ZIP Code 27504
High RiskPFAS above EPA limits detected
8 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.
32
PFAS Detected
8
Above EPA Limits
4
Water Systems
375%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 360% of limit
Detected: 14.40 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 300% of limit
Detected: 12.00 ppt
DUNN, CITY OF
NC0343010 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 | 14.40ppt | 360% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 12.00ppt | 300% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 5.20ppt | 52% of limit
| 10 ppt | Below limit |
PFPeA Perfluoropentanoic acid | 22.40ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 20.40ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 14.20ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 13.40ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 7.60ppt | No federal limit | — | Unregulated |
BENSON, TOWN OF
NC0351025 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 | 15.00ppt | 375% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 8.90ppt | 223% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 4.70ppt | 47% of limit
| 10 ppt | Below limit |
PFPeA Perfluoropentanoic acid | 12.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 12.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 7.80ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 7.20ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 4.90ppt | No federal limit | — | Unregulated |
JOHNSTON CO-WEST
NC0351070 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 | 14.10ppt | 353% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 7.60ppt | 190% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 5.30ppt | 53% of limit
| 10 ppt | Below limit |
PFBA Perfluorobutanoic acid | 15.60ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 9.20ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 9.20ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 5.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 4.50ppt | No federal limit | — | Unregulated |
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 |
Note: ZIP code 27504 is served by 4 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.