稳定达标并改善，“杭州蓝”从阶段性成果迈向常态化

Core Viewpoint - Hangzhou has made significant progress in air quality improvement, achieving stable compliance with national air quality standards since 2020, with a notable reduction in PM2.5 levels and enhanced public perception of air quality [1][2]. Group 1: Air Quality Improvement - From January to November this year, the average PM2.5 concentration in Hangzhou was 27.9 micrograms per cubic meter, showing a year-on-year improvement of 2.1% [1]. - The city's air quality has transitioned from a temporary achievement to a normalized state, referred to as "Hangzhou Blue" [1]. Group 2: Pollution Sources and Mitigation Strategies - The main sources of local pollution are identified as traffic (31.9%), industrial emissions (21.2%), and dust (20.6%) [1]. - A comprehensive strategy has been implemented to address these sources, focusing on mobile sources, particularly the management of diesel trucks [1]. Group 3: Industrial Emission Reduction - Hangzhou has exceeded its annual emission reduction targets by completing 1,029 projects aimed at industrial pollution control, including the elimination of remaining coal and biomass boilers and the upgrade of waste incineration facilities [2]. - The city has fostered 123 environmentally advanced enterprises and completed 119 low-VOCs source replacement projects [2]. Group 4: Dust Control and Technological Integration - The city has implemented strict regulations for construction sites to control dust, utilizing IoT technology to create a monitoring network with over 1,600 dust monitoring devices [2]. - Local legislation has been enacted to enforce penalties for non-compliance with dust monitoring regulations, enhancing long-term regulatory effectiveness [2]. Group 5: Future Goals - Looking ahead, Hangzhou aims to continue reducing PM2.5 levels by focusing on engineering, structural, and management improvements, with an emphasis on green transportation and the elimination of outdated diesel vehicles [3]. - The city plans to enhance the efficiency of VOCs management and upgrade key industries to further reduce local air pollutants [3].