Sewage in the Mississippi? Not Quite. Why Dubuque Is Paying a $7,000 Fine, Seeking Compensation Amidst Upgrades

Clean water has been a hot-button issue for as long as I can remember, and for good reason. It's strange thinking that whatever you flush at home or dump in your yard ends up back in your shower and sink for use. When you live in a city on the river, it's even more important to have a properly working water processing facility. In Dubuque, we've had a few rough years, and now the city is facing a $7,000 fine for permit violations tied to treated effluent that had higher pollutant levels than allowed for in the permit, which was released into the Mississippi River. Not raw sewage, mind you (what comes into the plant), but rather undertreated water was returned.

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According to KCRG-TV9, the City of Dubuque’s Water and Resource Recovery Center (WRRC) reported 72 violations between 2020 and 2024. The WRRC is the city’s wastewater treatment plant, responsible for cleaning water before it returns to the river. To operate, the facility must meet strict state and federal permit conditions, with more than 2,000 to fulfill per year.

So, what went wrong? City officials point to a few major disruptions in their release:

• In 2022, the facility saw biological instability in its treatment process. This issue has since been fixed with better monitoring and process controls.
• In fall 2023, a contractor error knocked out the plant’s boiler for weeks, causing 33 violations. The city says it’s seeking damages from the contractor.
• In December 2024, an explosion linked to third-party equipment damaged systems and led to even more violations.

Together, those last two problems caused 40 of the total 72 violations.

Despite the setbacks, performance at the facility has improved in 2025. In the first seven months of this year, only seven violations have been reported, and all were still tied to the lingering effects of that 2024 explosion. City officials say new staff positions, stronger oversight, and long-term planning have helped improve operations.

The Iowa Department of Natural Resources has proposed an Administrative Consent Order to settle the matter. On August 18, 2025, the Dubuque City Council approved that order, which includes the $7,000 penalty.

At the same time, Dubuque is committing to long-term upgrades. Projects include a $7.3 million improvement to handle high-strength waste, a $3 million replacement of electrical controls, and more than $134 million in sewer and treatment system investments planned through 2030. These projects aim to prevent future failures and keep the system reliable for decades to come.

For residents, the takeaway is fairly straightforward: Dubuque acknowledges the violations, is prepared to pay the fine, and is investing heavily in upgrades to ensure the city’s wastewater system is more resilient for the future.