{"city":"Castro Valley","country":"United States","lat":37.69409942626953,"lon":-122.08634948730469,"range":"48h","license":"CC BY 4.0","source":"https://cerns.io","hourly":[{"datetime_utc":"2026-06-07T14:00:00Z","aqi":26,"aqi_min":5,"aqi_max":50,"pm25":6.34,"pm10":3.46,"stations":116},{"datetime_utc":"2026-06-07T15:00:00Z","aqi":27,"aqi_min":2,"aqi_max":68,"pm25":6.39,"pm10":3.58,"stations":120},{"datetime_utc":"2026-06-07T16:00:00Z","aqi":27,"aqi_min":3,"aqi_max":47,"pm25":6.39,"pm10":2.28,"stations":115},{"datetime_utc":"2026-06-07T17:00:00Z","aqi":27,"aqi_min":6,"aqi_max":50,"pm25":6.35,"pm10":2.92,"stations":115},{"datetime_utc":"2026-06-07T18:00:00Z","aqi":26,"aqi_min":2,"aqi_max":49,"pm25":6.29,"pm10":1.58,"stations":118},{"datetime_utc":"2026-06-07T19:00:00Z","aqi":26,"aqi_min":2,"aqi_max":55,"pm25":6.27,"pm10":1.83,"stations":117},{"datetime_utc":"2026-06-07T20:00:00Z","aqi":27,"aqi_min":3,"aqi_max":69,"pm25":6.5,"pm10":1.66,"stations":116},{"datetime_utc":"2026-06-07T21:00:00Z","aqi":26,"aqi_min":2,"aqi_max":53,"pm25":6.25,"pm10":3.87,"stations":115},{"datetime_utc":"2026-06-07T22:00:00Z","aqi":26,"aqi_min":5,"aqi_max":50,"pm25":6.23,"pm10":1.45,"stations":118},{"datetime_utc":"2026-06-07T23:00:00Z","aqi":25,"aqi_min":3,"aqi_max":48,"pm25":6.14,"pm10":3.02,"stations":114},{"datetime_utc":"2026-06-08T00:00:00Z","aqi":26,"aqi_min":2,"aqi_max":55,"pm25":6.32,"pm10":3.66,"stations":115},{"datetime_utc":"2026-06-08T01:00:00Z","aqi":26,"aqi_min":5,"aqi_max":50,"pm25":6.28,"pm10":4.56,"stations":121},{"datetime_utc":"2026-06-08T02:00:00Z","aqi":26,"aqi_min":8,"aqi_max":46,"pm25":6.23,"pm10":3.64,"stations":116},{"datetime_utc":"2026-06-08T03:00:00Z","aqi":26,"aqi_min":11,"aqi_max":55,"pm25":6.3,"pm10":4.0,"stations":114},{"datetime_utc":"2026-06-08T04:00:00Z","aqi":26,"aqi_min":11,"aqi_max":53,"pm25":6.32,"pm10":5.89,"stations":115},{"datetime_utc":"2026-06-08T05:00:00Z","aqi":27,"aqi_min":13,"aqi_max":57,"pm25":6.53,"pm10":3.94,"stations":117},{"datetime_utc":"2026-06-08T06:00:00Z","aqi":27,"aqi_min":13,"aqi_max":50,"pm25":6.36,"pm10":6.53,"stations":115},{"datetime_utc":"2026-06-08T07:00:00Z","aqi":26,"aqi_min":12,"aqi_max":53,"pm25":6.31,"pm10":6.0,"stations":118},{"datetime_utc":"2026-06-08T08:00:00Z","aqi":26,"aqi_min":1,"aqi_max":46,"pm25":6.19,"pm10":4.51,"stations":117},{"datetime_utc":"2026-06-08T09:00:00Z","aqi":25,"aqi_min":5,"aqi_max":50,"pm25":6.1,"pm10":3.74,"stations":116},{"datetime_utc":"2026-06-08T10:00:00Z","aqi":26,"aqi_min":6,"aqi_max":53,"pm25":6.26,"pm10":3.58,"stations":118},{"datetime_utc":"2026-06-08T11:00:00Z","aqi":26,"aqi_min":6,"aqi_max":74,"pm25":6.2,"pm10":2.74,"stations":119},{"datetime_utc":"2026-06-08T12:00:00Z","aqi":25,"aqi_min":6,"aqi_max":42,"pm25":5.95,"pm10":4.38,"stations":113},{"datetime_utc":"2026-06-08T13:00:00Z","aqi":25,"aqi_min":1,"aqi_max":61,"pm25":6.04,"pm10":2.38,"stations":120},{"datetime_utc":"2026-06-08T14:00:00Z","aqi":25,"aqi_min":3,"aqi_max":57,"pm25":5.94,"pm10":1.73,"stations":118},{"datetime_utc":"2026-06-08T15:00:00Z","aqi":25,"aqi_min":4,"aqi_max":43,"pm25":5.87,"pm10":2.02,"stations":116},{"datetime_utc":"2026-06-08T16:00:00Z","aqi":28,"aqi_min":11,"aqi_max":87,"pm25":6.55,"pm10":null,"stations":116},{"datetime_utc":"2026-06-08T17:00:00Z","aqi":24,"aqi_min":2,"aqi_max":58,"pm25":5.7,"pm10":1.9,"stations":118},{"datetime_utc":"2026-06-08T18:00:00Z","aqi":23,"aqi_min":0,"aqi_max":63,"pm25":5.52,"pm10":1.25,"stations":117},{"datetime_utc":"2026-06-08T19:00:00Z","aqi":24,"aqi_min":12,"aqi_max":75,"pm25":5.7,"pm10":null,"stations":115},{"datetime_utc":"2026-06-08T20:00:00Z","aqi":22,"aqi_min":12,"aqi_max":46,"pm25":5.19,"pm10":null,"stations":115},{"datetime_utc":"2026-06-08T21:00:00Z","aqi":21,"aqi_min":10,"aqi_max":51,"pm25":4.98,"pm10":null,"stations":119},{"datetime_utc":"2026-06-08T22:00:00Z","aqi":20,"aqi_min":12,"aqi_max":43,"pm25":4.73,"pm10":null,"stations":109},{"datetime_utc":"2026-06-08T23:00:00Z","aqi":21,"aqi_min":10,"aqi_max":76,"pm25":4.95,"pm10":4.3,"stations":110},{"datetime_utc":"2026-06-09T00:00:00Z","aqi":22,"aqi_min":12,"aqi_max":79,"pm25":5.22,"pm10":7.25,"stations":114},{"datetime_utc":"2026-06-09T01:00:00Z","aqi":22,"aqi_min":4,"aqi_max":91,"pm25":5.21,"pm10":5.97,"stations":112},{"datetime_utc":"2026-06-09T02:00:00Z","aqi":22,"aqi_min":11,"aqi_max":90,"pm25":5.29,"pm10":3.89,"stations":112},{"datetime_utc":"2026-06-09T03:00:00Z","aqi":23,"aqi_min":4,"aqi_max":97,"pm25":5.5,"pm10":4.1,"stations":119},{"datetime_utc":"2026-06-09T04:00:00Z","aqi":22,"aqi_min":9,"aqi_max":50,"pm25":5.23,"pm10":6.35,"stations":117},{"datetime_utc":"2026-06-09T05:00:00Z","aqi":24,"aqi_min":3,"aqi_max":76,"pm25":5.7,"pm10":4.41,"stations":117},{"datetime_utc":"2026-06-09T06:00:00Z","aqi":23,"aqi_min":3,"aqi_max":55,"pm25":5.47,"pm10":4.2,"stations":115},{"datetime_utc":"2026-06-09T07:00:00Z","aqi":23,"aqi_min":2,"aqi_max":63,"pm25":5.36,"pm10":3.64,"stations":120},{"datetime_utc":"2026-06-09T08:00:00Z","aqi":18,"aqi_min":2,"aqi_max":52,"pm25":4.16,"pm10":null,"stations":117},{"datetime_utc":"2026-06-09T09:00:00Z","aqi":14,"aqi_min":2,"aqi_max":55,"pm25":3.43,"pm10":null,"stations":116},{"datetime_utc":"2026-06-09T10:00:00Z","aqi":12,"aqi_min":4,"aqi_max":53,"pm25":2.93,"pm10":1.33,"stations":110},{"datetime_utc":"2026-06-09T11:00:00Z","aqi":2,"aqi_min":2,"aqi_max":2,"pm25":0.47,"pm10":1.28,"stations":1}],"daily":[{"date":"2026-06-07","aqi_avg":26,"aqi_min":25,"aqi_max":27,"aqi_color":"#059669","aqi_label":"Good","pm25_avg":6.3,"pm10_avg":2.6,"hours":10,"stations_avg":116},{"date":"2026-06-08","aqi_avg":25,"aqi_min":20,"aqi_max":28,"aqi_color":"#059669","aqi_label":"Good","pm25_avg":5.9,"pm10_avg":3.7,"hours":24,"stations_avg":116},{"date":"2026-06-09","aqi_avg":19,"aqi_min":2,"aqi_max":24,"aqi_color":"#059669","aqi_label":"Good","pm25_avg":4.5,"pm10_avg":4.2,"hours":12,"stations_avg":106}]}