BUTTERMILK MD
PWS ID: CO0149160 · BASALT, Colorado 81621
Population Served
200
Total Violations
756
Health-Based Violations
4
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 64
- County
- Pitkin
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 731
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 26 | 2025 |
| Chlorine | MR | 25 | 2024 |
| Public Notice | Other | 16 | 2025 |
| Di(2-ethylhexyl) phthalate | MR | 15 | 2009 |
| Nitrate | MR | 14 | 2007 |
| Fluoride | MR | 13 | 2007 |
| Total Haloacetic Acids (HAA5) | MR | 13 | 2025 |
| Arsenic | MR | 12 | 2007 |
| Barium | MR | 12 | 2007 |
| Cadmium | MR | 12 | 2007 |
| Nickel | MR | 12 | 2007 |
| Antimony, Total | MR | 12 | 2007 |
| Thallium, Total | MR | 12 | 2007 |
| Chromium | MR | 12 | 2007 |
| Mercury | MR | 12 | 2007 |
| Selenium | MR | 12 | 2007 |
| Surface Water Treatment Rule | MR | 12 | 2024 |
| Beryllium, Total | MR | 12 | 2007 |
| Coliform (TCR) | MR | 10 | 2011 |
| TTHM | MR | 10 | 2025 |
| Revised Total Coliform Rule | MON | 10 | 2017 |
| Toluene | MR | 9 | 2009 |
| Ethylbenzene | MR | 9 | 2009 |
| Styrene | MR | 9 | 2009 |
| Endrin | MR | 9 | 2006 |
| BHC-GAMMA | MR | 9 | 2006 |
| Methoxychlor | MR | 9 | 2006 |
| Dalapon | MR | 9 | 2006 |
| Diquat | MR | 9 | 2006 |
| Picloram | MR | 9 | 2006 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.