How hard is the water in Harlan County, KY?
3.6 grains per gallon
Optional: a softener helps, but plenty of homes skip it.
The median hardness measured in Harlan County, KY is 62 mg/L as calcium carbonate, which is 3.6 gpg. That is moderately hard on the USGS scale. It comes from 626 samples at 23 sites between 2000 and 2022, drawn from every sampling site in the county, wells and surface water together.
How much it varies here
Half the sites came in between 3 and 6.8 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 3.6 gpg this is your call. Look for white film on glasses and crust on the shower head: if you see little of either, you can live without one. If you do want one, a 24,000-grain unit is enough, so ask for that size rather than a bigger one. Because Harlan County straddles a decision line, check your own tap with a $10 test strip before you spend anything.
More on when a softener is not worth it.
From 0.2 to 20.4 gpg
The softest single sample on record in Harlan County was 4.1 mg/L and the hardest 350 mg/L, an 85-fold gap. The top quarter of sites read above 6.8 gpg and the bottom quarter below 3 gpg.
What a softener would cost to run
For a household of 3, a 24,000-grain unit covers a week between regenerations. Expect about 79 lb of salt a year (2 bags of 40 lb, about $14), 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 $114 a year.
Sizing at 3.6 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 216 | 24,000 | 26 lb |
| 2 | 432 | 24,000 | 53 lb |
| 4 | 864 | 24,000 | 105 lb |
| 6 | 1,296 | 24,000 | 158 lb |
Harlan County against the rest of Kentucky
Among the 104 Kentucky counties with data, Harlan County is number 90 of 104 counting from the hardest. Across the whole country it is harder than 25% of counties.
Softest in Kentucky: Letcher County at 0.3 gpg. Hardest: Jefferson County at 32.9 gpg. Closest to Harlan County: Magoffin County (3.2), McCracken County (3.2), Morgan County (3.1).