Biosolids are the highly treated, safe, nutrient-rich, organic material derived from the wastewater treatment process. Biosolids have many benefits when recycled.
CASA’s biosolids program was launched in 2003 to provide proactive biosolids management leadership in the State of California. The mission of the biosolids program is to:
- Promote environmentally sound recycling of biosolids.
- Foster cooperation among governmental agencies, regulators, private corporations, the agricultural community, and the general public in the management of biosolids.
- Develop and maintain a system of sharing up-to-date, accurate, science-based biosolids information with CASA member agencies, local, state and federal regulatory agencies, and the general public.
- Identify and support appropriate university research to add to the scientific base for regulations and to stay up to date on research to respond to questions and concerns about biosolids.
- Advocate against county biosolids recycling land application bans, and help members minimize biosolids management costs while advocating environmentally sound biosolids practices that benefit the people of California.
- Chapter 40 Code of Federal Regulations part 503 »
- Supporting documents for federal biosolids regulations: EPA website »
- November 2015 EPA Update on 14 Projects RE 2002 NAS Report »
- CASA – DC Meeting Summary with EPA 022316
- Biosolids General Order 2004-0012-DWQ »
- Statewide Programmatic Environmental Impact Report »
- Cal Recycle compost and in-vessel digestion regulations »
- CASA SOP and Exclusion Training »
- CASA FOG-FW Receiving Station SOP Template »
- CASA SOP and Exclusion Training Decio CalRecycle »
- CASA SOP and Exclusion Training Dow CMSA »
- CASA SOP and Exclusion Training Gonzales SWRCB »
- CASA SOP and Exclusion Training McDannel LACSD »
- SB 1383 Implementation – Organics Diversion White Paper
Fire-ravaged Land Reclamation
- Restoring fire-ravaged land with biosolids »
- Biosolids application affecting runoff water quality following forest fire »
- Plant and soil responses to biosolids application following forest fire »
- Biosolids after Buffalo Creek fire, Colorado »
- Compost as post-fire erosion control and effect on run-off water quality »
- TCR Fire Ravaged Biosolids Scope
- January 12, 2017 WE&RF Webinar Presentation
Superfund and other Mine Sites
- Reclamation of Palmerton Zinc Superfund Site »
- Ecosystem function in alluvial tailings after biosolids and lime addition »
- In situ soil treatments to reduce the phyto and bio availability of lead, zinc and cadmium »
- Using municipal biosolids in combination with other residuals to restore metal-contaminated mining areas »
- Field test of in situ soil amendments at the Tar Creek National Priorities List superfund site »
- EPA Guidance – The use of soil amendments for remediation, revitalization, and reuse »
- Biosolids use in constructed wetlands for landfill leachate treatment »
- Biosolids use in restoring degraded foreshore habitat »
- Biosolids use in wetland creation »
- Wetland Restoration Bunker Hill, Idaho »