ALLENSPARK WSD
PWS ID: CO0107115 · ALLENSPARK, Colorado 80510
Population Served
340
Total Violations
352
Health-Based Violations
11
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 122
- County
- Boulder
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 317
- Treatment Tech Violations
- 11
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Surface Water Treatment Rule | MR | 30 | 2022 |
| Chlorine | MR | 25 | 2022 |
| Lead and Copper Rule | MR | 21 | 2020 |
| Public Notice | Other | 20 | 2021 |
| E. COLI | MR | 15 | 2009 |
| Interim Enhanced Surface Water Treatment Rule | MR | 15 | 2017 |
| Coliform (TCR) | MR | 11 | 2007 |
| TTHM | MR | 10 | 2010 |
| Arsenic | MR | 8 | 2006 |
| Barium | MR | 8 | 2006 |
| Cadmium | MR | 8 | 2006 |
| Antimony, Total | MR | 8 | 2006 |
| Chromium | MR | 8 | 2006 |
| Thallium, Total | MR | 8 | 2006 |
| Mercury | MR | 8 | 2006 |
| Beryllium, Total | MR | 8 | 2006 |
| Selenium | MR | 8 | 2006 |
| Groundwater Rule | TT | 8 | 2020 |
| Ethylbenzene | MR | 7 | 2008 |
| Total Haloacetic Acids (HAA5) | MR | 7 | 2007 |
| Nitrate | MR | 5 | 2006 |
| Nickel | MR | 5 | 2006 |
| Fluoride | MR | 5 | 2006 |
| 1,2,4-Trichlorobenzene | MR | 4 | 2002 |
| cis-1,2-Dichloroethylene | MR | 4 | 2002 |
| Xylenes, Total | MR | 4 | 2002 |
| DICHLOROMETHANE | MR | 4 | 2002 |
| trans-1,2-Dichloroethylene | MR | 4 | 2002 |
| 1,2-Dichloroethane | MR | 4 | 2002 |
| 1,1,1-Trichloroethane | MR | 4 | 2002 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.