CheckPFAS

ZIP Code 19520

High Risk
High Risk PFAS Risk Level

PFAS above EPA limits detected

1 compound 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
1
Above EPA Limits
1
Water System
1395%
Highest % of MCL

Compounds Exceeding EPA Limits

PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 1395% of limit
Detected: 55.80 ppt
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CAERNARVON TWP AUTH

PA3060052 High Risk
Water Type
Groundwater
PFAS Detected
6
Above MCL
1
State
Pennsylvania
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFOA
Perfluorooctanoic acid
55.80ppt
1395% of limit
4 ppt⚠ Exceeds MCL
PFHxA
Perfluorohexanoic acid
92.00pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
75.40pptNo federal limit—Unregulated
PFBA
Perfluorobutanoic acid
56.20pptNo federal limit—Unregulated
PFBS
Perfluorobutane sulfonic acid
29.00pptNo federal limit—Unregulated
PFHpA
Perfluoroheptanoic acid
23.10pptNo federal limit—Unregulated

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.

View raw EPA data →