SilviGrow

WARNING! Sewage sludge is toxic. Food should not be grown in "biosolids." Join the Food Rights Network.

SilviGrow is a Seattle, WA, product sold as fertilizer but made from toxic sewage sludge. Hundreds of communities across the U.S. sell toxic sludge products that are typically renamed biosolids and sold or given away as "organic fertlizer" or "organic compost."

Sewage sludge is the growing and continuous mountain of hazardous waste produced daily by wastewater treatment plants. Thousands of hazardous organisms, materials and synthetic compounds removed from sewer water end up in this mountain of sludge. For up-to-date articles on the subject see the website Sludge News at http://www.sludgenews.org/about/ . The sewage sludge industry has created a PR euphemism it uses in place of the words 'sewage sludge': biosolids.

According to one website:

"King County operates several wastewater treatment plants in and around the Seattle, Washington area. Some of the biosolids from these plants are anaerobically-digested and dewatered to produce a biosolids "cake". The cake is either composted with sawdust to produce a product called GroCo or delivered directly to forest application sites as SilviGrow. King County has a long history of developing the SilviGrow program in association with the University of Washington College of Forest Resources. SilviGrow application to forest land is safe and beneficial. Trees fertilized with SilviGrow grow twice as fast as unfertilized trees. Thousands of forest land acres have been fertilized with SilviGrow.

"Recently, King County has entered into a partnership with Washington DNR, University of Washington, Sierra Club, Weyerhaeuser, and others in what's called the "Mountains to Sound Re-Greening Program." This program involves hundreds of volunteers in the restoration and revegetation of logging roads no longer needed along the scenic Interstate 90 corridor from Puget Sound to the east side of the Cascades. GroCo is being used to restore revegetate the unsightly, barren scars left by many old logging roads."

Articles and resources

Related SourceWatch articles

• Biosolids
• Sewage sludge
• Food Rights Network
• Sewage sludge giveaways, producers, and brands
• The EPA's plan to bypass opposition to sewage sludge disposal
• Water Environment Federation
• You say biosolids, I say sewage sludge

External resources

• Marie Kulick, Smart Guide on Sludge Use and Food Production, Institute for Agriculture and Trade Policy, 2008.
• Targeted National Sewage Sludge Survey: EPA-822-R-08-016 and EPA-822-R-08-018, EPA, January 2009.
• Environmental Working Group, Dumping Sewage Sludge On Organic Farms? Why USDA Should Just Say No, April, 1998.
• Environmental Working Group, Routes of Exposure sewage sludge: EWG Research on Chemicals in sewage sludge, April 30, 1998.

External articles

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