How hard is the water in Union County, GA?

0.4 grains per gallon

You do not need a softener here.

The median hardness measured in Union County, GA is 7 mg/L as calcium carbonate, which is 0.4 gpg. That is soft on the USGS scale. It comes from 552 samples at 28 sites between 2000 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 0.2 and 0.4 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 Union 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 1.0 gpg

The softest single sample on record in Union County was 2.2 mg/L and the hardest 17.6 mg/L, an 8-fold gap. The top quarter of sites read above 0.4 gpg and the bottom quarter below 0.2 gpg.

Wells 1 gpg, rivers and lakes 0.4 gpg

1 groundwater samples from 1 wells put the median at 16.3 mg/L. 551 surface samples from 27 sites put it at 6.6 mg/L. In Union County the wells come out 0.6 gpg harder. Groundwater sits in contact with rock for years and picks up calcium and magnesium as it goes, so wells usually read harder. The two sources are close, so the county figure should hold whichever one your tap is on.

Union County against the rest of Georgia

Among the 159 Georgia counties with data, Union County is number 150 of 159 counting from the hardest. Across the whole country it is harder than 2% of counties.

Softest in Georgia: Richmond County at 0.2 gpg. Hardest: Glynn County at 13.6 gpg. Closest to Union County: Dawson County (0.4), Fannin County (0.4), Habersham County (0.4).