ZIP Code 29669
High RiskPFAS above EPA limits detected
3 compounds exceed EPA Maximum Contaminant Levels in water serving this ZIP code. Standard pitcher filters like Brita do not remove PFAS. See filter recommendations below.
11
PFAS Detected
3
Above EPA Limits
3
Water Systems
958%
Highest % of MCL
Compounds Exceeding EPA Limits
HFPO-DA Exceeds EPA limit
0 ppt MCL: 10 ppt 958% of limit
Detected: 95.80 ppt
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 218% of limit
Detected: 8.70 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 188% of limit
Detected: 7.50 ppt
WILLIAMSTON TOWN OF (0410010)
SC0410010 Low LevelWater Type
Surface Water
PFAS Detected
1
Above MCL
0
State
South Carolina
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFBS Perfluorobutane sulfonic acid | 3.40ppt | No federal limit | — | Unregulated |
BIG CREEK W/S DISTRICT (0420009)
SC0420009 Low LevelWater Type
Surface Water
PFAS Detected
1
Above MCL
0
State
South Carolina
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFBS Perfluorobutane sulfonic acid | 4.30ppt | No federal limit | — | Unregulated |
LAURENS COUNTY W&S COMM (SC3020001)
SC3020001 High RiskWater Type
Surface Water
PFAS Detected
9
Above MCL
3
State
South Carolina
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
HFPO-DA GenX (Hexafluoropropylene oxide dimer acid) | 95.80ppt | 958% of limit
| 10 ppt | ⚠ Exceeds MCL |
PFOS Perfluorooctane sulfonic acid | 8.70ppt | 218% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 7.50ppt | 188% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 3.10ppt | 31% of limit
| 10 ppt | Below limit |
PFPeA Perfluoropentanoic acid | 23.70ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 19.30ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 14.30ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 7.20ppt | No federal limit | — | Unregulated |
Show 1 more compound detected at low levels
| PFHpAPerfluoroheptanoic acid | 3.40 ppt | No federal limit |
Note: ZIP code 29669 is served by 3 separate water utilities.
Results above show data for each system independently.
Data source: EPA Unregulated Contaminant Monitoring Rule, 5th cycle (UCMR 5) — January 2026 release.
UCMR 5 tested ~10,000 public water systems serving more than 25 people between 2023-2025 for 29 PFAS compounds.
Detection values represent the highest single-sample result measured at entry points to the distribution system.