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Michigan / Waters /

Kalamazoo River

River in Michigan, past Albion, Allegan, Augusta, Battle Creek, Comstock, Galesburg, Hamilton, Kalamazoo, Macks Landing, Marshall, New Richmond and Otsego

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

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 Albion'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. No status does not mean the water is safe. Follow posted signs and local health advice.

Sources checked: a public source (last successful check 2026-11-05 01:05 UTC); a public source (last successful check 2026-11-05 01:05 UTC); EGLE MiEnviro CSO/SSO List (last successful check 2026-11-05 01:08 UTC). Status by DirtyWaterWatch, updated 2026-11-05 01:25 UTC. · Updated

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
    1 report: City of Albion 1
    Show records

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

  • Caution: to
    1 report: City of Albion 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 Kalamazoo River in Michigan, last 12 months22 affecting this stretch: 2 reported on the Kalamazoo 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 Kalamazoo River in Michigan, last 12 months8Reported on the Kalamazoo River in Michigan: 8 · 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 Kalamazoo River in Michigan, last 12 months135Reported on the Kalamazoo River in Michigan: 135 · 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 Kalamazoo River in Michigan3.0%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 Kalamazoo River in Michigan1Reported on the Kalamazoo River in Michigan: 1 · 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

6 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

5 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. 1 discharge reported to last more than 31 days is counted as 31 days.

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

90 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 82 reports that gave a volume as a number (8 did not).

8 of 90 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

5 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. 1 discharge reported to last more than 31 days is counted as 31 days.

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

5 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. 1 discharge reported to last more than 31 days is counted as 31 days.

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 62, 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 Kalamazoo River

Reports linked to Kalamazoo River, newest first
WhenReportStatus
City of Albion · SSO · 400,000 gallons report · notice · mapended
to May 29, 10:00 AMCity of Battle Creek · Storm sewer outfall located at [house number removed] Michigan Avenue W. - 60" storm water outfall · SSO · 54,000 gallons report · notice · mapended
to 9:45 PMCity of Battle Creek · interceptor at WWTP - Interceptor coming into WWTP · SSO · 313,500 gallons report · notice · mapended
to 6:10 PMCity of Kalamazoo · City of Kalamazoo Sanitary Sewer Manhole MHKC 14307 - Intersection of Wallace Avenue & East Michigan Avenue - Kalamazoo, Michigan · SSO · 100 gallons report · notice · mapended
to 11:54 PMCity of Kalamazoo · Kalamazoo WWTP Monitoring point 001A outfall - Kalamazoo WWTP Tertiary Effluent · Bypass · 1.5 million gallons report · notice · mapended
to 6:30 AMCity of Kalamazoo · [house number removed] North Pitcher Street Kalamazoo MI Graphic Packaging International - Internal sump overflowed to outside building structure · SSO · 2,000 gallons report · notice · mapended
to Nov 28 ’21, 12:00 PMCIty of Battle Creek WWTP · Biosolids Tank Area - Biosolids Tank · SSO · 20,000 gallons report · notice · mapended
to 3:50 PMCity of Battle Creek WWTP · 3 Low lying ground on Western side of WWTP · Bypass · 46,102 gallons report · notice · mapended
to 3:00 PMCity of Allegan · 2nd St. - Manhole near 2nd St. Bridge · SSO · 1,000 gallons report · notice · mapended
to 8:20 PMCity of Kalamazoo · STOWKC 23-1 - Sanitary Sewer Manhole · SSO · 2,370 gallons report · notice · mapended
to Sep 9 ’19, 8:00 PMCity of Kalamazoo · Collection System MH indicated in report - City of Kalamazoo Sanitary Sewer Manhole where SSO occurred · SSO · 94,500 gallons report · notice · mapended
to 4:00 PMCity of Plainwell · Private Residence Address - Storm water outlet (18inch) · SSO · 30 gallons report · notice · mapended
to 11:45 AMCity of Kalamazoo · Sewer Lateral from [house number removed] Riverview to manhole KC 14-211 · SSO · 30 gallons report · notice · mapended
to 4:30 PMCity of Kalamazoo · Private Residence Address - Resident pumping sewage out of basement that flowed on the public rightaway · SSO · 75 gallons report · notice · mapended
to 7:00 PMCity of Kalamazoo · [house number removed] Lake Street Kalamazoo, Michigan - Intersection of Lake Street & Clarence · SSO · 20,300 gallons report · notice · mapended
to 1:05 PMCity of Battle Creek · East Finals splitter box · SSO · “42,000 gallons” report · notice · mapended
to Dec 2 ’18, 1:30 AMKalamazoo · Private Residence Address - Parcom Street · SSO · 6,300 gallons report · notice · mapended
to 6:40 AMBattle Creek · Storm sewer at WWTP · SSO · 26,600 gallons report · notice · mapended
to 5:30 PMKalamazoo Lake S&WA · MH at corner of Lucey Street and Water Street - Saugatuck, MI · SSO · 1,500 gallons report · notice · mapended
to 6:30 PMKalamazoo Lake S&WA · Private Residence Address - [house number removed] Washington St, Douglas MI · SSO · 3,000 gallons report · notice · mapended
to 10:30 AMBattle Creek · Battle Creek WWTP - Wastewater Treatment Plant · SSO · 500 gallons report · notice · mapended
to 7:50 AMKalamazoo · Kwrp · Bypass · 572,222 gallons report · notice · mapended
to 9:00 AMBattle Creek · Battle Creek WWTP - Wastewater Treatment Plant · SSO · 5,000 gallons report · notice · mapended
to 4:15 AMGull Lake S&WA · [house number removed] N 37th Street · SSO · 40,000 gallons report · notice · mapended
to 9:00 PMAllegan · Second Street Bridge, South of - 2 Manholes South of Second St Bridge · SSO · 1,200 gallons report · notice · mapended

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.

Download these reports as CSV

Showing the latest 25 records of 90 records.See them all with filters.

All reports in Michigan by year: 2026 (2 here) · 2025 (1 here) · 2023 (2 here) · 2022 (1 here) · 2021 (1 here) · 2020 (2 here) · 2019 (6 here) · 2018 (3 here) · 2017 (1 here) · 2016 (3 here) · 2015 (2 here) · 2014 (3 here) · 2013 (2 here) · 2012 (2 here) · 2011 (6 here) · 2010 (1 here) · 2009 (3 here) · 2008 (15 here) · 2007 (7 here) · 2006 (8 here) · 2005 (5 here) · 2004 (6 here) · 2003 (2 here) · 2002 (2 here) · 2001 (4 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 Albion, City of Allegan, City of Battle Creek, City of Kalamazoo, City of Marshall, City of Plainwell, Kalamazoo Lake Sewer & Water Authority, OTSEGO WWTP.

Boat launches

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

Nearby waters

Sources covering this water

90 records linked to this water. Updated .