媒体纵览 | 环境空气质量新国标来了！“好天气”标准更严（新华社）

Core Viewpoint - The newly revised "Ambient Air Quality Standards" (GB 3095—2026) introduces stricter limits on air pollutants, particularly PM2.5, to better protect public health [2][3]. Group 1: Revised Standards - The annual average concentration limit for PM2.5 has been adjusted to 10 micrograms per cubic meter for the first level and 25 micrograms per cubic meter for the second level [3]. - The daily average concentration limit for PM2.5 is set at 25 micrograms per cubic meter for the first level and 50 micrograms per cubic meter for the second level [3]. - The revised standards also tighten limits for PM10, sulfur dioxide (SO2), and nitrogen dioxide (NO2) [3]. Group 2: Implementation Phases - The new standards will be implemented in phases, with the first phase starting on March 1, 2026, and lasting until December 31, 2030, during which transitional concentration limits will apply: PM2.5 annual and daily average second-level limits will be 30 micrograms per cubic meter and 60 micrograms per cubic meter, respectively [3]. - The second phase will commence on January 1, 2031, when the revised concentration limits for PM2.5, PM10, SO2, and NO2 will be enforced nationwide [3].