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PHILADELPHIA WATER DEPARTMENT

PWS ID: PA1510001 · PHILADELPHIA, Pennsylvania 19107

PFAS Detected

8 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
1,600,000
Total Violations
130
Health-Based Violations
23
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
524,021
County
Philadelphia
School/Daycare
No
MCL Violations
0
Monitoring Violations
103
Treatment Tech Violations
23

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Interim Enhanced Surface Water Treatment Rule MR 69 2025
Surface Water Treatment Rule TT 17 2010
Surface Water Treatment Rule MR 11 2008
CARBON, TOTAL TT 6 2003
CARBON, TOTAL MR 5 2005
Total Haloacetic Acids (HAA5) MR 3 2003
Endothall MR 3 2003
Coliform (TCR) MR 3 2004
Nitrate MR 3 2006
Consumer Confidence Rule Other 3 2007
Chlorine MR 2 2003
Benzo(a)pyrene MR 1 2003
Lead and Copper Rule MR 1 1992
Gross Beta Particle Activity MR 1 1979
38-STRONTIUM-90 MR 1 1979

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 50 of 360 samples detected PFAS.

Contaminant Date Result MRL Status
PFUnA 8/5/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHpS 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/5/2024 0.0030 µg/L 0.003 µg/L Detected
PFHxS 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 8/5/2024 0.0045 µg/L 0.004 µg/L Detected
PFOS 8/5/2024 0.0052 µg/L 0.004 µg/L Detected
PFOA 8/5/2024 0.0074 µg/L 0.004 µg/L Detected
PFDA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 8/5/2024 0.0084 µg/L 0.003 µg/L Detected
PFPeS 8/5/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFBA 8/5/2024 0.0062 µg/L 0.005 µg/L Detected
9Cl-PF3ONS 8/5/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFDoA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 8/5/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/5/2024 0.0090 µg/L 0.003 µg/L Detected
PFMPA 8/5/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 8/5/2024 0.0065 µg/L 0.003 µg/L Detected
ADONA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/5/2024 0.0066 µg/L 0.003 µg/L Detected
PFHpS 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/5/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 8/5/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/5/2024 0.0099 µg/L 0.003 µg/L Detected
PFMPA 8/5/2024 <0.004 µg/L 0.004 µg/L Not Detected
4:2 FTS 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 8/5/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 8/5/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 8/5/2024 0.0091 µg/L 0.003 µg/L Detected
PFDoA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/5/2024 0.0081 µg/L 0.004 µg/L Detected
PFOS 8/5/2024 0.0060 µg/L 0.004 µg/L Detected
PFNA 8/5/2024 0.0045 µg/L 0.004 µg/L Detected
PFHxS 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/5/2024 0.0033 µg/L 0.003 µg/L Detected
PFBA 8/5/2024 0.0068 µg/L 0.005 µg/L Detected
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.