全国城市空气质量查询

{
  "showapi_res_code": 0,
  "showapi_res_error": "",
  "showapi_res_id":"ce135f6739294c63be0c021b76b6fbff",
    "showapi_res_body": {
    "ret_code": 0,
    "pm": {
     	"num": "1",  //排名
        "so2": "2",  //
        "o3": "96",  //臭氧1小时平均，μg/m3
        "area_code": "hangzhou",  //
        "pm2_5": "91",  //颗粒物（粒径小于等于2.5μm）1小时平均，μg/m3
        "ct": "2017-05-06 16:19:26.556",  //发布时间
        "primary_pollutant": "颗粒物(PM10)",  //首要污染物
        "co": "0.28",  //一氧化碳1小时平均，mg/m3
        "area": "杭州",  //城市名称
        "no2": "8",  //二氧化氮1小时平均，μg/m3
        "aqi": "500",  //空气质量指数(AQI)，即air quality index，是定量描述空气质量状况的无纲量指数
        "quality": "严重污染",  //空气质量指数类别，有“优、良、轻度污染、中度污染、重度污染、严重污染”6类
        "pm10": "841",  //颗粒物（粒径小于等于10μm）1小时平均，μg/m3
        "o3_8h": "89"  //臭氧8小时滑动平均，μg/m3
    },
    "siteList": [
      {
        "site_name": "万寿西宫",
        "co": "0.2",
        "so2": "2",
        "o3": "112",
        "no2": "8",
        "aqi": "59",
        "quality": "良",
        "pm10": "54",
        "pm2_5": "42",
        "o3_8h": "89",
        "primary_pollutant": "细颗粒物(PM2.5)",
        "ct": "2017-05-06 16:19:40.889"
      },
      {
        "site_name": "定陵",
        "co": "0.2",
        "so2": "2",
        "o3": "116",
        "no2": "2",
        "aqi": "52",
        "quality": "良",
        "pm10": "_",
        "pm2_5": "36",
        "o3_8h": "109",
        "primary_pollutant": "细颗粒物(PM2.5)",
        "ct": "2017-05-06 16:19:40.889"
      } 
    ]
  }
}