{"city":"South Riding","country":"United States","lat":38.92094039916992,"lon":-77.5038833618164,"range":"48h","license":"CC BY 4.0","source":"https://cerns.io","hourly":[{"datetime_utc":"2026-05-27T22:00:00Z","aqi":35,"aqi_min":23,"aqi_max":47,"pm25":8.47,"pm10":null,"stations":7},{"datetime_utc":"2026-05-27T23:00:00Z","aqi":48,"aqi_min":18,"aqi_max":63,"pm25":11.47,"pm10":null,"stations":7},{"datetime_utc":"2026-05-28T00:00:00Z","aqi":26,"aqi_min":14,"aqi_max":42,"pm25":6.35,"pm10":null,"stations":9},{"datetime_utc":"2026-05-28T01:00:00Z","aqi":30,"aqi_min":16,"aqi_max":38,"pm25":7.28,"pm10":null,"stations":6},{"datetime_utc":"2026-05-28T02:00:00Z","aqi":28,"aqi_min":9,"aqi_max":49,"pm25":6.8,"pm10":null,"stations":12},{"datetime_utc":"2026-05-28T03:00:00Z","aqi":34,"aqi_min":29,"aqi_max":46,"pm25":8.16,"pm10":null,"stations":4},{"datetime_utc":"2026-05-28T04:00:00Z","aqi":26,"aqi_min":17,"aqi_max":37,"pm25":6.32,"pm10":null,"stations":9},{"datetime_utc":"2026-05-28T05:00:00Z","aqi":20,"aqi_min":7,"aqi_max":33,"pm25":4.88,"pm10":null,"stations":6},{"datetime_utc":"2026-05-28T06:00:00Z","aqi":23,"aqi_min":1,"aqi_max":35,"pm25":5.39,"pm10":null,"stations":9},{"datetime_utc":"2026-05-28T07:00:00Z","aqi":20,"aqi_min":10,"aqi_max":29,"pm25":4.68,"pm10":null,"stations":8},{"datetime_utc":"2026-05-28T08:00:00Z","aqi":25,"aqi_min":17,"aqi_max":38,"pm25":5.93,"pm10":null,"stations":7},{"datetime_utc":"2026-05-28T09:00:00Z","aqi":21,"aqi_min":3,"aqi_max":41,"pm25":4.97,"pm10":null,"stations":7},{"datetime_utc":"2026-05-28T10:00:00Z","aqi":22,"aqi_min":5,"aqi_max":31,"pm25":5.21,"pm10":null,"stations":10},{"datetime_utc":"2026-05-28T11:00:00Z","aqi":25,"aqi_min":9,"aqi_max":38,"pm25":5.87,"pm10":null,"stations":11},{"datetime_utc":"2026-05-28T12:00:00Z","aqi":22,"aqi_min":3,"aqi_max":33,"pm25":5.31,"pm10":null,"stations":8},{"datetime_utc":"2026-05-28T13:00:00Z","aqi":24,"aqi_min":7,"aqi_max":32,"pm25":5.68,"pm10":null,"stations":9},{"datetime_utc":"2026-05-28T14:00:00Z","aqi":26,"aqi_min":16,"aqi_max":34,"pm25":6.22,"pm10":null,"stations":11},{"datetime_utc":"2026-05-28T15:00:00Z","aqi":28,"aqi_min":18,"aqi_max":34,"pm25":6.69,"pm10":null,"stations":9},{"datetime_utc":"2026-05-28T16:00:00Z","aqi":28,"aqi_min":18,"aqi_max":37,"pm25":6.69,"pm10":null,"stations":8},{"datetime_utc":"2026-05-28T17:00:00Z","aqi":29,"aqi_min":5,"aqi_max":55,"pm25":6.99,"pm10":null,"stations":11},{"datetime_utc":"2026-05-28T18:00:00Z","aqi":29,"aqi_min":13,"aqi_max":38,"pm25":6.91,"pm10":null,"stations":9},{"datetime_utc":"2026-05-28T19:00:00Z","aqi":30,"aqi_min":20,"aqi_max":36,"pm25":7.2,"pm10":null,"stations":10},{"datetime_utc":"2026-05-28T20:00:00Z","aqi":30,"aqi_min":22,"aqi_max":36,"pm25":7.2,"pm10":null,"stations":7},{"datetime_utc":"2026-05-28T21:00:00Z","aqi":31,"aqi_min":22,"aqi_max":42,"pm25":7.52,"pm10":null,"stations":3},{"datetime_utc":"2026-05-28T22:00:00Z","aqi":27,"aqi_min":12,"aqi_max":37,"pm25":6.41,"pm10":null,"stations":7},{"datetime_utc":"2026-05-28T23:00:00Z","aqi":23,"aqi_min":12,"aqi_max":44,"pm25":5.6,"pm10":null,"stations":3},{"datetime_utc":"2026-05-29T00:00:00Z","aqi":28,"aqi_min":16,"aqi_max":42,"pm25":6.6,"pm10":null,"stations":6},{"datetime_utc":"2026-05-29T01:00:00Z","aqi":26,"aqi_min":15,"aqi_max":36,"pm25":6.24,"pm10":null,"stations":11},{"datetime_utc":"2026-05-29T02:00:00Z","aqi":26,"aqi_min":15,"aqi_max":56,"pm25":6.33,"pm10":null,"stations":9},{"datetime_utc":"2026-05-29T03:00:00Z","aqi":25,"aqi_min":16,"aqi_max":38,"pm25":6.14,"pm10":null,"stations":7},{"datetime_utc":"2026-05-29T04:00:00Z","aqi":19,"aqi_min":5,"aqi_max":30,"pm25":4.52,"pm10":null,"stations":11},{"datetime_utc":"2026-05-29T05:00:00Z","aqi":16,"aqi_min":5,"aqi_max":25,"pm25":3.76,"pm10":null,"stations":3},{"datetime_utc":"2026-05-29T06:00:00Z","aqi":17,"aqi_min":9,"aqi_max":28,"pm25":4.03,"pm10":null,"stations":5},{"datetime_utc":"2026-05-29T07:00:00Z","aqi":12,"aqi_min":1,"aqi_max":26,"pm25":2.88,"pm10":null,"stations":10},{"datetime_utc":"2026-05-29T08:00:00Z","aqi":20,"aqi_min":5,"aqi_max":30,"pm25":4.68,"pm10":null,"stations":8},{"datetime_utc":"2026-05-29T09:00:00Z","aqi":14,"aqi_min":10,"aqi_max":26,"pm25":3.36,"pm10":null,"stations":7},{"datetime_utc":"2026-05-29T10:00:00Z","aqi":12,"aqi_min":2,"aqi_max":18,"pm25":2.95,"pm10":null,"stations":10},{"datetime_utc":"2026-05-29T11:00:00Z","aqi":22,"aqi_min":13,"aqi_max":30,"pm25":5.18,"pm10":null,"stations":5},{"datetime_utc":"2026-05-29T12:00:00Z","aqi":14,"aqi_min":3,"aqi_max":24,"pm25":3.39,"pm10":null,"stations":9},{"datetime_utc":"2026-05-29T13:00:00Z","aqi":16,"aqi_min":13,"aqi_max":28,"pm25":3.84,"pm10":null,"stations":8},{"datetime_utc":"2026-05-29T14:00:00Z","aqi":25,"aqi_min":9,"aqi_max":38,"pm25":6.0,"pm10":null,"stations":6},{"datetime_utc":"2026-05-29T15:00:00Z","aqi":20,"aqi_min":14,"aqi_max":35,"pm25":4.9,"pm10":null,"stations":7},{"datetime_utc":"2026-05-29T16:00:00Z","aqi":17,"aqi_min":15,"aqi_max":18,"pm25":4.03,"pm10":null,"stations":10},{"datetime_utc":"2026-05-29T17:00:00Z","aqi":16,"aqi_min":14,"aqi_max":19,"pm25":3.94,"pm10":null,"stations":7},{"datetime_utc":"2026-05-29T18:00:00Z","aqi":19,"aqi_min":16,"aqi_max":21,"pm25":4.47,"pm10":null,"stations":8},{"datetime_utc":"2026-05-29T19:00:00Z","aqi":18,"aqi_min":15,"aqi_max":21,"pm25":4.18,"pm10":null,"stations":7},{"datetime_utc":"2026-05-29T20:00:00Z","aqi":36,"aqi_min":36,"aqi_max":36,"pm25":8.64,"pm10":null,"stations":1}],"daily":[{"date":"2026-05-27","aqi_avg":42,"aqi_min":35,"aqi_max":48,"aqi_color":"#059669","aqi_label":"Good","pm25_avg":10.0,"pm10_avg":null,"hours":2,"stations_avg":7},{"date":"2026-05-28","aqi_avg":26,"aqi_min":20,"aqi_max":34,"aqi_color":"#059669","aqi_label":"Good","pm25_avg":6.3,"pm10_avg":null,"hours":24,"stations_avg":8},{"date":"2026-05-29","aqi_avg":20,"aqi_min":12,"aqi_max":36,"aqi_color":"#059669","aqi_label":"Good","pm25_avg":4.8,"pm10_avg":null,"hours":21,"stations_avg":7}]}