Master Composter / Sustainability Steward Volunteer Program

Photo of volunteers
Master Composter Sustainability Steward volunteers build a compost bin in community garden.

The Master Composter/Sustainability Steward (MC/SS) volunteer program is a key partner in Seattle’s waste reduction and recycling efforts. Seattle residents learn how to:

  • Build worm bins
  • Recycle food and yard waste at their homes
  • Help their community reduce, reuse, and recycle
  • Build healthy urban soils
  • Support thriving landscapes throughout the city

Learn how to become a Master Composter/Sustainability Steward from the Tilth Alliance.

Master Composter/Sustainability Steward training is part of the Sustainable Yard and Home program, a partnership between Seattle Public Utilities and Tilth Alliance.

Public Utilities

Andrew Lee, General Manager and CEO
Address: 700 5th Avenue, Suite 4900, Seattle, WA, 98104
Mailing Address: PO Box 34018, Seattle, WA, 98124-5177
Phone: (206) 684-3000

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Seattle Public Utilities (SPU) is comprised of three major direct-service providing utilities: the Water Utility, the Drainage and Wastewater Utility, and the Solid Waste Utility.