State of Washington Fertilizer Product Database
WSDA's fertilizer product database provides information on the metals concentrations of each of the nine heavy metals (arsenic, cadmium, cobalt, mercury, molybdenum, lead, nickel, selenium, and zinc) for which Washington State has standards. If the link doesn’t work,. Go to www.wa.gov and search for the subject ‘fertilizer’ on their search window. All products in this database are currently registered for distribution in Washington State.