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Michigan / Waters /

Flint River

River in Michigan, past Flint, Flushing and Montrose

Current status

End not confirmed

A discharge was reported, and we have not found an end time in the sources we track. This status since . Why this status, and its source

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.

Check City of Flint's notices · Bookmark this water page and check it before each trip · Report a missing notice or error

About this status

End not confirmed: no end time reported; shown as unconfirmed from day 7 to day 30 (site rule)

Source: Michigan EGLE (MiEnviro CSO/SSO List) via EGLE MiEnviro CSO/SSO List, record -68108936015…, reported Oct 23, 2026, 11:29 AM EDT, retrieved 2026-11-05 01:07 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 Flint River, newest first
WhenReportStatus
City of Flint · SSO · volume not reported report · notice · mapto Nov 22, 10:00 AM

Sources: EGLE MiEnviro CSO/SSO List, retrieved 2026-11-05 01:07 UTC. A report's record id and times show when you hover or focus its "report" link.

The last 90 days

Last 90 days, hour by hour. Red: discharge or advisory reported. Amber: caution. Hatched amber: end not confirmed. Plum: algal bloom advisory. Red or amber with a light line inside: beach advisory or caution. Dotted: monthly report (days with discharge, dates not given). Grey: no current status on the water outline. Purple hatching: source update overdue.
  • End not confirmed: to the latest update
    1 report: City of Flint 1
    Show records

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

  • Discharge or advisory reported: to
    1 report: City of Flint 1
    Show records

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

  • Caution: to
    1 report: City of Flint 1
    Show records

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

  • Discharge or advisory reported: to
    1 report: City of Flint 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 2026-11-05 01:25 UTC.

Reported discharges over time

  • Discharges affecting the Flint River in Michigan, last 12 months1717 affecting this stretch: 17 reported on the Flint River; 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 Flint River in Michigan, last 12 months29Reported on the Flint River in Michigan: 29 · Arriving from outfalls upstream, estimated: 0 (counted apart; together they need not equal the total)December 2025 to November 2026A day counts once however many discharges were under way on it.
  • Hours with a discharge or advisory status on the Flint River in Michigan, last 12 months646Reported on the Flint River in Michigan: 646 · 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 Flint River in Michigan3.8%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 Flint River in Michigan2Reported on the Flint River in Michigan: 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 Flint River within Michigan; the same river upstream is a separate record.

Combined sewer overflow (CSO): sewage mixed with rainwater spills from a shared sewer system. 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

63 reported discharges, January 2022 to November 2026.

  • Combined sewer overflow
  • Sanitary sewer overflow
  • Treatment bypass, blended or other

Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2022 to November 4, 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

9 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.

Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2001 to November 4, 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.

Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2022 to November 4, 2026.

Show table

Reported discharges per year, 2001 to 2026

229 reported discharges, 2001 to 2026.

  • Combined sewer overflow
  • Sanitary sewer overflow
  • Treatment bypass, blended or other

Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2001 to November 4, 2026.

Show table

Reported volume per year

Gallons (axis: K thousand, M million), summed from the 218 reports that gave a volume as a number (11 did not).

11 of 229 discharge reports gave no volume as a number; only numbers are summed.

Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2001 to November 4, 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

9 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.

Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2001 to November 4, 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

9 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.

Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2001 to November 4, 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.

Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2001 to November 4, 2026.

Show table

Reported discharges by wastewater outlet

Wastewater outlets with the most tracked discharge records: 10 of 92, all years. Counts depend on reporting coverage and do not measure legal compliance or harm.

Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2001 to November 4, 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.

  • U.S. Environmental Protection Agency sewer overflow records: records from May 3, 2022 to the latest update (limited records)
  • mi-egle-mienviro-cso-sso-list: records from January 1, 2001 to the latest update

Reports linked to Flint River

Reports linked to Flint River, newest first
WhenReportStatus
City of Flint · SSO · volume not reported report · notice · mapto Nov 22, 10:00 AM
to 10:20 AMCity of Flint · Northwest Pumping Station - Flint River · SSO · 1,000 gallons report · notice · mapended
to 11:50 PMCity of Flint · Third Avenue Pumping Station overflow outfall - Third Avenue Pumping Station overflow outfall; East bank of the Flint River · SSO · 500,000 gallons report · notice · mapended
to Apr 19, 7:22 AMCity of Flint · 003 Flint River · Bypass · 82.75 million gallons report · notice · mapended
to 10:00 PMCity of Flint · Third Avenue Pumping Station overflow outfall - Third Avenue Pumping Station overflow outfall; East bank of the Flint River · SSO · 14.4 million gallons report · notice · mapended
to Apr 5, 1:00 PMCity of Flushing · Sunnyside lift station, N. McKinley and Hutwest - Sunnyside is a lift station, N. McKinley is manhole 41 and Hutwest is manhole 57 · SSO · 13,600 gallons report · notice · mapended
to Apr 11, 7:01 AMCity of Flint · 003 Flint River · Bypass · 188.92 million gallons report · notice · mapended
to Apr 7, 4:30 AMCity of Flint · Third Avenue Pumping Station overflow outfall - Third Avenue Pumping Station overflow outfall; East bank of the Flint River · SSO · 68.3 million gallons report · notice · mapended
to 3:30 PMCity of Flint · Third Avenue Pumping Station overflow outfall - Third Avenue Pumping Station overflow outfall; East bank of the Flint River · SSO · 12.83 million gallons report · notice · mapended
to Mar 8, 5:10 PMCity of Flint · 003 Flint River · Bypass · 11.01 million gallons report · notice · mapended
to Mar 7, 4:30 PMCity of Flint · Third Avenue Pump Station (University Avenue) - Outfall along the East bank of the Flint River · SSO · 13.73 million gallons report · notice · mapended
to Mar 7, 12:00 AMCity of Flint · Storm Sewer Outfall #5 - The storm sewer outfall just East of the Linden Road bridge, along the South bank of the Flint River. · SSO · 250 gallons report · notice · mapended
to 1:00 PMCity of Flint · Flint River · SSO · 200 gallons report · notice · mapended
City of Flushing · Manhole 873 - Manhole 873 is overflowing onto the ground, the manhole is near a walking trail and parking lot. · SSO · “unknown gallons” report · notice · mapended
to Feb 24, 3:45 PMCity of Flushing · Manhole #873 - It is a manhole located near a walking trail next to the Flint River · SSO · 10,000 gallons report · notice · mapended
to 1:15 AMGenesee County Drain Commissioner · AR Treatment Plant - Plant grounds · Bypass · 353,124 gallons report · notice · mapended
to Dec 30 ’25, 1:08 AMCity of Flint · 003 Flint River · Bypass · 19.98 million gallons report · notice · mapended
to Jun 22 ’25, 11:34 PMCity of Flint · 003 Flint River · Bypass · 24.79 million gallons report · notice · mapended
to Apr 24 ’25, 10:23 PMCity of Flint · Northwest Pump Station overflow line - Flint River · SSO · 2 million gallons report · notice · mapended
to Apr 9 ’25, 8:45 PMCity of Flint · 003 Flint River · Bypass · 157.15 million gallons report · notice · mapended
to Mar 7 ’25, 7:30 AMCity of Flint · 003 Flint River · Bypass · 9.35 million gallons report · notice · mapended
to Jan 1 ’25, 10:19 PMCity of Flint · 003 Flint River · Bypass · 14.6 million gallons report · notice · mapended
City of Flint · Flint River - [house number removed] Buckham Alley · SSO · “unknown gallons” report · notice · mapended
to Aug 8 ’24, 11:08 AMCity of Flint · 003 Flint River · Bypass · 30.2 million gallons report · notice · mapended
to Jul 13 ’24, 4:06 AMCity of Flint · 003 Flint River · Bypass · 78.9 million gallons report · notice · mapended

Download these reports as CSV

Showing the latest 25 records of 229 records.See them all with filters.

All reports in Michigan by year: 2026 (15 here) · 2025 (6 here) · 2024 (13 here) · 2023 (16 here) · 2022 (13 here) · 2021 (9 here) · 2020 (5 here) · 2019 (1 here) · 2018 (13 here) · 2017 (9 here) · 2016 (4 here) · 2015 (2 here) · 2014 (5 here) · 2013 (20 here) · 2012 (7 here) · 2011 (29 here) · 2010 (6 here) · 2009 (14 here) · 2008 (14 here) · 2007 (4 here) · 2006 (3 here) · 2005 (3 here) · 2004 (5 here) · 2003 (2 here) · 2001 (11 here)

Wastewater outlets on this water

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

Sewer operators listed for this water: City of Flint, City of Flushing, FLINT MS4, Genesee County Drain Commissioner, Genesee County Drain Commission - Division of Water and Waste Services, City of Lapeer.

Boat launches

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

Nearby waters

Sources covering this water

229 records linked to this water. Updated .