Restrictions on Turf Fertilizers Containing Phosphorus

As of April 14, 2011, Governor Christine Gregoire signed “Clean Fertilizers, Healthier Lakes and Rivers” (ESHB 1489) into law. This law prohibits retail sales, displays, and the use of fertilizers containing phosphorus on turf. The law defines turf as residential, commercial, and publicly owned land. This definition includes home, condo, apartment complex lawns, and lawns closely mowed and maintained on commercial and public properties such as parks, golf courses, cemeteries, schools, and business centers. This law does not apply to pasture, grass grown for sod (turf farms), residential vegetable or flower gardens, or any other land used for agricultural production.

This law is an attempt to reduce the amount of phosphorus entering water bodies via surface runoff and storm drains. Testing has shown that water bodies in Washington state contain high levels of phosphorous. High levels of phosphorous in freshwater contribute to algae blooms and disrupt ecosystems.