Household water purifier programme in Guinea

Audit Analysis

A Gold Standard household water purifier project in Guinea with VVB-verified additionality and no reversal events, but undermined by a 100-fold discrepancy in the fuel non-renewable baseline (fNRB) value between the verification and monitoring reports, seven corrective actions (including an fNRB calculation non-compliance with CDM TOOL30), and a project-specific baseline. The project delivered roughly 64% of its pro-rata ex-ante expectation for the first full monitoring year, and several cross-document contradictions (leakage, benefit sharing, fNRB method) reduce confidence in the data chain.

Project Description

Red Flags

• ⚠fNRB value differs by a factor of 100 between the verification report (48.305) and the monitoring report (0.48305), creating material uncertainty about the magnitude of claimed reductions
• ⚠fNRB method is stated as 'national default' in the verification report but 'local field' in the monitoring report, compounding the value discrepancy
• ⚠Seven corrective actions were required, including a material finding that the fNRB calculation did not comply with CDM TOOL30 requirements
• ⚠Leakage deduction is 5% in the verification report but 0% in the validation report, both dated 2025-02-28
• ⚠The project verified 55,000 tCO2e against a pro-rata ex-ante expectation of approximately 86,230 tCO2e for the one-year monitoring period (63.8% delivery)

Credit Vintages