2025年北京PM2.5年均浓度首次“破30” 蓝天成常态

Core Insights - Beijing's PM2.5 annual average concentration reached 27.0 micrograms per cubic meter in 2025, marking a significant milestone as it is the first time it has fallen below 30 micrograms, representing an 11.5% year-on-year decrease [2][4] - The air quality in Beijing achieved comprehensive compliance with national standards, with all six major pollutants meeting the required levels [2][4] Group 1: Air Quality Improvement - The annual average concentrations of other major pollutants also improved, with PM10 at 48 micrograms, NO2 at 22 micrograms, and O3 at 159 micrograms, showing year-on-year decreases of 11.1%, 8.3%, and 7.0% respectively [2] - Sulfur dioxide (SO2) and carbon monoxide (CO) concentrations remained extremely low at 4 micrograms per cubic meter and 0.9 milligrams per cubic meter [2] Group 2: Days of Good Air Quality - The number of days with good air quality reached 311 in 2025, an increase of 21 days compared to the previous year, resulting in a good air quality rate of 85.2%, the highest since monitoring began [4] - The number of heavy pollution days decreased to just 1 day in 2025, down from 58 days in 2013, reflecting a 98.3% reduction [8] Group 3: Long-term Trends - Since 2013, PM2.5 levels have shown a long-term improvement, decreasing from 89.5 micrograms per cubic meter to 27.0 micrograms per cubic meter, a reduction of 69.8% [6][8] - During the "14th Five-Year Plan" period, PM2.5 levels have consistently met national standards for five consecutive years, with a further 30% reduction from 2020 to 2025 [6]