Minnesota Supreme Court Heard Duluth Stormwater Lawsuit
Justices heard arguments in a class-action case over disputed stormwater fees.
Updated on Oct. 14, 2026 in Utilities
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The Minnesota Supreme Court heard oral arguments on October 13, 2026, in a class-action lawsuit challenging Duluth's stormwater fee calculations. Plaintiffs contend the city overcharged businesses while offering improper discounts to others.
Why it matters
The outcome of this case could reshape how Duluth manages municipal utility funding and liability for past billing practices. The city faces significant financial exposure if the court sides with the plaintiffs, potentially impacting local utility budgets for years.
The lawsuit involves approximately 1,500 businesses seeking refunds dating back to 2015. The city estimates immediate claims reach $1 million, with potential total costs reaching 20 times that figure.
The players
Minnesota Supreme Court
This is the highest judicial body in Minnesota and is responsible for reviewing appeals on significant legal questions.
Moline Machinery LLC
This is a business entity acting as a plaintiff in the ongoing class-action lawsuit against the city of Duluth.
Glass Merchant Inc.
This is a business entity acting as a plaintiff in the ongoing class-action lawsuit against the city of Duluth.
Duluth
This is a major port city located on Lake Superior that is currently defending its utility fee structure in court.
The details
Plaintiffs, including Moline Machinery LLC and Glass Merchant Inc., argue the city's Equivalent Residential Unit (ERU) calculations unfairly burdened certain properties. Fees are typically determined by a site's impervious surface area and projected shed into the sewer system.
Timeline
Refund claims date back to 2015.
The class-action lawsuit was initiated in 2021.
Duluth adjusted its Equivalent Residential Unit (ERU) value in 2024.
The Minnesota Supreme Court heard oral arguments on October 13, 2026.
A written ruling is expected in the coming months.
Market Landscape
This litigation highlights the broader challenges municipalities face when updating utility rate structures and managing historical billing liabilities. The case follows the momentum of the Minnesota Court of Appeals reversal of the district court dismissal, signaling significant legal scrutiny for city utilities.
Local business owners may see long-term changes to how stormwater fees are calculated based on the court's final decision. Depending on the ruling, the city may be required to issue significant refunds or restructure its municipal utility billing practices.
The takeaway
Businesses concerned about municipal fees should track court rulings that affect local utility rate structures. Understanding the basis of ERU calculations can help companies better estimate their expected utility costs over time.
What happens next
The Minnesota Supreme Court is expected to issue a written ruling on the case in the coming months.
Further reading
Learn more about the infrastructure and policy issues in the region on our Utilities page.
Source note: This article includes information reported by Duluth News Tribune.
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