How hard is the water in Bedford County, TN?
8.5 grains per gallon
A softener is worth it here.
The median hardness measured in Bedford County, TN is 146 mg/L as calcium carbonate, which is 8.5 gpg. That is hard on the USGS scale. It comes from 30 samples at 17 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 6.7 and 10 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 8.5 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 Bedford 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 4.0 to 18.8 gpg
The softest single sample on record in Bedford County was 68.5 mg/L and the hardest 322 mg/L, a 5-fold gap. The top quarter of sites read above 10 gpg and the bottom quarter below 6.7 gpg.
Wells 8.5 gpg, rivers and lakes 8.9 gpg
30 groundwater samples from 17 wells put the median at 146 mg/L. 270 surface samples from 52 sites put it at 152 mg/L. In Bedford County the rivers and lakes come out 0.4 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 186 lb of salt a year (5 bags of 40 lb, about $34), 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 $134 a year.
Sizing at 8.5 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 510 | 24,000 | 62 lb |
| 2 | 1,020 | 24,000 | 124 lb |
| 4 | 2,040 | 24,000 | 248 lb |
| 6 | 3,060 | 24,000 | 372 lb |
Bedford County against the rest of Tennessee
Among the 95 Tennessee counties with data, Bedford County is number 37 of 95 counting from the hardest. Across the whole country it is harder than 45% of counties.
Softest in Tennessee: Fayette County at 0.5 gpg. Hardest: Fentress County at 42.9 gpg. Closest to Bedford County: Monroe County (8.4), Montgomery County (8.6), Overton County (8.6).