Standard Operating Procedure for Quality Assurance and Quality Control of Air Quality in Cambodia is an important milestone of the Air Quality Improvement Program (in Cambodia) which is funded by Agence Française de Développement (AFD). This Standard Operating Procedure (SOP) is an important regulatory tool that ensures the effectiveness of air quality data management. It also outlines the processes for collecting, analysing, and dissemination data from monitoring sensors and emphasizes the importance of strong data systems in formulating effective air quality control strategies. Importantly, this document provides a detailed overview of the source and effect of air pollution in Cambodia while assessing the current state of air quality data management. The document is in Khmer and English.