This report, developed under the APEC project PPSTI 208 2023A, focuses on advancing air quality monitoring solutions to strengthen environmental governance in urban and industrial contexts across the APEC region. Led by the Industrial Technology Research Institute (ITRI), the project emphasizes the application of smart technologies—such as the Internet of Things (IoT), artificial intelligence (AI), unmanned aerial vehicles (UAVs), and cloud-edge computing—to enable real-time, cost-effective, and scalable monitoring systems. Through case studies in member economies, including Indonesia, Japan; Malaysia; the Philippines; and Chinese Taipei, the report showcases successful models of low-cost sensor deployment, automated enforcement mechanisms, and integrated data platforms. A cross-economy survey highlights common priorities and challenges, particularly the need for affordable solutions and regulatory alignment. The report concludes with policy recommendations advocating for integrated digital governance, enhanced regulatory frameworks, greater public data transparency, and regional collaboration to promote sustainable, inclusive, and data-driven air quality management throughout the APEC region.