PlainWater
States → Puerto Rico

U.C.P.R

PWS ID: PR0458104 · PONCE, Puerto Rico 00731

PFAS Detected

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

Population Served
7,416
Total Violations
617
Health-Based Violations
19
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
2,767
County
Ponce Municipio
School/Daycare
Yes
MCL Violations
16
Monitoring Violations
594
Treatment Tech Violations
3

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 15 2001
DICHLOROMETHANE MR 13 2000
Endrin MR 11 2000
Methoxychlor MR 11 2000
Toxaphene MR 11 2000
Dalapon MR 11 2000
Diquat MR 11 2000
Endothall MR 11 2000
Glyphosate MR 11 2000
Di(2-ethylhexyl) adipate MR 11 2000
OXAMYL MR 11 2000
Simazine MR 11 2000
Di(2-ethylhexyl) phthalate MR 11 2000
Picloram MR 11 2000
Dinoseb MR 11 2000
Hexachlorocyclopentadiene MR 11 2000
Carbofuran MR 11 2000
Atrazine MR 11 2000
LASSO MR 11 2000
Heptachlor epoxide MR 11 2000
2,4-D MR 11 2000
2,4,5-TP MR 11 2000
HEXACHLOROBENZENE MR 11 2000
Benzo(a)pyrene MR 11 2000
Pentachlorophenol MR 11 2000
1,2,4-Trichlorobenzene MR 11 2000
cis-1,2-Dichloroethylene MR 11 2000
Total Polychlorinated Biphenyls (PCB) MR 11 2000
1,2-DIBROMO-3-CHLOROPROPANE MR 11 2000
ETHYLENE DIBROMIDE MR 11 2000

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 8 of 60 samples detected PFAS.

Contaminant Date Result MRL Status
PFPeS 4/23/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxA 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 4/23/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 4/23/2024 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 4/23/2024 <0.002 µg/L 0.002 µg/L Not Detected
HFPO-DA 4/23/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 4/23/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 4/23/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 4/23/2024 <0.02 µg/L 0.02 µg/L Not Detected
lithium 4/23/2024 <9 µg/L 9 µg/L Not Detected
PFMPA 4/23/2024 <0.004 µg/L 0.004 µg/L Not Detected
4:2 FTS 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 4/23/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTA 4/23/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 4/23/2024 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 4/23/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFMBA 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 4/23/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 4/23/2024 0.0037 µg/L 0.003 µg/L Detected
PFHpA 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 4/23/2024 0.0043 µg/L 0.003 µg/L Detected
PFHxS 4/23/2024 0.0030 µg/L 0.003 µg/L Detected
PFNA 4/23/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 4/23/2024 0.0170 µg/L 0.004 µg/L Detected
NEtFOSAA 4/23/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTA 10/22/2024 <0.008 µg/L 0.008 µg/L Not Detected
NMeFOSAA 10/22/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFTrDA 10/22/2024 <0.007 µg/L 0.007 µg/L Not Detected
11Cl-PF3OUdS 10/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 10/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 10/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 10/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 10/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 10/22/2024 <9 µg/L 9 µg/L Not Detected
PFPeS 10/22/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 10/22/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 10/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 10/22/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 10/22/2024 0.0031 µg/L 0.003 µg/L Detected
8:2 FTS 10/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 10/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 10/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 10/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFOS 10/22/2024 0.0140 µg/L 0.004 µg/L Detected
PFHpA 10/22/2024 <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.