Well water hardness in South Carolina
Across 16 counties of South Carolina, the median well sampled by the USGS has 2.5 gpg of hardness. Counties range from 0.3 gpg (Richland County) to 9.9 gpg (Horry County).
Millions of American households drink water from their own well. No utility tests that water and no water quality report covers it. These pages summarise the hardness the U.S. Geological Survey measured in wells county by county, so you know what to expect before you test your own well.
Counties, hardest first
| gpg | mg/L | wells | ||
|---|---|---|---|---|
| Horry County | 9.9 | 170 | 12 | hard |
| Bamberg County | 7.6 | 130 | 19 | hard |
| Beaufort County | 7 | 120 | 67 | hard |
| Hampton County | 6.5 | 111 | 13 | moderately hard |
| Allendale County | 4.7 | 80 | 14 | moderately hard |
| Berkeley County | 3.9 | 66 | 17 | moderately hard |
| Orangeburg County | 3.6 | 62 | 61 | moderately hard |
| York County | 2.5 | 44 | 22 | soft |
| Colleton County | 2.4 | 42 | 16 | soft |
| Sumter County | 2.4 | 40 | 24 | soft |
| Charleston County | 2.2 | 38 | 32 | soft |
| Barnwell County | 1.3 | 23 | 76 | soft |
| Lexington County | 0.6 | 11 | 23 | soft |
| Florence County | 0.5 | 8 | 10 | soft |
| Darlington County | 0.3 | 6 | 13 | soft |
| Richland County | 0.3 | 5 | 46 | soft |
Counties with fewer than 10 sampled wells, or a median outside 5–500 mg/L, are not shown until the figure is reviewed.
South Carolina: tap water hardness by city → · Well water hardness by state and county →