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Michigan / Sewer operators /

Gogebic-Iron Wastewater Authority

Sewer operator · Michigan · Ironwood

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.

Federal wastewater discharge permit (NPDES)
MI0020125
Wastewater outlets
1 treatment plant outfall listed by EPA or state agencies; no combined sewer outfall is listed · List
Waters listed as receiving wastewater
Montreal River
Tracked waters
Montreal River, MI
Discharge records counted
65 records · latest
Total reported volume in these records
246,006,922 gallons across the 65 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 Gogebic-Iron Wastewater Authority or the state publishes its notices (check them for an alert sign-up):

Its public-notice channels

Source: Gogebic-Iron Wastewater Authority'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.

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

Treatment plant outfalls

1 outfall

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 Gogebic-Iron Wastewater Authority, newest first
WhenReportStatus
to 3:05 PMMontreal River · Oxidation ditch contents overflowed the tank and approximately 100 gallons spilled onto the ground. · Bypass · 100 gallons report · notice · mapended
to Apr 14, 3:25 AMMontreal River · 002 Outfall from Flow Equal Basin · Bypass · 3.25 million gallons report · notice · mapended
to Apr 18 ’25, 9:46 AMMontreal River · 002 Outfall from Flow Eq Basin (Old WWTP) · Bypass · 156,000 gallons report · notice · mapended
to May 22 ’24, 2:09 AMMontreal River · 002 002 · Bypass · 42,000 gallons report · notice · mapended
to May 6 ’23, 4:06 AMMontreal River · 002 F.E. Discharge · Bypass · 2.69 million gallons report · notice · mapended
to Apr 30 ’23, 1:28 AMMontreal River · 002 F.E. Discharge · Bypass · 295,000 gallons report · notice · mapended
to Apr 22 ’23, 9:34 AMMontreal River · 002 Flow Equalization Discharge · Bypass · 4.66 million gallons report · notice · mapended
to Apr 17 ’23, 2:38 AMMontreal River · 002 Flow Equalization Discharge · Bypass · 18.03 million gallons report · notice · mapended
to 8:24 PMMontreal River · 002 002 · Bypass · 218,000 gallons report · notice · mapended
to 9:51 AMMontreal River · 002 Flow Equalization Bypass · Bypass · 14,000 gallons report · notice · mapended
to 4:24 PMMontreal River · 002 Outfall 002 · Bypass · 16,000 gallons report · notice · mapended
to Apr 14 ’22, 12:00 PMMontreal River · 002 002 Outlet Structure · Bypass · 2.45 million gallons report · notice · mapended
to Apr 29 ’20, 6:20 AMMontreal River · 002 Effluent from flow equalization system · Bypass · 301,500 gallons report · notice · mapended
to Apr 8 ’20, 2:00 AMMontreal River · 002 Flow Equalization Discharge · Bypass · 294,000 gallons report · notice · mapended
to Apr 4 ’20, 3:15 AMMontreal River · 002 Discharge from flow equalization · Bypass · 536,000 gallons report · notice · mapended
to 5:00 PMMontreal River · 002 Discharge from flow equalization · Bypass · 822,000 gallons report · notice · mapended
to Apr 23 ’19, 1:00 PMMontreal River · WWTP Mh - N/a · SSO · 126,000 gallons report · notice · mapended
to Apr 23 ’19, 8:45 PMMontreal River · 002 Discharge from Flow Equalization · Bypass · 3.91 million gallons report · notice · mapended
to Apr 18 ’19, 9:00 AMMontreal River · 002 Flow Equalization · Bypass · 364,000 gallons report · notice · mapended
to Apr 9 ’19, 8:00 AMMontreal River · Equilization Basin - 002 · Bypass · 4.44 million gallons report · notice · mapended
to 4:00 PMMontreal River · manhole at wwtp gate - The location of the manhole is in the entrance driveway to the treatment plant · SSO · 180,000 gallons report · notice · mapended
to Oct 11 ’18, 1:00 PMMontreal River · MH adjacent to Gogebic WWTP · SSO · 7.93 million gallons in all mapended
to Aug 28 ’18, 5:00 AMMontreal River · MH adjacent to Gogebic WWTP · SSO · 1.05 million gallons in all 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 66 records.See them all with filters.

All reports in Michigan by year: 2026 (2 from Gogebic-Iron Wastewater Authority) · 2025 (1 from Gogebic-Iron Wastewater Authority) · 2024 (1 from Gogebic-Iron Wastewater Authority) · 2023 (4 from Gogebic-Iron Wastewater Authority) · 2022 (4 from Gogebic-Iron Wastewater Authority) · 2020 (4 from Gogebic-Iron Wastewater Authority) · 2019 (5 from Gogebic-Iron Wastewater Authority) · 2018 (7 from Gogebic-Iron Wastewater Authority) · 2017 (1 from Gogebic-Iron Wastewater Authority) · 2016 (5 from Gogebic-Iron Wastewater Authority) · 2015 (3 from Gogebic-Iron Wastewater Authority) · 2014 (9 from Gogebic-Iron Wastewater Authority) · 2013 (7 from Gogebic-Iron Wastewater Authority) · 2011 (1 from Gogebic-Iron Wastewater Authority) · 2010 (1 from Gogebic-Iron Wastewater Authority) · 2006 (2 from Gogebic-Iron Wastewater Authority) · 2005 (2 from Gogebic-Iron Wastewater Authority) · 2003 (2 from Gogebic-Iron Wastewater Authority) · 2002 (3 from Gogebic-Iron Wastewater Authority) · 2001 (2 from Gogebic-Iron Wastewater Authority)

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.
  • Caution: to
    1 report: Montreal River 1
    Show records

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

  • Discharge or advisory reported: to
    1 report: Montreal 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 Gogebic-Iron Wastewater Authority, last 12 months2December 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once.
  • Days with a discharge reported by Gogebic-Iron Wastewater Authority, last 12 months4December 2025 to November 2026A day counts once however many discharges were under way on it.
  • Hours with a discharge or advisory status from Gogebic-Iron Wastewater Authority's reports, last 12 months46December 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 (Gogebic-Iron Wastewater Authority)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

12 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.

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

65 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 65 reports that gave a volume as a number.

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

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

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: 8 of 8, 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