How hard is the water in Lewis County, KY?
9.9 grains per gallon
A softener is worth it here.
The median hardness measured in Lewis County, KY is 170 mg/L as calcium carbonate, which is 9.9 gpg. That is hard on the USGS scale. It comes from 65 samples at 2 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 6.1 and 13.8 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: low (how it is measured).
What to do next
At 9.9 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 Lewis 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 2.3 to 17.6 gpg
The softest single sample on record in Lewis County was 39.6 mg/L and the hardest 301 mg/L, an 8-fold gap. The top quarter of sites read above 13.8 gpg and the bottom quarter below 6.1 gpg. So even here some sites draw water soft enough to need nothing at all.
Wells 17.6 gpg, rivers and lakes 2.3 gpg
1 groundwater samples from 1 wells put the median at 301 mg/L. 64 surface samples from 1 sites put it at 39.6 mg/L. In Lewis County the wells come out 15.3 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 217 lb of salt a year (6 bags of 40 lb, about $39), 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 $139 a year.
Sizing at 9.9 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 594 | 24,000 | 72 lb |
| 2 | 1,188 | 24,000 | 145 lb |
| 4 | 2,376 | 24,000 | 289 lb |
| 6 | 3,564 | 32,000 | 434 lb |
Lewis County against the rest of Kentucky
Among the 104 Kentucky counties with data, Lewis County is number 35 of 104 counting from the hardest. Across the whole country it is harder than 51% of counties.
Softest in Kentucky: Letcher County at 0.3 gpg. Hardest: Jefferson County at 32.9 gpg. Closest to Lewis County: Henderson County (9.9), Breckinridge County (9.8), Warren County (9.7).