How hard is the water in Roanoke County, VA?
11.1 grains per gallon
A softener will pay its way here.
The median hardness measured in Roanoke County, VA is 190 mg/L as calcium carbonate, which is 11.1 gpg. That is very hard on the USGS scale. It comes from 156 samples at 14 sites between 1999 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 8.8 and 13.2 gpg. That spread crosses a decision line, so some homes here land on a different answer. A $10 test strip on your own tap settles it. Confidence in the county figure: high (how it is measured).
What to do next
At 11.1 gpg a softener pays its way here. Before you buy, check the quoted unit's grain capacity against the sizing table below, and ask whether it regenerates on demand, which uses less salt than a timer. Call your utility for its own report if you are on city water. Because Roanoke County straddles a decision line, check your own tap with a $10 test strip before you spend anything.
More on sizing a softener for your household.
From 0.3 to 25.3 gpg
The softest single sample on record in Roanoke County was 4.6 mg/L and the hardest 433 mg/L, a 94-fold gap. The top quarter of sites read above 13.2 gpg and the bottom quarter below 8.8 gpg. So even here some sites draw water soft enough to need nothing at all.
Wells 10.5 gpg, rivers and lakes 11.1 gpg
5 groundwater samples from 4 wells put the median at 180.5 mg/L. 151 surface samples from 10 sites put it at 190 mg/L. In Roanoke County the rivers and lakes come out 0.6 gpg harder. Here the surface water reads harder than the wells, which often points to streams fed by limestone springs or irrigation return flow. The two sources are close, so the county figure should hold whichever one your tap is on.
What a softener would cost to run
For a household of 3, a 24,000-grain unit covers a week between regenerations. Expect about 242 lb of salt a year (7 bags of 40 lb, about $44), and roughly 2,346 gallons of regeneration water. Installed, most units run $1,000 to $4,500; spread over 15 years with salt, that is about $144 a year.
Sizing at 11.1 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 666 | 24,000 | 81 lb |
| 2 | 1,332 | 24,000 | 162 lb |
| 4 | 2,664 | 24,000 | 324 lb |
| 6 | 3,996 | 32,000 | 486 lb |
Roanoke County against the rest of Virginia
Among the 126 Virginia counties with data, Roanoke County is number 14 of 126 counting from the hardest. Across the whole country it is harder than 55% of counties.
Softest in Virginia: Isle of Wight County at 0.4 gpg. Hardest: Clarke County at 20.1 gpg. Closest to Roanoke County: Giles County (11.2), Roanoke city (10.9), Virginia Beach city (10.3).