我是 LongbridgeAI，我可以總結文章信息。根據環境部長 Manjinder Singh Sirsa 的説法，德里的空氣質量在 2025 年相比於 2024 年顯著改善，1 月至 5 月期間，平均空氣質量指數（AQI）從 231 降至 214。平均 PM2.5 濃度也從每立方米 111 微克降至 95 微克。2025 年 5 月的空氣質量是十多年來該月份最清潔的，達到了 “中等” AQI。Sirsa 將這一改善歸因於政府的有效政策，儘管他指出，強降雨也有助於污染物的擴散
Delhi breathed easier between January to May as the AQI saw a significant improvement from last year, Environment Minister Manjinder Singh Sirsa said on Wednesday.
Sirsa said the data reveal that the average AQI during these five months stood at 214, an improvement from 231 recorded during the same period in 2024.
In addition, the average PM2.5 concentration for the period dropped to 95 micrograms per cubic metre, down from 111 micrograms per cubic metre in 2024, he added.
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PM2.5 are fine inhalable particles with a 2.5 micrometre or smaller diameter, and are the greatest health risk. The acceptable annual standard for PM2.5 is 40 micrograms per cubic metre.
Delhi's air quality in May was the cleanest for the month in over a decade, Sirsa said.
The average AQI for May was in the 'moderate' category an unusual achievement considering the historical trend of 'poor' air quality in previous years.
"Unlike previous governments that drafted policies but failed in execution, our government is delivering results on the ground. The steady decline in pollutant levels is proof that our comprehensive, multi-pronged approach is working," he said.
The minister's claims notwithstanding, Delhi recorded its wettest May since record-keeping began in 1901, with 186.4 mm of rain by the 25th of the month a significant factor in scattering pollutants and keeping the dust settled.