How hard is the water in Washington County, KY?

12.1 grains per gallon

A softener will pay its way here.

The median hardness measured in Washington County, KY is 207 mg/L as calcium carbonate, which is 12.1 gpg. That is very hard on the USGS scale. It comes from 78 samples at 2 sites between 1999 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 11.8 and 12.4 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: low (how it is measured).

What to do next

At 12.1 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 11.5 to 12.7 gpg

The softest single sample on record in Washington County was 196.5 mg/L and the hardest 217 mg/L, a 1-fold gap. The top quarter of sites read above 12.4 gpg and the bottom quarter below 11.8 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 264 lb of salt a year (7 bags of 40 lb, about $47), 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 $147 a year.

Sizing at 12.1 gpg

Washington County against the rest of Kentucky

Among the 104 Kentucky counties with data, Washington County is number 16 of 104 counting from the hardest. Across the whole country it is harder than 59% of counties.

Softest in Kentucky: Letcher County at 0.3 gpg. Hardest: Jefferson County at 32.9 gpg. Closest to Washington County: Hopkins County (12), Grant County (11.9), Woodford County (11.9).