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Michigan / Sewer operators /

Marquette County

Sewer operator · Michigan · Gwinn

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)
MI0021423
Wastewater outlets
2 treatment plant outfalls listed by EPA or state agencies; no combined sewer outfall is listed · List
Waters listed as receiving wastewater
Silver Lead Creek
Tracked waters
Silver Lead Creek, MI
Discharge records counted
17 records · latest
Total reported volume in these records
401,600 gallons across the 14 records that give a volume (3 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 Marquette County or the state publishes its notices (check them for an alert sign-up):

Its public-notice channels

Source: Marquette County'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

Sanitary sewer overflow (SSO): sewage spills from a sewer meant to carry sewage separately from rainwater.

Reports linked to Marquette County, newest first
WhenReportStatus
to 4:30 PMWater not mapped · Manhole between Provider Street and Savage Street at K.I. Sawyer - Dischage flowed along and south of sewer access road. This is a wooded area with very limited access. · SSO · 8,000 gallons report · noticeended
to Dec 1 ’25, 1:00 PMWater not mapped · 520 ft west of Provider Street Cul De Sac at K.I. Sawyer - Discharge followed south of a sanitary sewer manhole, down the sewer access road. This is a wooded area with very limited access. · SSO · 80,000 gallons report · noticeended
to Jun 28 ’23, 5:30 PMWater not mapped · Manhole Southeast of Little Trout Lake - Manhole Southeast of Little Trout Lake, discharge followed north from a manhole down one side of the [house number removed] track access road. · SSO · “20,000 gallons” report · noticeended
to Mar 3 ’23, 3:00 PMWater not mapped · Manhole south of Little Trout Lake - Sewage leaking out of Sanitary Sewer Manhole, in wooded area, south of Little Trout Lake · SSO · “60,000 gallons” report · noticeended
to Mar 3 ’21, 12:00 PMWater not mapped · Sanitary Sewer Overflow Northeast of Little Trout Lake - Sanitary Sewer Overflow, first manhole northeast of Little Trout Lake · SSO · 40,000 gallons report · noticeended
to Nov 28 ’20, 1:30 PMWater not mapped · Wooded area between Caribou and Provider Streets at KI Sawyer · SSO · 70,000 gallons report · noticeended
Water not mapped · Northwest Corner of 5th Street and Avenue D, at Former KI Sawyer AFB, Gwinn Michigan - 30' by 60' Area NW of Intersection · SSO · 1,000 gallons report · noticeended
to 11:00 AMWater not mapped · S End of Provider St., 200 ft E - Manhole · SSO · volume not reported report · noticeended
to 1:45 PM“None affected” · manhole north east of little trout lake - manhole located on a walking trail · SSO · 100 gallons report · noticeended
to Nov 26 ’12, 11:00 AM“None affected” · manhole north east of little trout lake - manhole located on a walking trail · SSO · 1,000 gallons report · noticeended
to 3:00 PMWater not mapped · trail se of Little Trout Lake · SSO · 2,000 gallons report · noticeended
to Jun 18 ’12, 5:00 PMWater not mapped · Scorpion Ave, east of the ORV trail - forcemain breached, sewage to soil · SSO · 2,900 gallons report · noticeended
to Mar 23 ’11, 11:15 AMSilver Lead Creek · Vodoo Avenue east of Silver Lead Creek - manhole overflow · SSO · 178,600 gallons report · notice · mapended
to Jul 8 ’05, 11:00 AMWater not mapped · Private Residence Address · SSO · 6,000 gallons report · noticeended
to Jul 5 ’05, 2:30 PMWater not mapped · Private Residence Address · SSO · 8,000 gallons report · noticeended
to 3:30 AMWater not mapped · Private Residence Address · SSO · 3,000 gallons report · noticeended
to 3:00 PMWater not mapped · Private Residence Address · SSO · 1,000 gallons report · noticeended

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

All reports in Michigan by year: 2025 (2 from Marquette County) · 2023 (2 from Marquette County) · 2021 (1 from Marquette County) · 2020 (2 from Marquette County) · 2018 (1 from Marquette County) · 2016 (1 from Marquette County) · 2012 (3 from Marquette County) · 2011 (1 from Marquette County) · 2005 (3 from Marquette County) · 2003 (1 from Marquette County)

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 Marquette County, last 12 months1December 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once.
  • Days with a discharge reported by Marquette County, last 12 months2December 2025 to November 2026A day counts once however many discharges were under way on it.
  • Hours with a discharge or advisory status from Marquette County's reports, last 12 months30December 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 (Marquette County)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. Treatment bypass: wastewater skips one or more treatment steps. Blended discharge: wastewater that skipped some treatment is mixed with treated wastewater.

Reported discharges per month

4 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

1 discharge report has no end time and is not marked ongoing; under DirtyWaterWatch rules it shows caution, not a discharge or advisory status, and adds 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.

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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

17 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 14 reports that gave a volume as a number (3 did not).

3 of 17 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.

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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

1 discharge report has no end time and is not marked ongoing; under DirtyWaterWatch rules it shows caution, not a discharge or advisory status, and adds 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.

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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

1 discharge report has no end time and is not marked ongoing; under DirtyWaterWatch rules it shows caution, not a discharge or advisory status, and adds 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.

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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