{"city":"Heyan","country":"China","lat":31.35638999938965,"lon":108.67044830322266,"range":"7d","license":"CC BY 4.0","source":"https://cerns.io","hourly":[{"datetime_utc":"2026-05-23T05:00:00Z","aqi":59,"aqi_min":59,"aqi_max":59,"pm25":15.9,"pm10":null,"stations":1},{"datetime_utc":"2026-05-23T07:00:00Z","aqi":59,"aqi_min":59,"aqi_max":59,"pm25":15.9,"pm10":null,"stations":1},{"datetime_utc":"2026-05-23T08:00:00Z","aqi":21,"aqi_min":21,"aqi_max":21,"pm25":5.04,"pm10":null,"stations":1},{"datetime_utc":"2026-05-23T12:00:00Z","aqi":59,"aqi_min":59,"aqi_max":59,"pm25":15.9,"pm10":null,"stations":1},{"datetime_utc":"2026-05-23T22:00:00Z","aqi":42,"aqi_min":42,"aqi_max":42,"pm25":10.08,"pm10":null,"stations":1},{"datetime_utc":"2026-05-24T02:00:00Z","aqi":53,"aqi_min":53,"aqi_max":53,"pm25":13.05,"pm10":null,"stations":1},{"datetime_utc":"2026-05-24T03:00:00Z","aqi":55,"aqi_min":55,"aqi_max":55,"pm25":14.0,"pm10":null,"stations":1},{"datetime_utc":"2026-05-24T04:00:00Z","aqi":55,"aqi_min":55,"aqi_max":55,"pm25":14.0,"pm10":null,"stations":1},{"datetime_utc":"2026-05-24T06:00:00Z","aqi":57,"aqi_min":57,"aqi_max":57,"pm25":14.95,"pm10":null,"stations":1},{"datetime_utc":"2026-05-24T07:00:00Z","aqi":38,"aqi_min":38,"aqi_max":38,"pm25":9.12,"pm10":null,"stations":1},{"datetime_utc":"2026-05-24T13:00:00Z","aqi":38,"aqi_min":38,"aqi_max":38,"pm25":9.12,"pm10":null,"stations":1},{"datetime_utc":"2026-05-24T14:00:00Z","aqi":38,"aqi_min":38,"aqi_max":38,"pm25":9.12,"pm10":null,"stations":1},{"datetime_utc":"2026-05-24T18:00:00Z","aqi":46,"aqi_min":46,"aqi_max":46,"pm25":11.04,"pm10":null,"stations":1},{"datetime_utc":"2026-05-25T01:00:00Z","aqi":74,"aqi_min":74,"aqi_max":74,"pm25":23.04,"pm10":null,"stations":1},{"datetime_utc":"2026-05-25T02:00:00Z","aqi":55,"aqi_min":55,"aqi_max":55,"pm25":14.0,"pm10":null,"stations":1},{"datetime_utc":"2026-05-25T08:00:00Z","aqi":34,"aqi_min":34,"aqi_max":34,"pm25":8.16,"pm10":null,"stations":1},{"datetime_utc":"2026-05-25T09:00:00Z","aqi":59,"aqi_min":59,"aqi_max":59,"pm25":15.9,"pm10":null,"stations":1},{"datetime_utc":"2026-05-25T10:00:00Z","aqi":53,"aqi_min":53,"aqi_max":53,"pm25":13.05,"pm10":null,"stations":1},{"datetime_utc":"2026-05-25T11:00:00Z","aqi":46,"aqi_min":46,"aqi_max":46,"pm25":11.04,"pm10":null,"stations":1},{"datetime_utc":"2026-05-25T13:00:00Z","aqi":68,"aqi_min":68,"aqi_max":68,"pm25":20.18,"pm10":null,"stations":1},{"datetime_utc":"2026-05-25T16:00:00Z","aqi":97,"aqi_min":97,"aqi_max":97,"pm25":33.97,"pm10":null,"stations":1},{"datetime_utc":"2026-05-25T17:00:00Z","aqi":25,"aqi_min":25,"aqi_max":25,"pm25":6.0,"pm10":null,"stations":1},{"datetime_utc":"2026-05-25T19:00:00Z","aqi":55,"aqi_min":55,"aqi_max":55,"pm25":14.0,"pm10":null,"stations":1},{"datetime_utc":"2026-05-25T20:00:00Z","aqi":22,"aqi_min":22,"aqi_max":22,"pm25":5.28,"pm10":null,"stations":1},{"datetime_utc":"2026-05-25T22:00:00Z","aqi":19,"aqi_min":19,"aqi_max":19,"pm25":4.56,"pm10":null,"stations":1},{"datetime_utc":"2026-05-25T23:00:00Z","aqi":59,"aqi_min":59,"aqi_max":59,"pm25":15.9,"pm10":null,"stations":1},{"datetime_utc":"2026-05-26T02:00:00Z","aqi":59,"aqi_min":59,"aqi_max":59,"pm25":15.9,"pm10":null,"stations":1},{"datetime_utc":"2026-05-26T08:00:00Z","aqi":59,"aqi_min":59,"aqi_max":59,"pm25":15.9,"pm10":null,"stations":1},{"datetime_utc":"2026-05-26T10:00:00Z","aqi":59,"aqi_min":59,"aqi_max":59,"pm25":15.9,"pm10":null,"stations":1},{"datetime_utc":"2026-05-26T12:00:00Z","aqi":63,"aqi_min":63,"aqi_max":63,"pm25":17.81,"pm10":null,"stations":1},{"datetime_utc":"2026-05-26T13:00:00Z","aqi":42,"aqi_min":42,"aqi_max":42,"pm25":10.08,"pm10":null,"stations":1},{"datetime_utc":"2026-05-26T14:00:00Z","aqi":154,"aqi_min":154,"aqi_max":154,"pm25":61.31,"pm10":null,"stations":1},{"datetime_utc":"2026-05-26T15:00:00Z","aqi":25,"aqi_min":25,"aqi_max":25,"pm25":6.0,"pm10":null,"stations":1},{"datetime_utc":"2026-05-26T18:00:00Z","aqi":61,"aqi_min":61,"aqi_max":61,"pm25":16.86,"pm10":null,"stations":1},{"datetime_utc":"2026-05-26T23:00:00Z","aqi":57,"aqi_min":57,"aqi_max":57,"pm25":14.95,"pm10":null,"stations":1},{"datetime_utc":"2026-05-27T03:00:00Z","aqi":62,"aqi_min":62,"aqi_max":62,"pm25":17.33,"pm10":null,"stations":1},{"datetime_utc":"2026-05-27T04:00:00Z","aqi":55,"aqi_min":55,"aqi_max":55,"pm25":14.0,"pm10":null,"stations":1},{"datetime_utc":"2026-05-27T06:00:00Z","aqi":56,"aqi_min":56,"aqi_max":56,"pm25":14.48,"pm10":null,"stations":1},{"datetime_utc":"2026-05-27T08:00:00Z","aqi":70,"aqi_min":70,"aqi_max":70,"pm25":21.13,"pm10":null,"stations":1},{"datetime_utc":"2026-05-27T10:00:00Z","aqi":22,"aqi_min":22,"aqi_max":22,"pm25":5.28,"pm10":null,"stations":1},{"datetime_utc":"2026-05-27T11:00:00Z","aqi":65,"aqi_min":65,"aqi_max":65,"pm25":18.76,"pm10":null,"stations":1},{"datetime_utc":"2026-05-27T12:00:00Z","aqi":61,"aqi_min":61,"aqi_max":61,"pm25":16.86,"pm10":null,"stations":1},{"datetime_utc":"2026-05-27T13:00:00Z","aqi":63,"aqi_min":63,"aqi_max":63,"pm25":17.81,"pm10":null,"stations":1},{"datetime_utc":"2026-05-27T14:00:00Z","aqi":78,"aqi_min":78,"aqi_max":78,"pm25":24.94,"pm10":null,"stations":1},{"datetime_utc":"2026-05-27T16:00:00Z","aqi":51,"aqi_min":51,"aqi_max":51,"pm25":12.1,"pm10":null,"stations":1},{"datetime_utc":"2026-05-27T18:00:00Z","aqi":74,"aqi_min":74,"aqi_max":74,"pm25":23.04,"pm10":null,"stations":1},{"datetime_utc":"2026-05-27T19:00:00Z","aqi":38,"aqi_min":38,"aqi_max":38,"pm25":9.12,"pm10":null,"stations":1},{"datetime_utc":"2026-05-27T20:00:00Z","aqi":59,"aqi_min":59,"aqi_max":59,"pm25":15.9,"pm10":null,"stations":1},{"datetime_utc":"2026-05-27T23:00:00Z","aqi":65,"aqi_min":65,"aqi_max":65,"pm25":18.76,"pm10":null,"stations":1},{"datetime_utc":"2026-05-28T02:00:00Z","aqi":59,"aqi_min":59,"aqi_max":59,"pm25":15.9,"pm10":null,"stations":1},{"datetime_utc":"2026-05-28T05:00:00Z","aqi":62,"aqi_min":62,"aqi_max":62,"pm25":17.33,"pm10":null,"stations":1},{"datetime_utc":"2026-05-28T07:00:00Z","aqi":83,"aqi_min":83,"aqi_max":83,"pm25":27.32,"pm10":null,"stations":1},{"datetime_utc":"2026-05-28T10:00:00Z","aqi":55,"aqi_min":55,"aqi_max":55,"pm25":14.0,"pm10":null,"stations":1},{"datetime_utc":"2026-05-28T11:00:00Z","aqi":46,"aqi_min":46,"aqi_max":46,"pm25":11.04,"pm10":null,"stations":1},{"datetime_utc":"2026-05-28T12:00:00Z","aqi":57,"aqi_min":57,"aqi_max":57,"pm25":14.95,"pm10":null,"stations":1},{"datetime_utc":"2026-05-28T17:00:00Z","aqi":104,"aqi_min":104,"aqi_max":104,"pm25":36.72,"pm10":null,"stations":1},{"datetime_utc":"2026-05-28T22:00:00Z","aqi":55,"aqi_min":55,"aqi_max":55,"pm25":14.0,"pm10":null,"stations":1},{"datetime_utc":"2026-05-29T00:00:00Z","aqi":65,"aqi_min":65,"aqi_max":65,"pm25":18.76,"pm10":null,"stations":1},{"datetime_utc":"2026-05-29T02:00:00Z","aqi":72,"aqi_min":72,"aqi_max":72,"pm25":22.09,"pm10":null,"stations":1},{"datetime_utc":"2026-05-29T04:00:00Z","aqi":70,"aqi_min":70,"aqi_max":70,"pm25":21.13,"pm10":null,"stations":1},{"datetime_utc":"2026-05-29T07:00:00Z","aqi":109,"aqi_min":109,"aqi_max":109,"pm25":38.75,"pm10":null,"stations":1},{"datetime_utc":"2026-05-29T10:00:00Z","aqi":70,"aqi_min":70,"aqi_max":70,"pm25":21.13,"pm10":null,"stations":1},{"datetime_utc":"2026-05-29T11:00:00Z","aqi":34,"aqi_min":34,"aqi_max":34,"pm25":8.16,"pm10":null,"stations":1},{"datetime_utc":"2026-05-29T12:00:00Z","aqi":55,"aqi_min":55,"aqi_max":55,"pm25":14.0,"pm10":null,"stations":1},{"datetime_utc":"2026-05-29T13:00:00Z","aqi":42,"aqi_min":42,"aqi_max":42,"pm25":10.08,"pm10":null,"stations":1},{"datetime_utc":"2026-05-29T16:00:00Z","aqi":18,"aqi_min":18,"aqi_max":18,"pm25":4.32,"pm10":null,"stations":1},{"datetime_utc":"2026-05-29T17:00:00Z","aqi":59,"aqi_min":59,"aqi_max":59,"pm25":15.9,"pm10":null,"stations":1},{"datetime_utc":"2026-05-29T18:00:00Z","aqi":42,"aqi_min":42,"aqi_max":42,"pm25":10.08,"pm10":null,"stations":1},{"datetime_utc":"2026-05-29T19:00:00Z","aqi":53,"aqi_min":53,"aqi_max":53,"pm25":13.05,"pm10":null,"stations":1},{"datetime_utc":"2026-05-29T21:00:00Z","aqi":50,"aqi_min":50,"aqi_max":50,"pm25":12.0,"pm10":null,"stations":1},{"datetime_utc":"2026-05-29T22:00:00Z","aqi":55,"aqi_min":55,"aqi_max":55,"pm25":14.0,"pm10":null,"stations":1},{"datetime_utc":"2026-05-30T01:00:00Z","aqi":34,"aqi_min":34,"aqi_max":34,"pm25":8.16,"pm10":null,"stations":1},{"datetime_utc":"2026-05-30T03:00:00Z","aqi":21,"aqi_min":21,"aqi_max":21,"pm25":5.04,"pm10":null,"stations":1}],"daily":[{"date":"2026-05-23","aqi_avg":48,"aqi_min":21,"aqi_max":59,"aqi_color":"#059669","aqi_label":"Good","pm25_avg":12.6,"pm10_avg":null,"hours":5,"stations_avg":1},{"date":"2026-05-24","aqi_avg":48,"aqi_min":38,"aqi_max":57,"aqi_color":"#059669","aqi_label":"Good","pm25_avg":11.8,"pm10_avg":null,"hours":8,"stations_avg":1},{"date":"2026-05-25","aqi_avg":51,"aqi_min":19,"aqi_max":97,"aqi_color":"#d97706","aqi_label":"Moderate","pm25_avg":14.2,"pm10_avg":null,"hours":13,"stations_avg":1},{"date":"2026-05-26","aqi_avg":64,"aqi_min":25,"aqi_max":154,"aqi_color":"#d97706","aqi_label":"Moderate","pm25_avg":19.4,"pm10_avg":null,"hours":9,"stations_avg":1},{"date":"2026-05-27","aqi_avg":58,"aqi_min":22,"aqi_max":78,"aqi_color":"#d97706","aqi_label":"Moderate","pm25_avg":16.4,"pm10_avg":null,"hours":14,"stations_avg":1},{"date":"2026-05-28","aqi_avg":65,"aqi_min":46,"aqi_max":104,"aqi_color":"#d97706","aqi_label":"Moderate","pm25_avg":18.9,"pm10_avg":null,"hours":8,"stations_avg":1},{"date":"2026-05-29","aqi_avg":57,"aqi_min":18,"aqi_max":109,"aqi_color":"#d97706","aqi_label":"Moderate","pm25_avg":16.0,"pm10_avg":null,"hours":14,"stations_avg":1},{"date":"2026-05-30","aqi_avg":28,"aqi_min":21,"aqi_max":34,"aqi_color":"#059669","aqi_label":"Good","pm25_avg":6.6,"pm10_avg":null,"hours":2,"stations_avg":1}]}