Milorganite fertilizer on your lawn may contain ‘forever chemicals’

People could be unknowingly spreading “forever chemicals” on their lawns and gardens in the form of fertilizers sold across the country, including Milwaukee’s famed Milorganite. 

A study by the Sierra Club and the Michigan-based Ecology Center found that Milorganite was one of several fertilizers that contain PFAS. All of the fertilizers are made of at least 50% biosolids — treated sewage sludge — rich in nutrients helpful in growing grass, fruits and vegetables. 

MMSD has been selling Milorganite as a commercial fertilizer since 1926 in the United States and Canada, and on its website touts the product as “one of the nation’s oldest recycling efforts.”