How hard is the water in Tazewell County, VA?
7.7 grains per gallon
A softener is worth it here.
The median hardness measured in Tazewell County, VA is 132 mg/L as calcium carbonate, which is 7.7 gpg. That is hard on the USGS scale. It comes from 354 samples at 24 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 6.4 and 8.8 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 7.7 gpg a softener is worth getting, mainly to protect the water heater and cut soap use. Get at least two quotes, ask each installer what grain capacity they are fitting, and check it against the sizing table below. Because Tazewell 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 0.1 to 12.5 gpg
The softest single sample on record in Tazewell County was 1.5 mg/L and the hardest 214 mg/L, a 143-fold gap. The top quarter of sites read above 8.8 gpg and the bottom quarter below 6.4 gpg. So even here some sites draw water soft enough to need nothing at all.
Wells 7.7 gpg, rivers and lakes 7.7 gpg
2 groundwater samples from 2 wells put the median at 131.5 mg/L. 352 surface samples from 22 sites put it at 132 mg/L. In Tazewell County the rivers and lakes come out 0.0 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 168 lb of salt a year (5 bags of 40 lb, about $30), 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 $130 a year.
Sizing at 7.7 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 462 | 24,000 | 56 lb |
| 2 | 924 | 24,000 | 112 lb |
| 4 | 1,848 | 24,000 | 225 lb |
| 6 | 2,772 | 24,000 | 337 lb |
Tazewell County against the rest of Virginia
Among the 126 Virginia counties with data, Tazewell County is number 29 of 126 counting from the hardest. Across the whole country it is harder than 41% of counties.
Softest in Virginia: Isle of Wight County at 0.4 gpg. Hardest: Clarke County at 20.1 gpg. Closest to Tazewell County: Northampton County (7.6), Augusta County (7.8), Rockbridge County (7.4).