Estevan Air Quality

Values as of 4/11/2026, 3:00:00 AM (1h 43m ago)

PollutantValueCategory
PM2.5 (Particulates)

PM2.5 (Particulates)

RangeCategory
0 – 12 μg/m3 Good
12.1 – 35.4 μg/m3 Moderate
35.5 – 55.4 μg/m3 Unhealthy for sensitive groups
55.5 – 150.4 μg/m3 Unhealthy
150.5 – 250.4 μg/m3 Very unhealthy
250.5 – 350.4 μg/m3 Hazardous
350.5 – 500.4 μg/m3 Hazardous
> 500.4 μg/m3 Hazardous
4.50 μg/m3 Good
06:00
09:00
12:00
15:00
18:00
21:00
24:00
03:00
12.1
55.5
250.5
12.13
PM10 (Particulates)

PM10 (Particulates)

RangeCategory
0 – 54 μg/m3 Good
55 – 154 μg/m3 Moderate
155 – 254 μg/m3 Unhealthy for sensitive groups
255 – 354 μg/m3 Unhealthy
355 – 424 μg/m3 Very unhealthy
425 – 504 μg/m3 Hazardous
505 – 604 μg/m3 Hazardous
> 604 μg/m3 Hazardous
23.72 μg/m3 Good
06:00
09:00
12:00
15:00
18:00
21:00
24:00
03:00
55
255
425
49.31
O3 (Ozone) *

O3 (Ozone) *

RangeCategory
0 – 54 ppb Good
55 – 70 ppb Moderate
71 – 164 ppb Unhealthy for sensitive groups
165 – 204 ppb Unhealthy
205 – 404 ppb Very unhealthy
405 – 504 ppb Hazardous
505 – 604 ppb Hazardous
> 604 ppb Hazardous
37.37 ppb Good
06:00
09:00
12:00
15:00
18:00
21:00
24:00
03:00
55
165
405
44.98
SO2 (Sulfur Dioxide)

SO2 (Sulfur Dioxide)

RangeCategory
0 – 35 ppb Good
36 – 75 ppb Moderate
76 – 185 ppb Unhealthy for sensitive groups
186 – 304 ppb Unhealthy
305 – 604 ppb Very unhealthy
605 – 804 ppb Hazardous
805 – 1004 ppb Hazardous
> 1004 ppb Hazardous
0.56 ppb Good
06:00
09:00
12:00
15:00
18:00
21:00
24:00
03:00
36
186
605
12.80
NO2 (Nitrogen Dioxide)

NO2 (Nitrogen Dioxide)

RangeCategory
0 – 53 ppb Good
54 – 100 ppb Moderate
101 – 360 ppb Unhealthy for sensitive groups
361 – 649 ppb Unhealthy
650 – 1249 ppb Very unhealthy
1250 – 1649 ppb Hazardous
1650 – 2049 ppb Hazardous
> 2049 ppb Hazardous
4.28 ppb Good
06:00
09:00
12:00
15:00
18:00
21:00
24:00
03:00
54
361
1250
18.52
PM2.5 (Particulates)

PM2.5 (Particulates)

RangeCategory
0 – 12 μg/m3 Good
12.1 – 35.4 μg/m3 Moderate
35.5 – 55.4 μg/m3 Unhealthy for sensitive groups
55.5 – 150.4 μg/m3 Unhealthy
150.5 – 250.4 μg/m3 Very unhealthy
250.5 – 350.4 μg/m3 Hazardous
350.5 – 500.4 μg/m3 Hazardous
> 500.4 μg/m3 Hazardous
4.50 μg/m3 Good
18:00
21:00
24:00
03:00
12.1
55.5
250.5
10.20
PM10 (Particulates)

PM10 (Particulates)

RangeCategory
0 – 54 μg/m3 Good
55 – 154 μg/m3 Moderate
155 – 254 μg/m3 Unhealthy for sensitive groups
255 – 354 μg/m3 Unhealthy
355 – 424 μg/m3 Very unhealthy
425 – 504 μg/m3 Hazardous
505 – 604 μg/m3 Hazardous
> 604 μg/m3 Hazardous
23.72 μg/m3 Good
18:00
21:00
24:00
03:00
55
255
425
40.70
O3 (Ozone) *

O3 (Ozone) *

RangeCategory
0 – 54 ppb Good
55 – 70 ppb Moderate
71 – 164 ppb Unhealthy for sensitive groups
165 – 204 ppb Unhealthy
205 – 404 ppb Very unhealthy
405 – 504 ppb Hazardous
505 – 604 ppb Hazardous
> 604 ppb Hazardous
37.37 ppb Good
18:00
21:00
24:00
03:00
55
165
405
44.98
SO2 (Sulfur Dioxide)

SO2 (Sulfur Dioxide)

RangeCategory
0 – 35 ppb Good
36 – 75 ppb Moderate
76 – 185 ppb Unhealthy for sensitive groups
186 – 304 ppb Unhealthy
305 – 604 ppb Very unhealthy
605 – 804 ppb Hazardous
805 – 1004 ppb Hazardous
> 1004 ppb Hazardous
0.56 ppb Good
18:00
21:00
24:00
03:00
36
186
605
12.80
NO2 (Nitrogen Dioxide)

NO2 (Nitrogen Dioxide)

RangeCategory
0 – 53 ppb Good
54 – 100 ppb Moderate
101 – 360 ppb Unhealthy for sensitive groups
361 – 649 ppb Unhealthy
650 – 1249 ppb Very unhealthy
1250 – 1649 ppb Hazardous
1650 – 2049 ppb Hazardous
> 2049 ppb Hazardous
4.28 ppb Good
18:00
21:00
24:00
03:00
54
361
1250
10.81
  • Contains information licensed under the Government of Saskatchewan Standard Unrestricted Use Data Licence (Version 2.0).
  • Individual pollutant gauges are based roughly on the EPA's table of AQI breakpoints. https://en.wikipedia.org/wiki/Air_quality_index#Computing_the_AQI
  • Data is typically updated about once per hour.