LAHAINA
PWS ID: HI0000214 · WAILUKU, Hawaii 96793-2155
Population Served
20,065
Total Violations
243
Health-Based Violations
116
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 3,236
- County
- Maui
- School/Daycare
- No
- MCL Violations
- 23
- Monitoring Violations
- 80
- Treatment Tech Violations
- 93
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | TT | 93 | 1997 |
| Surface Water Treatment Rule | MR | 29 | 1994 |
| Coliform (TCR) | MCL | 23 | 1997 |
| Dalapon | MR | 3 | 2008 |
| Picloram | MR | 3 | 2008 |
| Dinoseb | MR | 3 | 2008 |
| Pentachlorophenol | MR | 3 | 2008 |
| Di(2-ethylhexyl) adipate | MR | 3 | 2008 |
| Diquat | MR | 3 | 2008 |
| Endothall | MR | 3 | 2008 |
| Nitrate | MR | 3 | 2010 |
| Turbidity | MR | 3 | 2016 |
| E. COLI | MR | 3 | 2016 |
| 2,4,5-TP | MR | 3 | 2008 |
| CYANIDE | MR | 3 | 2008 |
| Di(2-ethylhexyl) phthalate | MR | 3 | 2008 |
| Coliform (TCR) | Other | 3 | 1994 |
| Cryptosporidium | MR | 3 | 2016 |
| 2,4-D | MR | 3 | 2008 |
| 2,3,7,8-TCDD | MR | 3 | 2008 |
| Benzo(a)pyrene | MR | 3 | 2008 |
| Coliform (Pre-TCR) | Other | 1 | 1982 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 575 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| NFDHA | 9/19/2023 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| ADONA | 9/19/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| HFPO-DA | 9/19/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBA | 9/19/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 6:2 FTS | 9/19/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 9/19/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 9/19/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMPA | 9/19/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeA | 9/19/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpS | 9/19/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFEESA | 9/19/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 9/19/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFPeS | 9/19/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxA | 9/19/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 9/19/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NMeFOSAA | 9/19/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| 11Cl-PF3OUdS | 9/19/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NEtFOSAA | 9/19/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 9/19/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFTA | 9/19/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| lithium | 9/19/2023 | <9 µg/L | 9 µg/L | Not Detected |
| PFBS | 9/19/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 9/19/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFNA | 9/19/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOS | 9/19/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOA | 9/19/2023 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFDA | 9/19/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDoA | 9/19/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxS | 9/19/2023 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFUnA | 9/19/2023 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| NEtFOSAA | 9/15/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NMeFOSAA | 9/15/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFTrDA | 9/15/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFTA | 9/15/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| lithium | 9/15/2023 | <9 µg/L | 9 µg/L | Not Detected |
| PFTrDA | 9/15/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| lithium | 9/15/2023 | <9 µg/L | 9 µg/L | Not Detected |
| PFTA | 9/15/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| NEtFOSAA | 9/15/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NMeFOSAA | 9/15/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFTA | 9/15/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| lithium | 9/15/2023 | <9 µg/L | 9 µg/L | Not Detected |
| PFTrDA | 9/15/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NEtFOSAA | 9/15/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NMeFOSAA | 9/15/2023 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| lithium | 9/15/2023 | <9 µg/L | 9 µg/L | Not Detected |
| PFTA | 9/15/2023 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFTrDA | 9/15/2023 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NEtFOSAA | 9/15/2023 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NMeFOSAA | 9/15/2023 | <0.006 µg/L | 0.006 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.