Decorah Waste Water Treatment

Closed
1766 Old Stage Rd
Decorah, IA 52101

The Decorah Waste Water Treatment Plant has been providing municipal wastewater treatment services since 1916, evolving from an initial septic tank and slow sand filter system to a modern activated sludge treatment facility that became operational in November 1985. This facility treats wastewater from both the City of Decorah and the unincorporated community of Freeport, discharging treated water into the Upper Iowa River, which is classified for various wildlife and human contact uses.

Over the years, the plant has undergone significant upgrades, including a major renovation in 2004 that introduced ultraviolet disinfection and improved pumping station equipment. With a construction cost of approximately $4.5 million, the facility continues to meet the needs of a growing population while adhering to environmental standards set by the Iowa Department of Natural Resources.

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