Western Branch Patuxent River

Stream in Maryland, past Upper Marlboro

No current status shown

No current status is assigned to this water outline. Check the water page for reports and any estimated downstream stretches. Why this status, and its source

This badge describes the water outline. Check the downstream stretches on the map and below for discharge statuses.

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.

Square boat markers mark boat launches listed by OpenBoatLaunch.

Bookmark this water page and check it before each trip · Report a missing notice or error

About this status

No current status shown: no report we track sets a status on this water now; how statuses work

Sources checked: MDE Reported Sewer Overflows (New for 2023), Maryland Open Data Portal (Socrata stgj-u72u) (last successful check 2026-11-03 02:31 UTC). Status by DirtyWaterWatch, updated 2026-11-03 02:43 UTC. · Updated Nov 2, 2026, 9:43 PM EST

Estimated downstream stretches on Western Branch Patuxent River

No downstream stretch has a current status here as of Nov 2, 2026, 9:43 PM EST. Check the reports below.

The last 90 days

Last 90 days, hour by hour. Red: discharge or advisory reported. Amber: caution. Hatched amber: end not confirmed. Grey: no current status on the water outline. Purple hatching: source update overdue.

Caution: Sep 19, 2026, 6:00 PM EDT to Sep 22, 2026, 6:00 PM EDT
1 report: WSSC 1
Show records

The records are also in the report table on this page.
Discharge or advisory reported: Sep 19, 2026, 1:00 PM EDT to Sep 19, 2026, 6:00 PM EDT
1 report: WSSC 1
Show records

The records are also in the report table on this page.
Caution: Sep 13, 2026, 3:00 PM EDT to Sep 16, 2026, 3:00 PM EDT
1 report: WSSC 1
Show records

The records are also in the report table on this page.
Discharge or advisory reported: Sep 13, 2026, 11:00 AM EDT to Sep 13, 2026, 3:00 PM EDT
1 report: WSSC 1
Show records

The records are also in the report table on this page.
Caution: Aug 10, 2026, 2:00 PM EDT to Aug 13, 2026, 2:00 PM EDT
1 report: WSSC 1
Show records

The records are also in the report table on this page.
Discharge or advisory reported: Aug 10, 2026, 11:00 AM EDT to Aug 10, 2026, 2:00 PM EDT
1 report: WSSC 1
Show records

The records are also in the report table on this page.

Source: DirtyWaterWatch calculations using the reports named above and the published status rules. Updated 2026-11-03 02:43 UTC.

Reported discharges over time

Historical charts are not available here. See the reports and sources on this page.

Reports linked to Western Branch Patuxent River

Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater.

Reports linked to Western Branch Patuxent River, newest first
When	Report	Status
Sep 19, 1:34 PMto 5:01 PM	Wssc · 8900 Crandall Road · SSO · 58 gallons report · notice · map	ended
Sep 13, 11:57 AMto 3:00 PM	Wssc · 1415 Pinelake Lane · SSO · 63 gallons report · notice · map	ended
Aug 10, 11:14 AMto 1:50 PM	Wssc · 3136 Pyles Drive · SSO · 78 gallons report · notice · map	ended
Mar 31, 11:33 AMto 2:20 PM	Wssc · 839 Commerce Drive · SSO · 53 gallons report · notice · map	ended
Mar 11, 6:22 PMto 8:15 PM	Wssc · 15404 Ravenglass Lane · SSO · 26 gallons report · notice · map	ended
Aug 27 ’25, 8:46 AMto 1:40 PM	Wssc · 11518 Bennington Drive · SSO · 702 gallons report · notice · map	ended
Dec 13 ’24, 3:36 PMto 9:00 PM	Wssc · 14500 Old Mill Rd · SSO (earlier version) · 480 gallons in all map	ended
Dec 13 ’24, 3:36 PMto 9:00 PM	Wssc · 14500 Old Mill Rd · SSO (earlier version) · 240 gallons report · notice · map	ended
Dec 13 ’24, 3:36 PMto 9:00 PM	Wssc · 14500 Old Mill Rd · SSO · 240 gallons report · notice · map	ended
Jun 7 ’24, 10:55 AMto 10:00 PM	Wssc · 13605 King Isles Court · SSO · 605 gallons report · notice · map	ended
Mar 12 ’24, 2:54 PMto 10:00 PM	Wssc · 9800 Summerton Drive · SSO · 366 gallons report · notice · map	ended
Feb 2 ’24, 2:36 PMto 4:45 PM	Wssc · 1017 Kings Heather Drive · SSO · 129 gallons report · notice · map	ended
Jan 22 ’24, 3:22 PMto 6:40 PM	Wssc · 109 Azalea Court · SSO · 198 gallons report · notice · map	ended

Sources: MDE Reported Sewer Overflows (New for 2023), Maryland Open Data Portal (Socrata stgj-u72u), retrieved 2026-11-03 02:31 UTC. A report's record id and times show when you hover or focus its "report" link.

Download these reports as CSV

All reports in Maryland by year: 2026 (5 here) · 2025 (1 here) · 2024 (6 here)

Wastewater outlets on this water

Outfall: a pipe or outlet where wastewater enters a water body.

No wastewater outlet in our records is linked to this water.

Boat launches

Iron Pot Landing, Upper Marlboro · Carry-in launch (canoe and kayak)
Mount Calvert Historical & Archaeological Park, Upper Marlboro · Carry-in launch (canoe and kayak)

Source: OpenBoatLaunch launch records (public agency data and OpenStreetMap, Open Database License). · Western Branch Patuxent River on OpenBoatLaunch

Nearby waters

Patuxent River, MD No current status shown about 4 km away
Watts Branch, DC No current status shown about 15 km away
Piney Run, DC No current status shown about 16 km away
Pope Branch, DC No current status shown about 17 km away
Anacostia River, MD No current status shown about 17 km away

Sources covering this water

MDE Reported Sewer Overflows (New for 2023), Maryland Open Data Portal (Socrata stgj-u72u) · Latest check succeeded · Last successful check: 2026-11-03 02:31 UTC

12 records linked to this water. Updated Nov 2, 2026, 9:43 PM EST.