NORTHROP GRUMMAN - UNDERSEA SYSTEMS
Maryland — Non-Transient Non-Community — PWSID: MD1020037
System Information
| PWSID | MD1020037 |
| System Name | NORTHROP GRUMMAN - UNDERSEA SYSTEMS |
| System Type | Non-Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 03 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 7, 1990 |
| Last Reported | Feb 26, 2026 |
Location & Contact
| State | Maryland |
| City | ANNAPOLIS |
| ZIP Code | 21409 |
| Address | 895 OCEANIC DRIVE |
| Organization | JOHNSON, OMUNIQUE |
| Phone | 410-260-5060 |
Population & Service
| Population Served | 395 |
| Service Connections | 4 |
Drinking Water Violations (21)
This water system has 21 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 2, 2025 | — | RPT | No | No | — | — | — | Resolved | Nov 7, 2025 | — | |
| Oct 1, 2018 | — | MR | No | No | — | TT | — | Resolved | Dec 20, 2018 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2013 | — | |
| Aug 1, 2000 | Aug 31, 2000 | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2000 | — | |
| Aug 1, 2000 | Aug 31, 2000 | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2000 | — | |
| Aug 1, 2000 | Aug 31, 2000 | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2000 | — | |
| Aug 1, 2000 | Aug 31, 2000 | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2000 | — | |
| Jan 1, 2000 | Dec 31, 2000 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2000 | — | |
| Jan 1, 2000 | Dec 31, 2000 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2000 | — | |
| Jan 1, 2000 | Dec 31, 2000 | MR | No | Yes | — | 1 mg/L | — | Resolved | Dec 31, 2000 | — | |
| Jan 1, 2000 | Dec 31, 2000 | MR | No | Yes | — | 1 mg/L | — | Resolved | Dec 31, 2000 | — | |
| Oct 1, 1992 | Dec 31, 1992 | MR | No | Yes | — | 5% of samples | — | Resolved | Dec 31, 1992 | — | |
| Oct 1, 1992 | Dec 31, 1992 | MR | No | Yes | — | 5% of samples | — | Resolved | Dec 31, 1992 | — | |
| Oct 1, 1992 | Dec 31, 1992 | MR | No | Yes | — | 5% of samples | — | Resolved | Dec 31, 1992 | — | |
| Oct 1, 1992 | Dec 31, 1992 | MR | No | Yes | — | 5% of samples | — | Resolved | Dec 31, 1992 | — | |
| Oct 1, 1992 | Dec 31, 1992 | MR | No | Yes | — | 5% of samples | — | Resolved | Dec 31, 1992 | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.