Air quality indicators
Air quality index values for zones monitored over the month of :
January 2024
The index corresponds to the average concentration of particle matter measured in micrograms per m3;
the lower the value, the better the air quality.
The average environment of the Toulouse region
PM 10
Toulouse Inside Peripheral Ring
Good
Toulouse Suburd
Good
Castanet-Tolosan
Good
PM 2.5
Toulouse Inside Peripheral Ring
Average
Toulouse Suburd
Good
Castanet-Tolosan
Good
Environmental quality averaged over the period under review is good. The higher PM10 values around Toulouse than in the city itself are partly due to the effects of chimney fires (wood heating), which are more numerous in rural areas with individual dwellings than in large housing estates, and also probably to the numerous fogs outside the city at this time of year, which can have an impact on the measurements from the citizens’ sensors despite a correction being applied.
The average values presented take into account the measurements from the citizens’ sensors and those from the official Atmo Occitanie sensors.
Detailed environment of the Toulouse region
- Average PM 10 measurements (readings in micrograms / m3)
The centre of Toulouse gives average PM10 values of between 13 and 17, confirmed by measurements from official sensors (in a blue circle) outside the main traffic arteries.
Measurements on the Toulouse ring road, taken solely by official sensors, show higher levels of between 18 and 36. The highest measurement rate (36) corresponds to the busiest point on the ring road at Rangueil.
The measurement points near the airport (Blagnac) show moderate readings (16 to 17).
Readings to the west of Toulouse show higher values, corresponding to high-density residential areas.
The northern and eastern parts of Toulouse, where there are no sensors, cannot be properly assessed.
Special focus on Castanet-Tolosan
- Average PM 10 measurements
- Average PM 2.5 measurements (readings in micrograms / m3)
Citizen sensors make it possible to assess PM10 and PM2.5 concentrations at the same time, which is not the case for all official sensors. Concentrations are higher on the ring road, but generally speaking the measurements are more homogeneous across the whole area surveyed.
Toulouse southern ring road at Rangueil
- Average PM 2.5 measurements
Temperature trend over the present month
PM10 concentrations over the present month
