Fairfield County Water Quality
Fairfield County, South Carolina: one city report built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.
Highest result for each contaminant
One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.
Perfluorooctanesulfonic acid (PFOS)WINNSBORO TOWN OF (2010001)4.0 ng/L federal MCL (2024) · US EPA32.8 ng/L
- WINNSBORO TOWN OF (2010001)32.8 ng/LSample date: 2024-03-04 to 2024-11-05
Perfluorohexanesulfonic acid (PFHxS)WINNSBORO TOWN OF (2010001)10 ng/L federal MCL (2024) · US EPA9 ng/L
- WINNSBORO TOWN OF (2010001)9 ng/LSample date: 2024-03-04 to 2024-11-05
Lead (90th percentile)WINNSBORO TOWN OF (2010001)15 µg/L federal action level · US EPA12 µg/L
- WINNSBORO TOWN OF (2010001)12 µg/LMonitoring period: 2025–2025
Perfluorohexanoic acid (PFHxA)WINNSBORO TOWN OF (2010001)400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLE3.8 ng/L
- WINNSBORO TOWN OF (2010001)3.8 ng/LSample date: 2024-03-04 to 2024-11-05
Perfluoropentanoic acid (PFPeA)WINNSBORO TOWN OF (2010001)No federal or state limit; shown for transparency3.8 ng/L
- WINNSBORO TOWN OF (2010001)3.8 ng/LSample date: 2024-03-04 to 2024-11-05
26 substances tested, none detected in this systemShow
Tested in this system: WINNSBORO TOWN OF (2010001)
- 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
- 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
- 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
- 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
- 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
- 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
- Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
- Lithium
- N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
- N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
- Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
- Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
- Perfluoro-3-methoxypropanoic acid (PFMPA)
- Perfluoro-4-methoxybutanoic acid (PFMBA)
- Perfluorobutanesulfonic acid (PFBS)
- Perfluorobutanoic acid (PFBA)
- Perfluorodecanoic acid (PFDA)
- Perfluorododecanoic acid (PFDoA)
- Perfluoroheptanesulfonic acid (PFHpS)
- Perfluoroheptanoic acid (PFHpA)
- Perfluorononanoic acid (PFNA)
- Perfluorooctanoic acid (PFOA)
- Perfluoropentanesulfonic acid (PFPeS)
- Perfluorotetradecanoic acid (PFTA)
- Perfluorotridecanoic acid (PFTrDA)
- Perfluoroundecanoic acid (PFUnA)
Cities ranked by the records
Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.
0of 1 city above the 15 µg/L action level
Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.
Lead in South CarolinaLargest water systems
- WinnsboroWINNSBORO TOWN OF (2010001) · SC201000110,391 served
Frequently asked
How does Fairfield County tap water compare across cities?
PurityMap ranks 1 city in Fairfield County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Winnsboro's main water system: WINNSBORO TOWN OF (2010001) · PWSID SC2010001 · Purity Score 43 (Poor) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.
How many Fairfield County cities had a PFAS sample above a 2024 EPA limit?
1 of 1 Fairfield County city report had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Winnsboro (PFOS 32.8 ng/L). That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. PFAS were detected at any level in 1.
Is there lead in Fairfield County tap water?
Utilities report lead as a 90th-percentile result from home taps. 1 of 1 Fairfield County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.
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