How hard is the water in Coweta County, GA?

1.5 grains per gallon

You do not need a softener here.

The median hardness measured in Coweta County, GA is 25 mg/L as calcium carbonate, which is 1.5 gpg. That is soft on the USGS scale. It comes from 317 samples at 21 sites between 2001 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 1.6 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 1.5 gpg the most a softener would fix is the odd water spot. If a salesperson in Coweta 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 0.6 to 3.6 gpg

The softest single sample on record in Coweta County was 11 mg/L and the hardest 61.7 mg/L, a 6-fold gap. The top quarter of sites read above 1.6 gpg and the bottom quarter below 1 gpg.

Wells 3.6 gpg, rivers and lakes 1.4 gpg

1 groundwater samples from 1 wells put the median at 61.7 mg/L. 316 surface samples from 20 sites put it at 23.9 mg/L. In Coweta County the wells come out 2.2 gpg harder. Groundwater sits in contact with rock for years and picks up calcium and magnesium as it goes, so wells usually read harder. The two sources are close, so the county figure should hold whichever one your tap is on.

Coweta County against the rest of Georgia

Among the 159 Georgia counties with data, Coweta County is number 77 of 159 counting from the hardest. Across the whole country it is harder than 12% of counties.

Softest in Georgia: Richmond County at 0.2 gpg. Hardest: Glynn County at 13.6 gpg. Closest to Coweta County: Bulloch County (1.5), Douglas County (1.4), Effingham County (1.5).