Labeling a product "home compostable" — Requirements.
RCW 70A.455.130
in effectA producer may only label a product as being "home compostable" if: (1) The product has been tested and meets ASTM standards D6400 or D6868 for industrial composting settings; (2) A third-party certifier has verified that the product meets ASTM standards for industrial composting; (3) The product is otherwise labeled in a manner consistent with the requirements of this chapter, including RCW 70A.455.030 , 70A.455.040 , or 70A.455.050 , as appropriate; (4) The product is not labeled "home compostable only" or in a manner that otherwise implies that the product is not capable of being composted in industrial compost settings; and (5) The producer has valid and reproducible scientific evidence to support their claim that a product is home compostable, consistent with federal trade commission guidelines.
A producer may only label a product as being "home compostable" if:
(1) The product has been tested and meets ASTM standards D6400 or D6868 for industrial composting settings;
(2) A third-party certifier has verified that the product meets ASTM standards for industrial composting;
(3) The product is otherwise labeled in a manner consistent with the requirements of this chapter, including RCW 70A.455.030 , 70A.455.040 , or 70A.455.050 , as appropriate;
(4) The product is not labeled "home compostable only" or in a manner that otherwise implies that the product is not capable of being composted in industrial compost settings; and
(5) The producer has valid and reproducible scientific evidence to support their claim that a product is home compostable, consistent with federal trade commission guidelines.
Source: WA Statutes (Official Site)URL: https://app.leg.wa.gov/RCW/default.aspx?cite=70A.455&full=trueFetched: 6/29/2026