How hard is the water in Hot Spring County, AR?

1.3 grains per gallon

You do not need a softener here.

The median hardness measured in Hot Spring County, AR is 23 mg/L as calcium carbonate, which is 1.3 gpg. That is soft on the USGS scale. It comes from 1,482 samples at 29 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 1.3 and 3.7 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

You can skip the softener. At 1.3 gpg the most a softener would fix is the odd water spot. If a salesperson in Hot Spring County says otherwise, ask to see their reading in grains per gallon and compare it with this one. Because Hot Spring 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 0.3 to 65.4 gpg

The softest single sample on record in Hot Spring County was 4.7 mg/L and the hardest 1,120 mg/L, a 238-fold gap. The top quarter of sites read above 3.7 gpg and the bottom quarter below 1.3 gpg. So even in a soft county, a handful of wells here produce water hard enough to scale a heater.

Hot Spring County against the rest of Arkansas

Among the 75 Arkansas counties with data, Hot Spring County is number 55 of 75 counting from the hardest. Across the whole country it is harder than 10% of counties.

Softest in Arkansas: Hempstead County at 0.1 gpg. Hardest: Prairie County at 23.9 gpg. Closest to Hot Spring County: Franklin County (1.4), Clark County (1.3), Montgomery County (1.3).