Reflecting the desire for cleaner air, many developing countries have enacted clean air laws similar to those of developed nations, although to date most of these laws have been poorly enforced. A key starting point to better enforcement is obtaining comprehensive and reliable air-quality monitoring data. This report explores the impacts of air quality monitoring programmes implemented over the last decade in five developing countries: Morocco, the Philippines, Malaysia, Indonesia, and India. These case studies also examine the role of procurement of specialised equipment, usually imported, associated with the various air quality monitoring programmes.