About Us
2035 Vision
Strategic Plan & Performance
History
Milorganite
GIS Maps and Data
Rain Gauge Data
News
Events
Facilities
Budget/Financial
Blue Notes Newsletter
Blue Notes Newsletter Sign-up
What We Do
Education and Outreach
Milwaukee Estuary AOC Projects
Sustainability
What You Can Do
Green infrastructure
Rain Barrels
Rain Garden
Porous Pavement
Native Landscaping
Adopt-A-River
Become a Fresh Coast Guardian
Home HazMat Collection
Medicine Collections
Water Drop Alert
What Not to Flush
Procurement
Procurement Opportunities
Construction and CAD Standard Documents and Special Bid Attachments
Vendor Registration
Events & Outreach
Supplier Diversity
Business Development
Workforce Development
Contract Compliance Login
Government & Business
Municipal Information
Rules & Regulations
Private Property I & I
Pipe Check Contractor Resources
Industrial Waste & Pretreatment
Industrial Honor Roll
Total Maximum Daily Loads (TMDL)
2050 Facilities Plan
2020 Water Quality Initiative
Milorganite® fertilizer is manufactured by the Milwaukee Metropolitan Sewerage District (MMSD). MMSD captures wastewater from the metropolitan Milwaukee area, and using large-scale processes that mimic nature, microbes digest the nutrients found in the water. The cleaned water is returned to Lake Michigan while the microbes are kiln-dried into small pellets. Milorganite® is actually a bag of dried microbes (not poop)!
The production of Milorganite® is one of the nation’s oldest recycling efforts. For more than 95 years, we've safely recycled these nutrient-rich microbes into a slow-release fertilizer that works wonders for lawns, gardens, flowers trees, and shrubs. Milorganite® stands for "Milwaukee Organic Nitrogen".
Wastewater enters the Jones Island water reclamation facility where all solid materials such as sand, boards, shop rags, plastic, and debris are first removed. Microbes are added to the water—the activation process—and oxygen is bubbled through the water to create the ideal environment for the microbes to digest the nutrients in the water.
The microbes die after they consume all of the nutrients. Binding agents are added to the water causing the microbes to clump together and settle to the bottom of the undisturbed water in sedimentation tanks. After everything has settled the cleaned water is returned to Lake Michigan and the microbe clumps are sent on for dewatering and drying.
Moisture is first squeezed out of the clumps using belt presses resulting in something similar to wet cardboard. The semi-solid material moves on to one of 12 rotary kiln driers heated to 900–1200 ⁰F which heats the Milorganite to an internal temperature of 176°F. The extreme heat kills pathogens.
Milorganite is analyzed for at least 20 parameters every day to comply with all applicable safety guidelines for protecting human health and the environment. After passing all tests, it’s ready to be packaged and shipped throughout the United States.
"Bugs" turned into Milorganite® fertilizer
The first rail car of Milorganite®, heading out of Milwaukee, WI.
Customers across the United States share their Milorganite® stories with us of their beautiful lawns and gardens. You can see our customer testimonials on the Milorganite® social media channels and website.
Are you a fan of Milorganite®? Please share your Milorganite® story with an image or video. To show our appreciation for your support of Milorganite® we will send you a Milorganite® sticker and you can select from a t-shirt, hat, or rain gauge. Thank you, for being a loyal customer and sharing your Milorgnaite® story with us!
To purchase a retro Milorganite® t-shirt visit our partner Brew City. Thank you, for your support of Milorganite®!
By using our website you are consenting to our use of cookies in accordance with our cookie policy.
