How hard is the water in Claiborne County, TN?
11.3 grains per gallon
A softener will pay its way here.
The median hardness measured in Claiborne County, TN is 193 mg/L as calcium carbonate, which is 11.3 gpg. That is very hard on the USGS scale. It comes from 8 samples at 7 sites between 1990 and 2019, drawn from groundwater wells, which is what most taps and private wells in the county draw on.
How much it varies here
Half the sites came in between 10.1 and 11.4 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: medium (how it is measured).
What to do next
At 11.3 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 Claiborne 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 9.1 to 12.6 gpg
The softest single sample on record in Claiborne County was 156 mg/L and the hardest 216 mg/L, a 1-fold gap. The top quarter of sites read above 11.4 gpg and the bottom quarter below 10.1 gpg.
Wells 11.3 gpg, rivers and lakes 10.5 gpg
8 groundwater samples from 7 wells put the median at 193 mg/L. 1,101 surface samples from 41 sites put it at 180 mg/L. In Claiborne County the wells come out 0.8 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.
What a softener would cost to run
For a household of 3, a 24,000-grain unit covers a week between regenerations. Expect about 246 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 11.3 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 678 | 24,000 | 82 lb |
| 2 | 1,356 | 24,000 | 165 lb |
| 4 | 2,712 | 24,000 | 330 lb |
| 6 | 4,068 | 32,000 | 495 lb |
Claiborne County against the rest of Tennessee
Among the 95 Tennessee counties with data, Claiborne County is number 20 of 95 counting from the hardest. Across the whole country it is harder than 56% of counties.
Softest in Tennessee: Fayette County at 0.5 gpg. Hardest: Fentress County at 42.9 gpg. Closest to Claiborne County: Robertson County (11.4), Trousdale County (11.6), Union County (11.7).