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Ghaziabad was India’s most polluted city in winter 2025–26, with PM2.5 levels averaging 172 μg/m³.
Ghaziabad was India’s most polluted city during the 2025–26 winter, with an average PM2.5 level of 172 μg/m³, followed by Noida and Delhi, according to a CREA report.
The analysis of 238 cities found 204 exceeded India’s PM2.5 standard, up from 173 the previous winter, with Delhi recording 18 severe and 87 very poor air quality days.
All cities under the National Clean Air Programme and non-NCAP cities analyzed surpassed WHO guidelines, and 75 of 79 monitored cities in the Indo-Gangetic Plain breached national standards.
Haryana had the most cities where all sites exceeded the limit.
CREA called for nationwide PM2.5 targets and stronger controls on gaseous pollutants.
Ghaziabad fue la ciudad más contaminada de la India en el invierno de 2025-26 con niveles de PM2.5 de un promedio de 172 μg/m3.