{"city":"Kolkata","slug":"kolkata","state":"West Bengal","country":"India","coordinates":{"lat":22.58157048,"lon":88.41002457},"scale":"CPCB National AQI (0-500)","unit":"AQI","source":"Central Pollution Control Board (CPCB)","license":"https://data.gov.in/","updated":"2026-10-22","current":{"aqi":237,"category":"Poor","dominant":"PM2.5","pollutants":{"PM2.5":101,"NH₃":15,"PM10":111,"NO₂":69,"SO₂":12,"O₃":49}},"history":[{"date":"2026-09-23","aqi":61,"category":"Satisfactory"},{"date":"2026-09-24","aqi":72,"category":"Satisfactory"},{"date":"2026-09-25","aqi":58,"category":"Satisfactory"},{"date":"2026-09-26","aqi":58,"category":"Satisfactory"},{"date":"2026-10-02","aqi":58,"category":"Satisfactory"},{"date":"2026-10-03","aqi":156,"category":"Moderate"},{"date":"2026-10-04","aqi":185,"category":"Moderate"},{"date":"2026-10-05","aqi":175,"category":"Moderate"},{"date":"2026-10-06","aqi":196,"category":"Moderate"},{"date":"2026-10-07","aqi":195,"category":"Moderate"},{"date":"2026-10-08","aqi":176,"category":"Moderate"},{"date":"2026-10-09","aqi":213,"category":"Poor"},{"date":"2026-10-10","aqi":272,"category":"Poor"},{"date":"2026-10-11","aqi":226,"category":"Poor"},{"date":"2026-10-12","aqi":244,"category":"Poor"},{"date":"2026-10-13","aqi":234,"category":"Poor"},{"date":"2026-10-14","aqi":223,"category":"Poor"},{"date":"2026-10-15","aqi":145,"category":"Moderate"},{"date":"2026-10-16","aqi":159,"category":"Moderate"},{"date":"2026-10-17","aqi":170,"category":"Moderate"},{"date":"2026-10-18","aqi":239,"category":"Poor"},{"date":"2026-10-19","aqi":264,"category":"Poor"},{"date":"2026-10-20","aqi":304,"category":"Very Poor"},{"date":"2026-10-21","aqi":303,"category":"Very Poor"},{"date":"2026-10-22","aqi":257,"category":"Poor"}]}