January 13, 2026
The Countywide Integrated Waste Management Plan Update for 2025
Read moreAugust 18, 2025
ZWS staff annually submit a report to CalRecycle with data and information about tons sent to landfill as well as tons recycled, composted, reused, or otherwise diverted from landfill on behalf of all 10 member jurisdictions.
Read moreMay 19, 2025
At the Oct 19, 2023 regular meeting, the ZWS board awarded a 1.5 year contract to Cascadia Consulting Group, Inc. to provide technical assistance to businesses complying with SB 1383 and Disposable Food Ware Ordinance requirements.
The primary objectives of the project were:
March 21, 2025
This annual report details education/outreach efforts by staff and contractors, including English and Spanish Eco-Desk 565-DESK (3375), social media and website activity, covering ZWS's fiscal year July 1, 2023 - June 30, 2024.
Read moreDecember 12, 2024
ZWS staff annually submit a report to CalRecycle with data and information about tons sent to landfill as well as tons recycled, composted, reused, or otherwise diverted from landfill on behalf of all 10 member jurisdictions.
Read moreDecember 5, 2023
This annual report details education/outreach efforts by staff and contractors, including English and Spanish Eco-Desk 565-DESK (3375), social media and website activity, covering ZWS's fiscal year July 1, 2022 - June 30, 2023.
Read moreJune 13, 2023
The Countywide Integrated Waste Management Plan Update for 2020
Read moreNovember 18, 2022
This annual report details education/outreach efforts by staff and contractors, including English and Spanish Eco-Desk 565-DESK (3375), social media and website activity, covering ZWS's fiscal year July 1, 2021 - June 30, 2022.
Read moreAugust 11, 2022
In 2021, ZWS staff released a Request for Qualifications (RFQ) to find a contractor to conduct a Countywide Food Recovery Capacity Study. The contract was awarded to Abound Food Care. They were tasked with interviewing Commercial Tier 1 and Tier 2 Food Generators (defined under SB 1383) and Food Recovery Organizations and Services in all 10 jurisdictions of Sonoma County to understand real and perceived barriers to food donation and recovery. As part of the project, Abound also conducted a needs assessment.
Read moreMarch 16, 2022
Update to the Non-disposal Facility Element (NDFE) section of the COIWMP.
Read moreNovember 20, 2020
This annual report details education/outreach efforts by staff and contractors, including English and Spanish Eco-Desk 565-DESK (3375), social media and website activity, covering ZWS's fiscal year July 1, 2019 - June 30, 2020.
Read moreNovember 15, 2019
This annual report details education/outreach efforts by staff and contractors, including English and Spanish Eco-Desk 565-DESK (3375), social media and website activity, covering ZWS's fiscal year July 1, 2018 - June 30, 2019.
Read moreSeptember 23, 2018
Municipal Recovery Certification Facility Application(0kb)
Municipal Recovery Certification C&D Facility Processing Line Report(0kb)
August 10, 2018
This section contains links to proposals received by the SCWMA for the above mentioned RFP. Proposals were received by the following companies:
Cold Creek Compost/Stage Gulch Organics(0kb)
Hitachi Zosen Inova(0kb)
Napa Recycling and Waste Services(0kb)
Recology(0kb)
Renewable Sonoma(0kb)
Sacyr Environmental Management(0kb)
Storm Fisher Biogas(0kb)
Waste Management(0kb)
June 6, 2018
If you wish to comment on these proposals, please send comments to Patrick Carter by August 14, 2018. If you need assistance with document accessibility, please contact the Agency Clerk at (707) 565-3579.
June 20, 2018 Staff Report(0kb)
June 20, 2018 Presentation(0kb)
Summary of Proposals(0kb)
Proposal Ranking(0kb)
Financial Analysis(0kb)
July 18, 2017
Read moreJune 16, 2017
Read moreJune 14, 2017
This investigation was initiated by a citizen complaint to the 2015-16 Civil Grand Jury. The 2016-17 Civil Grand Jury decided to research the complaint about the lack of a local composting site, the significant cost to haul green waste out of the county (out-haul) and the important consequences for the citizens of Sonoma County.
Read moreDecember 5, 2015
Prepared by CH2M HILL
Read moreDecember 13, 2014
Prepared by R3 Consulting Group, Inc.
Read moreSeptember 9, 2014
Prepared by SCS Engineers
Read moreFebruary 21, 2014
Prepared by Agency staff
Read moreFebruary 6, 2014
Prepared by Agency staff
Read moreApril 19, 2013
Prepared by Environmental Science Associates
The Sonoma County Waste Management Agency has prepared a Final Environmental Impact Report (EIR) examining the impacts of a relocated compost facility in Sonoma County. The Final EIR addresses comments made during the Draft and Recirculated Draft EIR comment periods.
April 3, 2013
Prepared by Rincon Consultants
The Sonoma County Waste Management Agency previously prepared a Draft Environmental Impact Report examining the impacts of a Proposed Ordinance on the subject of carryout bags.". The intent of the Proposed Ordinance is to reduce the environmental impacts related to the use of single-use carryout bags. It is anticipated that by prohibiting single-use plastic carryout bags and requiring a mandatory charge for each paper bag distributed by retailers, the Proposed Ordinance would provide a disincentive to customers to request paper bags when shopping at regulated stores and promote a shift to the use of reusable bags by retail customers, while reducing the number of single-use plastic and paper bags within the Study Area. The Final Environmental Impact Report addresses comments made during the Draft Environmental Impact Report comment periods.
February 7, 2013
Prepared by Rincon Consultants
The Sonoma County Waste Management Agency has prepared a Draft Environmental Impact Report examining the impacts of a Proposed Ordinance on the subject of carryout bags. The intent of the Proposed Ordinance is to reduce the environmental impacts related to the use of single-use carryout bags. It is anticipated that by prohibiting single-use plastic carryout bags and requiring a mandatory charge for each paper bag distributed by retailers, the Proposed Ordinance would provide a disincentive to customers to request paper bags when shopping at regulated stores and promote a shift to the use of reusable bags by retail customers, while reducing the number of single-use plastic and paper bags within the Study Area.
December 4, 2012
Prepared by Environmental Science Associates
The Sonoma County Waste Management Agency (SCWMA) has prepared a Recirculated Draft Environmental Impact Report (RDEIR) for the SCWMA Compost Facility. This RDEIR addresses an increase in the amount of material processed at the Central Site Alternative from 110,000 tons per year (analyzed in the “2011 Draft EIR) to 200,000 tons per year (analyzed in this Recirculated Draft EIR). To assure that all the resource areas are appropriately analyzed, all the resource areas for the Central Site Alternative are reviewed in this RDEIR for impacts related to the increased capacity and operational changes. As to the increased throughput, recirculation of the entire 2011 Draft EIR is not required because other sites (Sites 5A and 40) were already analyzed for 200,000 tons per year.
December 2, 2011
Prepared by Environmental Science Associates
This is a draft Environmental Impact Report (DEIR) for the SCWMA Compost Facility. The DEIR identifies impacts and environmental issues related to the SCWMA Compost Facility (proposed project), and also discusses and analyzes alternatives to the proposed project, as required by CEQA.
August 11, 2011
Prepared by the Sonoma County Waste Management Agency
Read moreDecember 12, 2010
Prepared by R3 Consulting Group, Inc.
Read moreDecember 11, 2010
Prepared by the Sonoma County Waste Management Agency
This is a revision of the Household Hazardous Waste Element (HHWE) and Siting Element (SE) of the Sonoma Countywide Integrated Waste Management Plan (CoIWMP). Revisions and an addendum have been submitted to the California Department of Resources Recycling and Recovery (CalRecycle).
December 19, 2009
Prepared by the Sonoma County Waste Management Agency
This is the Final Supplemental Program Environmental Impact Report (SPEIR) for the 2009 Amendments to the Sonoma Countywide Integrated Waste Management Plan (CoIWMP). The Final SPEIR responds to comments from the Draft SPEIR.
December 12, 2009
Prepared by the Sonoma County Waste Management Agency
This is the Draft Supplemental Program Environmental Impact Report (SPEIR) for the Amendment to the Sonoma Countywide Integrated Waste Management Plan (CoIWMP). The Draft SPEIR identifies impacts and environmental issues related to the Amendment to the CoIWMP.
May 6, 2009
Prepared by SCS Engineers
Read moreDecember 12, 2008
Prepared by Environmental Science Associates
Read moreJanuary 12, 2008
A presentation by Tim Smith made to the California Product Stewardship Council.
Text from the presentation(0kb)
Sonoma County Universal Waste Tracking 2005 - 2007 (Household Hazardous Waste & Conditionally Exempt Small Quantity Generators) (0kb)
November 6, 2007
Prepared by Cascadia Consulting Group
Read moreApril 6, 2007
Prepared by the Sonoma County Waste Management Agency
Read moreJanuary 10, 2007
Prepared by Sweetser & Associates
Read moreJanuary 5, 2007
Prepared by R3 Consulting Group, Inc.
Read moreDecember 5, 2006
Prepared by Brown, Vence and Associates (BVA)
For the Updated Final Model Report, see reports produced in 2009.
Read moreDecember 2, 2004
Prepared by Brown, Vence and Associates (BVA)
Screening and Evaluation Criteria(0kb)
Identify Alternatives (0kb)
Alternatives Analysis(0kb)
Integrated Systems Scenarios (0kb)
Presentation from public meeting December 9, 2004 (0kb)
November 1, 2003
Prepared by R3 Consulting Group
Read moreOctober 2, 2003
Prepared by the Sonoma County Waste Management Agency
Table of Contents(0kb)
Chapter 1: Executive Summary(0kb)
Chapter 2: Goals, Objectives and Policies(0kb)
Chapter 3: County Profile and Plan Administration(0kb)
Chapter 4: Section 4.1 and 4.2 Introduction(0kb)
Chapter 4: Section 4.4 Recycling(0kb)
Chapter 4: Section 4.5 Composting Component (PDF: 1.71 MB)(0kb)
Chapter 4: Section 4.6 Special Wastes(0kb)
Chapter 4: Section 4.7 Education Component(0kb)
Chapter 4: Section 4.8 Facility Capacity(0kb)
Chapter 4: Section 4.9 Funding(0kb)
Chapter 4: Section 4.10 Integration(0kb)
Chapter 5: Household Hazardous Waste Element(0kb)
Chapter 6: Siting Element(0kb)
Chapter 7: Non-disposal Facility Element(0kb)
Appendix A(0kb)
Appendix B(0kb)
Appendix C(0kb)
Appendix D(0kb)
Appendix E(0kb)
Appendix F(0kb)
October 1, 2003
Prepared by the Sonoma County Waste Management Agency.
Read moreMarch 1, 2003
Prepared by Conservatree
Read moreSeptember 1, 2002
Prepared by McKenzie-Mohr Associates
Read more