How hard is the water in Edgefield County, SC?

1.4 grains per gallon

You do not need a softener here.

The median hardness measured in Edgefield County, SC is 24 mg/L as calcium carbonate, which is 1.4 gpg. That is soft on the USGS scale. It comes from 192 samples at 15 sites between 1991 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 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 1.4 gpg the most a softener would fix is the odd water spot. If a salesperson in Edgefield 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 0.5 to 3.6 gpg

The softest single sample on record in Edgefield County was 7.8 mg/L and the hardest 62.2 mg/L, an 8-fold gap. The top quarter of sites read above 1.8 gpg and the bottom quarter below 1 gpg.

Wells 0.5 gpg, rivers and lakes 1.4 gpg

2 groundwater samples from 1 wells put the median at 7.8 mg/L. 190 surface samples from 14 sites put it at 24.3 mg/L. In Edgefield County the rivers and lakes come out 0.9 gpg harder. Here the surface water reads harder than the wells, which often points to streams fed by limestone springs or irrigation return flow. The two sources are close, so the county figure should hold whichever one your tap is on.

Edgefield County against the rest of South Carolina

Among the 46 South Carolina counties with data, Edgefield County is number 21 of 46 counting from the hardest. Across the whole country it is harder than 11% of counties.

Softest in South Carolina: Aiken County at 0.2 gpg. Hardest: Georgetown County at 15.2 gpg. Closest to Edgefield County: Barnwell County (1.4), Union County (1.5), Williamsburg County (1.2).