{"city":"Châteauguay","country":"Canada","lat":45.38338088989258,"lon":-73.74919128417969,"range":"48h","license":"CC BY 4.0","source":"https://cerns.io","hourly":[{"datetime_utc":"2026-05-28T09:00:00Z","aqi":9,"aqi_min":9,"aqi_max":9,"pm25":2.1036691665649414,"pm10":1.870171308517456,"stations":2},{"datetime_utc":"2026-05-28T10:00:00Z","aqi":35,"aqi_min":35,"aqi_max":35,"pm25":8.356404304504395,"pm10":8.10407543182373,"stations":2},{"datetime_utc":"2026-05-28T11:00:00Z","aqi":8,"aqi_min":8,"aqi_max":8,"pm25":2.0,"pm10":2.0,"stations":1},{"datetime_utc":"2026-05-28T12:00:00Z","aqi":53,"aqi_min":53,"aqi_max":53,"pm25":13.0,"pm10":13.0,"stations":1},{"datetime_utc":"2026-05-28T13:00:00Z","aqi":8,"aqi_min":8,"aqi_max":8,"pm25":2.0,"pm10":2.0,"stations":1},{"datetime_utc":"2026-05-28T16:00:00Z","aqi":2,"aqi_min":2,"aqi_max":2,"pm25":0.5199999809265137,"pm10":null,"stations":1},{"datetime_utc":"2026-05-28T17:00:00Z","aqi":7,"aqi_min":7,"aqi_max":7,"pm25":1.649999976158142,"pm10":null,"stations":1},{"datetime_utc":"2026-05-28T18:00:00Z","aqi":0,"aqi_min":0,"aqi_max":0,"pm25":0.05000000074505806,"pm10":null,"stations":1},{"datetime_utc":"2026-05-28T19:00:00Z","aqi":6,"aqi_min":6,"aqi_max":6,"pm25":1.4500000476837158,"pm10":null,"stations":1},{"datetime_utc":"2026-05-28T20:00:00Z","aqi":4,"aqi_min":4,"aqi_max":4,"pm25":1.0,"pm10":null,"stations":1},{"datetime_utc":"2026-05-28T21:00:00Z","aqi":10,"aqi_min":10,"aqi_max":10,"pm25":2.3399999141693115,"pm10":null,"stations":1},{"datetime_utc":"2026-05-29T00:00:00Z","aqi":3,"aqi_min":3,"aqi_max":3,"pm25":0.6949462890625,"pm10":0.6233904361724854,"stations":2},{"datetime_utc":"2026-05-29T01:00:00Z","aqi":4,"aqi_min":4,"aqi_max":4,"pm25":0.8999999761581421,"pm10":null,"stations":1},{"datetime_utc":"2026-05-29T02:00:00Z","aqi":4,"aqi_min":4,"aqi_max":4,"pm25":0.8999999761581421,"pm10":null,"stations":1},{"datetime_utc":"2026-05-29T03:00:00Z","aqi":3,"aqi_min":3,"aqi_max":3,"pm25":0.6572853326797485,"pm10":0.6233904361724854,"stations":2},{"datetime_utc":"2026-05-29T04:00:00Z","aqi":7,"aqi_min":7,"aqi_max":7,"pm25":1.6233904361724854,"pm10":1.2467808723449707,"stations":2},{"datetime_utc":"2026-05-29T05:00:00Z","aqi":4,"aqi_min":4,"aqi_max":4,"pm25":1.0376609563827515,"pm10":0.6233904361724854,"stations":2},{"datetime_utc":"2026-05-29T06:00:00Z","aqi":6,"aqi_min":6,"aqi_max":6,"pm25":1.3766095638275146,"pm10":1.870171308517456,"stations":2},{"datetime_utc":"2026-05-29T07:00:00Z","aqi":9,"aqi_min":9,"aqi_max":9,"pm25":2.2071352005004883,"pm10":1.2467808723449707,"stations":2},{"datetime_utc":"2026-05-29T08:00:00Z","aqi":9,"aqi_min":9,"aqi_max":9,"pm25":2.252328395843506,"pm10":1.2467808723449707,"stations":2},{"datetime_utc":"2026-05-29T09:00:00Z","aqi":8,"aqi_min":8,"aqi_max":8,"pm25":2.0338947772979736,"pm10":1.2467808723449707,"stations":2},{"datetime_utc":"2026-05-29T10:00:00Z","aqi":75,"aqi_min":75,"aqi_max":75,"pm25":23.447603225708008,"pm10":25.559009552001953,"stations":2},{"datetime_utc":"2026-05-29T11:00:00Z","aqi":39,"aqi_min":39,"aqi_max":39,"pm25":9.324291229248047,"pm10":8.10407543182373,"stations":2},{"datetime_utc":"2026-05-29T12:00:00Z","aqi":13,"aqi_min":13,"aqi_max":13,"pm25":3.090386390686035,"pm10":1.870171308517456,"stations":2},{"datetime_utc":"2026-05-29T13:00:00Z","aqi":13,"aqi_min":13,"aqi_max":13,"pm25":3.1958370208740234,"pm10":2.4935617446899414,"stations":2},{"datetime_utc":"2026-05-29T14:00:00Z","aqi":13,"aqi_min":13,"aqi_max":13,"pm25":3.090386390686035,"pm10":1.870171308517456,"stations":2},{"datetime_utc":"2026-05-29T15:00:00Z","aqi":10,"aqi_min":10,"aqi_max":10,"pm25":2.3766095638275146,"pm10":1.2467808723449707,"stations":2},{"datetime_utc":"2026-05-29T16:00:00Z","aqi":22,"aqi_min":22,"aqi_max":22,"pm25":5.246780872344971,"pm10":3.740342617034912,"stations":2},{"datetime_utc":"2026-05-29T17:00:00Z","aqi":17,"aqi_min":17,"aqi_max":17,"pm25":4.086620330810547,"pm10":2.4935617446899414,"stations":2},{"datetime_utc":"2026-05-29T18:00:00Z","aqi":19,"aqi_min":19,"aqi_max":19,"pm25":4.570664882659912,"pm10":6.2339043617248535,"stations":2},{"datetime_utc":"2026-05-29T19:00:00Z","aqi":74,"aqi_min":74,"aqi_max":74,"pm25":23.234718322753906,"pm10":26.805789947509766,"stations":2},{"datetime_utc":"2026-05-29T20:00:00Z","aqi":36,"aqi_min":36,"aqi_max":36,"pm25":8.745890617370605,"pm10":6.2339043617248535,"stations":2},{"datetime_utc":"2026-05-29T21:00:00Z","aqi":40,"aqi_min":40,"aqi_max":40,"pm25":9.533003807067871,"pm10":6.2339043617248535,"stations":2},{"datetime_utc":"2026-05-29T22:00:00Z","aqi":74,"aqi_min":74,"aqi_max":74,"pm25":23.27237892150879,"pm10":23.6888370513916,"stations":2},{"datetime_utc":"2026-05-29T23:00:00Z","aqi":75,"aqi_min":75,"aqi_max":75,"pm25":23.43630599975586,"pm10":26.805789947509766,"stations":2},{"datetime_utc":"2026-05-30T00:00:00Z","aqi":12,"aqi_min":12,"aqi_max":12,"pm25":2.947274684906006,"pm10":3.1169521808624268,"stations":2},{"datetime_utc":"2026-05-30T01:00:00Z","aqi":13,"aqi_min":13,"aqi_max":13,"pm25":3.140000104904175,"pm10":null,"stations":1},{"datetime_utc":"2026-05-30T02:00:00Z","aqi":4,"aqi_min":4,"aqi_max":4,"pm25":1.0,"pm10":null,"stations":1},{"datetime_utc":"2026-05-30T03:00:00Z","aqi":12,"aqi_min":12,"aqi_max":12,"pm25":2.9867169857025146,"pm10":1.2467808723449707,"stations":2},{"datetime_utc":"2026-05-30T05:00:00Z","aqi":5,"aqi_min":5,"aqi_max":5,"pm25":1.100000023841858,"pm10":null,"stations":1},{"datetime_utc":"2026-05-30T06:00:00Z","aqi":4,"aqi_min":4,"aqi_max":4,"pm25":1.0399999618530273,"pm10":null,"stations":1},{"datetime_utc":"2026-05-30T07:00:00Z","aqi":11,"aqi_min":11,"aqi_max":11,"pm25":2.75,"pm10":null,"stations":1}],"daily":[{"date":"2026-05-28","aqi_avg":14,"aqi_min":2,"aqi_max":53,"aqi_color":"#059669","aqi_label":"Good","pm25_avg":3.1,"pm10_avg":5.4,"hours":11,"stations_avg":1},{"date":"2026-05-29","aqi_avg":24,"aqi_min":3,"aqi_max":75,"aqi_color":"#059669","aqi_label":"Good","pm25_avg":6.7,"pm10_avg":6.9,"hours":24,"stations_avg":2},{"date":"2026-05-30","aqi_avg":9,"aqi_min":4,"aqi_max":13,"aqi_color":"#059669","aqi_label":"Good","pm25_avg":2.1,"pm10_avg":2.2,"hours":7,"stations_avg":1}]}