Air Pollution in St Laurent: Real-time Air Quality Index and smog alert.

The latest data Last 7 days St Laurent pollution March 2016 - May 2020
Current data from stations: Duncan
Locations: « Mont-Royal St Laurent
Pollution and air quality forecast for St Laurent. Today is Friday, May 2, 2025. The following air pollution values have been recorded for St Laurent:
  1. ozone (O3) - 0 (Good)
  2. carbon monoxide (CO) - 0 (Good)
  3. particulate matter (PM2.5) dust - 6 (Good)
  4. nitrogen dioxide (NO2) - 0 (Good)
Real-time Air Quality Index (AQI) for St Laurent, Tuesday, April 16, 2024: 1.

air quality index: 0
AQI 1 Good

What is the air quality in St Laurent today? Is the air polluted in St Laurent?. Is there smog?

Today (Tuesday, April 16, 2024) air quality is good. The air quality has no effect on health. Everyone can continue their outdoor activities normally in St Laurent.


How is the O3 level today in St Laurent? (ozone (O3))
0 (Good)

How high is the CO level? (carbon monoxide (CO))
0 (Good)

What is the current level of PM2.5 in St Laurent? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 6 (Good) For comparison, the highest level of PM2.5 in St Laurent in the last 7 days was: 9 (Tuesday, April 9, 2024) and the lowest: 2 (Friday, April 12, 2024). The highest PM2.5 values were recorded: 15 (February 2020). The lowest level of particulate matter PM2.5 pollution occurs in month: May (5.2).

How high is the level of NO2? (nitrogen dioxide (NO2))
0 (Good)



Current data Tuesday, April 16, 2024, 11:00 AM

O3 0 (Good)

CO 0 (Good)

PM2,5 6 (Good)

NO2 0 (Good)

Data on air pollution from recent days in St Laurent

index 2024-04-09 2024-04-10 2024-04-11 2024-04-12 2024-04-13 2024-04-14 2024-04-15 2024-04-16
no2 0
Good		 0
Good		 0
Good		 0
Good		 0
Good		 0
Good		 0
Good		 0
Good
co 0
Good		 0
Good		 0
Good		 0
Good		 0
Good		 0
Good		 0
Good		 0
Good
pm25 9
Good		 7
Good		 8
Good		 2
Good		 2
Good		 3
Good		 7
Good		 4
Good
o3 0
Good		 0
Good		 0
Good		 0
Good		 0
Good		 0
Good		 0
Good		 0
Good
data source »
Air pollution in St Laurent from March 2016 to May 2020
pollution pm25 hikersbay.com
index 2020-05 2020-04 2020-03 2020-02 2020-01 2019-12 2019-11 2019-10 2019-09 2019-08 2019-07 2019-06 2019-05 2019-04 2019-03 2019-02 2019-01 2018-12 2018-11 2016-05 2016-04 2016-03
co:ppm 0.18 (Good) 0.18 (Good) 0.23 (Good) 0.3 (Good) 0.3 (Good) 0.25 (Good) 0.25 (Good) 0.26 (Good) 0.25 (Good) 0.23 (Good) 0.25 (Good) 0.23 (Good) 0.21 (Good) 0.22 (Good) 0.27 (Good) 0.27 (Good) 0.27 (Good) 0.29 (Good) 0.26 (Good) - (Good) - (Good) - (Good)
no2:ppm 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.02 (Good) 0.02 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.01 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) - (Good) - (Good) - (Good)
o3:ppm 0.03 (Good) 0.03 (Good) 0.03 (Good) 0.02 (Good) 0.01 (Good) 0.02 (Good) 0.02 (Good) 0.01 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.02 (Good) 0.03 (Good) 0.03 (Good) 0.02 (Good) 0.02 (Good) 0.01 (Good) 0.01 (Good) 0.02 (Good) 0.03 (Good) 0.02 (Good)
pm25 5.2 (Good) 6.8 (Good) 9.1 (Good) 15 (Moderate) 11 (Good) 9.7 (Good) 8.7 (Good) 8.2 (Good) 7.5 (Good) 8.2 (Good) 12 (Good) 9.4 (Good) 7 (Good) 6.9 (Good) 12 (Good) 11 (Good) 12 (Good) 12 (Good) 9.5 (Good) - (Good) - (Good) - (Good)
data source »

Duncan

Tuesday, April 16, 2024, 11:00 AM

O3 0.02 (Good)

ozone (O3)

CO 0.2 (Good)

carbon monoxide (CO)

PM2,5 6.3 (Good)

particulate matter (PM2.5) dust

NO2 0.02 (Good)

nitrogen dioxide (NO2)

Duncan

index 2024-04-16 2024-04-15 2024-04-14 2024-04-13 2024-04-12 2024-04-11 2024-04-10 2024-04-09
no2 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.02
co 0.2 0.25 0.2 0.22 0.23 0.24 0.24 0.33
pm25 4.5 7 2.7 1.8 2.5 7.7 7.2 9.1
o3 0.02 0.02 0.03 0.03 0.03 0.03 0.03 0.02

Duncan

2016-03   2020-05
pollution pm25 hikersbay.com
index 2020-05 2020-04 2020-03 2020-02 2020-01 2019-12 2019-11 2019-10 2019-09 2019-08 2019-07 2019-06 2019-05 2019-04 2019-03 2019-02 2019-01 2018-12 2018-11 2016-05 2016-04 2016-03
o3:ppm 0.03 0.03 0.03 0.02 0.01 0.02 0.02 0.01 0.02 0.02 0.02 0.02 0.02 0.03 0.03 0.02 0.02 0.01 0.01 0.02 0.03 0.02
co:ppm 0.18 0.18 0.23 0.3 0.3 0.25 0.25 0.26 0.25 0.23 0.25 0.23 0.21 0.22 0.27 0.27 0.27 0.29 0.26 - - -
no2:ppm 0.01 0.01 0.01 0.02 0.02 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.02 0.02 0.02 0.02 0.02 - - -
pm25 5.2 6.8 9.1 15 11 9.7 8.7 8.2 7.5 8.2 12 9.4 7 6.9 12 11 12 12 9.5 - - -

* Pollution data source: https://openaq.org (AirNow) The data is licensed under CC-By 4.0