HAMPTON BAYS WATER DISTRICT
PWS ID: NY5103704 · HAMPTON BAYS, New York 11946
PFAS Detected
1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
12,500
Total Violations
106
Health-Based Violations
5
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 6,194
- County
- Suffolk
- School/Daycare
- No
- MCL Violations
- 5
- Monitoring Violations
- 93
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 5 | 2003 |
| Nitrate | MR | 3 | 2015 |
| Methoxychlor | MR | 3 | 2017 |
| Toxaphene | MR | 3 | 2017 |
| OXAMYL | MR | 3 | 2017 |
| Picloram | MR | 3 | 2017 |
| Dinoseb | MR | 3 | 2017 |
| Hexachlorocyclopentadiene | MR | 3 | 2017 |
| Aldicarb sulfone | MR | 3 | 2017 |
| Carbofuran | MR | 3 | 2017 |
| Aldicarb | MR | 3 | 2017 |
| Atrazine | MR | 3 | 2017 |
| LASSO | MR | 3 | 2017 |
| Heptachlor | MR | 3 | 2017 |
| 2,4-D | MR | 3 | 2017 |
| 2,4,5-TP | MR | 3 | 2017 |
| HEXACHLOROBENZENE | MR | 3 | 2017 |
| Pentachlorophenol | MR | 3 | 2017 |
| ETHYLENE DIBROMIDE | MR | 3 | 2017 |
| Chlordane | MR | 3 | 2017 |
| Revised Total Coliform Rule | MON | 3 | 2021 |
| BHC-GAMMA | MR | 3 | 2017 |
| Heptachlor epoxide | MR | 3 | 2017 |
| Di(2-ethylhexyl) phthalate | MR | 3 | 2017 |
| Benzo(a)pyrene | MR | 3 | 2017 |
| Consumer Confidence Rule | Other | 3 | 2004 |
| Endrin | MR | 3 | 2017 |
| Total Polychlorinated Biphenyls (PCB) | MR | 3 | 2017 |
| Coliform (TCR) | MR | 3 | 2014 |
| Dalapon | MR | 3 | 2017 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 1 of 300 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFUnA | 7/30/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFHxA | 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 |
| 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 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFNA | 7/30/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxS | 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 |
| 4:2 FTS | 7/30/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 11Cl-PF3OUdS | 7/30/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFHpA | 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 |
| 9Cl-PF3ONS | 7/30/2024 | <0.002 µg/L | 0.002 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 |
| 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 |
| 6:2 FTS | 7/30/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMBA | 7/30/2024 | <0.003 µg/L | 0.003 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 |
| ADONA | 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 |
| HFPO-DA | 7/30/2024 | <0.005 µg/L | 0.005 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 |
| PFOS | 7/30/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 9Cl-PF3ONS | 7/30/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFBA | 7/30/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 11Cl-PF3OUdS | 7/30/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMPA | 7/30/2024 | <0.004 µg/L | 0.004 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 |
| PFPeS | 7/30/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHpS | 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 |
| NFDHA | 7/30/2024 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFPeA | 7/30/2024 | <0.003 µg/L | 0.003 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 |
| 6:2 FTS | 7/30/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBS | 7/30/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 7/30/2024 | <0.003 µg/L | 0.003 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 |
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.