bottom quarter below 5.5 gpg.
Wells 12.2 gpg, rivers and lakes 5.9 gpg
20 groundwater samples from 2 wells put the median at 208 mg/L. 75 surface samples from 4 sites put it at 101 mg/L. In Daviess County the wells come out 6.3 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 177 lb of salt a year (5 bags of 40 lb, about $32), 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 $132 a year.
Sizing at 8.1 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 486 | 24,000 | 59 lb |
| 2 | 972 | 24,000 | 118 lb |
| 4 | 1,944 | 24,000 | 237 lb |
| 6 | 2,916 | 24,000 | 355 lb |
Daviess County against the rest of Kentucky
Among the 104 Kentucky counties with data, Daviess County is number 54 of 104 counting from the hardest. Across the whole country it is harder than 43% of counties.
Softest in Kentucky: Letcher County at 0.3 gpg. Hardest: Jefferson County at 32.9 gpg. Closest to Daviess County: Larue County (8.1), Butler County (8.3), Estill County (8.3).