NAVAL OBSERVATORY
PWS ID: DC0000005 · WASHINGTON, District of Columbia 20374
Population Served
250
Total Violations
25
Health-Based Violations
3
Water Source
Surface Water
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Federal
- Connections
- 29
- County
- District of Columbia
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 13
- Treatment Tech Violations
- 3
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 7 | 2015 |
| Public Notice | Other | 4 | 2016 |
| Revised Total Coliform Rule | RPT | 3 | 2025 |
| Long Term 2 Enhanced Surface Water Treatment Rule | TT | 3 | 2016 |
| Revised Total Coliform Rule | Other | 2 | 2016 |
| Long Term 2 Enhanced Surface Water Treatment Rule | MR | 2 | 2015 |
| Lead and Copper Rule | MR | 2 | 2016 |
| Chloramine | MR | 2 | 2010 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.