City | AVG Hardness PPM / mg/L | AVG Hardness Grains per Gallon |
---|---|---|
Charleston | 58 | 3.4 |
Columbia | 34.5 | 2.1 |
Florence | 31 | 2 |
Greenville | 21 | 1 |
Mount Pleasant | 49 | 2.9 |
Mrytle Beach | 38 | 2 |
North Charleston | 58 | 3.4 |
Rock Hill | 28 | 1.7 |
Spartanburg | 32 | 2 |
Summerville | 21 | 1.3 |
Sumter | 19 | 1 |