MENU Search for Search WASTE WATER MENU Decorah has provided municipal wastewater treatment service since 1916 when a septic tank and slow-sand filter were constructed for treatment of Decorah's Waste Waters. Details of that system are available from a set of plans still preserved by the City. Read more about the Decorah Waste Water History. Decorah Waste Water Treatment Plant Staff Michael O'Hara, Superintendent Andy Kruse, Maintenance Worker Pete Numedahl, Laboratory Tech Josh Ludeking, Maintenance Worker Contact Decorah Wastewater Treatment Plant 1766 Old Stage Road Decorah, IA 52101 Phone: (563) 382-3410 Fax: (563) 382-8397 What are Biosolids? Biosolids are an organic by-product generated from waste water treatment. They are rich in nutrients such as nitrogen and phosphorus and are used by farmers to enhance soil conditions. Plants need a compex mixture of nutrients, soil, air and water to grow. Read more about Biosolids. 2016 Headwaters Study City Of Decorah 2016 Headworks Study Contact Us City of Decorah PO Box 138, 400 Claiborne Dr. Decorah, Iowa 52101 (563) 382-3651 (563) 382-6525 Monday - Friday 7:30 a.m. - 4 p.m. Open Facebook Account Open Twitter Account Open Youtube Account Quick Links Jobs Alliant Energy Economic Development News Copyright © 2021 - City of Decorah, Iowa | All Rights Reserved. Powered by Iroc Web Design Services.