How hard is the water in Hancock County, MS?
0.4 grains per gallon
You do not need a softener here.
The median hardness measured in Hancock County, MS is 6 mg/L as calcium carbonate, which is 0.4 gpg. That is soft on the USGS scale. It comes from 6 samples at 6 sites between 1990 and 2020, drawn from groundwater wells, which is what most taps and private wells in the county draw on.
How much it varies here
Half the sites came in between 0.2 and 0.7 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: medium (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 Hancock 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 0.2 to 5.7 gpg
The softest single sample on record in Hancock County was 2.7 mg/L and the hardest 97 mg/L, a 36-fold gap. The top quarter of sites read above 0.7 gpg and the bottom quarter below 0.2 gpg.
Wells 0.4 gpg, rivers and lakes 23.6 gpg
6 groundwater samples from 6 wells put the median at 6.4 mg/L. 16 surface samples from 4 sites put it at 404.4 mg/L. In Hancock County the rivers and lakes come out 23.2 gpg harder. Here the surface water reads harder than the wells, which often points to streams fed by limestone springs or irrigation return flow. A utility here that draws from the aquifer can deliver noticeably different water from a private well next door.
Hancock County against the rest of Mississippi
Among the 78 Mississippi counties with data, Hancock County is number 75 of 78 counting from the hardest. Across the whole country it is harder than 1% of counties.
Softest in Mississippi: Issaquena County at 0.1 gpg. Hardest: Franklin County at 60.5 gpg. Closest to Hancock County: Itawamba County (0.4), Panola County (0.3), Pike County (0.3).