How hard is the water in Dinwiddie County, VA?

1.3 grains per gallon

You do not need a softener here.

The median hardness measured in Dinwiddie County, VA is 22 mg/L as calcium carbonate, which is 1.3 gpg. That is soft on the USGS scale. It comes from 305 samples at 22 sites between 1998 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 1.1 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 1.3 gpg the most a softener would fix is the odd water spot. If a salesperson in Dinwiddie 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 14.7 gpg

The softest single sample on record in Dinwiddie County was 7.7 mg/L and the hardest 251 mg/L, a 33-fold gap. The top quarter of sites read above 1.8 gpg and the bottom quarter below 1.1 gpg. So even in a soft county, a handful of wells here produce water hard enough to scale a heater.

Wells 9.2 gpg, rivers and lakes 1.3 gpg

2 groundwater samples from 2 wells put the median at 157.3 mg/L. 303 surface samples from 20 sites put it at 21.4 mg/L. In Dinwiddie County the wells come out 7.9 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.

Dinwiddie County against the rest of Virginia

Among the 126 Virginia counties with data, Dinwiddie County is number 96 of 126 counting from the hardest. Across the whole country it is harder than 10% of counties.

Softest in Virginia: Isle of Wight County at 0.4 gpg. Hardest: Clarke County at 20.1 gpg. Closest to Dinwiddie County: Appomattox County (1.3), Brunswick County (1.3), Caroline County (1.3).