This page provides links to external and Department of Resources Recycling and Recovery (CalRecycle) organics resources. Identification of individuals, companies, or organizations on this list does not constitute endorsement by CalRecycle. This list should not be considered comprehensive.



  • Association of Compost Producers is a trade association of organizations dedicated to increasing the quality, value and amount of compost produced and used in California.
  • California Resource Recovery Association (CRRA) is a nonprofit dedicated to promoting waste reduction, reuse, recycling, pollution prevention, and composting. CRRA works to expand markets for recycled materials, promote sustainable materials policies, and provide a clearinghouse for information, innovation, industry and government initiatives.
  • Northern California Recycling Association is a nonprofit organization that promotes waste reduction, reuse, salvaging, recycling, and composting as vital tools for resources and energy conservation and as cost-effective, environmentally sound methods of disposing of discarded materials.
  • U.S. Composting Council is a national, nonprofit trade and professional organization promoting recycling of organic materials through composting.

Compost Microbiology

Educational Sites

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