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Michigan / Sewer operators /

City of Warren

Sewer operator · Michigan · Warren

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. Small hollow diamonds mark places named in its overflow reports (provisional). Square boat markers mark boat launches listed by OpenBoatLaunch.

Federal wastewater discharge permit (NPDES)
MI0024295
Wastewater outlets
2 treatment plant outfalls listed by EPA or state agencies; 1 place named in its own overflow reports (provisional locations) · List
Waters listed as receiving wastewater
Red Run Drain
Tracked waters
Red Run, MI, Clinton River, MI
Discharge records counted
51 records · latest
Total reported volume in these records
1,587,250,005 gallons across the 51 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 City of Warren or the state publishes its notices (check them for an alert sign-up):

Its public-notice channels

Source: City of Warren'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; 1 place named in its own overflow reports (provisional locations).

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.

Places named in overflow reports (provisional)

1 place

Provisional location from overflow reports. Where the operator's own reports put an overflow: a manhole, pump station or plant. Not an outfall listed in a permit.

  • Reported place · 1 overflow report, latest Nov 29, 2011 · confidence medium · no water record yet

Source: the operator's own overflow reports to the state. DirtyWaterWatch groups reports within 50 metres into one place and finds the water below it with U.S. Geological Survey river maps (NLDI, NHDPlus). Not a permitted outfall; provisional until an official outfall record exists.

Reports and advisories

Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater. Blended discharge: wastewater that skipped some treatment is mixed with treated wastewater. Treatment bypass: wastewater skips one or more treatment steps.

Reports linked to City of Warren, newest first
WhenReportStatus
to 3:30 PMRed Run · 001 plant outfall at red run · SSO · 2.48 million gallons report · notice · mapended
to Apr 5 ’25, 3:08 AMRed Run · [house number removed] warkop road warren mi 48093 - Warren WWTP 001 · SSO · 42.4 million gallons report · notice · mapended
to Aug 3 ’24, 4:15 AMRed Run · Retention basin overflow (NPDES Permit No. MI0024295 Outfall 001C - Warren WWTP discharge to Red Run Drain. · Blended · 17.42 million gallons in all mapended
to Jul 11 ’24, 9:36 AMRed Run · 001C Outfall 001C · Bypass · 8.99 million gallons report · notice · mapended
to 11:05 AM“Big Beaver Creek” · 004 Outfall 004, Warren WWTP, [house number removed] Warkop, Warren, MI 48093 · Bypass · 5 gallons report · noticeended
to Jan 29 ’24, 2:22 AMRed Run · 001C Outfall 001C · Bypass · 38.99 million gallons report · notice · mapended
to 9:08 AMRed Run · 9 Mile Pump Station · SSO · 874,000 gallons report · notice · mapended
to 10:30 AMRed Run · Stephens Rd detention basin - Stephens road detention basin · SSO · 323,000 gallons report · notice · mapended
to Apr 5 ’23, 1:01 AMRed Run · City of Warren Outfall - Red Run Drain · Blended · 21.03 million gallons report · notice · mapended
to Apr 2 ’23, 8:06 AMRed Run · Red Run Drain · Blended · 10.38 million gallons report · notice · mapended
to Oct 30 ’21, 4:00 AMRed Run · City of Warren Waste Water Treatment Plant outfall - City of Warren Waste water Treatment Plant outfall · Blended · 36.02 million gallons report · notice · mapended
to Oct 26 ’21, 8:00 PMRed Run · City of Warren WWTP - Red Run Drain · Blended · 11.89 million gallons report · notice · mapended
to Sep 24 ’21, 4:00 PMRed Run · Red Run - Red Run outfall · Blended · 103.6 million gallons report · notice · mapended
to 12:00 PM“schoenner drain” · 9 mile - [house number removed] mile rd · SSO · 120,000 gallons report · noticeended
to 10:00 PMWater not mapped · New Detention Basin · SSO · 2.3 million gallons report · noticeended
to Jan 13 ’20, 8:15 AMRed Run · 001 City of Warren Discharge to Red Run Drain · Blended · 37.46 million gallons report · notice · mapended
to 6:00 PM“Schoenherr Drain” · 9 mile pump station - 9 mile man hole located outside of station · SSO · 2.1 million gallons report · noticeended
to 10:15 PMRed Run · Nine Mile Road at Stewart - Sanitary sewer manhole at Nine Mile Road at Stewart · SSO · 1.1 million gallons report · notice · mapended
to May 3 ’19, 8:11 AMRed Run · 9 Mile PS - Storm sewer · SSO · 91.9 million gallons in all mapended
to 8:00 AMClinton River, Red Run · WWTP - Spitting box · Bypass · 100,000 gallons report · notice · mapended
to May 15 ’18, 5:20 PMClinton River, Red Run · 001C Blended effluent · Blended · 71.58 million gallons report · notice · mapended
to 2:30 PMClinton River, Red Run · 9 mile PS · SSO · 100,000 gallons report · notice · mapended
to Apr 17 ’18, 7:30 PMClinton River, Red Run · 001C Blended effluent · Blended · 54.3 million 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 51 records.See them all with filters.

All reports in Michigan by year: 2025 (2 from City of Warren) · 2024 (7 from City of Warren) · 2023 (2 from City of Warren) · 2021 (5 from City of Warren) · 2020 (2 from City of Warren) · 2019 (3 from City of Warren) · 2018 (5 from City of Warren) · 2017 (4 from City of Warren) · 2016 (5 from City of Warren) · 2014 (4 from City of Warren) · 2013 (2 from City of Warren) · 2011 (9 from City of Warren) · 2006 (1 from City of Warren)

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 City of Warren, last 12 months0December 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once.
  • Days with a discharge reported by City of Warren, 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 City of Warren'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 (City of Warren)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.

Reported discharges per month

11 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 a water had a discharge or advisory status from this sewer operator's reports, under DirtyWaterWatch rules.

  • Discharge or advisory reported

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

51 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 51 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

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

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.

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.

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Reported discharges by wastewater outlet

Wastewater outlets with the most tracked discharge records: 10 of 24, 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