Quick Tips

  • Milorganite has consistently received Exceptional Quality designation from the EPA
  • Milorganite stays current with all regulatory changes
  • Phosphorus in Milorganite binds itself in the soil, available for plant uptake

Milorganite is the most heavily regulated fertilizer in the industry.  Our fertilizer must meet federal and state guidelines for safety and product quality.  We go above and beyond the requirements placed on us in order to exceed expectations and deliver the safest product that we can make.

Federal: Environmental Protection Agency (EPA)

Milorganite is a biosolids class fertilizer.  Biosolids are residual microbes that have digested nutrients out of sewage waste streams.  The EPA regulates biosolids using two tiers: tier one allows non-food use and tier two, the Exceptional Quality designation, allows use on vegetables and fruits and is given to biosolids with minuscule amounts of heavy metals and pathogens.  Milorganite has consistently received Exceptional Quality designation from the EPA since the guidelines were created in 1993. 

State: Association of American Plant Food Control Officials (AAPFCO)

The Association of American Plant Food Control Officials (AAPFCO) is the national organization of fertilizer control administrators from each state, Puerto Rico and Canada.  The group is responsible for administering fertilizer law and regulation.

AAPFCO ensures adequate labeling of fertilizer through the standardization of definitions for each fertilizer type. State control officials then test the nutrient content of fertilizers to make sure the mixture is consistent with these standards. This process protects consumers, guaranteeing that the label on the fertilizer they purchase is consistent with its nutrient content.

Each individual state has its own requirements regarding labeling and product quality.  Milorganite stays current with all pending regulatory changes through its membership in AAPFCO.

Milorganite’s Phosphorus is different

Research conducted by the University of Florida shows that Milorganite contains relatively low levels of water-extractable phosphorous (2% versus 85% found in synthetic sources). Water extractable phosphorus can be washed out of the soil, leaching into groundwater, and eventually causing excessive algae growth in our lakes and rivers. The inorganically bound phosphorus found in Milorganite binds itself in the soil, remaining available for plant uptake. The research also showed that the use of products like Milorganite work to reduce the amount of leaching of non-bound phosphorus from other sources as well.

The Governor of Wisconsin signed into law a ban on “phosphorus-containing-fertilizers” for typical lawn related use, effective 2010. This bill specifically excludes products like Milorganite. The phosphorus in Milorganite behaves differently than products that contain non-bound or water-extractable forms of phosphorus (such as Triple Super Phosphate) and is less likely to leach into lakes and streams.