NORTHROP GRUMMAN - UNDERSEA SYSTEMS
PWS ID: MD1020037 · ANNAPOLIS, Maryland 21409
Population Served
395
Total Violations
20
Health-Based Violations
4
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 4
- County
- Anne Arundel
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 14
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 5 | 1992 |
| Coliform (TCR) | MCL | 4 | 2000 |
| Nitrite | MR | 2 | 2000 |
| TTHM | MR | 2 | 2011 |
| Nitrate | MR | 2 | 2000 |
| Total Haloacetic Acids (HAA5) | MR | 2 | 2011 |
| Lead and Copper Rule | MR | 1 | 2018 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.