ZIP Code 06016
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.
14
PFAS Detected
4
Above EPA Limits
2
Water Systems
215%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 200% of limit
Detected: 8.00 ppt
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 150% of limit
Detected: 6.00 ppt
CTWC - NORTHERN REG-WESTERN SYSTEM
CT0473011 High RiskWater Type
Groundwater
PFAS Detected
8
Above MCL
2
State
Connecticut
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 8.00ppt | 200% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOS Perfluorooctane sulfonic acid | 6.00ppt | 150% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 3.00ppt | 30% of limit
| 10 ppt | Below limit |
lithium | 19800.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 5.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 3.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 3.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 3.00ppt | No federal limit | — | Unregulated |
HAZARDVILLE WATER COMPANY
CT0490021 High RiskWater Type
Groundwater
PFAS Detected
6
Above MCL
2
State
Connecticut
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 8.60ppt | 215% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOS Perfluorooctane sulfonic acid | 5.40ppt | 135% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 8.10ppt | 81% of limit
| 10 ppt | Below limit |
PFBS Perfluorobutane sulfonic acid | 4.80ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 3.90ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 3.20ppt | No federal limit | — | Unregulated |
Note: ZIP code 06016 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.