Colorado River Regional Water System
PWS ID: 090400051 · Parker, 09 85344
PFAS Detected
1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
8,490
Total Violations
132
Health-Based Violations
17
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 1,860
- School/Daycare
- No
- MCL Violations
- 10
- Monitoring Violations
- 28
- Treatment Tech Violations
- 7
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 9 | 2014 |
| Coliform (TCR) | MCL | 7 | 2015 |
| Total Haloacetic Acids (HAA5) | MR | 6 | 2021 |
| TTHM | MR | 6 | 2021 |
| Groundwater Rule | TT | 6 | 2014 |
| Consumer Confidence Rule | Other | 6 | 2006 |
| Nitrate | MR | 3 | 2021 |
| Lead and Copper Rule | MR | 3 | 2023 |
| Public Notice | Other | 3 | 2015 |
| Revised Total Coliform Rule | RPT | 3 | 2025 |
| TTHM | MCL | 2 | 2011 |
| Revised Total Coliform Rule | MCL | 1 | 2016 |
| Revised Total Coliform Rule | TT | 1 | 2020 |
| Revised Total Coliform Rule | MON | 1 | 2016 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 2 of 60 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFHpA | 7/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDoA | 7/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDA | 7/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFOA | 7/22/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOS | 7/22/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFNA | 7/22/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxS | 7/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 7/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTA | 7/22/2024 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFTrDA | 7/22/2024 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NEtFOSAA | 7/22/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFUnA | 7/22/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| lithium | 7/22/2024 | 96.0000 µg/L | 9 µg/L | Detected |
| 11Cl-PF3OUdS | 7/22/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| NMeFOSAA | 7/22/2024 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFEESA | 7/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpS | 7/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 7/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 7/22/2024 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFMBA | 7/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeA | 7/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFMPA | 7/22/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| 8:2 FTS | 7/22/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 6:2 FTS | 7/22/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFBA | 7/22/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| HFPO-DA | 7/22/2024 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| ADONA | 7/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 7/22/2024 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 4:2 FTS | 7/22/2024 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeS | 7/22/2024 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFBA | 1/8/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 11Cl-PF3OUdS | 1/8/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFUnA | 1/8/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFHxA | 1/8/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDoA | 1/8/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDA | 1/8/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTA | 1/8/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFOS | 1/8/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFTrDA | 1/8/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| PFNA | 1/8/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFBS | 1/8/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 1/8/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| PFOA | 1/8/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| NMeFOSAA | 1/8/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| NEtFOSAA | 1/8/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFHpA | 1/8/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 1/8/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFHxS | 1/8/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| lithium | 1/8/2025 | 150.0000 µg/L | 9 µg/L | Detected |
| PFHpS | 1/8/2025 | <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.