DirtyWaterWatch Public waters. Public record.

Maryland / Waters /

Jones Falls

Stream in Maryland, past Baltimore, Garrison, Pikesville and Towson

Current status

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.

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

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

Sources checked: Baltimore City DPW Sewer Overflow Map (SSO_Points2 map service) (last successful check 2026-11-03 08:17 UTC); MDE Reported Sewer Overflows (New for 2023), Maryland Open Data Portal (Socrata stgj-u72u) (last successful check 2026-11-03 08:17 UTC). Status by DirtyWaterWatch, updated 2026-11-03 08:50 UTC. · Updated

Estimated downstream stretches on Jones Falls

No downstream stretch has a current status here as of Nov 3, 2026, 3:50 AM EST. Check the reports below.

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
    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.

  • Caution: to
    2 reports: Baltimore City DPW 2
    Show records

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

  • Discharge or advisory reported: to
    2 reports: Baltimore City DPW 2
    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.

  • End not confirmed: to
    2 reports: Baltimore City DPW 2
    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.

  • End not confirmed: to
    2 reports: Baltimore City DPW 2
    Show records

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

  • Caution: to
    3 reports: Baltimore City DPW 3
    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.

  • Caution: to
    4 reports: Baltimore City DPW 4
    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.

  • 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 Jones Falls in Maryland, last 12 months2222 affecting this stretch: 22 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 Jones Falls in Maryland, last 12 months21Reported on the Jones Falls in Maryland: 21 · 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 Jones Falls in Maryland, last 12 months134Reported on the Jones Falls in Maryland: 134 · 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 Jones Falls in Maryland2.7%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 Jones Falls in Maryland10Reported on the Jones Falls in Maryland: 10 · 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.

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

112 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. 2 discharge reports have no end time and are not marked ongoing; under DirtyWaterWatch rules they show caution, not a discharge or advisory status, and add no hours here. 2 discharges reported to last more than 31 days are counted as 31 days.

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 111 reports that gave a volume as a number (1 did not).

  • Incomplete source coverage
Limited records

1 of 112 discharge reports gave no volume as a number; only numbers are summed.

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

2 discharge reports have no end time and are not marked ongoing; under DirtyWaterWatch rules they show caution, not a discharge or advisory status, and add no hours here. 2 discharges reported to last more than 31 days are counted as 31 days.

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

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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

2 discharge reports have no end time and are not marked ongoing; under DirtyWaterWatch rules they show caution, not a discharge or advisory status, and add no hours here. 2 discharges reported to last more than 31 days are counted as 31 days.

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: 10 of 80, 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 Jones Falls

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

Reports linked to Jones Falls, newest first
WhenReportStatus
to 5:50 PMBaltimore City DPW · SSO Site #72 428 E Preston St - SSO Site #72 · SSO · 1.34 million gallons in all mapended
to Oct 7, 12:47 PMBaltimore City DPW · N Howard St & Dolphin St · SSO · 24,170 gallons in all mapended
to 1:05 PMBaltimore City DPW · 3812 Greenspring Ave · SSO · 1,550 gallons in all mapended
to 6:48 PMBaltimore City DPW · 471 Old Town Mall · SSO · 3,880 gallons in all mapended
to 12:18 PMBaltimore City DPW · 3812 Greenspring Ave · SSO · 224 gallons in all mapended
Baltimore City DPW · 300 E 33rd St · SSO · 5 gallons report · notice · mapreported
Baltimore City DPW · 3603 Buena Vista Ave · SSO · 2 gallons report · notice · mapreported
to 9:00 AMBaltimore City DPW · 300 East 33rd St · SSO (earlier version) · 5 gallons report · notice · mapended
to 8:45 PMBaltimore City DPW · 301 E 22nd St · SSO · 1,020 gallons in all mapended
to 7:35 PMBaltimore City DPW · 3603 Buena Vista Ave · SSO · 140 gallons in all mapended
to 7:55 PMBaltimore City DPW · SSO Site #72 428 E Preston St - SSO Site #72 · SSO · 32,000 gallons in all mapended
to 8:20 PMBaltimore City DPW · N. Charles & Lafayette St · SSO · 9,900 gallons report · notice · mapended
to 6:40 PMBaltimore City DPW · SSO Site #152 N Charles St & W Lanvale St - SSO Site #152 · SSO · 22,015 gallons report · notice · mapended
to 7:05 PMBaltimore City DPW · N. Charles & W. Lanvalle St · SSO · 10,000 gallons report · notice · mapended
to 8:44 PMBaltimore City DPW · 2300 Cylburn Ave · SSO · 595 gallons report · notice · mapended
to 11:00 PMBaltimore City DPW · 1020 West 41st Street · SSO · 1,450 gallons report · notice · mapended
to 8:55 AMBaltimore City DPW · 428 East Preston St · SSO · 27,060 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

Showing the latest 25 records of 125 records.See them all with filters.

All reports in Maryland by year: 2026 (30 here) · 2025 (31 here) · 2024 (35 here) · 2023 (29 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

125 records linked to this water. Updated .