{"city":"Saint Charles","country":"United States","lat":38.60316848754883,"lon":-76.93858337402344,"range":"48h","license":"CC BY 4.0","source":"https://cerns.io","hourly":[{"datetime_utc":"2026-05-28T10:00:00Z","aqi":18,"aqi_min":9,"aqi_max":30,"pm25":4.36,"pm10":null,"stations":5},{"datetime_utc":"2026-05-28T11:00:00Z","aqi":28,"aqi_min":25,"aqi_max":32,"pm25":6.77,"pm10":null,"stations":2},{"datetime_utc":"2026-05-28T12:00:00Z","aqi":26,"aqi_min":25,"aqi_max":28,"pm25":6.32,"pm10":null,"stations":2},{"datetime_utc":"2026-05-28T13:00:00Z","aqi":20,"aqi_min":16,"aqi_max":24,"pm25":4.79,"pm10":null,"stations":2},{"datetime_utc":"2026-05-28T14:00:00Z","aqi":29,"aqi_min":18,"aqi_max":46,"pm25":6.91,"pm10":null,"stations":3},{"datetime_utc":"2026-05-28T15:00:00Z","aqi":21,"aqi_min":18,"aqi_max":26,"pm25":5.03,"pm10":null,"stations":4},{"datetime_utc":"2026-05-28T16:00:00Z","aqi":23,"aqi_min":18,"aqi_max":30,"pm25":5.4,"pm10":null,"stations":3},{"datetime_utc":"2026-05-28T17:00:00Z","aqi":18,"aqi_min":18,"aqi_max":19,"pm25":4.42,"pm10":null,"stations":4},{"datetime_utc":"2026-05-28T18:00:00Z","aqi":20,"aqi_min":17,"aqi_max":23,"pm25":4.84,"pm10":null,"stations":3},{"datetime_utc":"2026-05-28T19:00:00Z","aqi":18,"aqi_min":16,"aqi_max":19,"pm25":4.26,"pm10":null,"stations":5},{"datetime_utc":"2026-05-28T20:00:00Z","aqi":22,"aqi_min":18,"aqi_max":28,"pm25":5.16,"pm10":null,"stations":4},{"datetime_utc":"2026-05-28T21:00:00Z","aqi":20,"aqi_min":16,"aqi_max":23,"pm25":4.85,"pm10":null,"stations":5},{"datetime_utc":"2026-05-28T22:00:00Z","aqi":22,"aqi_min":22,"aqi_max":22,"pm25":5.28,"pm10":null,"stations":1},{"datetime_utc":"2026-05-28T23:00:00Z","aqi":108,"aqi_min":18,"aqi_max":160,"pm25":38.54,"pm10":null,"stations":2},{"datetime_utc":"2026-05-29T00:00:00Z","aqi":18,"aqi_min":11,"aqi_max":25,"pm25":4.26,"pm10":null,"stations":3},{"datetime_utc":"2026-05-29T01:00:00Z","aqi":15,"aqi_min":13,"aqi_max":17,"pm25":3.49,"pm10":null,"stations":4},{"datetime_utc":"2026-05-29T02:00:00Z","aqi":15,"aqi_min":11,"aqi_max":17,"pm25":3.48,"pm10":null,"stations":5},{"datetime_utc":"2026-05-29T03:00:00Z","aqi":15,"aqi_min":9,"aqi_max":20,"pm25":3.64,"pm10":null,"stations":5},{"datetime_utc":"2026-05-29T04:00:00Z","aqi":13,"aqi_min":11,"aqi_max":15,"pm25":3.16,"pm10":null,"stations":2},{"datetime_utc":"2026-05-29T05:00:00Z","aqi":16,"aqi_min":4,"aqi_max":30,"pm25":3.93,"pm10":null,"stations":5},{"datetime_utc":"2026-05-29T06:00:00Z","aqi":20,"aqi_min":15,"aqi_max":23,"pm25":4.67,"pm10":null,"stations":3},{"datetime_utc":"2026-05-29T07:00:00Z","aqi":13,"aqi_min":11,"aqi_max":15,"pm25":3.14,"pm10":null,"stations":2},{"datetime_utc":"2026-05-29T08:00:00Z","aqi":20,"aqi_min":15,"aqi_max":26,"pm25":4.86,"pm10":null,"stations":2},{"datetime_utc":"2026-05-29T09:00:00Z","aqi":20,"aqi_min":14,"aqi_max":30,"pm25":4.94,"pm10":null,"stations":4},{"datetime_utc":"2026-05-29T10:00:00Z","aqi":18,"aqi_min":11,"aqi_max":28,"pm25":4.41,"pm10":null,"stations":6},{"datetime_utc":"2026-05-29T11:00:00Z","aqi":12,"aqi_min":5,"aqi_max":16,"pm25":2.82,"pm10":null,"stations":3},{"datetime_utc":"2026-05-29T12:00:00Z","aqi":16,"aqi_min":11,"aqi_max":21,"pm25":3.91,"pm10":null,"stations":4},{"datetime_utc":"2026-05-29T13:00:00Z","aqi":22,"aqi_min":9,"aqi_max":37,"pm25":5.2,"pm10":null,"stations":5},{"datetime_utc":"2026-05-29T14:00:00Z","aqi":21,"aqi_min":15,"aqi_max":28,"pm25":5.13,"pm10":null,"stations":4},{"datetime_utc":"2026-05-29T15:00:00Z","aqi":23,"aqi_min":15,"aqi_max":31,"pm25":5.55,"pm10":null,"stations":4},{"datetime_utc":"2026-05-29T16:00:00Z","aqi":30,"aqi_min":15,"aqi_max":45,"pm25":7.16,"pm10":null,"stations":2},{"datetime_utc":"2026-05-29T17:00:00Z","aqi":32,"aqi_min":15,"aqi_max":47,"pm25":7.55,"pm10":null,"stations":4},{"datetime_utc":"2026-05-29T18:00:00Z","aqi":30,"aqi_min":16,"aqi_max":45,"pm25":7.1,"pm10":null,"stations":3},{"datetime_utc":"2026-05-29T19:00:00Z","aqi":37,"aqi_min":17,"aqi_max":49,"pm25":8.84,"pm10":null,"stations":3},{"datetime_utc":"2026-05-29T20:00:00Z","aqi":25,"aqi_min":18,"aqi_max":44,"pm25":6.14,"pm10":null,"stations":4},{"datetime_utc":"2026-05-29T21:00:00Z","aqi":29,"aqi_min":17,"aqi_max":46,"pm25":6.95,"pm10":null,"stations":6},{"datetime_utc":"2026-05-29T22:00:00Z","aqi":25,"aqi_min":17,"aqi_max":39,"pm25":5.96,"pm10":null,"stations":6},{"datetime_utc":"2026-05-29T23:00:00Z","aqi":28,"aqi_min":18,"aqi_max":38,"pm25":6.64,"pm10":null,"stations":5},{"datetime_utc":"2026-05-30T00:00:00Z","aqi":24,"aqi_min":19,"aqi_max":29,"pm25":5.75,"pm10":null,"stations":2},{"datetime_utc":"2026-05-30T01:00:00Z","aqi":26,"aqi_min":22,"aqi_max":30,"pm25":6.18,"pm10":null,"stations":2},{"datetime_utc":"2026-05-30T02:00:00Z","aqi":23,"aqi_min":17,"aqi_max":30,"pm25":5.55,"pm10":null,"stations":3},{"datetime_utc":"2026-05-30T03:00:00Z","aqi":21,"aqi_min":19,"aqi_max":23,"pm25":5.03,"pm10":null,"stations":2},{"datetime_utc":"2026-05-30T04:00:00Z","aqi":30,"aqi_min":23,"aqi_max":37,"pm25":7.07,"pm10":null,"stations":3},{"datetime_utc":"2026-05-30T05:00:00Z","aqi":33,"aqi_min":22,"aqi_max":51,"pm25":7.92,"pm10":null,"stations":5},{"datetime_utc":"2026-05-30T06:00:00Z","aqi":20,"aqi_min":6,"aqi_max":25,"pm25":4.88,"pm10":null,"stations":6}],"daily":[{"date":"2026-05-28","aqi_avg":28,"aqi_min":18,"aqi_max":108,"aqi_color":"#059669","aqi_label":"Good","pm25_avg":7.6,"pm10_avg":null,"hours":14,"stations_avg":3},{"date":"2026-05-29","aqi_avg":21,"aqi_min":12,"aqi_max":37,"aqi_color":"#059669","aqi_label":"Good","pm25_avg":5.1,"pm10_avg":null,"hours":24,"stations_avg":4},{"date":"2026-05-30","aqi_avg":25,"aqi_min":20,"aqi_max":33,"aqi_color":"#059669","aqi_label":"Good","pm25_avg":6.1,"pm10_avg":null,"hours":7,"stations_avg":3}]}