Where to find credible research, data, and information on biosolids (treated sewage sludge)?

Biosolids (aka treated sewage sludge) are produced by most modern sewage treatment plants throughout the world.

In addition to the resources on OCSD's Biosolids Resources page, the following scientists and engineers have been recycling and researching biosolids for decades. Their websites contain some of the most relevent, comprehensive, credible, and user-friendly biosolids information.  

New England Biosolids and Residuals Association 



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The Science of Biosolids Recycling   

Water Environment Association of Ontario 

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Biosolids - Naturally Sustainable video 

Northwest Biosolids Management Association  


California Association of Sanitation Agencies  




Biosolids Fact Sheet 

National Biosolids Partnership    

Environmental Protection Agency 


Search website for "biosolids" - 

Loop Biosolids
King County, Washington



LoopLogo biosolids



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