Maryland / Waters /

Patapsco River

River in Maryland, past Baltimore, Brooklyn, Dundalk, Edgemere, Ellicott City, North Point Village, Pasadena, Rockwood Beach and Turner Station

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: Anne Arundel County Department of Health Recreational Water Closings and Advisories (last successful check 2026-11-03 02:32 UTC); 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 Patapsco 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: Oct 2, 2026, 4:00 PM EDT to Oct 5, 2026, 4:00 PM EDT
1 report: Howard County DPW 1
Show records

The records are also in the report table on this page.
Discharge or advisory reported: Oct 2, 2026, 12:00 PM EDT to Oct 2, 2026, 4:00 PM EDT
1 report: Howard County DPW 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 Patapsco River

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.

Reports linked to Patapsco River, newest first
When	Report	Status
Oct 21, 4:25 AMto Oct 22, 12:03 AM	Baltimore City DPW · 1510 Mosher Street · SSO (earlier version) · 125 gallons report · notice · map	ended
Oct 2, 12:30 PMto 3:20 PM	Howard County DPW · 3470 North Chatham Rd · SSO · 450 gallons report · notice · map	ended
Jul 18, 7:25 PMto 10:15 PM	Baltimore City DPW · 3501 Asiatic Ave · Bypass · 5 million gallons report · notice · map	ended
Jul 7, 4:20 AMto 5:50 AM	Baltimore City DPW · 3501 Asiatic Ave · Bypass · 2.77 million gallons report · notice · map	ended
Jul 5, 12:00 AMto Jul 6, 8:30 AM	Baltimore City DPW · 3501 Asiatic Ave · Bypass · 73.1 million gallons report · notice · map	ended
Jun 9, 8:50 PMto 10:30 PM	Baltimore City DPW · 1550 East Patapsco Ave · SSO · 6,000 gallons report · notice · map	ended
Jun 9, 8:03 PMto 10:00 PM	Baltimore County DPW · 1550 East Patapsco Ave · SSO · volume not reported report · notice · map	ended
Jun 9, 1:00 PMto Jun 10, 2:15 PM	Baltimore City DPW · 3501 Asiatic Ave · Bypass · 24 million gallons report · notice · map	ended
May 23, 5:00 AMto May 24, 4:00 AM	Baltimore City DPW · 3501 Asiatic Avenue · Bypass · 18.23 million gallons report · notice · map	ended
May 6, 10:42 PMto 10:43 PM	Anne Arundel County DPW · 60322 Cherry Ave. · SSO · 0 gallons report · notice · map	ended
Apr 6, 12:00 PMto 2:45 PM	Baltimore City DPW · 3501 Asiatic Ave · Bypass · 4 million gallons report · notice · map	ended
Apr 5, 5:20 PMto 10:20 PM	Baltimore City DPW · 3501 Asiatic Ave · Bypass · 6.8 million gallons report · notice · map	ended
Feb 15, 9:30 PMto 11:00 PM	Baltimore City DPW · 350 Asiatic Avenue · SSO · 4.37 million gallons report · notice · map	ended
Feb 12, 10:00 AMto 9:00 PM	Carroll County Bureau of Utilities · 7600 Main Street · SSO · 100,000 gallons report · notice · map	ended
Feb 9to Feb 17	Anne Arundel County Department of Health · Beach closure · volume not reported report · notice · map	lifted
Feb 9to Feb 16	Anne Arundel County Department of Health · Beach closure (earlier version) · volume not reported report · notice · map	listed
Feb 8, 2:19 PMto 8:00 PM	Anne Arundel County DPW · 6 Nursery Road · SSO · 37,325 gallons report · notice · map	ended
Dec 29 ’25to Jan 5	Anne Arundel County Department of Health · Beach closure · volume not reported report · notice · map	lifted
Dec 29 ’25to Jan 4	Anne Arundel County Department of Health · Beach closure (earlier version) · volume not reported report · notice · map	listed
Nov 14 ’25, 4:00 PMto 6:00 PM	Baltimore City DPW · SSO · 5,450 gallons report · notice · map	ended
Nov 14 ’25, 9:53 AMto 11:16 AM	Baltimore County DPW · Stansbury Road & Dunlin Drive · SSO · 2,320 gallons report · notice · map	ended
Oct 30 ’25, 12:45 PMto 2:15 PM	Baltimore City DPW · 3501 Asiatic Ave · Bypass · 200,000 gallons report · notice · map	ended
Oct 30 ’25, 9:20 AMto 11:20 AM	Baltimore City DPW · 428 E Preston Street · SSO · 10,000 gallons report · notice · map	ended
Oct 23 ’25, 3:22 AMto 4:22 AM	Baltimore County DPW · 3501 Asiatic Avenue · Bypass · 1.88 million gallons report · notice · map	ended
Oct 4 ’25, 7:30 AMto 10:45 AM	Baltimore City DPW · 3501 Asiatic Ave · SSO · 5,850 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; Anne Arundel County Department of Health Recreational Water Closings and Advisories, retrieved 2026-11-03 02:27 UTC. A report's record id and times show when you hover or focus its "report" link.

Download these reports as CSV

Showing the latest 25 records of 61 records.See them all with filters.

All reports in Maryland by year: 2026 (17 here) · 2025 (20 here) · 2024 (15 here) · 2023 (9 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

Daniels Area soft access, Ellicott City · Carry-in launch (canoe and kayak)
Fort Armistead, Baltimore · Boat ramp
Fort Howard Park, Baltimore · Boat ramp
Fort Smallwood Park boat ramps, Pasadena · Boat ramp
Fort Smallwood Park soft access, Pasadena · Carry-in launch (canoe and kayak)
Inverness Park, Dundalk · Boat ramp
Masonville Cove soft access, Baltimore · Carry-in launch (canoe and kayak)
Patapsco River Boat Launch near Dundalk · Boat ramp
Southwest Area Park, Brooklyn · Boat ramp
Turner Station Park · Boat ramp

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

Nearby waters

Middle Branch Patapsco River, MD No current status shown about 3 km away
Northwest Harbor, MD End not confirmed about 3 km away
Curtis Creek, MD No current status shown about 6 km away
Bear Creek, MD No current status shown about 9 km away
Bullneck Creek, MD No current status shown about 9 km away

Sources covering this water

Anne Arundel County Department of Health Recreational Water Closings and Advisories · Latest check succeeded · Last successful check: 2026-11-03 02:32 UTC
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

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