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Michigan / Sewer operators /

Village of Dundee WWTP (Dundee WWTP)

Sewer utility with combined sewers · Michigan

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.

Ringed dots mark treatment plant outfalls. Square boat markers mark boat launches listed by OpenBoatLaunch.

Federal wastewater discharge permit (NPDES)
MI0020401
Wastewater outlets
2 treatment plant outfalls listed by EPA or state agencies; no combined sewer outfall is listed · List
Waters listed as receiving wastewater
not recorded
Tracked waters
River Raisin, MI
Discharge records counted
85 records · latest
Total reported volume in these records
151,105,871 gallons across the 85 records that give a volume

These totals reflect the records we track. Missing volumes and gaps in reporting limit comparisons between operators.

Sources: EPA ECHO and the operator and state sources linked below. Counts use the discharge records on this page. Updated 2026-11-05 01:25 UTC.

Public notices and alerts

Pages where Village of Dundee WWTP (Dundee WWTP) or the state publishes its notices (check them for an alert sign-up):

Its public-notice channels

Source: Village of Dundee WWTP (Dundee WWTP)'s public notice and alert pages and the state's notification records; DirtyWaterWatch register of public-notice channels and its page monitor.

Report a missing notice or error

Wastewater outlets

Outfall: a pipe or outlet where wastewater enters a water body.

2 treatment plant outfalls listed by EPA or state agencies; no combined sewer outfall is listed.

Treatment plant outfalls

2 outfalls

Source: U.S. Environmental Protection Agency (EPA) permit records (ICIS-NPDES permitted features): where a treatment plant’s permitted discharge leaves. No national source says whether a plant outfall is open or closed.

Reports and advisories

Treatment bypass: wastewater skips one or more treatment steps. Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater.

Reports linked to Village of Dundee WWTP (Dundee WWTP), newest first
WhenReportStatus
to Feb 28 ’23, 6:30 AMRiver Raisin · 001 2/27/23 Partially Treated; 0.75 MGD bypassed to outfall due to wet weather event. Precipitation records don't validate that claim. · Bypass · 750,000 gallons report · notice · mapended
to 8:05 PMRiver Raisin · 001 Permitted discharge point · Bypass · 25,000 gallons report · notice · mapended
to 11:45 PMRiver Raisin · 001 001 · Bypass · 1.08 million gallons report · notice · mapended
to Jan 27 ’20, 8:00 AMRiver Raisin · 001 Dundee WWTP outfall · Bypass · 1.08 million gallons report · notice · mapended
to Feb 3 ’20, 7:00 AMRiver Raisin · 001 Dundee WWTP Outfall · Bypass · 1.37 million gallons report · notice · mapended
to Jan 15 ’20, 7:00 AM“River Rasin” · 001A Dundee WWTP Outfall · Bypass · 192,000 gallons report · noticeended
to Jan 13 ’20, 7:00 AMRiver Raisin · 001A Dundee WWTP Outfall · Bypass · 282,000 gallons report · notice · mapended
to Jun 5 ’18, 8:00 AMRiver Raisin · WWTP, outfall 001 - WWTP outfall · Bypass · 60.23 million gallons report · notice · mapended
to May 31 ’17, 7:00 AMRiver Raisin · WWTP, outfall 001 - WWTP outfall · Bypass · 1.01 million gallons report · notice · mapended
to May 10 ’17, 7:35 AMRiver Raisin · WWTP, outfall 001 - WWTP outfall · Bypass · 1.83 million gallons report · notice · mapended
to Apr 12 ’17, 7:30 AMRiver Raisin · WWTP, outfall 001 - WWTP outfall · Bypass · 2.76 million gallons report · notice · mapended
to Apr 5 ’17, 7:30 AMRiver Raisin · WWTP, outfall 001 - WWTP outfall · Bypass · 1.99 million gallons report · notice · mapended
to 8:15 AMRiver Raisin · WWTP, outfall 001 - WWTP outfall · Bypass · 171,000 gallons report · notice · mapended
to Jul 6 ’15, 9:00 AMRiver Raisin · Private Residence Address - manhole 3.19 · SSO · 64,800 gallons report · notice · mapended
to Jul 6 ’15, 7:45 AMRiver Raisin · WWTP, outfall 001 - WWTP outfall · SSO · 7.37 million gallons report · notice · mapended
to Jun 24 ’15, 8:30 AMRiver Raisin · WWTP, outfall 001 - WWTP outfall · SSO · 437,040 gallons report · notice · mapended
to 7:00 AMRiver Raisin · Private Residence Address - manhole 3.19 · SSO · 50 gallons report · notice · mapended
to 5:00 AMRiver Raisin · Private Residence Address - manhole 3.19 · SSO · 50 gallons report · notice · mapended
to Mar 19 ’15, 3:00 PMRiver Raisin · WWTP, outfall 001 - WWTP outfall · SSO · 115,110 gallons report · notice · mapended
to Mar 18 ’15, 1:00 PMRiver Raisin · WWTP, outfall 001 - WWTP outfall · SSO · 580,605 gallons report · notice · mapended
to Apr 9 ’14, 9:30 AMRiver Raisin · WWTP, outfall 001 - WWTP outfall · SSO · 406,000 gallons report · notice · mapended
to Apr 4 ’14, 7:45 AMRiver Raisin · WWTP, outfall 001 - WWTP outfall · SSO · 429,000 gallons report · notice · mapended
to 8:00 AMRiver Raisin · Private Residence Address - manhole 3.19 · SSO · 50 gallons report · notice · mapended
to Mar 27 ’14, 9:30 AMRiver Raisin · WWTP, outfall 001 - WWTP outfall · SSO · 10.42 million gallons report · notice · mapended
to 7:30 AMRiver Raisin · WWTP, outfall 001 - WWTP outfall · SSO · 68,460 gallons report · notice · mapended

Sources: EGLE MiEnviro CSO/SSO List, retrieved 2026-11-04 15:09 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 85 records.See them all with filters.

All reports in Michigan by year: 2023 (2 from Village of Dundee WWTP (Dundee WWTP)) · 2021 (1 from Village of Dundee WWTP (Dundee WWTP)) · 2020 (4 from Village of Dundee WWTP (Dundee WWTP)) · 2018 (1 from Village of Dundee WWTP (Dundee WWTP)) · 2017 (5 from Village of Dundee WWTP (Dundee WWTP)) · 2015 (7 from Village of Dundee WWTP (Dundee WWTP)) · 2014 (4 from Village of Dundee WWTP (Dundee WWTP)) · 2013 (10 from Village of Dundee WWTP (Dundee WWTP)) · 2012 (2 from Village of Dundee WWTP (Dundee WWTP)) · 2011 (29 from Village of Dundee WWTP (Dundee WWTP)) · 2010 (9 from Village of Dundee WWTP (Dundee WWTP)) · 2009 (6 from Village of Dundee WWTP (Dundee WWTP)) · 2008 (5 from Village of Dundee WWTP (Dundee WWTP))

Other sewer operators on these waters

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.

No discharge, advisory or caution periods are shown for the waters this sewer operator's reports were placed on in this time span. Check downstream stretches and source coverage.

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 reported by Village of Dundee WWTP (Dundee WWTP), last 12 months0December 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once.
  • Days with a discharge reported by Village of Dundee WWTP (Dundee WWTP), last 12 months0December 2025 to November 2026A day counts once however many discharges were under way on it.
  • Hours with a discharge or advisory status from Village of Dundee WWTP (Dundee WWTP)'s reports, last 12 months0December 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 (Village of Dundee WWTP (Dundee WWTP))0.0%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.

Combined sewer overflow (CSO): sewage mixed with rainwater spills from a shared sewer system. Blended discharge: wastewater that skipped some treatment is mixed with treated wastewater.

Reported discharges per month

2 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.

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Hours with a discharge or advisory status per month

Hours when a water had a discharge or advisory status from this sewer operator's reports, 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. Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only.

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

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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.

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Reported discharges per year, 2001 to 2026

85 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.

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Reported volume per year

Gallons (axis: K thousand, M million), summed from the 85 reports that gave a volume as a number.

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

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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

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. Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only.

Source: mi-egle-mienviro-cso-sso-list. Records cover January 1, 2001 to November 4, 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. Official beach and cyanobacteria (harmful blue-green algae) advisories are counted on water pages only.

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

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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.

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Reported discharges by wastewater outlet

Wastewater outlets with the most tracked discharge records: 10 of 13, 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.

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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.

  • mi-egle-mienviro-cso-sso-list: records from January 1, 2001 to the latest update