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VMR0018 Methane Avoidance Through Separation of Solids from Wastewater or Manure Treatment Systems (AMS-III.Y. Revision), v1.0

On This Page
On This Page
Status

Active

Active Since

03 June 2026

Mitigation
Outcome Label
Eligibility

Reductions

Sectoral Scope

13. Waste handling and disposal

Development ID#

M0370

AMS-III.Y. applies to project activities that avoid or reduce methane emissions from anaerobic wastewater treatments and/or anaerobic manure management systems through the removal of volatile solids. The separated solids must be further treated, used, or disposed of in a manner that reduces methane emissions.

This revision incorporates the use of separated solids as bedding material and provides criteria for projects using biofiltrations systems, such as vermifiltration.

This methodology revision is used in conjunction with CDM methodology AMS-III.Y. Methane Avoidance through Separation of Solids from Wastewater or Manure Treatment Systems, v4.0.

Please note: 

CDM methodology AMS-III.Y. will be inactivated as a standalone methodology in the VCS Program on July 1, 2027. Projects that request registration on the Verra registry on or after July 1, 2027 must apply VMR0018, v1.0 in full. See “Implications for VCS Projects” below for more details.

VMR0018 Methane Avoidance Through Separation of Solids from Wastewater or Manure Treatment Systems (AMS-III.Y. Revision)Button Icon

Modules, Tools and Referenced Methodologies

VT0008 Additionality Assessment, v1.0Button Icon
VT0009 Combined Baseline and Additionality Assessment, v1.0Button Icon
VT0010 Emissions from Electricity Consumption and Generation, v1.1Button Icon
CDM TOOL03 Tool to calculate project or leakage CO2 emissions from fossil fuel combustionButton Icon
CDM TOOL13 Project and leakage emissions from compostingButton Icon
CDM methodology ACM0010 GHG emission reduction from manure management systems, v9.0Button Icon

Additional Resources

Quantification Spreadsheet for VMR0018, v1.0 (XLSX)Button Icon

  • AMS-III.Y. will be inactivated as a standalone methodology in the VCS Program on July 1, 2027.
  • Projects that request registration on or after July 1, 2027 must apply VMR0018, v1.0.
  • Project proponents seeking to register a project with the VCS Program comprising only activities included in the scope expansion of VMR0018 (i.e., use of separated solids as bedding material or biofiltration systems) must submit the initial registration request by the earlier of:
    • four years of the initial crediting period start date; or
    • June 3, 2028

All other projects must submit the initial registration request within two years of the initial crediting period start date.

  • Registered projects and project activity instances registered under AMS-III.Y. or VMR0003 must update to an active version of VMR0018 at their next crediting period renewal submitted on or after July 1, 2027.
  • For grouped projects registered using AMS-III.Y. or VMR0003, new project activity instances added to the project on or after July 1, 2027 as part of a verification approval request must meet all applicability conditions in VMR0018. Such grouped projects must fully adopt VMR0018 to include new instances.
  • Further requirements for projects that transition to VMR0018 are included in Section 5.4 of the methodology.
  • Registered projects using AMS-III.Y. may update to VMR0018 during their crediting period using one of the following:
    • Procedure to Change Project Methodology through a Project Description Deviation to align with VMR0018 for future monitoring periods, or
    • Methodology Change and Requantification Procedure to align with VMR0018 for past and future monitoring periods and requantify the reductions from past verifications
  • Project proponents seeking to register a project with the VCS Program that is registered or was previously registered with another greenhouse gas (GHG) crediting program must demonstrate conformance with the VCS Program rules and requirements and meet all applicability conditions of VMR0018.

Development History

VMR0018 Methane Avoidance Through Separation of Solids from Wastewater or Manure Treatment Systems (Revision to AMS-III.Y.), v1.0

Status: Active since June 3, 2026
Initial Registration Request Deadline:
Project proponents seeking to register a project with the VCS Program comprising only activities included in the scope expansion of VMR0018 (i.e., use of separated solids as bedding material and biofiltration systems) must submit the initial registration request by the earlier of:

  • four years of the initial crediting period start date; or
  • June 3, 2028

All other projects must submit the initial registration request within two years of the initial crediting period start date.
Mitigation Outcome Label Eligibility: Reductions
Summary of Changes: The following revisions to AMS-III.Y., v4.0 are included:
Requirements related to the use of separated solids as bedding material
Criteria for the use of biofiltrations systems, such as vermifiltration
Adoption of VCS tools: VT0008 Additionality Assessment, VT0009 Combined Baseline and Additionality Assessment and VT0010 Emissions from Electricity Consumption and Generation
Developer(s): Verra
Dates of Public Consultation: February 6, 2026 to March 9, 2026
Draft Shared During Public Consultation: VMR0018, v1.0 Draft Methodology
Summary of Public Consultation: Summary of Public Comments for VMR0018, v1.0 (PDF)
Independent Expert Reports: N/A
Announcement(s): Consultation: Revision to CDM Methodology for Methane Avoidance, Verra Publishes Revision to CDM Methodology for Methane Avoidance
Resource(s): Quantification Spreadsheet for VMR0018, v1.0 (XLSX)

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