Metals in Fertilizers

• Fertilizer Product Database
• Washington State Laws and Rules related to metals in fertilizers
• Metals analysis conducted by WSDA
• Washington State studies and publications related to fertilizer
• Related Links

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Washington State Laws and Rules related to metals in fertilizers

Current Laws and Rules:

• Washington Fertilizer Law (RCW 15.54)
• Washington Fertilizer Rules (WAC 16-200-695)
• Department of Ecology review process

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Metals Analysis Conducted by WSDA

• Summary of metals analyses of fertilizer products conducted by WSDA January 1, 2007 to current.
• Summary of metals analyses of fertilizer products conducted by WSDA from November 1999 through December 31, 2006.

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Washington State Studies and Publications related to fertilizers (July 1997 to present)

• Levels of Nonnutritive Substances in Fertilizers Report to the Legislature
  • December 2011
  • December 2009
  • December 2007
  • December 2005
  • December 2003
  • December 2001
  • December 1999
• A Report on the Plant Uptake of Metals from Fertilizer. December 2001. Updated August 2002.
• Imported Cadmium Contaminated Zinc Sulfate Used in Fertilizer and Other Products. July 2000. Publication #00-04-025.
• Screening Survey for Metals and Dioxins in Fertilizer Products and Soils in Washington State:
  • Supplemental Appendices: Final Report, Screening Survey for Metals and Dioxins in Fertilizer Products and Soils in Washington State. Jan. 1999.
  • Final Report Screening Survey for Metals and Dioxins in Fertilizer Products and Soils in Washington State. April 1999. Publication #99-309.
  • Addendum to Final Report: Screening Survey for Metals and Dioxins in Fertilizer Products and Soils in Washington State. Dioxins in Washington State Agricultural Soils. Nov. 1999.
• Controlling Metals and Dioxins in Fertilizers. January 1998. Publication #98-1251.
• 1997 Screening Survey of Metals in 55 Fertilizer Products.

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Related Links

• U.S. Environmental Protection Agency
  Zinc Fertilizers Made From Recycled Hazardous Secondary Materials (Final Rule), July 20, 2002
• Association of American Plant Food Control Officials (AAPFCO)
  The Heavy Metal Rule (SUIP #25)
• The Fertilizer Institute (TFI)
  Health Risk Evaluation of Select Metals in Inorganic Fertilizers Post Application, Jan. 16, 2000.  Risk assessment on which the AAPFCO proposed standards are based.
• California Dept. of Food and Agriculture
  Fertilizer Law

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Agency Contacts

• Washington State Dept. of Agriculture
  (360) 902-2025
• Washington State Dept. of Ecology
  (360) 407-6748
• Washington State Dept. of Health
  (360) 236-3174
• Washington State Dept. of Labor and Industries
  (360) 902-5478
• Washington State University
  (253) 445-4573

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