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Michigan / Sewer operators /

City of Sault Ste. Marie

Sewer utility with combined sewers · Michigan · Sault Ste Marie

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.

Solid dots mark combined sewer outfalls. Ringed dots mark treatment plant outfalls. Grey dots are closed outfalls. Square boat markers mark boat launches listed by OpenBoatLaunch.

Federal wastewater discharge permit (NPDES)
MI0024058
Wastewater outlets
5 combined sewer outfalls and 2 treatment plant outfalls listed by EPA or state agencies · List
Waters listed as receiving wastewater
Edison Power Canal; St. Mary's River
Tracked waters
St. Marys River, MI, Unnamed stream near Sault Ste. Marie, MI, Saint Marys River, MI
Discharge records counted
173 records · latest
Total reported volume in these records
3,955,185,048,865 gallons across the 107 records that give a volume (66 without one)

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 Sault Ste. Marie or the state publishes its notices (check them for an alert sign-up):

Its public-notice channels

Source: City of Sault Ste. Marie'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.

5 combined sewer outfalls and 2 treatment plant outfalls listed by EPA or state agencies.

Combined sewer outfalls

5 outfalls · 5 closed
  • Outfall 004 · receiving water in the permit: Edison Power Canal · no water record yet · closed
  • Outfall 005 · receiving water in the permit: St. Mary's River · St. Marys River, MI · closed
  • Outfall 007 · receiving water in the permit: St. Mary's River · St. Marys River, MI · closed
  • Outfall 008 · receiving water in the permit: Edison Power Canal · no water record yet · closed
  • Outfall 010 · receiving water in the permit: Edison Power Canal · no water record yet · closed

Source: U.S. Environmental Protection Agency (EPA) national combined sewer outfall inventory (ECHO) and state outfall layers. Open or closed as EPA's inventory lists it. DirtyWaterWatch links outlets to waters using permit numbers, locations and names.

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 City of Sault Ste. Marie, newest first
WhenReportStatus
Saint Marys River · Bypass · 217,000 gallons report · notice · mapto Nov 14, 9:44 PM
to 3:30 PMSaint Marys River · Upper St Mary's River - 011 Previous CSO Location · SSO · 4,500 gallons report · notice · mapended
to 1:30 PMWater not mapped · Storm sewer - Ditch · SSO · 1,000 gallons report · noticeended
to Apr 27, 6:00 AMSt. Marys River · 001 St Mary's River · Bypass · “1,592,000 gallons” report · notice · mapended
to Apr 19, 7:00 PMSaint Marys River · 010 Power Canal · SSO · 396,480 gallons report · notice · mapended
St. Marys River · 001 St Mary's River · Bypass · “63,359,000 gallons” report · notice · mapended
to Apr 5, 3:00 PMSt. Marys River · 001 St Marys River · Bypass · “11,084,000 gallons” report · notice · mapended
to Mar 10, 8:07 PMSt. Marys River · 001 St Marys River · Bypass · “7,260,000 gallons” report · notice · mapended
to 11:30 PMSt. Marys River · 001 St Marys River · Bypass · “332,000 gallons” report · notice · mapended
to Jan 10, 12:15 AMSt. Marys River · 001 St Mary's River · Bypass · “2,556,000 gallons” report · notice · mapended
to 5:49 AMSt. Marys River · 001 St Mary's River · Bypass · “262,000 gallons” report · notice · mapended
to 5:25 AMSt. Marys River · 001 St Marys River · Bypass · 950,000 gallons report · notice · mapended
to 6:05 PMSt. Marys River · 001 St Marys River · Bypass · “252,000 gallons” report · notice · mapended
to 9:40 AMSt. Marys River · 001 St Marys River · Bypass · “421,000 gallons” report · notice · mapended
to May 6 ’25, 8:30 AMSaint Marys River · 010 Power Canal · SSO · “26,550 gallons” report · notice · mapended
to May 2 ’25, 8:30 AMSaint Marys River · 010 Power Canal · SSO · “849,600 gallons” report · notice · mapended
to May 2 ’25, 8:21 AMSt. Marys River · 001 St Mary's River · Bypass · “1,625,000 gallons” report · notice · mapended
to 4:55 PMSt. Marys River · 001 St Mary's River · Bypass · “1,648,000 gallons” report · notice · mapended
to Apr 30 ’25, 8:20 AMSaint Marys River · 010 Power Canal · SSO · “2,668,800 gallons” report · notice · mapended
Saint Marys River · 010 Power Canal · SSO · “3,010,200 gallons” report · notice · mapended
to Apr 26 ’25, 6:40 AMSt. Marys River · 001 St Mary's River · Bypass · “4,604,000 gallons” report · notice · mapended
to Apr 23 ’25, 6:34 AMSaint Marys River · 010 Power Canal · SSO · “528,000 gallons” report · notice · mapended
to 12:15 PMSaint Marys River · 015 St Mary's River · SSO · “25,000 gallons” report · notice · mapended
to Apr 22 ’25, 12:22 PMSaint Marys River · 010 Power Canal · SSO · 2,880,000 million gallons report · notice · mapended
to Apr 23 ’25, 4:45 AMSt. Marys River · 001 St mary's river · Bypass · “5,211,000 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 173 records.See them all with filters.

All reports in Michigan by year: 2026 (10 from City of Sault Ste. Marie) · 2025 (25 from City of Sault Ste. Marie) · 2024 (9 from City of Sault Ste. Marie) · 2023 (8 from City of Sault Ste. Marie) · 2022 (12 from City of Sault Ste. Marie) · 2021 (8 from City of Sault Ste. Marie) · 2020 (9 from City of Sault Ste. Marie) · 2019 (8 from City of Sault Ste. Marie) · 2018 (1 from City of Sault Ste. Marie) · 2017 (9 from City of Sault Ste. Marie) · 2016 (3 from City of Sault Ste. Marie) · 2015 (3 from City of Sault Ste. Marie) · 2014 (15 from City of Sault Ste. Marie) · 2013 (19 from City of Sault Ste. Marie) · 2011 (2 from City of Sault Ste. Marie) · 2010 (10 from City of Sault Ste. Marie) · 2008 (9 from City of Sault Ste. Marie) · 2004 (3 from City of Sault Ste. Marie) · 2003 (1 from City of Sault Ste. Marie) · 2001 (9 from City of Sault Ste. Marie)

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: Saint Marys River 1
    Show records

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

  • Caution: to
    1 report: Saint Marys River 1
    Show records

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

  • Caution: to
    1 report: Saint Marys River 1
    Show records

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

  • Discharge or advisory reported: to
    1 report: Saint Marys River 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 reported by City of Sault Ste. Marie, last 12 months11December 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once.
  • Days with a discharge reported by City of Sault Ste. Marie, last 12 months20December 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 Sault Ste. Marie's reports, last 12 months251December 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 Sault Ste. Marie)0.1%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

64 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

23 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. 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

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

173 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 105 reports that gave a volume as a number (68 did not).

68 of 173 discharge reports gave no volume as a number; only numbers are summed. 2 reports give more than 5 billion gallons for a single discharge, which looks like an entry error; they are not 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

23 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. 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

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

23 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. 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.

Show table

Reported discharges by wastewater outlet

Wastewater outlets with the most tracked discharge records: 10 of 22, 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.

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