Toggle navigation
Places
CAQI (Europe)
AQC (Australia)
AQHI (Canada)
AQI (China)
AQI (Netherlands)
AQI (US)
CAQI (Europe)
AQI (UK)
AQI (India)
English
Français
Deutsch
日本語
한국어
简体中文
繁體中文
North America
Canada
Québec
Roussillon Regional County Municipality
CAQI (Europe)
AQC (Australia)
AQHI (Canada)
AQI (China)
AQI (Netherlands)
AQI (US)
CAQI (Europe)
AQI (UK)
AQI (India)
Roussillon Regional County Municipality
Québec
2025-04-04 07:00
CAQI (Europe)
Very Low
4
Pollutants
PM2.5
μg/m³
2
Weather
℃
℃
℉
5℃
68%
19 kph
0 of 11
Historical Data
Hourly
Hourly
Daily
CAQI (Europe)
CAQI (Europe)
PM2.5
Places included
Candiac
AQI 3
Châteauguay
AQI 2
Delson
AQI 5
La Prairie
AQI 5
Mercier
AQI 2
Saint-Constant
AQI 3
Saint-Mathieu
AQI 3
Saint-Philippe
AQI 5
Sainte-Catherine
AQI 5
Data Sources
http://www.airnow.gov/
Get the App
Scan QR Code
Air Matters
Realtime broadcasting air quality information on your phone for more than 180 countries.
iPhone, iPad
Android
Scan QR Code to Download App
iOS
Google Play
Download APK
AQI
AQI
O3
PM10
PM2.5
SO2
NO2
CO
Allergy Risk
Birch
Alder
Grasses
Ragweed
Mugwort
Olive Tree
20
53
29
9
17
24
21
14
3
19
13
9
19
30
21
17
13
33
31
18
17
156
8
15
13
21
7
12
17
26
17
12
17
25
28
17
29
18
17
27
52
10
47
13
28
27
7
20
21
30
12
16
15
18
17
20
26
13
25
19
15
12
13
30
38
22
20
5
24
6
37
17
24
14
17
28
20
17
20
30
6
+
−
Leaflet
| ©
OpenStreetMap
contributors
Cities Nearby
Saint-Constant
AQI 3
Sainte-Catherine
AQI 5
Delson
AQI 5
Candiac
AQI 3
Châteauguay
AQI 2
Montreal West
AQI 4
Mercier
AQI 2
Côte Saint-Luc
AQI 4
Saint-Philippe
AQI 5
Saint-Rémi
AQI 2
La Prairie
AQI 5
Air Matters © 2025