This study establishes a baseline inventory of the number, types, and approximate distribution of DG sets in use in the Kathmandu Valley of Nepal and estimates air pollution emissions, including black carbon, from these generators. The study collates available national and city-level data on diesel consumption, electricity generation and demand, load shedding, and DG sets imports/sales to estimate emissions of BC and co-pollutants, namely - CO, SO2, NOx, TVOCs, and OC from DG sets use.