ZIP Code 06880
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.
13
PFAS Detected
4
Above EPA Limits
2
Water Systems
280%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 273% of limit
Detected: 10.90 ppt
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 165% of limit
Detected: 6.60 ppt
AQUARION WATER CO OF CT-MAIN SYSTEM
CT0150011 High RiskWater Type
Surface Water
PFAS Detected
7
Above MCL
2
State
Connecticut
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 10.90ppt | 273% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOS Perfluorooctane sulfonic acid | 6.60ppt | 165% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFBA Perfluorobutanoic acid | 7.60ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 7.40ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 6.70ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 4.10ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 3.90ppt | No federal limit | — | Unregulated |
NORWALK FIRST TAXING DISTRICT
CT1030011 High RiskWater Type
Surface Water
PFAS Detected
6
Above MCL
2
State
Connecticut
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 11.20ppt | 280% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 9.50ppt | 238% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 4.20ppt | 42% of limit
| 10 ppt | Below limit |
PFBS Perfluorobutane sulfonic acid | 6.40ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 5.40ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 4.80ppt | No federal limit | — | Unregulated |
Note: ZIP code 06880 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.