Weather Patna: Air Quality Update
Patna has been confirmed as the second-most polluted city in India, following Delhi, during the 2024-25 period. The city has recorded persistently high PM2.5 concentrations, driven by strong atmospheric stagnation and adverse meteorological conditions.
According to a recent study by Climate Trends, Delhi continues to face the most severe pollution crisis nationally, with the highest annual average PM2.5 levels and extended periods of ‘severe’ air quality. In contrast, Patna’s situation highlights an intensifying crisis in the eastern Indo-Gangetic Plain.
Over 70% of days in both Delhi and Patna fall under low-wind, high-humidity meteorological regimes, which significantly contribute to the poor air quality. Meteorological conditions can shift PM2.5 levels by up to 40%, even without any change in emissions, underscoring the impact of local weather on pollution levels.
Key factors such as low wind speed, high humidity, and atmospheric stagnation have been identified as crucial in intensifying PM2.5 levels during the winter months. This seasonal pattern poses a significant health risk to residents.
During the winter of 2024-25, Delhi implemented Stage III restrictions for about 53 days when air quality reached the ‘severe’ category, and Stage IV measures lasted for around 15 days during severe air quality episodes. These measures reflect the urgent need for action in both cities.
The Indo-Gangetic Plain, where both cities are located, is particularly vulnerable to high pollution levels due to its geography and seasonal weather patterns. This region has been consistently recording some of the highest PM2.5 pollution levels in India.
As the situation evolves, observers are closely monitoring the air quality trends in Patna and Delhi, with expectations for further studies to confirm the ongoing environmental challenges. Details remain unconfirmed regarding any immediate policy changes or interventions aimed at improving air quality.
