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States → Puerto Rico

LAS PIEDRAS HUMACAO

PWS ID: PR0005376 · HUMACAO, Puerto Rico 00791

PFAS Detected

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

Population Served
36,032
Total Violations
259
Health-Based Violations
113
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
13,495
County
Humacao Municipio
School/Daycare
No
MCL Violations
5
Monitoring Violations
130
Treatment Tech Violations
108

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Interim Enhanced Surface Water Treatment Rule TT 99 2010
Cryptosporidium MR 27 2019
Turbidity MR 23 2019
E. COLI MR 23 2019
Lead and Copper Rule MR 18 2015
CARBON, TOTAL TT 9 2008
Coliform (TCR) MR 7 2014
Coliform (TCR) MCL 5 2015
Consumer Confidence Rule Other 4 2020
Surface Water Treatment Rule MR 3 2022
TTHM MR 2 2014
Antimony, Total MR 2 2014
Carbofuran MR 2 2021
OXAMYL MR 2 2021
Mercury MR 2 1984
Nitrate MR 2 1984
Barium MR 2 1984
Arsenic MR 2 1984
Fluoride MR 2 1984
Cadmium MR 2 1984
Selenium MR 2 1984
Chromium MR 2 1984
Public Notice Other 2 2019
Total Haloacetic Acids (HAA5) MR 2 2014
Combined Radium (-226 and -228) MR 1 1980
Gross Alpha, Excl. Radon and U MR 1 1980
Interim Enhanced Surface Water Treatment Rule MR 1 2004

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 4 of 180 samples detected PFAS.

Contaminant Date Result MRL Status
ADONA 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 7/30/2024 10.1700 µg/L 9 µg/L Detected
PFTA 7/30/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 7/30/2024 <0.007 µg/L 0.007 µg/L Not Detected
11Cl-PF3OUdS 7/30/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 7/30/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFBS 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 7/30/2024 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 7/30/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 7/30/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 7/30/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 7/30/2024 <0.004 µg/L 0.004 µg/L Not Detected
NEtFOSAA 7/30/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 7/30/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHxS 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 7/30/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpA 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 7/30/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 7/30/2024 <0.002 µg/L 0.002 µg/L Not Detected
9Cl-PF3ONS 7/30/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFDoA 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 7/30/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 7/30/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTA 7/30/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFPeA 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 7/30/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 7/30/2024 0.0052 µg/L 0.004 µg/L Detected
PFHxS 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 7/30/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 7/30/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 7/30/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 7/30/2024 <0.002 µg/L 0.002 µg/L Not Detected
4:2 FTS 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 7/30/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 7/30/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFMBA 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 7/30/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 7/30/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 7/30/2024 <0.005 µg/L 0.005 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.