DirtyWaterWatch Public waters. Public record.

Maryland / Waters /

Dead Run

Stream in Maryland, past Baltimore, Lochearn, Milford Mill and Woodlawn

Current status

Caution

Caution applies after a recent discharge, when a report leaves its status unclear, or during a rainfall advisory. The report explains which rule applies. This status since . Why this status, and its source

This status counts every report affecting this water, including discharges arriving from upstream.

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.

Dashed river stretches are estimates.

Check Baltimore City Department of Public Works (separate sanitary system; Back River and Patapsco WWTPs)'s notices · Bookmark this water page and check it before each trip · Report a missing notice or error

About this status

Caution: discharge record with unclear status; caution for 14 days, then shown as unconfirmed (site rule)

Source: Baltimore City Department of Public Works (Sewer Overflow Map) via Baltimore City DPW Sewer Overflow Map (SSO_Points2 map service), record 25967, the source gives no report time, retrieved 2026-11-03 08:17 UTC · Original notice · Updated

Reports behind this status

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

Reports behind the status of Dead Run, newest first
WhenReportStatus
Baltimore City DPW · 619 Nottingham Rd · SSO · 5 gallons report · notice · mapto Nov 15, 3:50 PM

Sources: Baltimore City DPW Sewer Overflow Map (SSO_Points2 map service), retrieved 2026-11-03 08:17 UTC. A report's record id and times show when you hover or focus its "report" link.

Estimated downstream stretches on Dead Run

Estimated downstream stretch — not checked by water sampling. Estimated by DirtyWaterWatch using U.S. Geological Survey river maps and flow measurements; not an official advisory area.

Estimated routes below wastewater outlets

Source: DirtyWaterWatch estimates using U.S. Geological Survey river maps and flow measurements. The estimate stops at tidal water, the first lake or the distance limit.

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: to the latest update
    1 report: Baltimore City DPW 1
    Show records

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

  • Caution: to
    1 report: Baltimore City DPW 1
    Show records

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

  • Discharge or advisory reported: to
    1 report: Baltimore City 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 08:50 UTC.

Reported discharges over time

  • Discharges affecting the Dead Run in Maryland, last 12 months44 affecting this stretch: 4 reported in Maryland, none arriving from upstreamDecember 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once. Arriving discharges are estimated from modeled downstream reaches.
  • Days with a discharge affecting the Dead Run in Maryland, last 12 months5Reported on the Dead Run in Maryland: 5 · Arriving from outfalls upstream, estimated: 0December 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 on the Dead Run in Maryland, last 12 months33Reported on the Dead Run in Maryland: 33 · Arriving from outfalls upstream, estimated: 0December 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 on the Dead Run in Maryland0.1%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.
  • Records behind the last-90-days strip for the Dead Run in Maryland2Reported on the Dead Run in Maryland: 2 · Arriving from outfalls upstream, estimated: 0last 90 daysEvery distinct record the strip lists for its red, yellow and unresolved hours, notices and unresolved reports included; counted as the strip counts them.

This record covers the Dead Run within Maryland; the same river upstream is a separate record.

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.

Reported discharges per month

8 reported discharges, January 2022 to November 2026.

  • Combined sewer overflow
  • Sanitary sewer overflow
  • Treatment bypass, blended or other
  • No tracked source for this period
  • Incomplete source coverage
No tracked source

No tracked source covers January 2022 to December 2022.

Sources: md-baltimore-sso; md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.

Show table

Hours with a discharge or advisory status per month

Hours when this water had a discharge or advisory status under DirtyWaterWatch rules.

  • Discharge or advisory reported
  • No tracked source for this period
  • Incomplete source coverage
No tracked source

No tracked source covers January 2022 to December 2022. 1 discharge report has no end time and is not marked ongoing; under DirtyWaterWatch rules it shows caution, not a discharge or advisory status, and adds no hours here.

Sources: md-baltimore-sso; md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.

Show table

Days with a reported discharge per month

A day counts when any counted discharge was under way on it, from its start to its reported end in Eastern Time; a report with no end counts its start day.

  • No tracked source for this period
  • Incomplete source coverage
No tracked source

No tracked source covers January 2022 to December 2022.

Sources: md-baltimore-sso; md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.

Show table

Reported volume per year

Gallons (axis: K thousand, M million), summed from the 8 reports that gave a volume as a number.

  • Incomplete source coverage
Limited records

Sources: md-baltimore-sso; md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.

Show table

Hours with a discharge or advisory status per year

Hours with a discharge or advisory status each year under DirtyWaterWatch rules; 2026 to date.

  • Discharge or advisory reported
  • Incomplete source coverage
Limited records

1 discharge report has no end time and is not marked ongoing; under DirtyWaterWatch rules it shows caution, not a discharge or advisory status, and adds no hours here.

Sources: md-baltimore-sso; md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.

Show table

Share of the May to October season with a discharge or advisory status

Share of the hours from May 1 to October 31 with a discharge or advisory status under DirtyWaterWatch rules.

  • Discharge or advisory reported

1 discharge report has no end time and is not marked ongoing; under DirtyWaterWatch rules it shows caution, not a discharge or advisory status, and adds no hours here.

Sources: md-baltimore-sso; md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.

Show table

Reported discharges by calendar month, all years

Every counted discharge report, by the calendar month it began.

Months are summed over every year a tracked source covers; the table gives the number of years behind each month.

Sources: md-baltimore-sso; md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.

Show table

Reported discharges by wastewater outlet

Wastewater outlets with the most tracked discharge records: 8 of 8, all years. Counts depend on reporting coverage and do not measure legal compliance or harm.

Sources: md-baltimore-sso; md-mde-overflows. Records cover January 4, 2023 to November 3, 2026.

Show table
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-baltimore-sso: records from June 23, 2024 to the latest update
  • md-mde-overflows: records from January 4, 2023 to the latest update

Reports linked to Dead Run

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

Reports linked to Dead Run, newest first
WhenReportStatus
Baltimore City DPW · 619 Nottingham Rd · SSO · 5 gallons report · notice · mapto Nov 15, 3:50 PM
to 5:30 PMBaltimore City DPW · 714 Brookwood Rd · SSO · 3,960 gallons in all mapended
to 4:15 PMBaltimore County DPW · 5521 Windsor Mill Rd · SSO · 75 gallons report · notice · mapended
to Jan 28, 2:30 PMBaltimore City DPW · 5005 Ashman's Hope · SSO · 31,400 gallons report · notice · mapended
to 6:16 PMBaltimore County DPW · 6401 Dogwood Road · SSO · 10 gallons report · notice · mapended
to 10:00 PMBaltimore County DPW · 7210 Windsor Mill Road · SSO · 40 gallons report · notice · mapended
to 11:30 PMBaltimore County DPW · 1125 Stamford Rd · SSO · 75 gallons report · notice · mapended
to Aug 19 ’23, 8:30 AMBaltimore County DPW · 1631 Ingleside Avenue · SSO · 120 gallons report · notice · mapended

Sources: Baltimore City DPW Sewer Overflow Map (SSO_Points2 map service), retrieved 2026-11-03 08:17 UTC; 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.

Download these reports as CSV

All reports in Maryland by year: 2026 (5 here) · 2024 (3 here) · 2023 (1 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.

Sewer operators listed for this water: Baltimore City Department of Public Works (separate sanitary system; Back River and Patapsco WWTPs), Baltimore County Department of Public Works and Transportation (sewer collection; flows to City plants).

Boat launches

No public boat launch is listed in our records for this water.

Nearby waters

Sources covering this water

9 records linked to this water. Updated .