How hard is the water in Polk County, NC?

0.6 grains per gallon

You do not need a softener here.

The median hardness measured in Polk County, NC is 11 mg/L as calcium carbonate, which is 0.6 gpg. That is soft on the USGS scale. It comes from 17 samples at 4 sites between 2010 and 2014, drawn from every sampling site in the county, wells and surface water together.

How much it varies here

Half the sites came in between 0.6 and 1.5 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 0.6 gpg the most a softener would fix is the odd water spot. If a salesperson in Polk 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 3.8 gpg

The softest single sample on record in Polk County was 10.6 mg/L and the hardest 65.6 mg/L, a 6-fold gap. The top quarter of sites read above 1.5 gpg and the bottom quarter below 0.6 gpg.

Wells 3.8 gpg, rivers and lakes 0.6 gpg

1 groundwater samples from 1 wells put the median at 65.6 mg/L. 16 surface samples from 3 sites put it at 11 mg/L. In Polk County the wells come out 3.2 gpg harder. Groundwater sits in contact with rock for years and picks up calcium and magnesium as it goes, so wells usually read harder. A utility here that draws from the river can deliver noticeably different water from a private well next door.

Polk County against the rest of North Carolina

Among the 99 North Carolina counties with data, Polk County is number 85 of 99 counting from the hardest. Across the whole country it is harder than 3% of counties.

Softest in North Carolina: Bertie County at 0.3 gpg. Hardest: Dare County at 63.7 gpg. Closest to Polk County: Caldwell County (0.6), Graham County (0.6), Hoke County (0.6).