How hard is the water in Georgetown County, SC?
15.2 grains per gallon
A softener will pay its way here.
The median hardness measured in Georgetown County, SC is 260 mg/L as calcium carbonate, which is 15.2 gpg. That is very hard on the USGS scale. It comes from 306 samples at 49 sites between 1994 and 2026, drawn from every sampling site in the county, wells and surface water together.
How much it varies here
Half the sites came in between 1.3 and 64.3 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 15.2 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 Georgetown 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 0.3 to 216.1 gpg
The softest single sample on record in Georgetown County was 5 mg/L and the hardest 3,700 mg/L, a 740-fold gap. The top quarter of sites read above 64.3 gpg and the bottom quarter below 1.3 gpg. So even here some sites draw water soft enough to need nothing at all.
Wells 0.3 gpg, rivers and lakes 17.8 gpg
6 groundwater samples from 3 wells put the median at 5.5 mg/L. 300 surface samples from 46 sites put it at 305 mg/L. In Georgetown County the rivers and lakes come out 17.5 gpg harder. Here the surface water reads harder than the wells, which often points to streams fed by limestone springs or irrigation return flow. A utility here that draws from the aquifer 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 332 lb of salt a year (9 bags of 40 lb, about $60), 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 $160 a year.
Sizing at 15.2 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 912 | 24,000 | 111 lb |
| 2 | 1,824 | 24,000 | 222 lb |
| 4 | 3,648 | 32,000 | 444 lb |
| 6 | 5,472 | 40,000 | 666 lb |
Georgetown County against the rest of South Carolina
Among the 46 South Carolina counties with data, Georgetown County is the hardest. Across the whole country it is harder than 70% of counties.
Softest in South Carolina: Aiken County at 0.2 gpg. Closest to Georgetown County: Beaufort County (7.9), Jasper County (6.5), Hampton County (6.4).