How hard is the water in Wilson County, NC?

1.4 grains per gallon

You do not need a softener here.

The median hardness measured in Wilson County, NC is 24 mg/L as calcium carbonate, which is 1.4 gpg. That is soft on the USGS scale. It comes from 257 samples at 28 sites between 1990 and 2025, drawn from every sampling site in the county, wells and surface water together.

How much it varies here

Half the sites came in between 1.2 and 1.7 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: 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 Wilson 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 0.4 to 18.8 gpg

The softest single sample on record in Wilson County was 6.2 mg/L and the hardest 321 mg/L, a 52-fold gap. The top quarter of sites read above 1.7 gpg and the bottom quarter below 1.2 gpg. So even in a soft county, a handful of wells here produce water hard enough to scale a heater.

Wells 2.7 gpg, rivers and lakes 1.4 gpg

3 groundwater samples from 2 wells put the median at 46.5 mg/L. 254 surface samples from 26 sites put it at 23.5 mg/L. In Wilson County the wells come out 1.3 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.

Wilson County against the rest of North Carolina

Among the 99 North Carolina counties with data, Wilson County is number 60 of 99 counting from the hardest. Across the whole country it is harder than 11% of counties.

Softest in North Carolina: Bertie County at 0.3 gpg. Hardest: Dare County at 63.7 gpg. Closest to Wilson County: Bladen County (1.4), Gaston County (1.4), Hertford County (1.4).