Fertilizer Registrants and Manufacturers
Minnesota law (Chapter 18C.401, Subd. 5) provides that the commissioner of agriculture may not license or register for sale or use in Minnesota any fertilizer containing more than 500 parts per million (ppm) by weight of arsenic."
The Fertilizer Law provision (18C.401) applies to all fertilizer products. Registrants and manufacturers are responsible to make sure that fertilizer products sold in Minnesota do not exceed 500 ppm. Any fertilizer product that exceeds this limit is subject to a Stop-Sale and removal from the state.
All registered and licensed fertilizers submitted for application must include an arsenic self-certification in order to be processed by the Minnesota Department of Agriculture (MDA).
Our agency may also require verification for certain products containing micronutrients, waste or ash. Arsenic concentrations are verified through a laboratory analysis report using 3050B or 3051A sample prep method as prescribed by the Environmental Protection Agency (EPA).
A laboratory verification of arsenic concentrations is required at the time of initial licensing and registration, or if the base raw materials or product sources change. If product composition does not change, an analysis report is not needed at the time of renewal.