Compostable plastic labeling requirements

Washington's Plastic Product Degradability Law sets marketing claim standards for compostable products in the state. This law intends to reduce both misleading labeling practices and contamination at compost facilities. As of Jan 1, 2024, compostable products should be labeled according to the law, and producers must declare compostable products in our database. This applies to new compostable products and when existing ones are materially changed.

The labeling requirements apply to all compostable products sold, offered for sale, and distributed in Washington. There are specific rules for film bags, other film products, and food service products, which must be certified to ASTM standards D6400 or D6868.

Exempt products: Currently, products made from 100% wood, or another fiber, are exempt from the labeling rules. In addition, starting June 6, 2024, products that are at least 98% fiber-based are exempt as long as they do not contain any plastic additives, polymers, waxes, dyes, or other components.

Compostable product labeling requirements

Products labeled as “compostable” that are sold, offered for sale, or distributed in Washington State must:

  • Be quick and easy to identify as compostable for consumers and compost facilities.
  • Labeled appropriately based on the type of product.
  • Listed on a producer’s declaration of compliance.
  • Be made of wood or majority (98%) fiber-based with no plastic additives, OR
  • Be certified by a third-party that the product meets scientific standards for composting in industrial settings* (ASTM D6400, D6868, D8410, ISO17088, EN13432). Products must have the certifier’s logo.
    • Meeting these standards means products break down sufficiently during composting without impairing the compost's fertility or adding toxic substances.

* Food service products, film bags, and other film products must be certified to ASTM standards 6400 or D6868 (see chart below).

Important Dates

  • Jan 1, 2024 - Labeling law goes into effect.
  • Jun 6, 2024 - Changes from 2024 legislative session go into effect.
  • July 2024 - We begin enforcement
  • Meet scientific standard ASTM D6400 for composting in industrial settings.
  • Have a logo from third-party certifier.
  • Have a green, beige, or brown color signal and the written word “compostable” (three options)
    • Option 1: Colored or tinted completely and has the word “compostable” in 1-inch text on one side.
    • Option 2: Labeled with the word “compostable” on both sides in at least 1-inch text, written in green, beige, or brown.
    • Option 3: Labeled with a green, beige, or brown band on both sides at least 1-inch in height with the word “compostable” written within the band in a contrasting color at least 0.5-inch text.
    • Film bags smaller than 14-inches by 14-inches may have smaller text and color bands, if they are in proportion to the bag’s size.
  • No use of the chasing arrow or other recycling symbols.
  • Are listed on a producer’s declaration of compliance.
  • Meet scientific standard ASTM D6400 or D6868 for composting in industrial settings.
  • Have a logo from third-party certifier.
  • Food contact films:
    • Be completely or partially tinted green, beige, or brown. At minimum, must have a green, beige, or brown stripe at least 0.25-inch wide.
    • Labeled with the word “compostable,” where possible.
  • Non-food contact films:
    • Be completely or partially tinted green. At a minimum, must have a green stripe at least 0.25-inch wide.
    • Labeled with the word “compostable.”
  • Listed on a producer’s declaration of compliance.
  • Meet scientific standard ASTM D6400 or D6868 for composting in industrial settings.
  • Have a logo from third-party certifier.
  • Labeled with the word “compostable,” where possible.
  • Be completely or partially tinted green, beige, or brown. At minimum, must have a green, beige, or brown stripe at least 0.25-inch wide.
  • Listed on a producer’s declaration of compliance.
  • Meet scientific standard ASTM D6400, D6868, D8410, ISO17088, EN13432 or another similar standard for composting in industrial settings.
  • Have a logo from third-party certifier.
  • Labeled with the word “compostable,” where possible.
  • Uses green, beige, or brown labeling, color striping, symbols, tinting, marks, or other design patterns.
  • Listed on a producer’s declaration of compliance.

Non-compostable products and "greenwashing"

Greenwashing refers to misleading or deceptive practices about a product’s environmental impact, including marketing claims. Chapter 70A.455 RCW, Plastic Product Degradability, protects consumers from greenwashing and helps reduce contamination at compost facilities.

  • No product – including compostable ones – can be labeled as “biodegradable,” “degradable,” “decomposable,” or any other similar term. The only acceptable term in Washington State is “compostable.”
    • The only exception is “biodegradable” agricultural mulch films.
  • Products that are not certified to meet scientific standards for composting in industrial facilities cannot be labeled compostable.
  • Non-compostable film bags cannot use green, beige, or brown as color schemes, including botanical motifs like vines and leaves in these colors. Non-compostable film bags can only use green, brown, and beige for:
    • Stripes smaller than 0.25-inch wide and used as visual aids.
    • Lettering and logos used solely for brand identity purposes.

Many haulers and compost facilities do not accept compostable products. Be sure to check local lists of accepted materials before putting these materials in an organic collections bin.

Frequently asked questions


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