Local water snapshot
City of Columbia
From its 2025 water quality report · read the full report
- Water source
- Broad River (via the Columbia Canal; Canal Plant) and Lake Murray (Lake Plant)
- City of Columbia serves about 354,068 people.
- City of Columbia Department of Utility Operations (Columbia Water), 2025
- Hardness
- 36 mg/L
- About 2.1 grains per gallon: soft by USGS classes. Average (2025).
- City of Columbia Department of Utility Operations (Columbia Water), 2025
- TTHM (disinfection byproducts)
- 30 ppb
- As reported (2025); federal limit 80 ppb.
- City of Columbia Department of Utility Operations (Columbia Water), 2025
- HAA5 (disinfection byproducts)
- 24 ppb
- As reported (2025); federal limit 60 ppb.
- City of Columbia Department of Utility Operations (Columbia Water), 2025
- Lead (at sampled homes' taps)
- 6 ppb
- 90th percentile of homes sampled (2023); 1 sampled home above the action level. The federal action level is 15 ppb.
- City of Columbia Department of Utility Operations (Columbia Water), 2025
- PFOA
- 5.8 ppt
- Average (2025). EPA's enforceable limit is 4.0 ppt.
- City of Columbia Department of Utility Operations (Columbia Water), 2025
- PFOS
- 7.6 ppt
- Average (2025). EPA's enforceable limit is 4.0 ppt.
- City of Columbia Department of Utility Operations (Columbia Water), 2025
- Violations
- None marked
- No violation is marked in the report's results tables.
- City of Columbia Department of Utility Operations (Columbia Water), 2025