How hard is the water in Walton County, FL?

0.4 grains per gallon

You do not need a softener here.

The median hardness measured in Walton County, FL is 7 mg/L as calcium carbonate, which is 0.4 gpg. That is soft on the USGS scale. It comes from 181 samples at 32 sites between 1990 and 2024, drawn from every sampling site in the county, wells and surface water together.

How much it varies here

Half the sites came in between 0.3 and 1.8 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 0.4 gpg the most a softener would fix is the odd water spot. If a salesperson in Walton 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 0.1 to 13.0 gpg

The softest single sample on record in Walton County was 1 mg/L and the hardest 222 mg/L, a 222-fold gap. The top quarter of sites read above 1.8 gpg and the bottom quarter below 0.3 gpg. So even in a soft county, a handful of wells here produce water hard enough to scale a heater.

Wells 5 gpg, rivers and lakes 0.4 gpg

3 groundwater samples from 3 wells put the median at 86.2 mg/L. 178 surface samples from 29 sites put it at 6.8 mg/L. In Walton County the wells come out 4.6 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.

Walton County against the rest of Florida

Among the 67 Florida counties with data, Walton County is number 65 of 67 counting from the hardest. Across the whole country it is harder than 2% of counties.

Softest in Florida: Washington County at 0.3 gpg. Hardest: Sarasota County at 32.2 gpg. Closest to Walton County: Bay County (0.4), Okaloosa County (0.5), Washington County (0.3).