U.S. Navy installations (Annapolis, Indian Head, Patuxent River)
Sewer utility · Maryland · Annapolis, Indian Head, Lexington Park
Map sources: water outlines and launches from OpenBoatLaunch and OpenStreetMap contributors (Open Database License); wastewater outlets from EPA and state records; downstream estimates by DirtyWaterWatch using U.S. Geological Survey maps and flow data. Base map: OpenFreeMap and OpenMapTiles.
No outlet locations are in our records for this operator. Square boat markers mark boat launches listed by OpenBoatLaunch.
- Federal wastewater discharge permit (NPDES)
- MD0020095, MD0020885, MD0023523, MD0025119
- Wastewater outlets
- None with locations in our records
- Waters listed as receiving wastewater
- Mattawoman Creek; Goose Creek
- Tracked waters
- Mattawoman Creek, MD, Severn River, MD, Goose Creek, MD, Patuxent River, MD, St Marys River, MD, Chesapeake Bay, MD, Chesapeake Bay, MD, Potomac River, MD
- Discharge records counted
- 23 records · latest
- Total reported volume in these records
- 4,067,700 gallons across the 23 records that give a volume
These totals reflect the records we track. Missing volumes and gaps in reporting limit comparisons between operators.
Sources: EPA ECHO and the operator and state sources linked below. Counts use the discharge records on this page. Updated 2026-11-03 08:50 UTC.
Public notices and alerts
Pages where U.S. Navy installations (Annapolis, Indian Head, Patuxent River) or the state publishes its notices (check them for an alert sign-up):
Source: U.S. Navy installations (Annapolis, Indian Head, Patuxent River)'s public notice and alert pages and the state's notification records.
Report a missing notice or error
Wastewater outlets
Outfall: a pipe or outlet where wastewater enters a water body.
Reports and advisories
Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater.
| When | Report | Status |
|---|---|---|
| to Sep 18 ’25, 12:57 PM | Severn River · Halligan Rd & Gilmore Rd · SSO · 5,200 gallons report · notice · map | ended |
| to Aug 6 ’25, 3:00 PM | Goose Creek · 22894 Cedar Point Rd · SSO · 100 gallons report · notice · map | ended |
| to 11:10 AM | “Groundwater” · 22027 Cuddihy Road · SSO · 8,000 gallons report · notice · map | ended |
| to 3:00 PM | Patuxent River · 47042 Pate Rd · SSO · 100 gallons report · notice · map | ended |
| to 6:10 PM | Water not mapped · Manahan Road · SSO · 3,500 gallons report · notice | ended |
| to 11:00 AM | Mattawoman Creek · SSO · 12,000 gallons report · notice · map | ended |
| to 12:30 PM | “no” · Jackson & Strauss Rd · SSO · 300 gallons report · notice | ended |
| to 3:45 PM | “no” · SSO · 100 gallons report · notice | ended |
| to 6:45 AM | “no” · Hersey Road & Benson Rd · SSO (earlier version) · 100,500 gallons in all | ended |
| to 6:45 AM | “no” · Hersey Road & Benson Rd · SSO (earlier version) · 500 gallons report · notice | ended |
| to 6:45 AM | Mattawoman Creek · Hersey Road & Benson Rd · SSO · 100,000 gallons report · notice · map | ended |
| to 5:30 PM | “no” · Hersey Road · SSO · 500 gallons report · notice | ended |
| to 10:30 AM | “N/A” · 5111 Foxville Gardens · SSO · 30 gallons report · notice · map | ended |
| to 5:30 PM | “n/a” · 3838 Strauss Ave · SSO · 100,500 gallons report · notice | ended |
| to 3:30 PM | St Marys River · IronWood Way · SSO · 100 gallons report · notice · map | ended |
| to 1:58 PM | Severn River · 601 Brownson Rd · SSO · 40 gallons report · notice · map | ended |
| to Jan 30 ’24, 11:00 AM | Chesapeake Bay · Cedar Point Road Building 162 · SSO · 315,000 gallons report · notice · map | ended |
| to Jan 10 ’24, 1:00 AM | “n/a” · 3838 Strauss Ave · SSO · 500 gallons report · notice | ended |
| to 8:17 PM | “n/a” · 14913 Foxville Deerfield Rd. · SSO · 530 gallons report · notice · map | ended |
| to 2:30 PM | Severn River · 64 Greenbury Point Road · SSO · 800 gallons report · notice · map | ended |
| to Oct 30 ’23, 6:00 AM | Chesapeake Bay · 47123 Buse Rd · SSO · 5,000 gallons report · notice · map | ended |
| to Oct 19 ’23, 1:00 PM | Goose Creek · SSO · 14,000 gallons report · notice · map | ended |
| to 6:00 PM | “n/a” · 22027 Cuddihy Road · SSO · 400 gallons report · notice | ended |
| to Aug 29 ’23, 5:00 PM | Potomac River · Intersection of Ward Rd and Tisdale Rd, Indian Head, MD 20640 · SSO · 3.5 million gallons report · notice · map | ended |
| to 11:00 AM | “N/A” · 3972 Ward Road · SSO · 1,000 gallons report · notice | ended |
Sources: MDE Reported Sewer Overflows (New for 2023), Maryland Open Data Portal (Socrata stgj-u72u), retrieved 2026-11-03 08:17 UTC. A report's record id and times show when you hover or focus its "report" link.
All reports in Maryland by year: 2025 (7 from U.S. Navy installations (Annapolis, Indian Head, Patuxent River)) · 2024 (11 from U.S. Navy installations (Annapolis, Indian Head, Patuxent River)) · 2023 (6 from U.S. Navy installations (Annapolis, Indian Head, Patuxent River))
Other sewer operators on these waters
- Mattawoman Creek, MD: Charles County Department of Public Works (Mattawoman WWTP)
- Severn River, MD: Anne Arundel County Department of Public Works (Bureau of Utility Operations), City of Annapolis Department of Public Works
- Patuxent River, MD: American Water (Fort Meade WWTP), Anne Arundel County Department of Public Works (Bureau of Utility Operations), Howard County Department of Public Works (Little Patuxent WRP and collection system), WSSC Water (Washington Suburban Sanitary Commission), Calvert County Department of Public Works
- St Marys River, MD: St. Mary's County Metropolitan Commission (MetCom)
- Chesapeake Bay, MD: Anne Arundel County Department of Public Works (Bureau of Utility Operations), Kent County DPW, Baltimore County Department of Public Works and Transportation (sewer collection; flows to City plants), Town of Rock Hall
- Potomac River, MD: Charles County Department of Public Works (Mattawoman WWTP), District of Columbia Water and Sewer Authority (DC Water), Mayor and City Council of Cumberland (Water Reclamation Facility and combined sewer system), Town of Hancock, Washington County Department of Water Quality, WSSC Water (Washington Suburban Sanitary Commission), Allegany County Department of Public Works (CSO collection system and North Branch / Georges Creek sewers), Town of Westernport (former CSO permit), Maryland Water Service Utilities (Allegany County), St. Mary's County Metropolitan Commission (MetCom)
The last 90 days
No discharge, advisory or caution periods are shown for the waters this sewer operator's reports were placed on in this time span. Check downstream stretches and source coverage.
Source: DirtyWaterWatch calculations using the reports named above and the published status rules. Updated 2026-11-03 08:50 UTC.
Reported discharges over time
- Discharges reported by U.S. Navy installations (Annapolis, Indian Head, Patuxent River), last 12 months0December 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once.
- Days with a discharge reported by U.S. Navy installations (Annapolis, Indian Head, Patuxent River), last 12 months0December 2025 to November 2026A day counts once however many discharges were under way on it. Verified reports where available, else notices; revisions and duplicates counted once.
- Hours with a discharge or advisory status from U.S. Navy installations (Annapolis, Indian Head, Patuxent River)'s reports, last 12 months0December 2025 to November 2026Red hours by the map's rules: each discharge to its reported end plus the state's post-discharge period; overlapping hours count once.
- 2026 season with a discharge or advisory status (U.S. Navy installations (Annapolis, Indian Head, Patuxent River))0.0%May to October 2026Share of May 1 to October 31 hours with red status by the map's rules, of the hours a source covered.
Combined sewer overflow (CSO): sewage mixed with rainwater spills from a shared sewer system. Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater. Treatment bypass: wastewater skips one or more treatment steps. Blended discharge: wastewater that skipped some treatment is mixed with treated wastewater. Outfall: a pipe or outlet where wastewater enters a water body.
How these charts are counted
We count each discharge once. Where a source publishes notices and confirmed reports, we use confirmed reports for an operator's month when available; otherwise we use notices. We combine revisions and exclude duplicate state reports copied by the U.S. Environmental Protection Agency (EPA). Monthly and yearly totals appear separately. Status hours follow this site's rules. Shaded gaps mean missing coverage, not zero discharges.
- md-mde-overflows: records from January 4, 2023 to the latest update