PlainWater

METROPOLITANO

PWS ID: PR0002591 · SAN JUAN, Puerto Rico 00901

PFAS Detected

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

Population Served
1,077,332
Total Violations
1,673
Health-Based Violations
774
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
403,495
County
San Juan Municipio
School/Daycare
No
MCL Violations
138
Monitoring Violations
838
Treatment Tech Violations
636

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Interim Enhanced Surface Water Treatment Rule TT 275 2025
Surface Water Treatment Rule TT 229 2018
CARBON, TOTAL TT 130 2016
Surface Water Treatment Rule MR 93 2025
Cryptosporidium MR 71 2017
E. COLI MR 71 2017
Turbidity MR 71 2017
TTHM MCL 62 2021
Total Haloacetic Acids (HAA5) MCL 40 2020
Lead and Copper Rule MR 35 2016
Coliform (TCR) MCL 34 2015
OXAMYL MR 19 2022
Carbofuran MR 17 2022
Nitrate MR 15 2024
Dalapon MR 14 2012
Picloram MR 14 2012
Dinoseb MR 14 2012
2,4,5-TP MR 14 2012
Pentachlorophenol MR 14 2012
2,4-D MR 14 2012
Endothall MR 13 2012
Di(2-ethylhexyl) adipate MR 13 2007
Di(2-ethylhexyl) phthalate MR 13 2007
Hexachlorocyclopentadiene MR 13 2007
Atrazine MR 13 2007
LASSO MR 13 2007
Benzo(a)pyrene MR 13 2007
1,2-DIBROMO-3-CHLOROPROPANE MR 13 2011
ETHYLENE DIBROMIDE MR 13 2011
Simazine MR 13 2007

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 25 of 600 samples detected PFAS.

Contaminant Date Result MRL Status
NFDHA 7/9/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFHxA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 7/9/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 7/9/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFDA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 7/9/2024 <9 µg/L 9 µg/L Not Detected
PFOA 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 7/9/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFBS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 7/9/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFPeA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 7/9/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFHpS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFEESA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFMPA 7/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
4:2 FTS 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 7/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 7/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 7/19/2024 <0.02 µg/L 0.02 µg/L Not Detected
9Cl-PF3ONS 7/19/2024 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 7/19/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 7/19/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 7/19/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 7/19/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 7/19/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 7/19/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 7/19/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 7/19/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 7/19/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFPeS 7/19/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 7/19/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMBA 7/19/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 7/19/2024 <0.008 µg/L 0.008 µg/L Not Detected
NMeFOSAA 7/19/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFUnA 7/19/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFPeA 7/19/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 7/19/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFHpA 7/19/2024 <0.003 µg/L 0.003 µg/L Not 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.