How hard is the water in Lawrence County, KY?
7.1 grains per gallon
A softener is worth it here.
The median hardness measured in Lawrence County, KY is 122 mg/L as calcium carbonate, which is 7.1 gpg. That is hard on the USGS scale. It comes from 148 samples at 6 sites between 1990 and 2007, drawn from every sampling site in the county, wells and surface water together.
How much it varies here
Half the sites came in between 5.2 and 11 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 7.1 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 Lawrence 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 3.0 to 19.5 gpg
The softest single sample on record in Lawrence County was 51.2 mg/L and the hardest 333 mg/L, a 7-fold gap. The top quarter of sites read above 11 gpg and the bottom quarter below 5.2 gpg. So even here some sites draw water soft enough to need nothing at all.
What a softener would cost to run
For a household of 3, a 24,000-grain unit covers a week between regenerations. Expect about 155 lb of salt a year (4 bags of 40 lb, about $28), 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 $128 a year.
Sizing at 7.1 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 426 | 24,000 | 52 lb |
| 2 | 852 | 24,000 | 104 lb |
| 4 | 1,704 | 24,000 | 207 lb |
| 6 | 2,556 | 24,000 | 311 lb |
Lawrence County against the rest of Kentucky
Among the 104 Kentucky counties with data, Lawrence County is number 60 of 104 counting from the hardest. Across the whole country it is harder than 39% of counties.
Softest in Kentucky: Letcher County at 0.3 gpg. Hardest: Jefferson County at 32.9 gpg. Closest to Lawrence County: Crittenden County (7.1), Metcalfe County (7.1), Caldwell County (7.3).