SmogRank / Data sources
Data sources and credits
Monitor readings are published by the providers below and collected by OpenAQ, whose API we use. Rankings, daily values and patterns are our own work derived from them. City names, locations and time zones: GeoNames (CC BY 4.0). Health categories: US EPA; guidelines: WHO Air Quality Guidelines 2021.
Monitor providers
| Provider | Licence | Monitors | Countries |
|---|---|---|---|
| EEA | ODC-BY | 1,664 | AD AL AT BA BE BG CH CZ DE EE ES FI FR GF GI GP GR HR HU IE IS IT LT LU LV MA MC ME MF MK MQ MT NL NO PL PT RE RO RS SE SI SK VA |
| Ministry of the Environment Air Pollutant Wide Area Monitoring System | 政府標準利用規約（第2.0版） (Government Standard Terms of Use v2.0) | 1,045 | JP |
| AirNow | US Public Domain | 1,037 | AZ BA CA ET IN MX MZ PR TJ US |
| AirGradient | CC BY 4.0 | 1,025 | AE AM AU BD BE BG BT CA CD CH CM CN CZ DE DK FK GB GH GM HN HR HU ID IN KH KZ LA LB LR MT MW MY NG NL NP NZ PH PK PT PY RO SG SN TH UG US ZA ZW |
| Clarity | CC0 1.0 | 503 | AM AU CI CM GB GH JE KG PH SG SL US |
| Sinaica Mexico | Mexico SINAICA Terms and Conditions | 104 | MX US |
| Hawanama | CC BY 4.0 | 104 | PK |
| AirQo | CC BY 4.0 | 58 | CM NG UG ZM |
| senstate | CC BY 4.0 | 51 | BG |
| London Air Quality Network | UK OGL "Open Government License" | 41 | GB |
| Catalonia Medi Ambient I Sostenibilitat | CC0 1.0 | 25 | ES |
| IQAir | CC BY 4.0 | 14 | GM NG ZW |
| airqoon | CC BY 4.0 | 7 | TR |
| Environment Canterbury | CC BY 4.0 | 6 | NZ |
| Slovenian Environment Agency | CC BY 4.0 | 2 | SI |
| Miri Africa | CC BY 4.0 | 2 | NG |