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Through its developer business, the company provides global weather data and forecasting services via fast, reliable APIs, delivering historical, current, and forecast weather data for any location worldwide. Combining advanced meteorology, AI-enhanced forecasting models, and scalable data infrastructure, OpenWeather helps customers integrate weather intelligence into applications, services, and operational workflows. Supplier of Achilles UVDB community © 2012 - 2026 OpenWeather ® All rights reserved Terms & conditions of sale Website terms & conditions Privacy policy Documentation One Call API Current & Forecast Solar Irradiance Historical Maps Environmental Other Environmental Air Pollution APIAir Pollution API concept Current air pollution data Forecast air pollution data Historical air pollution data Air Pollution API responseExample of the API response Fields in API response Air Pollution Index levels scaleOverview Air quality index levels scale in UK Air quality index levels scale in Europe Air quality index levels scale in USA Air quality index levels scale in Mainland China Fire Weather Index APIFire Weather Index API conceptFire Weather Index range values How to get access to Fire Weather Index data Call Current Fire Weather Index dataHow to make an API call Example of API response Fields in API response Call Forecast Fire Weather Index dataHow to make an API call Example of API response Fields in API response API errors Fire Weather Index mapFire Weather Index map conceptFire Weather Index range values URL format and parameters How to get Current and Forecast Fire Weather Index maps using only 'date' parameter? Example of Fire Weather Index maps Fire Weather Index map default palette Libraries to connect weather layers 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 { "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 { "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 { "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 components.co Сoncentration of CO (Carbon monoxide), μg/m3 components.no Сoncentration of NO (Nitrogen monoxide), μg/m3 components.no2 Сoncentration of NO2 (Nitrogen dioxide), μg/m3 components.o3 Сoncentration of O3 (Ozone), μg/m3 components.so2 Сoncentration of SO2 (Sulphur dioxide), μg/m3 components.pm2_5 Сoncentration of PM2.5 (Fine particles matter), μg/m3 components.pm10 Сoncentration of PM10 (Coarse particulate matter), μg/m3 components.nh3 Сoncentration of NH3 (Ammonia), μg/m3