How hard is the water in Logan County, AR?

1.1 grains per gallon

You do not need a softener here.

The median hardness measured in Logan County, AR is 19 mg/L as calcium carbonate, which is 1.1 gpg. That is soft on the USGS scale. It comes from 689 samples at 19 sites between 1990 and 2026, drawn from every sampling site in the county, wells and surface water together.

How much it varies here

Half the sites came in between 0.7 and 1.4 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: high (how it is measured).

What to do next

You can skip the softener. At 1.1 gpg the most a softener would fix is the odd water spot. If a salesperson in Logan County says otherwise, ask to see their reading in grains per gallon and compare it with this one.

More on when a softener is not worth it.

From 0.4 to 2.6 gpg

The softest single sample on record in Logan County was 7.1 mg/L and the hardest 44.4 mg/L, a 6-fold gap. The top quarter of sites read above 1.4 gpg and the bottom quarter below 0.7 gpg.

Logan County against the rest of Arkansas

Among the 75 Arkansas counties with data, Logan County is number 62 of 75 counting from the hardest. Across the whole country it is harder than 8% of counties.

Softest in Arkansas: Hempstead County at 0.1 gpg. Hardest: Prairie County at 23.9 gpg. Closest to Logan County: Grant County (1.2), Nevada County (1.2), Cleburne County (1.2).