GS7591 VPA 51 Safe Water Supply in Nigeria

Audit Analysis

This Gold Standard safe water supply project in Nigeria has a confirmed additionality test and quantified leakage deduction, but is undermined by a project-specific baseline, absence of a stated buffer pool, and an extensive list of material findings and corrective actions that raise concerns about calculation accuracy. The low extraction confidence and multiple cross-document contradictions (fNRB method, additionality verification, crediting period) further erode confidence in the reported figures.

Project Description

Red Flags

• ⚠Extensive list of 20+ material findings and 30+ corrective actions spanning calculation errors (incorrect baseline access value, wrong Qp,y defaults, fNRB justification gaps) suggest the ERR calculation may not be fully reliable
• ⚠Contradiction between verification report (fNRB method: local field) and validation report (fNRB method: national default) creates uncertainty about the 0.87 fNRB value
• ⚠Contradiction on additionality verification: verification report confirms VVB verification while the validation report indicates it was not verified
• ⚠Crediting period differs between the verification report (Oct 2023–Oct 2028) and the validation report (Feb 2025–Feb 2030), creating ambiguity about the applicable period

Credit Vintages