Crofton Substation, North Cowichan, British Columbia, Canada Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+
August Air Quality Analysis
Crofton Substation, North Cowichan, British Columbia, Canada
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
14th Aug 2021
76AQILowest AQI recorded on
9th Aug 2023
4AQISame Day Analysis (3rd August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 24 of Good air quality, showing improvement over 2024 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 3rd Aug - 4th Aug 2025
Crofton Substation, North Cowichan, British Columbia, Canada
AQI
Day
Night
.
5 AM3rd Aug 2025
9 PM
4 AM4th Aug 2025
Day time
Avg. Highest Time
8PM3rd Aug
39AQI
Avg. Lowest Time
9AM3rd Aug
19AQI
Night time
Avg. Highest Time
2AM4th Aug
40AQI
Avg. Lowest Time
9PM3rd Aug
22AQI
In the last 24 hours,
Crofton Substation's AQI reached its highest point of 40 at 2 AM during the Night, while the lowest point, 19, was recorded at 9 AM during the Day between 3rd Aug and 4th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Crofton Substation, North Cowichan, British Columbia, Canada
JulAug
05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th
Day
Night
5th Jul 2025245 AMAQI
5th Jul 2025226 AMAQI
5th Jul 2025227 AMAQI
5th Jul 2025228 AMAQI
5th Jul 2025209 AMAQI
5th Jul 20252210 AMAQI
5th Jul 20251911 AMAQI
5th Jul 20251812 PMAQI
5th Jul 2025181 PMAQI
5th Jul 2025182 PMAQI
5th Jul 2025183 PMAQI
5th Jul 2025184 PMAQI
5th Jul 2025215 PMAQI
5th Jul 2025206 PMAQI
5th Jul 2025207 PMAQI
5th Jul 2025188 PMAQI
5th Jul 2025199 PMAQI
5th Jul 20251910 PMAQI
5th Jul 20251811 PMAQI
6th Jul 20251812 AMAQI
6th Jul 2025201 AMAQI
6th Jul 2025182 AMAQI
6th Jul 2025183 AMAQI
6th Jul 2025204 AMAQI
16°C13/19°C
6th Jul 2025205 AMAQI
6th Jul 2025186 AMAQI
6th Jul 2025167 AMAQI
6th Jul 2025208 AMAQI
6th Jul 2025219 AMAQI
6th Jul 20252010 AMAQI
6th Jul 20252111 AMAQI
6th Jul 20252112 PMAQI
6th Jul 2025201 PMAQI
6th Jul 2025222 PMAQI
6th Jul 2025243 PMAQI
6th Jul 2025234 PMAQI
6th Jul 2025225 PMAQI
6th Jul 2025226 PMAQI
6th Jul 2025217 PMAQI
6th Jul 2025228 PMAQI
6th Jul 2025219 PMAQI
6th Jul 20252210 PMAQI
6th Jul 20252011 PMAQI
7th Jul 20252112 AMAQI
7th Jul 2025201 AMAQI
7th Jul 2025212 AMAQI
7th Jul 2025213 AMAQI
7th Jul 2025214 AMAQI
19°C15/22°C
7th Jul 2025225 AMAQI
7th Jul 2025216 AMAQI
7th Jul 2025227 AMAQI
7th Jul 2025228 AMAQI
7th Jul 2025229 AMAQI
7th Jul 20252310 AMAQI
7th Jul 20252111 AMAQI
7th Jul 20252912 PMAQI
7th Jul 2025261 PMAQI
7th Jul 2025242 PMAQI
7th Jul 2025243 PMAQI
7th Jul 2025244 PMAQI
7th Jul 2025235 PMAQI
7th Jul 2025246 PMAQI
7th Jul 2025247 PMAQI
7th Jul 2025238 PMAQI
7th Jul 2025239 PMAQI
7th Jul 20252410 PMAQI
7th Jul 20252211 PMAQI
8th Jul 20252112 AMAQI
8th Jul 2025231 AMAQI
8th Jul 2025222 AMAQI
8th Jul 2025243 AMAQI
8th Jul 2025254 AMAQI
21°C17/24°C
8th Jul 2025245 AMAQI
8th Jul 2025236 AMAQI
8th Jul 2025247 AMAQI
8th Jul 2025218 AMAQI
8th Jul 2025189 AMAQI
8th Jul 20251810 AMAQI
8th Jul 20251911 AMAQI
8th Jul 20252012 PMAQI
8th Jul 2025221 PMAQI
8th Jul 2025212 PMAQI
8th Jul 2025183 PMAQI
8th Jul 2025184 PMAQI
8th Jul 2025195 PMAQI
8th Jul 2025196 PMAQI
8th Jul 2025197 PMAQI
8th Jul 2025208 PMAQI
8th Jul 2025199 PMAQI
8th Jul 20252010 PMAQI
8th Jul 20251911 PMAQI
9th Jul 20251912 AMAQI
9th Jul 2025201 AMAQI
9th Jul 2025182 AMAQI
9th Jul 2025163 AMAQI
9th Jul 2025154 AMAQI
19°C17/23°C
9th Jul 2025165 AMAQI
9th Jul 2025146 AMAQI
9th Jul 2025147 AMAQI
9th Jul 2025148 AMAQI
9th Jul 2025169 AMAQI
9th Jul 20251410 AMAQI
9th Jul 20251611 AMAQI
9th Jul 20251412 PMAQI
9th Jul 2025141 PMAQI
9th Jul 2025142 PMAQI
9th Jul 2025143 PMAQI
9th Jul 2025144 PMAQI
9th Jul 2025145 PMAQI
9th Jul 2025166 PMAQI
9th Jul 2025167 PMAQI
9th Jul 2025168 PMAQI
9th Jul 2025169 PMAQI
9th Jul 20251610 PMAQI
9th Jul 20251711 PMAQI
10th Jul 20251812 AMAQI
10th Jul 2025161 AMAQI
10th Jul 2025172 AMAQI
10th Jul 2025163 AMAQI
10th Jul 2025184 AMAQI
18°C16/20°C
10th Jul 2025185 AMAQI
10th Jul 2025166 AMAQI
10th Jul 2025187 AMAQI
10th Jul 2025178 AMAQI
10th Jul 2025159 AMAQI
10th Jul 20251610 AMAQI
10th Jul 20251411 AMAQI
10th Jul 20251612 PMAQI
10th Jul 2025191 PMAQI
10th Jul 2025192 PMAQI
10th Jul 2025183 PMAQI
10th Jul 2025194 PMAQI
10th Jul 2025185 PMAQI
10th Jul 2025186 PMAQI
10th Jul 2025187 PMAQI
10th Jul 2025198 PMAQI
10th Jul 2025189 PMAQI
10th Jul 20251910 PMAQI
10th Jul 20251911 PMAQI
11th Jul 20251812 AMAQI
11th Jul 2025181 AMAQI
11th Jul 2025192 AMAQI
11th Jul 2025203 AMAQI
11th Jul 2025224 AMAQI
17°C15/20°C
11th Jul 2025235 AMAQI
11th Jul 2025206 AMAQI
11th Jul 2025217 AMAQI
11th Jul 2025238 AMAQI
11th Jul 2025219 AMAQI
11th Jul 20252010 AMAQI
11th Jul 20251811 AMAQI
11th Jul 20251812 PMAQI
11th Jul 2025201 PMAQI
11th Jul 2025202 PMAQI
11th Jul 2025233 PMAQI
11th Jul 2025224 PMAQI
11th Jul 2025225 PMAQI
11th Jul 2025226 PMAQI
11th Jul 2025227 PMAQI
11th Jul 2025218 PMAQI
11th Jul 2025209 PMAQI
11th Jul 20252210 PMAQI
11th Jul 20252011 PMAQI
12th Jul 20252112 AMAQI
12th Jul 2025201 AMAQI
12th Jul 2025202 AMAQI
12th Jul 2025233 AMAQI
12th Jul 2025194 AMAQI
20°C16/23°C
12th Jul 2025225 AMAQI
12th Jul 2025186 AMAQI
12th Jul 2025197 AMAQI
12th Jul 2025188 AMAQI
12th Jul 2025189 AMAQI
12th Jul 20251810 AMAQI
12th Jul 20251811 AMAQI
12th Jul 20251812 PMAQI
12th Jul 2025171 PMAQI
12th Jul 2025182 PMAQI
12th Jul 2025183 PMAQI
12th Jul 2025174 PMAQI
12th Jul 2025195 PMAQI
12th Jul 2025206 PMAQI
12th Jul 2025197 PMAQI
12th Jul 2025198 PMAQI
12th Jul 2025199 PMAQI
12th Jul 20251910 PMAQI
12th Jul 20252011 PMAQI
13th Jul 20252012 AMAQI
13th Jul 2025221 AMAQI
13th Jul 2025212 AMAQI
13th Jul 2025213 AMAQI
13th Jul 2025234 AMAQI
21°C18/25°C
13th Jul 2025235 AMAQI
13th Jul 2025216 AMAQI
13th Jul 2025227 AMAQI
13th Jul 2025238 AMAQI
13th Jul 2025269 AMAQI
13th Jul 20252310 AMAQI
13th Jul 20252211 AMAQI
13th Jul 20252512 PMAQI
13th Jul 2025251 PMAQI
13th Jul 2025242 PMAQI
13th Jul 2025223 PMAQI
13th Jul 2025214 PMAQI
13th Jul 2025205 PMAQI
13th Jul 2025226 PMAQI
13th Jul 2025217 PMAQI
13th Jul 2025198 PMAQI
13th Jul 2025219 PMAQI
13th Jul 20252310 PMAQI
13th Jul 20252011 PMAQI
14th Jul 20252112 AMAQI
14th Jul 2025211 AMAQI
14th Jul 2025212 AMAQI
14th Jul 2025203 AMAQI
14th Jul 2025214 AMAQI
23°C20/28°C
14th Jul 2025205 AMAQI
14th Jul 2025186 AMAQI
14th Jul 2025187 AMAQI
14th Jul 2025228 AMAQI
14th Jul 2025189 AMAQI
14th Jul 20251610 AMAQI
14th Jul 20251611 AMAQI
14th Jul 20251712 PMAQI
14th Jul 2025171 PMAQI
14th Jul 2025182 PMAQI
14th Jul 2025183 PMAQI
14th Jul 2025184 PMAQI
14th Jul 2025195 PMAQI
14th Jul 2025196 PMAQI
14th Jul 2025187 PMAQI
14th Jul 2025188 PMAQI
14th Jul 2025189 PMAQI
14th Jul 20252010 PMAQI
14th Jul 20251911 PMAQI
15th Jul 20252012 AMAQI
15th Jul 2025191 AMAQI
15th Jul 2025212 AMAQI
15th Jul 2025223 AMAQI
15th Jul 2025224 AMAQI
21°C17/24°C
15th Jul 2025225 AMAQI
15th Jul 2025256 AMAQI
15th Jul 2025247 AMAQI
15th Jul 2025238 AMAQI
15th Jul 2025219 AMAQI
15th Jul 20251810 AMAQI
15th Jul 20251911 AMAQI
15th Jul 20252212 PMAQI
15th Jul 2025221 PMAQI
15th Jul 2025262 PMAQI
15th Jul 2025253 PMAQI
15th Jul 2025254 PMAQI
15th Jul 2025255 PMAQI
15th Jul 2025286 PMAQI
15th Jul 2025277 PMAQI
15th Jul 2025268 PMAQI
15th Jul 2025249 PMAQI
15th Jul 20252410 PMAQI
15th Jul 20252611 PMAQI
16th Jul 20252912 AMAQI
16th Jul 2025271 AMAQI
16th Jul 2025272 AMAQI
16th Jul 2025273 AMAQI
16th Jul 2025314 AMAQI
23°C18/28°C
16th Jul 2025355 AMAQI
16th Jul 2025346 AMAQI
16th Jul 2025307 AMAQI
16th Jul 2025288 AMAQI
16th Jul 2025269 AMAQI
16th Jul 20253210 AMAQI
16th Jul 20253411 AMAQI
16th Jul 20253312 PMAQI
16th Jul 2025401 PMAQI
16th Jul 2025372 PMAQI
16th Jul 2025413 PMAQI
16th Jul 2025424 PMAQI
16th Jul 2025445 PMAQI
16th Jul 2025386 PMAQI
16th Jul 2025387 PMAQI
16th Jul 2025348 PMAQI
16th Jul 2025349 PMAQI
16th Jul 20253710 PMAQI
16th Jul 20253811 PMAQI
17th Jul 20253812 AMAQI
17th Jul 2025381 AMAQI
17th Jul 2025372 AMAQI
17th Jul 2025373 AMAQI
17th Jul 2025364 AMAQI
23°C19/26°C
17th Jul 2025375 AMAQI
17th Jul 2025366 AMAQI
17th Jul 2025347 AMAQI
17th Jul 2025368 AMAQI
17th Jul 2025379 AMAQI
17th Jul 20253710 AMAQI
17th Jul 20253611 AMAQI
17th Jul 20253912 PMAQI
17th Jul 2025321 PMAQI
17th Jul 2025352 PMAQI
17th Jul 2025363 PMAQI
17th Jul 2025384 PMAQI
17th Jul 2025405 PMAQI
17th Jul 2025426 PMAQI
17th Jul 2025417 PMAQI
17th Jul 2025398 PMAQI
17th Jul 2025369 PMAQI
17th Jul 20253610 PMAQI
17th Jul 20254311 PMAQI
18th Jul 20253712 AMAQI
18th Jul 2025391 AMAQI
18th Jul 2025402 AMAQI
18th Jul 2025383 AMAQI
18th Jul 2025394 AMAQI
22°C18/27°C
18th Jul 2025465 AMAQI
18th Jul 2025416 AMAQI
18th Jul 2025347 AMAQI
18th Jul 2025368 AMAQI
18th Jul 2025349 AMAQI
18th Jul 20253510 AMAQI
18th Jul 20253611 AMAQI
18th Jul 20253612 PMAQI
18th Jul 2025361 PMAQI
18th Jul 2025352 PMAQI
18th Jul 2025353 PMAQI
18th Jul 2025354 PMAQI
18th Jul 2025335 PMAQI
18th Jul 2025366 PMAQI
18th Jul 2025377 PMAQI
18th Jul 2025368 PMAQI
18th Jul 2025379 PMAQI
18th Jul 20253610 PMAQI
18th Jul 20253311 PMAQI
19th Jul 20253412 AMAQI
19th Jul 2025331 AMAQI
19th Jul 2025342 AMAQI
19th Jul 2025313 AMAQI
19th Jul 2025334 AMAQI
19°C17/21°C
19th Jul 2025335 AMAQI
19th Jul 2025236 AMAQI
19th Jul 2025207 AMAQI
19th Jul 2025208 AMAQI
19th Jul 2025239 AMAQI
19th Jul 20252210 AMAQI
19th Jul 20252011 AMAQI
19th Jul 20252012 PMAQI
19th Jul 2025201 PMAQI
19th Jul 2025212 PMAQI
19th Jul 2025213 PMAQI
19th Jul 2025234 PMAQI
19th Jul 2025245 PMAQI
19th Jul 2025246 PMAQI
19th Jul 2025267 PMAQI
19th Jul 2025268 PMAQI
19th Jul 2025269 PMAQI
19th Jul 20252510 PMAQI
19th Jul 20252611 PMAQI
20th Jul 20252612 AMAQI
20th Jul 2025251 AMAQI
20th Jul 2025252 AMAQI
20th Jul 2025253 AMAQI
20th Jul 2025254 AMAQI
16°C14/16°C
20th Jul 2025245 AMAQI
20th Jul 2025196 AMAQI
20th Jul 2025187 AMAQI
20th Jul 2025208 AMAQI
20th Jul 2025249 AMAQI
20th Jul 20252110 AMAQI
20th Jul 20252011 AMAQI
20th Jul 20252012 PMAQI
20th Jul 2025211 PMAQI
20th Jul 2025222 PMAQI
20th Jul 2025243 PMAQI
20th Jul 2025254 PMAQI
20th Jul 2025255 PMAQI
20th Jul 2025256 PMAQI
20th Jul 2025287 PMAQI
20th Jul 2025278 PMAQI
20th Jul 2025249 PMAQI
20th Jul 20252410 PMAQI
20th Jul 20252411 PMAQI
21st Jul 20252412 AMAQI
21st Jul 2025241 AMAQI
21st Jul 2025262 AMAQI
21st Jul 2025243 AMAQI
21st Jul 2025274 AMAQI
17°C14/20°C
21st Jul 2025245 AMAQI
21st Jul 2025236 AMAQI
21st Jul 2025237 AMAQI
21st Jul 2025258 AMAQI
21st Jul 2025259 AMAQI
21st Jul 20252510 AMAQI
21st Jul 20252211 AMAQI
21st Jul 20252512 PMAQI
21st Jul 2025271 PMAQI
21st Jul 2025282 PMAQI
21st Jul 2025273 PMAQI
21st Jul 2025274 PMAQI
21st Jul 2025285 PMAQI
21st Jul 2025296 PMAQI
21st Jul 2025317 PMAQI
21st Jul 2025308 PMAQI
21st Jul 2025269 PMAQI
21st Jul 20252610 PMAQI
21st Jul 20252711 PMAQI
22nd Jul 20252812 AMAQI
22nd Jul 2025261 AMAQI
22nd Jul 2025262 AMAQI
22nd Jul 2025263 AMAQI
22nd Jul 2025254 AMAQI
19°C16/23°C
22nd Jul 2025255 AMAQI
22nd Jul 2025226 AMAQI
22nd Jul 2025227 AMAQI
22nd Jul 2025218 AMAQI
22nd Jul 2025209 AMAQI
22nd Jul 20252110 AMAQI
22nd Jul 20252211 AMAQI
22nd Jul 20252212 PMAQI
22nd Jul 2025241 PMAQI
22nd Jul 2025282 PMAQI
22nd Jul 2025303 PMAQI
22nd Jul 2025284 PMAQI
22nd Jul 2025265 PMAQI
22nd Jul 2025246 PMAQI
22nd Jul 2025257 PMAQI
22nd Jul 2025238 PMAQI
22nd Jul 2025249 PMAQI
22nd Jul 20252310 PMAQI
22nd Jul 20252111 PMAQI
23rd Jul 20252212 AMAQI
23rd Jul 2025241 AMAQI
23rd Jul 2025242 AMAQI
23rd Jul 2025233 AMAQI
23rd Jul 2025224 AMAQI
17°C16/19°C
23rd Jul 2025265 AMAQI
23rd Jul 2025226 AMAQI
23rd Jul 2025197 AMAQI
23rd Jul 2025188 AMAQI
23rd Jul 2025229 AMAQI
23rd Jul 20252310 AMAQI
23rd Jul 20252111 AMAQI
23rd Jul 20252112 PMAQI
23rd Jul 2025221 PMAQI
23rd Jul 2025212 PMAQI
23rd Jul 2025213 PMAQI
23rd Jul 2025254 PMAQI
23rd Jul 2025265 PMAQI
23rd Jul 2025256 PMAQI
23rd Jul 2025247 PMAQI
23rd Jul 2025268 PMAQI
23rd Jul 2025259 PMAQI
23rd Jul 20252310 PMAQI
23rd Jul 20252611 PMAQI
24th Jul 20252612 AMAQI
24th Jul 2025251 AMAQI
24th Jul 2025272 AMAQI
24th Jul 2025263 AMAQI
24th Jul 2025274 AMAQI
19°C16/21°C
24th Jul 2025275 AMAQI
24th Jul 2025296 AMAQI
24th Jul 2025247 AMAQI
24th Jul 2025258 AMAQI
24th Jul 2025269 AMAQI
24th Jul 20252510 AMAQI
24th Jul 20252211 AMAQI
24th Jul 20252112 PMAQI
24th Jul 2025191 PMAQI
24th Jul 2025242 PMAQI
24th Jul 2025263 PMAQI
24th Jul 2025264 PMAQI
24th Jul 2025265 PMAQI
24th Jul 2025266 PMAQI
24th Jul 2025247 PMAQI
24th Jul 2025248 PMAQI
24th Jul 2025249 PMAQI
24th Jul 20252410 PMAQI
24th Jul 20252411 PMAQI
25th Jul 20252212 AMAQI
25th Jul 2025221 AMAQI
25th Jul 2025202 AMAQI
25th Jul 2025183 AMAQI
25th Jul 2025204 AMAQI
18°C16/20°C
25th Jul 2025205 AMAQI
25th Jul 2025166 AMAQI
25th Jul 2025167 AMAQI
25th Jul 2025168 AMAQI
25th Jul 2025169 AMAQI
25th Jul 20251410 AMAQI
25th Jul 20251511 AMAQI
25th Jul 20251512 PMAQI
25th Jul 2025161 PMAQI
25th Jul 2025162 PMAQI
25th Jul 2025183 PMAQI
25th Jul 2025184 PMAQI
25th Jul 2025185 PMAQI
25th Jul 2025176 PMAQI
25th Jul 2025187 PMAQI
25th Jul 2025198 PMAQI
25th Jul 2025179 PMAQI
25th Jul 20251810 PMAQI
25th Jul 20251811 PMAQI
26th Jul 20251812 AMAQI
26th Jul 2025201 AMAQI
26th Jul 2025192 AMAQI
26th Jul 2025193 AMAQI
26th Jul 2025194 AMAQI
16°C15/18°C
26th Jul 2025205 AMAQI
26th Jul 2025186 AMAQI
26th Jul 2025207 AMAQI
26th Jul 2025218 AMAQI
26th Jul 2025209 AMAQI
26th Jul 20251910 AMAQI
26th Jul 20251911 AMAQI
26th Jul 20251812 PMAQI
26th Jul 2025221 PMAQI
26th Jul 2025252 PMAQI
26th Jul 2025243 PMAQI
26th Jul 2025244 PMAQI
26th Jul 2025245 PMAQI
26th Jul 2025226 PMAQI
26th Jul 2025267 PMAQI
26th Jul 2025278 PMAQI
26th Jul 2025229 PMAQI
26th Jul 20252010 PMAQI
26th Jul 20252211 PMAQI
27th Jul 20252212 AMAQI
27th Jul 2025261 AMAQI
27th Jul 2025262 AMAQI
27th Jul 2025243 AMAQI
27th Jul 2025244 AMAQI
17°C15/19°C
27th Jul 2025245 AMAQI
27th Jul 2025206 AMAQI
27th Jul 2025247 AMAQI
27th Jul 2025258 AMAQI
27th Jul 2025249 AMAQI
27th Jul 20252210 AMAQI
27th Jul 20252411 AMAQI
27th Jul 20252312 PMAQI
27th Jul 2025241 PMAQI
27th Jul 2025262 PMAQI
27th Jul 2025273 PMAQI
27th Jul 2025284 PMAQI
27th Jul 2025265 PMAQI
27th Jul 2025276 PMAQI
27th Jul 2025287 PMAQI
27th Jul 2025278 PMAQI
27th Jul 2025279 PMAQI
27th Jul 20252610 PMAQI
27th Jul 20252811 PMAQI
28th Jul 20252812 AMAQI
28th Jul 2025281 AMAQI
28th Jul 2025272 AMAQI
28th Jul 2025283 AMAQI
28th Jul 2025274 AMAQI
17°C13/20°C
28th Jul 2025275 AMAQI
28th Jul 2025266 AMAQI
28th Jul 2025217 AMAQI
28th Jul 2025248 AMAQI
28th Jul 2025249 AMAQI
28th Jul 20252710 AMAQI
28th Jul 20252511 AMAQI
28th Jul 20252612 PMAQI
28th Jul 2025301 PMAQI
28th Jul 2025302 PMAQI
28th Jul 2025313 PMAQI
28th Jul 2025304 PMAQI
28th Jul 2025295 PMAQI
28th Jul 2025286 PMAQI
28th Jul 2025287 PMAQI
28th Jul 2025328 PMAQI
28th Jul 2025289 PMAQI
28th Jul 20252910 PMAQI
28th Jul 20253111 PMAQI
29th Jul 20252912 AMAQI
29th Jul 2025281 AMAQI
29th Jul 2025302 AMAQI
29th Jul 2025323 AMAQI
29th Jul 2025314 AMAQI
17°C14/21°C
29th Jul 2025325 AMAQI
29th Jul 2025266 AMAQI
29th Jul 2025257 AMAQI
29th Jul 2025268 AMAQI
29th Jul 2025299 AMAQI
29th Jul 20253110 AMAQI
29th Jul 20253211 AMAQI
29th Jul 20252912 PMAQI
29th Jul 2025301 PMAQI
29th Jul 2025362 PMAQI
29th Jul 2025363 PMAQI
29th Jul 2025344 PMAQI
29th Jul 2025345 PMAQI
29th Jul 2025336 PMAQI
29th Jul 2025327 PMAQI
29th Jul 2025338 PMAQI
29th Jul 2025349 PMAQI
29th Jul 20253310 PMAQI
29th Jul 20253311 PMAQI
30th Jul 20253212 AMAQI
30th Jul 2025331 AMAQI
30th Jul 2025332 AMAQI
30th Jul 2025323 AMAQI
30th Jul 2025344 AMAQI
21°C16/26°C
30th Jul 2025305 AMAQI
30th Jul 2025326 AMAQI
30th Jul 2025267 AMAQI
30th Jul 2025308 AMAQI
30th Jul 2025319 AMAQI
30th Jul 20253010 AMAQI
30th Jul 20253011 AMAQI
30th Jul 20253012 PMAQI
30th Jul 2025321 PMAQI
30th Jul 2025332 PMAQI
30th Jul 2025333 PMAQI
30th Jul 2025344 PMAQI
30th Jul 2025335 PMAQI
30th Jul 2025336 PMAQI
30th Jul 2025337 PMAQI
30th Jul 2025338 PMAQI
30th Jul 2025339 PMAQI
30th Jul 20253310 PMAQI
30th Jul 20253011 PMAQI
31st Jul 20253212 AMAQI
31st Jul 2025321 AMAQI
31st Jul 2025312 AMAQI
31st Jul 2025303 AMAQI
31st Jul 2025324 AMAQI
23°C19/27°C
31st Jul 2025255 AMAQI
31st Jul 2025236 AMAQI
31st Jul 2025277 AMAQI
31st Jul 2025248 AMAQI
31st Jul 2025229 AMAQI
31st Jul 20251910 AMAQI
31st Jul 20251911 AMAQI
31st Jul 20251812 PMAQI
31st Jul 2025181 PMAQI
31st Jul 2025222 PMAQI
31st Jul 2025223 PMAQI
31st Jul 2025214 PMAQI
31st Jul 2025245 PMAQI
31st Jul 2025266 PMAQI
31st Jul 2025287 PMAQI
31st Jul 2025288 PMAQI
31st Jul 2025289 PMAQI
31st Jul 20252510 PMAQI
31st Jul 20252211 PMAQI
1st Aug 20252212 AMAQI
1st Aug 2025221 AMAQI
1st Aug 2025232 AMAQI
1st Aug 2025223 AMAQI
1st Aug 2025264 AMAQI
22°C19/24°C
1st Aug 2025245 AMAQI
1st Aug 2025246 AMAQI
1st Aug 2025227 AMAQI
1st Aug 2025198 AMAQI
1st Aug 2025179 AMAQI
1st Aug 20251610 AMAQI
1st Aug 20251611 AMAQI
1st Aug 20251812 PMAQI
1st Aug 2025181 PMAQI
1st Aug 2025202 PMAQI
1st Aug 2025233 PMAQI
1st Aug 2025224 PMAQI
1st Aug 2025245 PMAQI
1st Aug 2025266 PMAQI
1st Aug 2025267 PMAQI
1st Aug 2025288 PMAQI
1st Aug 2025229 PMAQI
1st Aug 20252210 PMAQI
1st Aug 20252511 PMAQI
2nd Aug 20252512 AMAQI
2nd Aug 2025261 AMAQI
2nd Aug 2025242 AMAQI
2nd Aug 2025233 AMAQI
2nd Aug 2025234 AMAQI
20°C17/23°C
2nd Aug 2025235 AMAQI
2nd Aug 2025206 AMAQI
2nd Aug 2025187 AMAQI
2nd Aug 2025168 AMAQI
2nd Aug 2025169 AMAQI
2nd Aug 20251610 AMAQI
2nd Aug 20251611 AMAQI
2nd Aug 20251512 PMAQI
2nd Aug 2025161 PMAQI
2nd Aug 2025142 PMAQI
2nd Aug 2025153 PMAQI
2nd Aug 2025144 PMAQI
2nd Aug 2025175 PMAQI
2nd Aug 2025166 PMAQI
2nd Aug 2025197 PMAQI
2nd Aug 2025198 PMAQI
2nd Aug 2025189 PMAQI
2nd Aug 20251810 PMAQI
2nd Aug 20252011 PMAQI
3rd Aug 20252212 AMAQI
3rd Aug 2025211 AMAQI
3rd Aug 2025202 AMAQI
3rd Aug 2025183 AMAQI
3rd Aug 2025204 AMAQI
18°C16/20°C
3rd Aug 2025215 AMAQI
3rd Aug 2025206 AMAQI
3rd Aug 2025207 AMAQI
3rd Aug 2025208 AMAQI
3rd Aug 2025199 AMAQI
3rd Aug 20252010 AMAQI
3rd Aug 20252311 AMAQI
3rd Aug 20252412 PMAQI
3rd Aug 2025281 PMAQI
3rd Aug 2025262 PMAQI
3rd Aug 2025263 PMAQI
3rd Aug 2025284 PMAQI
3rd Aug 2025265 PMAQI
3rd Aug 2025276 PMAQI
3rd Aug 2025327 PMAQI
3rd Aug 2025398 PMAQI
3rd Aug 2025229 PMAQI
3rd Aug 20253010 PMAQI
3rd Aug 20253711 PMAQI
4th Aug 20253612 AMAQI
4th Aug 2025381 AMAQI
4th Aug 2025402 AMAQI
4th Aug 2025393 AMAQI
4th Aug 2025394 AMAQI
17°C14/20°C
4th Aug 2025395 AMAQI
5 AM4th Aug 2025386 AMAQI
4th Aug 2025387 AMAQI
4th Aug 2025378 AMAQI
4th Aug 2025369 AMAQI
4th Aug 20253810 AMAQI
4th Aug 20253711 AMAQI
4th Aug 20253612 PMAQI
4th Aug 2025401 PMAQI
1 PM4th Aug 2025432 PMAQI
4th Aug 2025423 PMAQI
4th Aug 2025454 PMAQI
9 PM
1 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM
26AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
6 AM - 9 PM
24AQI
16 hours / Day
480 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 5 AM (Avg. 26), while the lowest AQI was between 6 AM to 9 PM (Avg. 24).
Night time
Avg. Highest Time
12 AM - 11 PM
25AQI
7 hours / Day
210 hours / Month
Avg. Lowest Time
12 AM - 11 PM
25AQI
7 hours / Day
210 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 25), while the lowest AQI was between 12 AM to 11 PM (Avg. 25).
2025 Days Vs Air Quality
Crofton Substation, North Cowichan, British Columbia, Canada
2025
96%
207
4%
8
Total number of days with different AQI categories in last 216 days in 2025 (149 days remaining)
Good
207 DaysModerate
8 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2025, 96% of 216 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Crofton Substation, North Cowichan, British Columbia, Canada
AQI levels in 2025
AQI
PM2.5
PM10
CO
SO2
NO2
O3
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
1st January 2025
29AQI
29AQI
2nd January 2025
29AQI
29AQI
3rd January 2025
26AQI
26AQI
4th January 2025
29AQI
29AQI
5th January 2025
22AQI
22AQI
6th January 2025
24AQI
24AQI
7th January 2025
36AQI
36AQI
8th January 2025
38AQI
38AQI
9th January 2025
34AQI
34AQI
10th January 2025
31AQI
31AQI
11th January 2025
24AQI
24AQI
12th January 2025
32AQI
32AQI
13th January 2025
37AQI
37AQI
14th January 2025
39AQI
39AQI
15th January 2025
54AQI
54AQI
16th January 2025
43AQI
43AQI
17th January 2025
30AQI
30AQI
18th January 2025
37AQI
37AQI
19th January 2025
40AQI
40AQI
20th January 2025
40AQI
40AQI
21st January 2025
47AQI
47AQI
22nd January 2025
51AQI
51AQI
23rd January 2025
52AQI
52AQI
24th January 2025
37AQI
37AQI
25th January 2025
41AQI
41AQI
26th January 2025
47AQI
47AQI
27th January 2025
52AQI
52AQI
28th January 2025
54AQI
54AQI
29th January 2025
59AQI
59AQI
30th January 2025
51AQI
51AQI
31st January 2025
32AQI
32AQI
1st February 2025
20AQI
20AQI
2nd February 2025
24AQI
24AQI
3rd February 2025
30AQI
30AQI
4th February 2025
27AQI
27AQI
5th February 2025
29AQI
29AQI
6th February 2025
28AQI
28AQI
7th February 2025
29AQI
29AQI
8th February 2025
61AQI
61AQI
9th February 2025
50AQI
50AQI
10th February 2025
46AQI
46AQI
11th February 2025
29AQI
29AQI
12th February 2025
37AQI
37AQI
13th February 2025
34AQI
34AQI
14th February 2025
45AQI
45AQI
15th February 2025
42AQI
42AQI
16th February 2025
25AQI
25AQI
17th February 2025
29AQI
29AQI
18th February 2025
31AQI
31AQI
19th February 2025
22AQI
22AQI
20th February 2025
19AQI
19AQI
21st February 2025
31AQI
31AQI
22nd February 2025
28AQI
28AQI
23rd February 2025
17AQI
17AQI
24th February 2025
25AQI
25AQI
25th February 2025
18AQI
18AQI
26th February 2025
28AQI
28AQI
27th February 2025
27AQI
27AQI
28th February 2025
37AQI
37AQI
1st March 2025
36AQI
36AQI
2nd March 2025
37AQI
37AQI
3rd March 2025
28AQI
28AQI
4th March 2025
20AQI
20AQI
5th March 2025
20AQI
20AQI
6th March 2025
22AQI
22AQI
7th March 2025
21AQI
21AQI
8th March 2025
22AQI
22AQI
9th March 2025
34AQI
34AQI
10th March 2025
32AQI
32AQI
11th March 2025
35AQI
35AQI
12th March 2025
28AQI
28AQI
13th March 2025
24AQI
24AQI
14th March 2025
24AQI
24AQI
15th March 2025
22AQI
22AQI
16th March 2025
20AQI
20AQI
17th March 2025
25AQI
25AQI
18th March 2025
20AQI
20AQI
19th March 2025
25AQI
25AQI
20th March 2025
18AQI
18AQI
21st March 2025
19AQI
19AQI
22nd March 2025
16AQI
16AQI
23rd March 2025
16AQI
16AQI
24th March 2025
22AQI
22AQI
25th March 2025
22AQI
22AQI
26th March 2025
24AQI
24AQI
27th March 2025
17AQI
17AQI
28th March 2025
16AQI
16AQI
29th March 2025
15AQI
15AQI
30th March 2025
18AQI
18AQI
31st March 2025
22AQI
22AQI
1st April 2025
17AQI
17AQI
2nd April 2025
20AQI
20AQI
3rd April 2025
24AQI
24AQI
4th April 2025
25AQI
25AQI
5th April 2025
24AQI
24AQI
6th April 2025
25AQI
25AQI
7th April 2025
14AQI
14AQI
8th April 2025
15AQI
15AQI
9th April 2025
14AQI
14AQI
10th April 2025
18AQI
18AQI
11th April 2025
17AQI
17AQI
12th April 2025
18AQI
18AQI
13th April 2025
22AQI
22AQI
14th April 2025
20AQI
20AQI
15th April 2025
19AQI
19AQI
16th April 2025
20AQI
20AQI
17th April 2025
18AQI
18AQI
18th April 2025
21AQI
21AQI
19th April 2025
20AQI
20AQI
20th April 2025
18AQI
18AQI
21st April 2025
16AQI
16AQI
22nd April 2025
15AQI
15AQI
23rd April 2025
18AQI
18AQI
24th April 2025
22AQI
22AQI
25th April 2025
30AQI
30AQI
26th April 2025
30AQI
30AQI
27th April 2025
29AQI
29AQI
28th April 2025
21AQI
21AQI
29th April 2025
17AQI
17AQI
30th April 2025
19AQI
19AQI
1st May 2025
24AQI
24AQI
2nd May 2025
29AQI
29AQI
3rd May 2025
19AQI
19AQI
4th May 2025
16AQI
16AQI
5th May 2025
19AQI
19AQI
6th May 2025
22AQI
22AQI
7th May 2025
23AQI
23AQI
8th May 2025
17AQI
17AQI
9th May 2025
19AQI
19AQI
10th May 2025
22AQI
22AQI
11th May 2025
18AQI
18AQI
12th May 2025
19AQI
19AQI
13th May 2025
21AQI
21AQI
14th May 2025
17AQI
17AQI
15th May 2025
17AQI
17AQI
16th May 2025
15AQI
15AQI
17th May 2025
16AQI
16AQI
18th May 2025
13AQI
13AQI
19th May 2025
14AQI
14AQI
20th May 2025
12AQI
12AQI
21st May 2025
13AQI
13AQI
22nd May 2025
16AQI
16AQI
23rd May 2025
16AQI
16AQI
24th May 2025
14AQI
14AQI
25th May 2025
16AQI
16AQI
26th May 2025
17AQI
17AQI
27th May 2025
15AQI
15AQI
28th May 2025
20AQI
20AQI
29th May 2025
14AQI
14AQI
30th May 2025
17AQI
17AQI
31st May 2025
16AQI
16AQI
1st June 2025
15AQI
15AQI
2nd June 2025
18AQI
18AQI
3rd June 2025
20AQI
20AQI
4th June 2025
17AQI
17AQI
5th June 2025
21AQI
21AQI
6th June 2025
18AQI
18AQI
7th June 2025
18AQI
18AQI
8th June 2025
23AQI
23AQI
9th June 2025
23AQI
23AQI
10th June 2025
25AQI
25AQI
11th June 2025
34AQI
34AQI
12th June 2025
30AQI
30AQI
13th June 2025
25AQI
25AQI
14th June 2025
21AQI
21AQI
15th June 2025
19AQI
19AQI
16th June 2025
19AQI
19AQI
17th June 2025
17AQI
17AQI
18th June 2025
15AQI
15AQI
19th June 2025
17AQI
17AQI
20th June 2025
18AQI
18AQI
21st June 2025
19AQI
19AQI
22nd June 2025
19AQI
19AQI
23rd June 2025
22AQI
22AQI
24th June 2025
35AQI
35AQI
25th June 2025
27AQI
27AQI
26th June 2025
18AQI
18AQI
27th June 2025
16AQI
16AQI
28th June 2025
15AQI
15AQI
29th June 2025
20AQI
20AQI
30th June 2025
22AQI
22AQI
1st July 2025
23AQI
23AQI
2nd July 2025
18AQI
18AQI
3rd July 2025
17AQI
17AQI
4th July 2025
20AQI
20AQI
5th July 2025
20AQI
20AQI
6th July 2025
20AQI
20AQI
7th July 2025
23AQI
23AQI
8th July 2025
21AQI
21AQI
9th July 2025
16AQI
16AQI
10th July 2025
17AQI
17AQI
11th July 2025
21AQI
21AQI
12th July 2025
19AQI
19AQI
13th July 2025
22AQI
22AQI
14th July 2025
19AQI
19AQI
15th July 2025
23AQI
23AQI
16th July 2025
34AQI
34AQI
17th July 2025
38AQI
38AQI
18th July 2025
37AQI
37AQI
19th July 2025
26AQI
26AQI
20th July 2025
24AQI
24AQI
21st July 2025
26AQI
26AQI
22nd July 2025
24AQI
24AQI
23rd July 2025
23AQI
23AQI
24th July 2025
25AQI
25AQI
25th July 2025
18AQI
18AQI
26th July 2025
21AQI
21AQI
27th July 2025
25AQI
25AQI
28th July 2025
28AQI
28AQI
29th July 2025
31AQI
31AQI
30th July 2025
32AQI
32AQI
31st July 2025
25AQI
25AQI
1st August 2025
22AQI
22AQI
2nd August 2025
19AQI
19AQI
3rd August 2025
24AQI
24AQI
39AQI
31AQI
23AQI
20AQI
18AQI
21AQI
24AQI
22AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202525AQI
24
7
27
1
31
30
31
30
31
3
207
8
Highest AQI recorded in
January39AQI
Lowest AQI recorded in
May18AQI
202418AQI
31
28
31
18
31
28
31
30
1
30
31
29
1
31
349
2
Highest AQI recorded in
December29AQI
Lowest AQI recorded in
April10AQI
202318AQI
31
27
1
31
29
30
30
31
26
5
30
30
1
26
3
30
351
10
Highest AQI recorded in
November27AQI
Lowest AQI recorded in
April12AQI
202220AQI
29
1
22
30
29
31
30
21
3
24
4
1
27
4
25
3
31
302
12
1
Highest AQI recorded in
November30AQI
Lowest AQI recorded in
June12AQI
202120AQI
30
28
30
30
31
25
2
31
28
2
26
31
30
31
351
4
Highest AQI recorded in
August25AQI
Lowest AQI recorded in
February15AQI
202021AQI
13
20
19
30
31
31
21
1
2
5
1
30
1
30
31
256
2
2
5
1
Highest AQI recorded in
September59AQI
Lowest AQI recorded in
December13AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2025(Avg.)
25AQILeast Polluted Year Recorded
2023(Avg.)
18AQICrofton Substation's annual 2025 AQI (25) shows an average percentage change of 27.8% (worsened AQI) compared to previous years: 2020 (21), 2021 (20), 2022 (20), 2023 (18), 2024 (18).
