Largest public system
- Spartanburg Water: Disinfectant
- Free chlorine
- Spartanburg Water (Commissioners of Public Works of the City of Spartanburg), 2025
- Spartanburg Water: TTHM (disinfection byproducts)
- 44 ppb
- As reported (2025); federal limit 80 ppb.
- Spartanburg Water (Commissioners of Public Works of the City of Spartanburg), 2025
- Spartanburg Water: HAA5 (disinfection byproducts)
- 40 ppb
- As reported (2025); federal limit 60 ppb.
- Spartanburg Water (Commissioners of Public Works of the City of Spartanburg), 2025
- Spartanburg Water: Lead (at sampled homes' taps)
- 0 ppb
- 90th percentile of homes sampled (2025); 0 sampled homes above the action level. The federal action level is 15 ppb.
- Spartanburg Water (Commissioners of Public Works of the City of Spartanburg), 2025