Grand Marais
Grand Marais, MN · Cook County · Publicly Owned Treatment Works
- Average flow
- 0.48 MGD
- Design flow
- 0.99 MGD
- NPDES permit
- MN0020010
- Effective
- Permit expires
- October 2029
- Population served
- 1,514
- CWNS 2022
Grand Marais is a publicly owned wastewater treatment plant in Grand Marais, Cook County, Minnesota treating an average of 0.48 million gallons per day against a permitted design capacity of 0.99 MGD, serving about 1,514 residents. Treatment on site includes carrousels / oxidation ditches, biogas silos. It discharges under NPDES permit MN0020010 (effective), which expires in October 2029, with 18 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 18
- Effluent violations
- 18
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Grand Marais.
No verified contacts on file yet
Klarifi verifies plant and municipal decision-makers continuously. Start a free trial to browse contacts at nearby plants and flag this one for verification.
Nearby wastewater treatment plants in Minnesota
Grand Portage · 34 mi away
—
Silver Bay · 54 mi away
—
Silver Bay · 57 mi away
—
Winton · 70 mi away
—
Ely · 72 mi away
0.56 MGD
Babbitt · 76 mi away
0.23 MGD
Two Harbors · 81 mi away
0.77 MGD
Hoyt Lakes · 87 mi away
0.31 MGD
Grand Marais: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026; facility record last updated January 25, 2025.