Data about the daily mean concentration of air pollutants, especially those potentially harmful to human health. Data should be available for all air monitoring stations or air monitoring zones in a city.
| Question | Answer | Comment |
|---|---|---|
| Available in bulk | No | The dataset is downloadable through Qualar system, but you have to choose some extractions (station and pollutant). So, not available in bulk. |
| In an open format | CSV | you can only get this format through the Qualar system. |
| Available free of charge | Yes | |
| Up-to-date | Yes | Data is updated hourly. |
| Available free online | No | Downloadable data is only available after registering in a system called “Qualar”. You can view data without registering, though, but you are not able to download it. |
| Openly licenced | No | I didn’t find any license or statement, terms and conditions, nothing in the website. And I had to register to download data. |
| findable | 4 | It was quite easy to find the data, even for someone not acquainted with the topic. I just had to type “air quality data são paulo” in google and then navigate through the website. |
| findable_steps | 1) I first tried to find something at the São Paulo open data portal but couldn’t find information on air quality, 2) Then I looked at google for "Air Quality Data São Paulo”, 3) I found the link for CETESB webpage and navigated through to find the information. | |
| Collected by government | Yes | |
| usability | 2 | Some effort is necessary to understand the specifics of this kind of data and to create a full databank with all the information, since you can only download parts of the data, not all of it at once. At least there is a machine readable format in this case. |
| collector_name | CETESB - Companhia Ambiental do Estado de São Paulo | Data is provided by a state government agency in São Paulo whose name, roughly translated is “São Paulo State Environmental Company”. |
| online_otherwise | Yes | |
| characteristics | Particulate matter (PM), Sulphur oxides (SOx), Nitrogen oxides (NOx), Carbon monoxide (CO), Ozone, Available per air monitoring station/zone | Data was available for all the pollutants required except VOCs, per air monitoring station. There are twenty-six in the São Paulo Metropolitan Region. Data on particulate matter are provided under two designations: inhalable particles and small/fine inhalable particles. |
| location | https://ar.cetesb.sp.gov.br/ - The link goes to the “air quality” webpage of CETESB. At the blue header, at the “air quality” option, you have many different options to access the data., https://sistemasinter.cetesb.sp.gov.br/Ar/php/boletim_po - This link shows the latest available data per station and per pollutant., https://sistemasinter.cetesb.sp.gov.br/Ar/php/mapa_quali - This link shows a map of São Paulo’s city metropolitan region with the situation of each station., https://sistemasinter.cetesb.sp.gov.br/Ar/php/ar_dados_h - This link provides hourly data per station in tables., https://qualar.cetesb.sp.gov.br/qualar/home.do - This link is a system provided by CETESB that permits downloading data per station in .csv. | They are all web-based reports except the last one that has a function “export data”. |
Reviewed. Everything ok.