High PM2.5 levels pose significant health risks, particularly in cities like Baraut and Khora, where concentrations exceeded NAAQS limits for most of October 2026. Prolonged exposure to such pollution can lead to respiratory and cardiovascular issues. Residents in Uttar Pradesh and Haryana, which host the majority of the most polluted cities, are at heightened risk. Conversely, cities like Aizawl and Rishikesh offer safer air quality, reducing health hazards for their populations. The disparity underscores the need for targeted interventions in pollution hotspots.