2 cities covered
South Carolina water quality and radon, by city
2 of 2 covered South Carolina cities use chloramine in at least part of the system, and 0 have hard water. 1 of South Carolina's 46 counties are EPA radon zone 1.
| City | Disinfectant | Hardness | Lead | PFAS | Radon |
|---|---|---|---|---|---|
| Charleston | Chloramine | 3.3 gpg | 3.5 ppb | PFOA, PFOS | Zone 3 |
| Columbia | Chloramine | 2.2 gpg | 5 ppb | PFOS, PFOA | Zone 3 |
South Carolina radon zones
Zone 1 (highest)1 counties
Zone 28 counties
Zone 3 (lowest)37 counties