WINSLOW CITY OF
PWS ID: AZ0409035 · WINSLOW, Arizona 86047
Population Served
9,789
Total Violations
256
Health-Based Violations
6
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 3,267
- County
- Navajo
- School/Daycare
- No
- MCL Violations
- 6
- Monitoring Violations
- 189
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Consumer Confidence Rule | Other | 26 | 2024 |
| Chlorine | MR | 19 | 2025 |
| Coliform (TCR) | MR | 10 | 2014 |
| Total Haloacetic Acids (HAA5) | MR | 9 | 2025 |
| TTHM | MR | 7 | 2025 |
| Pentachlorophenol | MR | 7 | 2023 |
| 2,4-D | MR | 7 | 2023 |
| Coliform (TCR) | MCL | 6 | 2010 |
| Nitrate | MR | 5 | 2011 |
| Endothall | MR | 4 | 2001 |
| Di(2-ethylhexyl) adipate | MR | 4 | 2001 |
| OXAMYL | MR | 4 | 2001 |
| Simazine | MR | 4 | 2001 |
| Di(2-ethylhexyl) phthalate | MR | 4 | 2001 |
| Dinoseb | MR | 4 | 2001 |
| Hexachlorocyclopentadiene | MR | 4 | 2001 |
| Carbofuran | MR | 4 | 2001 |
| Atrazine | MR | 4 | 2001 |
| 2,3,7,8-TCDD | MR | 4 | 2001 |
| Heptachlor | MR | 4 | 2001 |
| 2,4,5-TP | MR | 4 | 2001 |
| HEXACHLOROBENZENE | MR | 4 | 2001 |
| Benzo(a)pyrene | MR | 4 | 2001 |
| ETHYLENE DIBROMIDE | MR | 4 | 2001 |
| Chlordane | MR | 4 | 2001 |
| Lead and Copper Rule | MR | 4 | 2023 |
| Endrin | MR | 4 | 2001 |
| Methoxychlor | MR | 4 | 2001 |
| Dalapon | MR | 4 | 2001 |
| Diquat | MR | 4 | 2001 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 60 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFNA | 9/9/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeA | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| lithium | 9/9/2025 | <9 µg/L | 9 µg/L | Not Detected |
| PFBS | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxS | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOS | 9/9/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOA | 9/9/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFDA | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDoA | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFUnA | 9/9/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 9/9/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 9Cl-PF3ONS | 9/9/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| ADONA | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBA | 9/9/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NMeFOSAA | 9/9/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| 6:2 FTS | 9/9/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMPA | 9/9/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 8:2 FTS | 9/9/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| HFPO-DA | 9/9/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 9/9/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| 4:2 FTS | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTA | 9/9/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFHpS | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeS | 9/9/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| NFDHA | 9/9/2025 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFEESA | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMBA | 9/9/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NEtFOSAA | 9/9/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 3/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NMeFOSAA | 3/5/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| NEtFOSAA | 3/5/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 3/5/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NFDHA | 3/5/2025 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| lithium | 3/5/2025 | <9 µg/L | 9 µg/L | Not Detected |
| PFTA | 3/5/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFHpS | 3/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeS | 3/5/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFMBA | 3/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeA | 3/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 3/5/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFEESA | 3/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 6:2 FTS | 3/5/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFOA | 3/5/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFBS | 3/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpA | 3/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxS | 3/5/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMPA | 3/5/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOS | 3/5/2025 | <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.