Air Pollution API

Air Pollution API concept

Air Pollution API provides current, forecast and historical air pollution data for any coordinates on the globe.

Besides basic Air Quality Index, the API returns data about polluting gases, such as Carbon monoxide (CO), Nitrogen monoxide (NO), Nitrogen dioxide (NO2), Ozone (O3), Sulphur dioxide (SO2), Ammonia (NH3), and particulates (PM2.5 and PM10).

Air pollution forecast is available for 4 days with hourly granularity. Historical data is accessible from 27th November 2020.

Here is a description of OpenWeather scale for Air Quality Index levels:

Qualitative name Index Pollutant concentration in μg/m3
SO2 NO2 PM10 PM2.5 O3 CO
Good 1 [0; 20) [0; 40) [0; 20) [0; 10) [0; 60) [0; 4400)
Fair 2 [20; 80) [40; 70) [20; 50) [10; 25) [60; 100) [4400; 9400)
Moderate 3 [80; 250) [70; 150) [50; 100) [25; 50) [100; 140) [9400-12400)
Poor 4 [250; 350) [150; 200) [100; 200) [50; 75) [140; 180) [12400; 15400)
Very Poor 5 ⩾350 ⩾200 ⩾200 ⩾75 ⩾180 ⩾15400

Other parameters that do not affect the AQI calculation:

  • NH3: min value 0.1 - max value 200
  • NO: min value 0.1 - max value 100

Please find Air Quality Index levels scales used in UK, Europe, USA and Mainland China in the "Air Pollution Index levels scale" page.

Current air pollution data

API call

http://api.openweathermap.org/data/2.5/air_pollution?lat={lat}&lon={lon}&appid={API key}
Parameters
lat required Latitude. If you need the geocoder to automatic convert city names and zip-codes to geo coordinates and the other way around, please use our Geocoding API
lon required Longitude. If you need the geocoder to automatic convert city names and zip-codes to geo coordinates and the other way around, please use our Geocoding API
appid required Your unique API key (you can always find it on your account page under the "API key" tab)

Example of API request

http://api.openweathermap.org/data/2.5/air_pollution?lat=50&lon=50&appid={API key} 
                
{
  "coord": [
    50.0,
    50.0
  ],
  "list": [
    {
      "dt": 1606147200,
      "main": {
        "aqi": 4.0
      },
      "components": {
        "co": 203.609,
        "no": 0.0,
        "no2": 0.396,
        "o3": 75.102,
        "so2": 0.648,
        "pm2_5": 23.253,
        "pm10": 92.214,
        "nh3": 0.117
      }
    }
  ]
}

Forecast air pollution data

API call

http://api.openweathermap.org/data/2.5/air_pollution/forecast?lat={lat}&lon={lon}&appid={API key}
Parameters
lat required Latitude. If you need the geocoder to automatic convert city names and zip-codes to geo coordinates and the other way around, please use our Geocoding API
lon required Longitude. If you need the geocoder to automatic convert city names and zip-codes to geo coordinates and the other way around, please use our Geocoding API
appid required Your unique API key (you can always find it on your account page under the "API key" tab)

Example of API request

http://api.openweathermap.org/data/2.5/air_pollution/forecast?lat=50&lon=50&appid={API key} 
                
{
  "coord": [
    50.0,
    50.0
  ],
  "list": [
    {
      "dt": 1605916800,
      "main": {
        "aqi": 1.0
      },
      "components": {
        "co": 211.954,
        "no": 0.0,
        "no2": 0.217,
        "o3": 72.956,
        "so2": 0.514,
        "pm2_5": 2.563,
        "pm10": 5.757,
        "nh3": 0.216
      }
    },
    {
      "dt": 1605920400,
      "main": {
        "aqi": 1.0
      },
      "components": {
        "co": 211.954,
        "no": 0.0,
        "no2": 0.201,
        "o3": 72.241,
        "so2": 0.469,
        "pm2_5": 2.662,
        "pm10": 5.622,
        "nh3": 0.224
      }
    },
    {
      "dt": 1605924000,
      "main": {
        "aqi": 1.0
      },
      "components": {
        "co": 213.623,
        "no": 0.0,
        "no2": 0.185,
        "o3": 71.526,
        "so2": 0.443,
        "pm2_5": 2.724,
        "pm10": 5.51,
        "nh3": 0.23
      }
    },
    {
      "dt": 1605927600,
      "main": {
        "aqi": 1.0
      },
      "components": {
        "co": 213.623,
        "no": 0.0,
        "no2": 0.17,
        "o3": 72.241,
        "so2": 0.432,
        "pm2_5": 2.812,
        "pm10": 5.687,
        "nh3": 0.234
      }
    },
    .....

Historical air pollution data

API call

http://api.openweathermap.org/data/2.5/air_pollution/history?lat={lat}&lon={lon}&start={start}&end={end}&appid={API key}
Parameters
lat required Latitude. If you need the geocoder to automatic convert city names and zip-codes to geo coordinates and the other way around, please use our Geocoding API
lon required Longitude. If you need the geocoder to automatic convert city names and zip-codes to geo coordinates and the other way around, please use our Geocoding API
start required Start date (unix time, UTC time zone), e.g. start=1606488670
end required End date (unix time, UTC time zone), e.g. end=1606747870
appid required Your unique API key (you can always find it on your account page under the "API key" tab)

Example of API request

http://api.openweathermap.org/data/2.5/air_pollution/history?lat=508&lon=50&start=1606223802&end=1606482999&appid={API key} 
                
{
  "coord": [
    50.0,
    50.0
  ],
  "list": [
    {
      "main": {
        "aqi": 2
      },
      "components": {
        "co": 270.367,
        "no": 5.867,
        "no2": 43.184,
        "o3": 4.783,
        "so2": 14.544,
        "pm2_5": 13.448,
        "pm10": 15.524,
        "nh3": 0.289
      },
      "dt": 1606482000
    },
    {
      "main": {
        "aqi": 2
      },
      "components": {
        "co": 280.38,
        "no": 8.605,
        "no2": 42.155,
        "o3": 2.459,
        "so2": 14.901,
        "pm2_5": 15.103,
        "pm10": 17.249,
        "nh3": 0.162
      },
      "dt": 1606478400
    },
    {
      "main": {
        "aqi": 2
      },
      "components": {
        "co": 293.732,
        "no": 13.523,
        "no2": 41.47,
        "o3": 1.173,
        "so2": 15.14,
        "pm2_5": 17.727,
        "pm10": 19.929,
        "nh3": 0.072
      },
      "dt": 1606474800
    },
    .....

Air Pollution API response

Example of the API response
                   
{
  "coord":[
    50,
    50
  ],
  "list":[
    {
      "dt":1605182400,
      "main":{
        "aqi":1
      },
      "components":{
        "co":201.94053649902344,
        "no":0.01877197064459324,
        "no2":0.7711350917816162,
        "o3":68.66455078125,
        "so2":0.6407499313354492,
        "pm2_5":0.5,
        "pm10":0.540438711643219,
        "nh3":0.12369127571582794
      }
    }
  ]
}

Fields in API response

  • coord Coordinates from the specified location (latitude, longitude)
  • list
    • dt Date and time, Unix, UTC
    • main
      • main.aqi Air Quality Index. Possible values: 1, 2, 3, 4, 5. Where 1 = Good, 2 = Fair, 3 = Moderate, 4 = Poor, 5 = Very Poor. If you want to recalculate Air Quality indexes according UK, Europe, USA and Mainland China scales please use "Air Pollution Index levels scale" page
    • components
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