ZIP Code 19977
High RiskPFAS above EPA limits detected
2 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.
6
PFAS Detected
2
Above EPA Limits
2
Water Systems
245%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 245% of limit
Detected: 9.80 ppt
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 168% of limit
Detected: 6.70 ppt
GARRISON LAKE PUMP DISTRICT
DE0000004 Low LevelWater Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Delaware
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 16600.00ppt | No federal limit | — | Unregulated |
SMYRNA WATER DEPARTMENT
DE0000657 High RiskWater Type
Groundwater
PFAS Detected
5
Above MCL
2
State
Delaware
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 9.80ppt | 245% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOS Perfluorooctane sulfonic acid | 6.70ppt | 168% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFBS Perfluorobutane sulfonic acid | 6.90ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 4.70ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 4.50ppt | No federal limit | — | Unregulated |
Note: ZIP code 19977 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.