Greater Noida Hits Hazardous AQI of 308 as Delhi Remains Severely Polluted

Greater Noida topped India’s air‑quality rankings on October 13, 2026 with a hazardous AQI of 308, the highest reading among all monitored cities. Delhi followed with a severe AQI of 266, while nearby industrial hubs Faridabad (288), Noida (285), Ghaziabad (281) and Gurgaon (232) also posted severe levels. Varanasi’s reading stood at 223, still in the severe range. Mumbai showed a mixed picture, with stations reporting AQI values between 56 and 114, reflecting some relief from coastal winds but uneven air quality across the city. The AQI tracks pollutants such as PM2.5, PM10, nitrogen dioxide and sulphur dioxide. When these concentrations rise, they can irritate eyes, cause throat discomfort and trigger coughing or wheezing, especially in people with asthma. Children’s still‑developing lungs and older adults are more vulnerable to the same pollutants. Prolonged exposure to fine particles like PM2.5 can reduce lung function and raise the risk of chronic respiratory disease. The heart also feels the strain; long‑term pollution links to higher chances of heart attacks, strokes and other cardiovascular problems. Even short‑term spikes can lead to fatigue and make outdoor activities uncomfortable.

Context

Air‑quality alerts in October follow a seasonal rise in dust and vehicular emissions across northern Indian cities. The hazardous reading in Greater Noida signals that industrial and traffic sources are pushing pollutant levels beyond safe limits, a pattern seen in recent years during winter months.