ZIP Code 27557
High RiskPFAS above EPA limits detected
4 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
4
Above EPA Limits
2
Water Systems
255%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 243% of limit
Detected: 9.70 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 193% of limit
Detected: 7.70 ppt
JOHNSTON CO-EAST
NC4051018 High RiskWater Type
Surface Water
PFAS Detected
8
Above MCL
2
State
North Carolina
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 9.70ppt | 243% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 7.70ppt | 193% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 3.80ppt | 38% of limit
| 10 ppt | Below limit |
PFBA Perfluorobutanoic acid | 14.40ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 8.20ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 7.80ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 5.50ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 3.30ppt | No federal limit | — | Unregulated |
CENTRAL NASH WATER & SEWER
NC4064005 High RiskWater Type
Surface Water
PFAS Detected
3
Above MCL
2
State
North Carolina
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 10.20ppt | 255% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 6.30ppt | 158% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFBA Perfluorobutanoic acid | 6.20ppt | No federal limit | — | Unregulated |
Note: ZIP code 27557 is served by 2 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.