How hard is the water in Charlotte County, FL?
26.7 grains per gallon
A softener will pay its way here.
The median hardness measured in Charlotte County, FL is 457 mg/L as calcium carbonate, which is 26.7 gpg. That is very hard on the USGS scale. It comes from 19 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 21 and 39 gpg. The whole middle of that range gives the same answer, so a test of your own tap is unlikely to change it. Confidence in the county figure: medium (how it is measured).
What to do next
At 26.7 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.
More on sizing a softener for your household.
From 16.0 to 247.7 gpg
The softest single sample on record in Charlotte County was 274 mg/L and the hardest 4,240 mg/L, a 15-fold gap. The top quarter of sites read above 39 gpg and the bottom quarter below 21 gpg.
Wells 26.7 gpg, rivers and lakes 13.9 gpg
19 groundwater samples from 17 wells put the median at 457 mg/L. 14 surface samples from 10 sites put it at 237.5 mg/L. In Charlotte County the wells come out 12.8 gpg harder. Groundwater sits in contact with rock for years and picks up calcium and magnesium as it goes, so wells usually read harder. 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 40,000-grain unit covers a week between regenerations. Expect about 583 lb of salt a year (15 bags of 40 lb, about $105), 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 $205 a year.
Sizing at 26.7 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 1,602 | 24,000 | 195 lb |
| 2 | 3,204 | 24,000 | 390 lb |
| 4 | 6,408 | 48,000 | 780 lb |
| 6 | 9,612 | 80,000 | 1,169 lb |
Charlotte County against the rest of Florida
Among the 67 Florida counties with data, Charlotte County is number 3 of 67 counting from the hardest. Across the whole country it is harder than 93% of counties.
Softest in Florida: Washington County at 0.3 gpg. Hardest: Sarasota County at 32.2 gpg. Closest to Charlotte County: Lee County (29.4), Sarasota County (32.2), St. Lucie County (21).