ZIP Code 19701
High RiskPFAS above EPA limits detected
5 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.
23
PFAS Detected
5
Above EPA Limits
3
Water Systems
610%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 578% of limit
Detected: 23.10 ppt
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 150% of limit
Detected: 6.00 ppt
PFNA Exceeds EPA limit
0 ppt MCL: 10 ppt 116% of limit
Detected: 11.60 ppt
ARTESIAN WATER COMPANY
DE0000552 High RiskWater Type
Groundwater
PFAS Detected
8
Above MCL
2
State
Delaware
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 23.10ppt | 578% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOS Perfluorooctane sulfonic acid | 6.00ppt | 150% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 8.90ppt | 89% of limit
| 10 ppt | Below limit |
PFPeA Perfluoropentanoic acid | 106.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 79.10ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 72.20ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 18.90ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 8.70ppt | No federal limit | — | Unregulated |
SUEZ WATER DELAWARE
DE0000564 High RiskWater Type
Surface Water
PFAS Detected
9
Above MCL
2
State
Delaware
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 24.40ppt | 610% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFNA Perfluorononanoic acid | 11.60ppt | 116% of limit
| 10 ppt | ⚠ Exceeds MCL |
PFBA Perfluorobutanoic acid | 40.60ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 32.10ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 31.70ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 27.70ppt | No federal limit | — | Unregulated |
PFDA Perfluorodecanoic acid | 4.70ppt | No federal limit | — | Unregulated |
PFUnA Perfluoroundecanoic acid | 3.80ppt | No federal limit | — | Unregulated |
Show 1 more compound detected at low levels
| PFBSPerfluorobutane sulfonic acid | 3.70 ppt | No federal limit |
WILMINGTON WATER DEPARTMENT
DE0000663 High RiskWater Type
Surface Water
PFAS Detected
6
Above MCL
1
State
Delaware
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 9.90ppt | 248% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFPeA Perfluoropentanoic acid | 32.20ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 21.10ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 14.10ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 8.40ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 3.60ppt | No federal limit | — | Unregulated |
Note: ZIP code 19701 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.