PIEDRAS BLANCAS
PWS ID: PR0004474 · GUAYANILLA, Puerto Rico 00656
Population Served
3,391
Total Violations
50
Health-Based Violations
7
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,270
- County
- Guayanilla Municipio
- School/Daycare
- No
- MCL Violations
- 7
- Monitoring Violations
- 38
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 7 | 2007 |
| Lead and Copper Rule | MR | 4 | 2016 |
| Consumer Confidence Rule | Other | 4 | 2020 |
| TTHM | MR | 3 | 2014 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2014 |
| Coliform (TCR) | MR | 3 | 2014 |
| Methoxychlor | MR | 2 | 2019 |
| Heptachlor epoxide | MR | 2 | 2019 |
| Endrin | MR | 2 | 2019 |
| HEXACHLOROBENZENE | MR | 2 | 2019 |
| Total Polychlorinated Biphenyls (PCB) | MR | 2 | 2019 |
| Chlordane | MR | 2 | 2019 |
| BHC-GAMMA | MR | 2 | 2019 |
| Heptachlor | MR | 2 | 2019 |
| Toxaphene | MR | 2 | 2019 |
| Glyphosate | MR | 1 | 2019 |
| Hexachlorocyclopentadiene | MR | 1 | 2019 |
| Di(2-ethylhexyl) adipate | MR | 1 | 2019 |
| Benzo(a)pyrene | MR | 1 | 2019 |
| Simazine | MR | 1 | 2019 |
| LASSO | MR | 1 | 2019 |
| Atrazine | MR | 1 | 2019 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 60 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| ADONA | 8/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 8/20/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 8/20/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFUnA | 8/20/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFHxA | 8/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| HFPO-DA | 8/20/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFDA | 8/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 8/20/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFDoA | 8/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBA | 8/20/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 6:2 FTS | 8/20/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFOS | 8/20/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFMPA | 8/20/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 8:2 FTS | 8/20/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMBA | 8/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFEESA | 8/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 8/20/2024 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFPeS | 8/20/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHpS | 8/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 4:2 FTS | 8/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxS | 8/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 8/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 8/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFNA | 8/20/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeA | 8/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| lithium | 8/20/2024 | <9 µg/L | 9 µg/L | Not Detected |
| NMeFOSAA | 8/20/2024 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| NEtFOSAA | 8/20/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 8/20/2024 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFTA | 8/20/2024 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFDoA | 2/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 2/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFUnA | 2/20/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 2/20/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 9Cl-PF3ONS | 2/20/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| ADONA | 2/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| HFPO-DA | 2/20/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBA | 2/20/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 6:2 FTS | 2/20/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 2/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 2/20/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFPeA | 2/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| lithium | 2/20/2024 | <9 µg/L | 9 µg/L | Not Detected |
| PFBS | 2/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 2/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpS | 2/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 2/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFEESA | 2/20/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 2/20/2024 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFHxS | 2/20/2024 | <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.