Worst air pollution São Cristóvão, today and tomorrow
Today (16 July): Air quality in São Cristóvão is fair. AQI, PM2.5, and O3 are fair; PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (PM2.5: 25.7/100).
Tomorrow (17 July 2026): Air quality in São Cristóvão is fair. All pollutants stay as today. Pollution peaks around 11:00 PM (PM2.5: 28.0/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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São Cristóvão's air quality reflects the greater Aracaju metropolitan area in Sergipe, with vehicle emissions from the BR-101 and surrounding mixed industrial, historical, and residential character contributing local sources in this UNESCO heritage city. Atlantic trade winds from the Sergipe coast provide background maritime ventilation, while the growing metropolitan expansion drives increasing vehicle emissions throughout the year.
Today - 16 July | Pollution peaks at 23:00
AQI:
Fair
25.7/100
PM2.5 (fine particles):
Fair
25.7/100
PM10 (coarse particles):
Good
11.0/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Fair
23.9/100
SO2 (sulfur dioxide):
Good
2.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.5/100
PM1 (ultrafine particles):
Good
10.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 23:00
AQI:
Fair
28.0/100
PM2.5 (fine particles):
Fair
28.0/100
PM10 (coarse particles):
Good
11.3/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Fair
26.0/100
SO2 (sulfur dioxide):
Good
2.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.6/100
PM1 (ultrafine particles):
Good
17.1/100
Pollen forecast in São Cristóvão
View pollen forecastFrequently Asked Questions
Is air quality bad in São Cristóvão right now?
On 16 July 2026, overall air quality in São Cristóvão is fair. AQI is the main air quality indicator at 25.7/100. Pollution peaks around 11:00 PM (PM2.5: 25.7/100).
Will air quality be worse tomorrow in São Cristóvão?
On 17 July 2026, air quality conditions in São Cristóvão will be similar to today, with AQI forecast at fair at 28.0/100. Pollution peaks around 11:00 PM (PM2.5: 28.0/100).
When is air pollution at its worst in São Cristóvão?
In São Cristóvão, reduced air quality is most noticeable when native Atlantic Forest remnants and introduced urban trees pollen peaks, and on days affected by vehicle emissions from the BR-101 and surrounding mixed industrial, historical, and residential character; things typically settle down again once the weather pattern shifts.
Are air quality levels in São Cristóvão based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app