How hard is the water in Columbia County, FL?
10 grains per gallon
A softener is worth it here.
The median hardness measured in Columbia County, FL is 171 mg/L as calcium carbonate, which is 10 gpg. That is hard on the USGS scale. It comes from 137 samples at 22 sites between 1993 and 2017, 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 9.1 and 11.7 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 10 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 Columbia 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 6.2 to 16.4 gpg
The softest single sample on record in Columbia County was 106 mg/L and the hardest 280.4 mg/L, a 3-fold gap. The top quarter of sites read above 11.7 gpg and the bottom quarter below 9.1 gpg.
Wells 10 gpg, rivers and lakes 2.4 gpg
137 groundwater samples from 22 wells put the median at 171.3 mg/L. 208 surface samples from 53 sites put it at 41.6 mg/L. In Columbia County the wells come out 7.6 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.
What a softener would cost to run
For a household of 3, a 24,000-grain unit covers a week between regenerations. Expect about 219 lb of salt a year (6 bags of 40 lb, about $39), 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 $139 a year.
Sizing at 10 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 600 | 24,000 | 73 lb |
| 2 | 1,200 | 24,000 | 146 lb |
| 4 | 2,400 | 24,000 | 292 lb |
| 6 | 3,600 | 32,000 | 438 lb |
Columbia County against the rest of Florida
Among the 67 Florida counties with data, Columbia County is number 32 of 67 counting from the hardest. Across the whole country it is harder than 51% of counties.
Softest in Florida: Washington County at 0.3 gpg. Hardest: Sarasota County at 32.2 gpg. Closest to Columbia County: Madison County (9.8), Jefferson County (9.6), Citrus County (10.5).