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Re-assessment pendingGSBiogas - ElectricityBrazilVintage 2023Registry: RegisteredACM0001

Manaus Landfill Gas Project

Developer: CONESTOGA-ROVERS ENGENHARIA LTDA

Methodology: ACM0001 (CDM)

GS-3903 ↗ · current registry ID: GS11728

Worked comparison example (English)

#457of 498 in Biogas#450of 477 in Brazil#2091of 2179 in Gold Standard (GS)#259of 279 in ACM0001

Score from methodology v2.1 (analysis of 5 Sep 2026). Re-assessment under v2.2 pending.

Assessment

CarbonMeld document-based assessment

01020304 Overall 3.8 / 10
Integrity 🔒 Transparency 🔒 Claim Safety 🔒 Documentation 🔒
Dimension scores are locked — the faint arcs are empty tracks, not zero scores.

Scale 0–10 · method weights: integrity 35% · transparency 25% · claim safety 25% · documentation 15%.

Re-assessment pending · v2.1

Scored2026-09-05medium confidence

evidence: 31/37 registry documents analyzed · 4 red flags

Generated by CarbonMeld Analysis Pipeline · Methodology · Editorial Policy · About the System
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How this analysis was made

Standard
Gold Standard (GS) How our current method reads projects of this standard
Methodology
ACM0001: Flaring or use of landfill gas How our current method reads projects of this type
Our method
CarbonMeld methodology v2.1 · analysed on 5 Sep 2026 · 31/37 registry documents analyzed · re-assessment under v2.2 pending

Analysis

The Manaus Landfill Gas Project is a VVB-verified Gold Standard biogas-to-electricity project with a confirmed investment-test additionality, but it is burdened by a 60% shortfall in verified emission reductions relative to ex-ante PDD estimates, a 0% leakage deduction with contradictory justifications across documents, an incomplete Phase 2, and over 40 material findings spanning data-quality errors, temporary deviations, and missing records. The project's documentation is extensive (31 documents) yet riddled with inconsistencies, and key transparency indicators (FNRB, usage monitoring, CORSIA status) are absent from the available documents.

Red Flags

4 red flags detected — Unlock with Premium

Findings

Risk Indicators

Additionality

🔒

Permanence

🔒

Leakage

🔒

Baseline

🔒

Safeguards

🔒

Double-claim

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Risk indicator details are a Premium feature

Score Breakdown

Score factors per dimension are a Premium feature — Unlock with Premium

Gates applied

The gates applied to this score are a Premium feature — Unlock with Premium

Detailed Analysis

The detailed per-dimension analysis is a Premium feature — Unlock with Premium

Evidence

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On this page: the analysis of 5 Sep 2026, marked “Re-assessment pending”. Per-dimension scores, risk indicators, 4 red flags, score factors, detailed analysis, and 37 registry documents (31 analyzed).

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Eligibility & market

What can you claim with this credit?

Four checks buyers ask about, from the registry and the Integrity Council (ICVCM).

  • Airlines (CORSIA)

    No CORSIA label on the registry

    Not usable for airlines' CORSIA obligations.

    Source: registry label · read on 2 Nov 2026

    Covers: this project's credit records as read on the registry

  • Integrity label (ICVCM CCP)

    CCP-labelled credits

    The registry marks credits of this project with the Integrity Council's Core Carbon Principles label: check that the units offered carry it.

    Source: registry label · read on 2 Nov 2026

    Covers: credits of this project that carry the label on the registry — not every unit or lot

  • Removal or reduction

    Emission reduction or avoidance

    Prevents or reduces emissions — fits contribution claims, not SBTi neutralisation.

    Source: registry label · read on 2 Nov 2026

    Covers: the project type, not a label on individual credits

  • Paris Agreement (Article 6)

    Not published

    This registry does not publish Article 6 authorizations.

Information only, from public sources. Claim rules (CORSIA, SBTi, EU rules on green claims) change: check them before making a public claim. Since 27 September 2026, EU consumer rules do not allow “climate neutral” product claims based on offsets.

Registry labels last checked:2026-11-02

Credit Vintages

IssuedRetiredAvailable
2021
285,984285,9840
2022
251,890251,8900
2023
344,736341,4273,309
2024
362,350161,447200,903
2025
333,0580333,058
Total1,578,0181,040,748537,270

Methodology versions used

The methodology version stated in each monitoring, verification and issuance document, by period, compared with the official methodology pages.

  1. 2021–2022ACM0001 v18.0since replaced by v19.0

    monitoring report + verification report

    official page · verified on

    in the ICVCM CCP-approved range (GS: 15.0-19.0) · official page · verified on

  2. 2022–2023ACM0001 v18.0since replaced by v19.0

    monitoring report + verification report

    official page · verified on

    in the ICVCM CCP-approved range (GS: 15.0-19.0) · official page · verified on

  3. 2023–2024ACM0001 v19.0current version

    monitoring report + verification report

    official page · verified on

    in the ICVCM CCP-approved range (GS: 15.0-19.0) · official page · verified on

  4. 2024–2025ACM0001 v19.0current version

    monitoring report + verification report

    official page · verified on

    in the ICVCM CCP-approved range (GS: 15.0-19.0) · official page · verified on

  • ACM0001: Active (CDM / UNFCCC) · official page · verified on

Being within an ICVCM-approved version range is information only: it does not mean these credits carry the CCP label, which the registry assigns to each issuance.

A version is shown only when the document's own text writes it next to the methodology code. Current versions, status and CCP ranges come from the official pages linked, checked on the date shown.

Documents on the registry

Retired by

Organisations named as beneficiaries in the registry's public retirement records.

Where to buy

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Marketplaces

Each listing shows what the shop published on the day it was checked. The registry balance on this page is not a seller's stock, and some shops show no price.

Cool Effect

Vintage 2023

checked on 1 Nov 2026

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Profile & governance

Methodology·Editorial Policy·About the System

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