CheckPFAS

ZIP Code 06042

High Risk
High Risk PFAS Risk Level

PFAS 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.

15
PFAS Detected
4
Above EPA Limits
2
Water Systems
400%
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

What this means for you

One or more PFAS compounds were measured above the EPA's enforceable drinking water limit at a utility serving ZIP 06042. The EPA set these limits because long-term exposure at higher concentrations is associated with health effects including immune suppression, thyroid changes, and cancer risk increases. Standard pitcher filters (Brita, PUR) are not certified to remove PFAS. The most reliable at-home options are under-sink reverse osmosis systems or activated carbon block filters with an NSF/ANSI 58 certification specifically listing PFOA/PFOS reduction. Your water utility is required to bring levels into compliance by 2029 — filtering at the tap is the practical interim step if you'd like additional protection now.

CTWC - NORTHERN REG-WESTERN SYSTEM

CT0473011 High Risk
Water Type
Groundwater
PFAS Detected
8
Above MCL
2
State
Connecticut
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
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 pptBelow limit
lithium
19800.00pptNo federal limitUnregulated
PFBA
Perfluorobutanoic acid
5.00pptNo federal limitUnregulated
PFBS
Perfluorobutane sulfonic acid
3.00pptNo federal limitUnregulated
PFPeA
Perfluoropentanoic acid
3.00pptNo federal limitUnregulated
PFHxA
Perfluorohexanoic acid
3.00pptNo federal limitUnregulated

MANCHESTER WATER DEPARTMENT

CT0770021 High Risk
Water Type
MX
PFAS Detected
7
Above MCL
2
State
Connecticut
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFOS
Perfluorooctane sulfonic acid
16.00ppt
400% of limit
4 ppt⚠ Exceeds MCL
PFOA
Perfluorooctanoic acid
13.00ppt
325% of limit
4 ppt⚠ Exceeds MCL
PFHxS
Perfluorohexane sulfonic acid
3.80ppt
38% of limit
10 pptBelow limit
PFBS
Perfluorobutane sulfonic acid
15.00pptNo federal limitUnregulated
PFHxA
Perfluorohexanoic acid
4.70pptNo federal limitUnregulated
PFPeA
Perfluoropentanoic acid
4.70pptNo federal limitUnregulated
PFHpA
Perfluoroheptanoic acid
3.50pptNo federal limitUnregulated
Note: ZIP code 06042 is served by 2 separate water utilities. Results above show data for each system independently.
About this data
Source
EPA UCMR 5 (Unregulated Contaminant Monitoring Rule, 5th cycle)
Data released
January 2026
Sampling period
January 2023 – December 2025
Systems tested
~10,000 public water systems serving > 25 people
Water systems (PWSID)
CT0473011, CT0770021
Detection threshold (MRL)
~1.5–2 ppt — "Not detected" means below this floor, not zero

Values shown are the highest single-sample concentration measured at entry points to the distribution system. Results reflect water quality at the treatment plant — aging pipes, building plumbing, and on-site storage can affect what actually reaches your tap.