Estevan Air Quality

Values as of 7/17/2026, 3:00:00 PM (45m 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
10.21 μg/m3 Good
18:00
21:00
24:00
03:00
06:00
09:00
12:00
15:00
12.1
55.5
250.5
27.26
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
40.91 μg/m3 Good
18:00
21:00
24:00
03:00
06:00
09:00
12:00
15:00
55
255
425
49.34
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
15.33 ppb Good
18:00
21:00
24:00
03:00
06:00
09:00
12:00
15:00
55
165
405
23.02
CO (Carbon Monoxide)

CO (Carbon Monoxide)

RangeCategory
0 – 4.4 ppm Good
4.5 – 9.4 ppm Moderate
9.5 – 12.4 ppm Unhealthy for sensitive groups
12.5 – 15.4 ppm Unhealthy
15.5 – 30.4 ppm Very unhealthy
30.5 – 40.4 ppm Hazardous
40.5 – 50.4 ppm Hazardous
> 50.4 ppm Hazardous
0.12 ppm Good
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
0.08 ppb Good
18:00
21:00
24:00
03:00
06:00
09:00
12:00
15:00
36
186
605
0.24
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
6.68 ppb Good
18:00
21:00
24:00
03:00
06:00
09:00
12:00
15:00
54
361
1250
5.84
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
10.21 μg/m3 Good
06:00
09:00
12:00
15:00
12.1
55.5
250.5
16.93
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
40.91 μg/m3 Good
06:00
09:00
12:00
15:00
55
255
425
43.77
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
15.33 ppb Good
06:00
09:00
12:00
15:00
55
165
405
11.14
CO (Carbon Monoxide)

CO (Carbon Monoxide)

RangeCategory
0 – 4.4 ppm Good
4.5 – 9.4 ppm Moderate
9.5 – 12.4 ppm Unhealthy for sensitive groups
12.5 – 15.4 ppm Unhealthy
15.5 – 30.4 ppm Very unhealthy
30.5 – 40.4 ppm Hazardous
40.5 – 50.4 ppm Hazardous
> 50.4 ppm Hazardous
0.12 ppm Good
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
0.08 ppb Good
06:00
09:00
12:00
15:00
36
186
605
0.24
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
6.68 ppb Good
06:00
09:00
12:00
15:00
54
361
1250
5.84
  • 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.