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Michigan / Sewer operators /

Lake Mitchell Sewer Authority

Sewer utility · 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.

No outlet locations are in our records for this operator. Square boat markers mark boat launches listed by OpenBoatLaunch.

Federal wastewater discharge permit (NPDES)
3112a-1031
Wastewater outlets
None in our records. EPA's and the state's outlet records list no outlet for permit 3112a-1031, and its overflow reports give no locations.
Waters listed as receiving wastewater
wetland; Wetland directly next to SPS 1B; Wetland directly behind the lift station; Lake Mitchell
Tracked waters
Lake Mitchell, MI
Discharge records counted
30 records · latest
Total reported volume in these records
13,425 gallons across the 29 records that give a volume (1 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 Lake Mitchell Sewer Authority or the state publishes its notices (check them for an alert sign-up):

Its public-notice channels

Source: Lake Mitchell Sewer 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.

EPA's and the state's outlet records list no outlet for permit 3112a-1031, and its overflow reports give no locations.

Reports and advisories

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

Reports linked to Lake Mitchell Sewer Authority, newest first
WhenReportStatus
Water not mapped · SSO · volume not reported report · noticeongoing
to Jul 20, 2:00 PM“wetland” · Air-release valve on West Lake Mitchell Dr. Near Quail Court - Adjacent ground and wetland · SSO · 1,000 gallons report · noticeended
Water not mapped · GP 21B - Adjacent ground/cement · SSO · 15 gallons report · noticeended
“Wetland directly next to SPS 1B” · SPS 1B - SPS 1B adjacent ground and wetland · SSO · 3,000 gallons report · noticeended
to 12:20 PMWater not mapped · Grinder Pump Station 102A - Adjacent ground near GP 102A · SSO · 100 gallons report · noticeended
to 2:35 PMWater not mapped · SPS 1A - SPS 1A surrounding ground · SSO · 250 gallons report · noticeended
to 3:00 PM“Wetland directly behind the lift station” · SPS 1B - Adjacent area to SPS 1B (ground & swamp) · SSO · 1,350 gallons report · noticeended
to 10:45 AMWater not mapped · Grinder Pump Station 20A - Soil next to the wet well on the discharge side · SSO · 200 gallons report · noticeended
to 10:30 AMWater not mapped · Upstream of GP 33C at the force main cleanout - Ground surrounding force main cleanout · SSO · 350 gallons report · noticeended
to 11:45 PMWater not mapped · Grinder Pump Station 44B - Discharge side on wet well · SSO · 20 gallons report · noticeended
Water not mapped · Grinder Pump Station 30A - Adjacent ground near wetwell · SSO · 5 gallons report · noticeended
to 2:20 PMLake Mitchell · Grinder Pump Station 44B Discharge line / 1 1/2" Force Main - Surrounding ground near GP and Lake Mitchell's water edge · SSO · 2,400 gallons report · notice · mapended
to 10:30 AMWater not mapped · Grinder Pump Station 55A Discharge line - Ground near GP 55A · SSO · 55 gallons report · noticeended
to Oct 29 ’24, 2:15 PM“Marsh wetlands near 107 Birch Dr” · Sanitary Sewer Manhole - Located near [house number removed] Birch Dr. - Sanitary Sewer Manhole located in a Marsh Area · SSO · 100 gallons report · noticeended
to Oct 4 ’24, 5:30 PMLake Mitchell · 2" Force Main located in a dirt road on Eagle Court - 2" Force main located in dirt road and side yard · SSO · 600 gallons report · notice · mapended
to 10:51 AMWater not mapped · LMSA Lift Station 1A - Surrounding ground around lift station · SSO · 250 gallons report · noticeended
to 7:38 AMWater not mapped · SPS 1B - SPS 1B Concrete Pad and surrounding area · SSO · 500 gallons report · noticeended
to 7:23 PMWater not mapped · SPS 1A - SPS 1A Concrete pad and surrounding ground · SSO · 165 gallons report · noticeended
to 7:00 PMWater not mapped · Grinder Pump 44B - Ground area surrounding the grinder pump station · SSO · 100 gallons report · noticeended
Water not mapped · Grinder Pump Station 38B - Cracked Sewer Discharge Line · SSO · 30 gallons report · noticeended
Water not mapped · 75A Grinder Pump Station - Cracked Discharge · SSO · 20 gallons report · noticeended
to 3:35 AMWater not mapped · Private Residence Address - SPS 1B - surrounding ground around the cement pad · SSO · 600 gallons report · noticeended
to 7:40 PMWater not mapped · West Lake Mitchell Drive - Discharge contained in the excavated hole · SSO · 50 gallons report · noticeended
to 10:15 AM“Adjacent swamp (the swamp is currently dry)” · SPS 1B - Surrounding ground and adjacent swamp · SSO · 600 gallons report · noticeended
to 12:00 PMWater not mapped · Grinder Pump Station 32A - Grinder Pump Station 32A - [house number removed] West Lake Mitchell Drive · SSO · 50 gallons report · noticeended

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 30 records.See them all with filters.

All reports in Michigan by year: 2026 (7 from Lake Mitchell Sewer Authority) · 2025 (6 from Lake Mitchell Sewer Authority) · 2024 (7 from Lake Mitchell Sewer Authority) · 2023 (2 from Lake Mitchell Sewer Authority) · 2022 (2 from Lake Mitchell Sewer Authority) · 2020 (3 from Lake Mitchell Sewer Authority) · 2019 (3 from Lake Mitchell Sewer 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.

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 Lake Mitchell Sewer Authority, last 12 months7December 2025 to November 2026Verified reports where available, else notices; revisions and duplicates counted once.
  • Days with a discharge reported by Lake Mitchell Sewer Authority, last 12 months8December 2025 to November 2026A day counts once however many discharges were under way on it.
  • Hours with a discharge or advisory status from Lake Mitchell Sewer Authority's reports, last 12 months214December 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 (Lake Mitchell Sewer Authority)3.9%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

24 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

6 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.

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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

30 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 29 reports that gave a volume as a number (1 did not).

1 of 30 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

6 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.

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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

6 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.

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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 29, 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