How hard is the water in Pinellas County, FL?
15 grains per gallon
A softener will pay its way here.
The median hardness measured in Pinellas County, FL is 256 mg/L as calcium carbonate, which is 15 gpg. That is very hard on the USGS scale. It comes from 143 samples at 35 sites between 1990 and 2016, 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 11.7 and 23.5 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: high (how it is measured).
What to do next
At 15 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 1.4 to 202.1 gpg
The softest single sample on record in Pinellas County was 24.8 mg/L and the hardest 3,460 mg/L, a 140-fold gap. The top quarter of sites read above 23.5 gpg and the bottom quarter below 11.7 gpg. So even here some sites draw water soft enough to need nothing at all.
Wells 15 gpg, rivers and lakes 8.6 gpg
143 groundwater samples from 35 wells put the median at 256 mg/L. 376 surface samples from 44 sites put it at 147.3 mg/L. In Pinellas County the wells come out 6.4 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 327 lb of salt a year (9 bags of 40 lb, about $59), 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 $159 a year.
Sizing at 15 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 900 | 24,000 | 110 lb |
| 2 | 1,800 | 24,000 | 219 lb |
| 4 | 3,600 | 32,000 | 438 lb |
| 6 | 5,400 | 40,000 | 657 lb |
Pinellas County against the rest of Florida
Among the 67 Florida counties with data, Pinellas County is number 20 of 67 counting from the hardest. Across the whole country it is harder than 69% of counties.
Softest in Florida: Washington County at 0.3 gpg. Hardest: Sarasota County at 32.2 gpg. Closest to Pinellas County: Miami-Dade County (14.9), Duval County (15.7), Orange County (15.8).