Chacnier, Longueuil, Quebec, 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
Chacnier, Longueuil, Quebec, Canada
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
21st Aug 2021
73AQILowest AQI recorded on
31st Aug 2021
13AQISame Day Analysis (4th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 65 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 4th Aug - 5th Aug 2025
Chacnier, Longueuil, Quebec, Canada
AQI
Day
Night
.
5 AM4th Aug 2025
8 PM
4 AM5th Aug 2025
Day time
Avg. Highest Time
2PM4th Aug
124AQI
Avg. Lowest Time
5AM4th Aug
57AQI
Night time
Avg. Highest Time
10PM4th Aug
78AQI
Avg. Lowest Time
3AM5th Aug
56AQI
In the last 24 hours,
Chacnier's AQI reached its highest point of 124 at 2 PM during the Day, while the lowest point, undefined, was recorded at 4 AM during the Night between 4th Aug and 5th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Chacnier, Longueuil, Quebec, Canada
JulAug
06th - 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 - 05th05th
Day
Night
6th Jul 2025415 AMAQI
6th Jul 2025436 AMAQI
6th Jul 2025467 AMAQI
6th Jul 2025488 AMAQI
6th Jul 2025489 AMAQI
6th Jul 20254610 AMAQI
6th Jul 20254511 AMAQI
6th Jul 20254212 PMAQI
6th Jul 2025431 PMAQI
6th Jul 2025422 PMAQI
6th Jul 2025413 PMAQI
6th Jul 2025404 PMAQI
6th Jul 2025365 PMAQI
6th Jul 2025356 PMAQI
6th Jul 2025377 PMAQI
6th Jul 2025378 PMAQI
6th Jul 2025389 PMAQI
6th Jul 20253910 PMAQI
6th Jul 20254011 PMAQI
7th Jul 20254412 AMAQI
7th Jul 2025431 AMAQI
7th Jul 2025392 AMAQI
7th Jul 2025443 AMAQI
7th Jul 2025464 AMAQI
27°C20/37°C
7th Jul 2025445 AMAQI
7th Jul 2025436 AMAQI
7th Jul 2025387 AMAQI
7th Jul 2025388 AMAQI
7th Jul 2025479 AMAQI
7th Jul 20255010 AMAQI
7th Jul 20255011 AMAQI
7th Jul 20255112 PMAQI
7th Jul 2025491 PMAQI
7th Jul 2025512 PMAQI
7th Jul 2025513 PMAQI
7th Jul 2025474 PMAQI
7th Jul 2025425 PMAQI
7th Jul 2025406 PMAQI
7th Jul 2025377 PMAQI
7th Jul 2025368 PMAQI
7th Jul 2025389 PMAQI
7th Jul 20253710 PMAQI
7th Jul 20253511 PMAQI
8th Jul 20253412 AMAQI
8th Jul 2025351 AMAQI
8th Jul 2025362 AMAQI
8th Jul 2025303 AMAQI
8th Jul 2025274 AMAQI
18°C15/23°C
8th Jul 2025255 AMAQI
8th Jul 2025246 AMAQI
8th Jul 2025267 AMAQI
8th Jul 2025288 AMAQI
8th Jul 2025299 AMAQI
8th Jul 20252810 AMAQI
8th Jul 20253011 AMAQI
8th Jul 20253012 PMAQI
8th Jul 2025321 PMAQI
8th Jul 2025342 PMAQI
8th Jul 2025363 PMAQI
8th Jul 2025354 PMAQI
8th Jul 2025345 PMAQI
8th Jul 2025326 PMAQI
8th Jul 2025327 PMAQI
8th Jul 2025308 PMAQI
8th Jul 2025299 PMAQI
8th Jul 20252810 PMAQI
8th Jul 20252911 PMAQI
9th Jul 20253012 AMAQI
9th Jul 2025301 AMAQI
9th Jul 2025312 AMAQI
9th Jul 2025353 AMAQI
9th Jul 2025414 AMAQI
22°C16/30°C
9th Jul 2025435 AMAQI
9th Jul 2025446 AMAQI
9th Jul 2025507 AMAQI
9th Jul 2025478 AMAQI
9th Jul 2025469 AMAQI
9th Jul 20254610 AMAQI
9th Jul 20255011 AMAQI
9th Jul 20254612 PMAQI
9th Jul 2025451 PMAQI
9th Jul 2025402 PMAQI
9th Jul 2025433 PMAQI
9th Jul 2025434 PMAQI
9th Jul 2025425 PMAQI
9th Jul 2025406 PMAQI
9th Jul 2025407 PMAQI
9th Jul 2025408 PMAQI
9th Jul 2025419 PMAQI
9th Jul 20254410 PMAQI
9th Jul 20254011 PMAQI
10th Jul 20254012 AMAQI
10th Jul 2025421 AMAQI
10th Jul 2025422 AMAQI
10th Jul 2025453 AMAQI
10th Jul 2025484 AMAQI
23°C16/31°C
10th Jul 2025485 AMAQI
10th Jul 2025506 AMAQI
10th Jul 2025507 AMAQI
10th Jul 2025508 AMAQI
10th Jul 2025469 AMAQI
10th Jul 20254810 AMAQI
10th Jul 20254811 AMAQI
10th Jul 20254812 PMAQI
10th Jul 2025481 PMAQI
10th Jul 2025492 PMAQI
10th Jul 2025463 PMAQI
10th Jul 2025464 PMAQI
10th Jul 2025465 PMAQI
10th Jul 2025456 PMAQI
10th Jul 2025487 PMAQI
10th Jul 2025508 PMAQI
10th Jul 2025479 PMAQI
10th Jul 20254210 PMAQI
10th Jul 20254311 PMAQI
11th Jul 20254212 AMAQI
11th Jul 2025421 AMAQI
11th Jul 2025442 AMAQI
11th Jul 2025483 AMAQI
11th Jul 2025514 AMAQI
24°C18/30°C
11th Jul 2025515 AMAQI
11th Jul 2025506 AMAQI
11th Jul 2025507 AMAQI
11th Jul 2025518 AMAQI
11th Jul 2025499 AMAQI
11th Jul 20255110 AMAQI
11th Jul 20255211 AMAQI
11th Jul 20255212 PMAQI
11th Jul 2025521 PMAQI
11th Jul 2025522 PMAQI
11th Jul 2025523 PMAQI
11th Jul 2025544 PMAQI
11th Jul 2025505 PMAQI
11th Jul 2025506 PMAQI
11th Jul 2025497 PMAQI
11th Jul 2025508 PMAQI
11th Jul 2025469 PMAQI
11th Jul 20254610 PMAQI
11th Jul 20254811 PMAQI
12th Jul 20254712 AMAQI
12th Jul 2025471 AMAQI
12th Jul 2025482 AMAQI
12th Jul 2025513 AMAQI
12th Jul 2025544 AMAQI
25°C18/32°C
12th Jul 2025525 AMAQI
12th Jul 2025506 AMAQI
12th Jul 2025517 AMAQI
12th Jul 2025528 AMAQI
12th Jul 2025529 AMAQI
12th Jul 20255210 AMAQI
12th Jul 20255311 AMAQI
12th Jul 20255412 PMAQI
12th Jul 2025541 PMAQI
12th Jul 2025552 PMAQI
12th Jul 2025553 PMAQI
12th Jul 2025544 PMAQI
12th Jul 2025525 PMAQI
12th Jul 2025526 PMAQI
12th Jul 2025527 PMAQI
12th Jul 2025528 PMAQI
12th Jul 2025529 PMAQI
12th Jul 20255210 PMAQI
12th Jul 20255211 PMAQI
13th Jul 20255012 AMAQI
13th Jul 2025511 AMAQI
13th Jul 2025522 AMAQI
13th Jul 2025453 AMAQI
13th Jul 2025444 AMAQI
26°C19/34°C
13th Jul 2025425 AMAQI
13th Jul 2025406 AMAQI
13th Jul 2025407 AMAQI
13th Jul 2025448 AMAQI
13th Jul 2025409 AMAQI
13th Jul 20254010 AMAQI
13th Jul 20254011 AMAQI
13th Jul 20254012 PMAQI
13th Jul 2025401 PMAQI
13th Jul 2025382 PMAQI
13th Jul 2025403 PMAQI
13th Jul 2025424 PMAQI
13th Jul 2025425 PMAQI
13th Jul 2025426 PMAQI
13th Jul 2025427 PMAQI
13th Jul 2025428 PMAQI
13th Jul 2025429 PMAQI
13th Jul 20254210 PMAQI
13th Jul 20254011 PMAQI
14th Jul 20254212 AMAQI
14th Jul 2025441 AMAQI
14th Jul 2025432 AMAQI
14th Jul 2025403 AMAQI
14th Jul 2025364 AMAQI
26°C23/31°C
14th Jul 2025345 AMAQI
14th Jul 2025346 AMAQI
14th Jul 2025347 AMAQI
14th Jul 2025348 AMAQI
14th Jul 2025359 AMAQI
14th Jul 20253510 AMAQI
14th Jul 20253811 AMAQI
14th Jul 20254612 PMAQI
14th Jul 2025481 PMAQI
14th Jul 2025442 PMAQI
14th Jul 2025443 PMAQI
14th Jul 2025434 PMAQI
14th Jul 2025415 PMAQI
14th Jul 2025436 PMAQI
14th Jul 2025427 PMAQI
14th Jul 2025428 PMAQI
14th Jul 2025409 PMAQI
14th Jul 20254110 PMAQI
14th Jul 20253811 PMAQI
15th Jul 20253912 AMAQI
15th Jul 2025401 AMAQI
15th Jul 2025382 AMAQI
15th Jul 2025363 AMAQI
15th Jul 2025304 AMAQI
26°C22/34°C
15th Jul 2025345 AMAQI
15th Jul 2025366 AMAQI
15th Jul 2025427 AMAQI
15th Jul 2025398 AMAQI
15th Jul 2025449 AMAQI
15th Jul 20254510 AMAQI
15th Jul 20254211 AMAQI
15th Jul 20254212 PMAQI
15th Jul 2025461 PMAQI
15th Jul 2025462 PMAQI
15th Jul 2025463 PMAQI
15th Jul 2025464 PMAQI
15th Jul 2025425 PMAQI
15th Jul 2025426 PMAQI
15th Jul 2025427 PMAQI
15th Jul 2025428 PMAQI
15th Jul 2025429 PMAQI
15th Jul 20254010 PMAQI
15th Jul 20254011 PMAQI
16th Jul 20254112 AMAQI
16th Jul 2025401 AMAQI
16th Jul 2025402 AMAQI
16th Jul 2025423 AMAQI
16th Jul 2025524 AMAQI
26°C19/34°C
16th Jul 2025525 AMAQI
16th Jul 2025516 AMAQI
16th Jul 2025537 AMAQI
16th Jul 2025548 AMAQI
16th Jul 2025529 AMAQI
16th Jul 20255210 AMAQI
16th Jul 20255211 AMAQI
16th Jul 20255212 PMAQI
16th Jul 2025511 PMAQI
16th Jul 2025512 PMAQI
16th Jul 2025523 PMAQI
16th Jul 2025524 PMAQI
16th Jul 2025515 PMAQI
16th Jul 2025516 PMAQI
16th Jul 2025507 PMAQI
16th Jul 2025518 PMAQI
16th Jul 2025509 PMAQI
16th Jul 20254910 PMAQI
16th Jul 20254911 PMAQI
17th Jul 20255012 AMAQI
17th Jul 2025501 AMAQI
17th Jul 2025502 AMAQI
17th Jul 2025533 AMAQI
17th Jul 2025564 AMAQI
28°C21/35°C
17th Jul 2025545 AMAQI
17th Jul 2025496 AMAQI
17th Jul 2025467 AMAQI
17th Jul 2025448 AMAQI
17th Jul 2025489 AMAQI
17th Jul 20254810 AMAQI
17th Jul 20254611 AMAQI
17th Jul 20254612 PMAQI
17th Jul 2025481 PMAQI
17th Jul 2025432 PMAQI
17th Jul 2025413 PMAQI
17th Jul 2025444 PMAQI
17th Jul 2025485 PMAQI
17th Jul 2025476 PMAQI
17th Jul 2025457 PMAQI
17th Jul 2025448 PMAQI
17th Jul 2025479 PMAQI
17th Jul 20254610 PMAQI
17th Jul 20254011 PMAQI
18th Jul 20253912 AMAQI
18th Jul 2025381 AMAQI
18th Jul 2025382 AMAQI
18th Jul 2025243 AMAQI
18th Jul 2025164 AMAQI
27°C18/31°C
18th Jul 2025155 AMAQI
18th Jul 2025146 AMAQI
18th Jul 2025167 AMAQI
18th Jul 2025168 AMAQI
18th Jul 2025199 AMAQI
18th Jul 20252110 AMAQI
18th Jul 20252211 AMAQI
18th Jul 20252112 PMAQI
18th Jul 2025201 PMAQI
18th Jul 2025222 PMAQI
18th Jul 2025223 PMAQI
18th Jul 2025224 PMAQI
18th Jul 2025235 PMAQI
18th Jul 2025236 PMAQI
18th Jul 2025257 PMAQI
18th Jul 2025248 PMAQI
18th Jul 2025249 PMAQI
18th Jul 20252310 PMAQI
18th Jul 20252711 PMAQI
19th Jul 20252712 AMAQI
19th Jul 2025261 AMAQI
19th Jul 2025272 AMAQI
19th Jul 2025273 AMAQI
19th Jul 2025294 AMAQI
20°C14/28°C
19th Jul 2025285 AMAQI
19th Jul 2025286 AMAQI
19th Jul 2025277 AMAQI
19th Jul 2025278 AMAQI
19th Jul 2025279 AMAQI
19th Jul 20252610 AMAQI
19th Jul 20252511 AMAQI
19th Jul 20252612 PMAQI
19th Jul 2025291 PMAQI
19th Jul 2025342 PMAQI
19th Jul 2025383 PMAQI
19th Jul 2025344 PMAQI
19th Jul 2025335 PMAQI
19th Jul 2025366 PMAQI
19th Jul 2025397 PMAQI
19th Jul 2025378 PMAQI
19th Jul 2025329 PMAQI
19th Jul 20253010 PMAQI
19th Jul 20253511 PMAQI
20th Jul 20253412 AMAQI
20th Jul 2025331 AMAQI
20th Jul 2025342 AMAQI
20th Jul 2025373 AMAQI
20th Jul 2025464 AMAQI
22°C15/30°C
20th Jul 2025475 AMAQI
20th Jul 2025476 AMAQI
20th Jul 2025427 AMAQI
20th Jul 2025398 AMAQI
20th Jul 2025379 AMAQI
20th Jul 20253510 AMAQI
20th Jul 20253411 AMAQI
20th Jul 20253312 PMAQI
20th Jul 2025321 PMAQI
20th Jul 2025332 PMAQI
20th Jul 2025323 PMAQI
20th Jul 2025324 PMAQI
20th Jul 2025345 PMAQI
20th Jul 2025356 PMAQI
20th Jul 2025367 PMAQI
20th Jul 2025368 PMAQI
20th Jul 2025369 PMAQI
20th Jul 20253910 PMAQI
20th Jul 20254111 PMAQI
21st Jul 20253912 AMAQI
21st Jul 2025371 AMAQI
21st Jul 2025372 AMAQI
21st Jul 2025473 AMAQI
21st Jul 2025524 AMAQI
21°C17/29°C
21st Jul 2025455 AMAQI
21st Jul 2025386 AMAQI
21st Jul 2025327 AMAQI
21st Jul 2025338 AMAQI
21st Jul 2025329 AMAQI
21st Jul 20253010 AMAQI
21st Jul 20252811 AMAQI
21st Jul 20252812 PMAQI
21st Jul 2025251 PMAQI
21st Jul 2025232 PMAQI
21st Jul 2025233 PMAQI
21st Jul 2025264 PMAQI
21st Jul 2025285 PMAQI
21st Jul 2025276 PMAQI
21st Jul 2025287 PMAQI
21st Jul 2025298 PMAQI
21st Jul 2025299 PMAQI
21st Jul 20252710 PMAQI
21st Jul 20252711 PMAQI
22nd Jul 20252712 AMAQI
22nd Jul 2025261 AMAQI
22nd Jul 2025272 AMAQI
22nd Jul 2025223 AMAQI
22nd Jul 2025174 AMAQI
19°C14/24°C
22nd Jul 2025185 AMAQI
22nd Jul 2025186 AMAQI
22nd Jul 2025187 AMAQI
22nd Jul 2025178 AMAQI
22nd Jul 2025189 AMAQI
22nd Jul 20251810 AMAQI
22nd Jul 20251911 AMAQI
22nd Jul 20251812 PMAQI
22nd Jul 2025181 PMAQI
22nd Jul 2025192 PMAQI
22nd Jul 2025193 PMAQI
22nd Jul 2025204 PMAQI
22nd Jul 2025205 PMAQI
22nd Jul 2025206 PMAQI
22nd Jul 2025207 PMAQI
22nd Jul 2025208 PMAQI
22nd Jul 2025199 PMAQI
22nd Jul 20251910 PMAQI
22nd Jul 20252011 PMAQI
23rd Jul 20252012 AMAQI
23rd Jul 2025201 AMAQI
23rd Jul 2025202 AMAQI
23rd Jul 2025223 AMAQI
23rd Jul 2025234 AMAQI
19°C11/24°C
23rd Jul 2025245 AMAQI
23rd Jul 2025246 AMAQI
23rd Jul 2025257 AMAQI
23rd Jul 2025258 AMAQI
23rd Jul 2025259 AMAQI
23rd Jul 20252810 AMAQI
23rd Jul 20252811 AMAQI
23rd Jul 20252812 PMAQI
23rd Jul 2025251 PMAQI
23rd Jul 2025242 PMAQI
23rd Jul 2025223 PMAQI
23rd Jul 2025234 PMAQI
23rd Jul 2025245 PMAQI
23rd Jul 2025236 PMAQI
23rd Jul 2025237 PMAQI
23rd Jul 2025238 PMAQI
23rd Jul 2025239 PMAQI
23rd Jul 20252310 PMAQI
23rd Jul 20252511 PMAQI
24th Jul 20252412 AMAQI
24th Jul 2025261 AMAQI
24th Jul 2025252 AMAQI
24th Jul 2025263 AMAQI
24th Jul 2025274 AMAQI
21°C12/29°C
24th Jul 2025265 AMAQI
24th Jul 2025266 AMAQI
24th Jul 2025267 AMAQI
24th Jul 2025268 AMAQI
24th Jul 2025289 AMAQI
24th Jul 20253010 AMAQI
24th Jul 20253211 AMAQI
24th Jul 20253512 PMAQI
24th Jul 2025401 PMAQI
24th Jul 2025422 PMAQI
24th Jul 2025423 PMAQI
24th Jul 2025384 PMAQI
24th Jul 2025325 PMAQI
24th Jul 2025316 PMAQI
24th Jul 2025327 PMAQI
24th Jul 2025338 PMAQI
24th Jul 2025339 PMAQI
24th Jul 20253410 PMAQI
24th Jul 20253511 PMAQI
25th Jul 20253212 AMAQI
25th Jul 2025311 AMAQI
25th Jul 2025332 AMAQI
25th Jul 2025403 AMAQI
25th Jul 2025474 AMAQI
26°C17/35°C
25th Jul 2025365 AMAQI
25th Jul 2025326 AMAQI
25th Jul 2025327 AMAQI
25th Jul 2025338 AMAQI
25th Jul 2025339 AMAQI
25th Jul 20253210 AMAQI
25th Jul 20253211 AMAQI
25th Jul 20253312 PMAQI
25th Jul 2025331 PMAQI
25th Jul 2025372 PMAQI
25th Jul 2025443 PMAQI
25th Jul 2025444 PMAQI
25th Jul 2025385 PMAQI
25th Jul 2025386 PMAQI
25th Jul 2025367 PMAQI
25th Jul 2025378 PMAQI
25th Jul 2025419 PMAQI
25th Jul 20253810 PMAQI
25th Jul 20253611 PMAQI
26th Jul 20253612 AMAQI
26th Jul 2025361 AMAQI
26th Jul 2025372 AMAQI
26th Jul 2025593 AMAQI
26th Jul 2025444 AMAQI
26°C23/31°C
26th Jul 2025445 AMAQI
26th Jul 2025536 AMAQI
26th Jul 2025567 AMAQI
26th Jul 2025528 AMAQI
26th Jul 2025489 AMAQI
26th Jul 20255010 AMAQI
26th Jul 20255011 AMAQI
26th Jul 20255212 PMAQI
26th Jul 2025511 PMAQI
26th Jul 2025512 PMAQI
26th Jul 2025483 PMAQI
26th Jul 2025504 PMAQI
26th Jul 2025525 PMAQI
26th Jul 2025516 PMAQI
26th Jul 2025517 PMAQI
26th Jul 2025528 PMAQI
26th Jul 2025519 PMAQI
26th Jul 20255110 PMAQI
26th Jul 20255111 PMAQI
27th Jul 20255112 AMAQI
27th Jul 2025511 AMAQI
27th Jul 2025512 AMAQI
27th Jul 2025493 AMAQI
27th Jul 2025604 AMAQI
24°C15/33°C
27th Jul 2025575 AMAQI
27th Jul 2025576 AMAQI
27th Jul 2025567 AMAQI
27th Jul 2025568 AMAQI
27th Jul 2025569 AMAQI
27th Jul 20255610 AMAQI
27th Jul 20255811 AMAQI
27th Jul 20255512 PMAQI
27th Jul 2025561 PMAQI
27th Jul 2025562 PMAQI
27th Jul 2025563 PMAQI
27th Jul 2025564 PMAQI
27th Jul 2025575 PMAQI
27th Jul 2025576 PMAQI
27th Jul 2025567 PMAQI
27th Jul 2025578 PMAQI
27th Jul 2025559 PMAQI
27th Jul 20255610 PMAQI
27th Jul 20255611 PMAQI
28th Jul 20255512 AMAQI
28th Jul 2025551 AMAQI
28th Jul 2025562 AMAQI
28th Jul 2025543 AMAQI
28th Jul 2025544 AMAQI
24°C18/31°C
28th Jul 2025565 AMAQI
28th Jul 2025606 AMAQI
28th Jul 2025607 AMAQI
28th Jul 2025588 AMAQI
28th Jul 2025599 AMAQI
28th Jul 20255910 AMAQI
28th Jul 20255911 AMAQI
28th Jul 20255912 PMAQI
28th Jul 2025591 PMAQI
28th Jul 2025602 PMAQI
28th Jul 2025583 PMAQI
28th Jul 2025574 PMAQI
28th Jul 2025575 PMAQI
28th Jul 2025576 PMAQI
28th Jul 2025577 PMAQI
28th Jul 2025578 PMAQI
28th Jul 2025589 PMAQI
28th Jul 20255910 PMAQI
28th Jul 20255611 PMAQI
29th Jul 20255612 AMAQI
29th Jul 2025561 AMAQI
29th Jul 2025572 AMAQI
29th Jul 2025583 AMAQI
29th Jul 2025584 AMAQI
27°C20/33°C
29th Jul 2025585 AMAQI
29th Jul 2025566 AMAQI
29th Jul 2025567 AMAQI
29th Jul 2025568 AMAQI
29th Jul 2025569 AMAQI
29th Jul 20255410 AMAQI
29th Jul 20255311 AMAQI
29th Jul 20255012 PMAQI
29th Jul 2025471 PMAQI
29th Jul 2025442 PMAQI
29th Jul 2025443 PMAQI
29th Jul 2025484 PMAQI
29th Jul 2025535 PMAQI
29th Jul 2025536 PMAQI
29th Jul 2025547 PMAQI
29th Jul 2025558 PMAQI
29th Jul 2025569 PMAQI
29th Jul 20255610 PMAQI
29th Jul 20255711 PMAQI
30th Jul 20255712 AMAQI
30th Jul 2025561 AMAQI
30th Jul 2025572 AMAQI
30th Jul 2025563 AMAQI
30th Jul 2025594 AMAQI
25°C21/29°C
30th Jul 2025605 AMAQI
30th Jul 2025596 AMAQI
30th Jul 2025597 AMAQI
30th Jul 2025618 AMAQI
30th Jul 2025649 AMAQI
30th Jul 20256010 AMAQI
30th Jul 20256111 AMAQI
30th Jul 20256212 PMAQI
30th Jul 2025621 PMAQI
30th Jul 2025622 PMAQI
30th Jul 2025633 PMAQI
30th Jul 2025654 PMAQI
30th Jul 2025655 PMAQI
30th Jul 2025656 PMAQI
30th Jul 2025657 PMAQI
30th Jul 2025658 PMAQI
30th Jul 2025659 PMAQI
30th Jul 20256510 PMAQI
30th Jul 20255911 PMAQI
31st Jul 20256112 AMAQI
31st Jul 2025611 AMAQI
31st Jul 2025602 AMAQI
31st Jul 2025593 AMAQI
31st Jul 2025604 AMAQI
24°C19/29°C
31st Jul 2025675 AMAQI
31st Jul 2025626 AMAQI
31st Jul 2025577 AMAQI
31st Jul 2025518 AMAQI
31st Jul 2025489 AMAQI
31st Jul 20254510 AMAQI
31st Jul 20254111 AMAQI
31st Jul 20253612 PMAQI
31st Jul 2025341 PMAQI
31st Jul 2025322 PMAQI
31st Jul 2025343 PMAQI
31st Jul 2025354 PMAQI
31st Jul 2025345 PMAQI
31st Jul 2025336 PMAQI
31st Jul 2025357 PMAQI
31st Jul 2025338 PMAQI
31st Jul 2025469 PMAQI
31st Jul 20254010 PMAQI
31st Jul 20253211 PMAQI
1st Aug 20253212 AMAQI
1st Aug 2025341 AMAQI
1st Aug 2025322 AMAQI
1st Aug 2025323 AMAQI
1st Aug 2025314 AMAQI
19°C15/24°C
1st Aug 2025295 AMAQI
1st Aug 2025266 AMAQI
1st Aug 2025227 AMAQI
1st Aug 2025198 AMAQI
1st Aug 2025189 AMAQI
1st Aug 20251810 AMAQI
1st Aug 20251811 AMAQI
1st Aug 20251812 PMAQI
1st Aug 2025171 PMAQI
1st Aug 2025172 PMAQI
1st Aug 2025173 PMAQI
1st Aug 2025164 PMAQI
1st Aug 2025175 PMAQI
1st Aug 2025166 PMAQI
1st Aug 2025177 PMAQI
1st Aug 2025168 PMAQI
1st Aug 2025199 PMAQI
1st Aug 20252010 PMAQI
1st Aug 20252011 PMAQI
2nd Aug 20252212 AMAQI
2nd Aug 2025241 AMAQI
2nd Aug 2025252 AMAQI
2nd Aug 2025283 AMAQI
2nd Aug 2025294 AMAQI
18°C10/26°C
2nd Aug 2025315 AMAQI
2nd Aug 2025266 AMAQI
2nd Aug 2025267 AMAQI
2nd Aug 2025238 AMAQI
2nd Aug 2025229 AMAQI
2nd Aug 20252210 AMAQI
2nd Aug 20252111 AMAQI
2nd Aug 20252112 PMAQI
2nd Aug 2025211 PMAQI
2nd Aug 2025252 PMAQI
2nd Aug 2025323 PMAQI
2nd Aug 2025384 PMAQI
2nd Aug 2025535 PMAQI
2nd Aug 2025606 PMAQI
2nd Aug 2025517 PMAQI
2nd Aug 2025298 PMAQI
2nd Aug 2025299 PMAQI
2nd Aug 20253010 PMAQI
2nd Aug 20253811 PMAQI
3rd Aug 20254312 AMAQI
3rd Aug 2025401 AMAQI
3rd Aug 2025452 AMAQI
3rd Aug 2025523 AMAQI
3rd Aug 2025464 AMAQI
21°C12/30°C
3rd Aug 2025455 AMAQI
3rd Aug 2025486 AMAQI
3rd Aug 2025447 AMAQI
3rd Aug 2025428 AMAQI
3rd Aug 2025379 AMAQI
3rd Aug 20254510 AMAQI
3rd Aug 20255811 AMAQI
3rd Aug 20256612 PMAQI
3rd Aug 2025721 PMAQI
3rd Aug 2025722 PMAQI
3rd Aug 2025703 PMAQI
3rd Aug 2025704 PMAQI
3rd Aug 2025765 PMAQI
3rd Aug 2025756 PMAQI
3rd Aug 2025697 PMAQI
3rd Aug 2025668 PMAQI
3rd Aug 2025559 PMAQI
3rd Aug 20256410 PMAQI
3rd Aug 20256211 PMAQI
4th Aug 20256112 AMAQI
4th Aug 2025601 AMAQI
4th Aug 2025592 AMAQI
4th Aug 2025563 AMAQI
4th Aug 2025494 AMAQI
24°C15/33°C
4th Aug 2025575 AMAQI
4th Aug 2025616 AMAQI
4th Aug 2025647 AMAQI
4th Aug 2025658 AMAQI
4th Aug 2025689 AMAQI
4th Aug 20257810 AMAQI
4th Aug 20258011 AMAQI
4th Aug 20258012 PMAQI
4th Aug 20251021 PMAQI
4th Aug 20251242 PMAQI
4th Aug 20251043 PMAQI
4th Aug 20251034 PMAQI
4th Aug 2025965 PMAQI
4th Aug 2025886 PMAQI
4th Aug 2025877 PMAQI
4th Aug 2025868 PMAQI
4th Aug 2025739 PMAQI
4th Aug 20257810 PMAQI
4th Aug 20257411 PMAQI
5th Aug 20257112 AMAQI
5th Aug 2025641 AMAQI
5th Aug 2025582 AMAQI
5th Aug 2025563 AMAQI
22°C17/27°C
5 AM
12 PM
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 8 PM
43AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 8 PM
43AQI
16 hours / Day
480 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 8 PM (Avg. 43), while the lowest AQI was between 5 AM to 8 PM (Avg. 43).
Night time
Avg. Highest Time
12 AM - 11 PM
42AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
42AQI
8 hours / Day
240 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 42), while the lowest AQI was between 12 AM to 11 PM (Avg. 42).
2025 Days Vs Air Quality
Chacnier, Longueuil, Quebec, Canada
2025
91%
197
9%
19
Total number of days with different AQI categories in last 217 days in 2025 (148 days remaining)
Good
197 DaysModerate
19 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 91%
Health Risk Level:
Very Low
In 2025, 91% of 217 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
Chacnier, Longueuil, Quebec, 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
24AQI
24AQI
3rd January 2025
22AQI
22AQI
4th January 2025
20AQI
20AQI
5th January 2025
22AQI
22AQI
6th January 2025
24AQI
24AQI
7th January 2025
21AQI
21AQI
8th January 2025
22AQI
22AQI
9th January 2025
20AQI
20AQI
10th January 2025
22AQI
22AQI
11th January 2025
38AQI
38AQI
12th January 2025
35AQI
35AQI
13th January 2025
58AQI
58AQI
14th January 2025
36AQI
36AQI
15th January 2025
25AQI
25AQI
16th January 2025
26AQI
26AQI
17th January 2025
48AQI
48AQI
18th January 2025
46AQI
46AQI
19th January 2025
26AQI
26AQI
20th January 2025
23AQI
23AQI
21st January 2025
38AQI
38AQI
22nd January 2025
57AQI
57AQI
23rd January 2025
43AQI
43AQI
24th January 2025
45AQI
45AQI
25th January 2025
49AQI
49AQI
26th January 2025
38AQI
38AQI
27th January 2025
25AQI
25AQI
28th January 2025
25AQI
25AQI
29th January 2025
32AQI
32AQI
30th January 2025
27AQI
27AQI
31st January 2025
35AQI
35AQI
1st February 2025
26AQI
26AQI
2nd February 2025
39AQI
39AQI
3rd February 2025
53AQI
53AQI
4th February 2025
27AQI
27AQI
5th February 2025
22AQI
22AQI
6th February 2025
34AQI
34AQI
7th February 2025
33AQI
33AQI
8th February 2025
24AQI
24AQI
9th February 2025
35AQI
35AQI
10th February 2025
25AQI
25AQI
11th February 2025
28AQI
28AQI
12th February 2025
31AQI
31AQI
13th February 2025
26AQI
26AQI
14th February 2025
21AQI
21AQI
15th February 2025
22AQI
22AQI
16th February 2025
23AQI
23AQI
17th February 2025
21AQI
21AQI
18th February 2025
22AQI
22AQI
19th February 2025
20AQI
20AQI
20th February 2025
26AQI
26AQI
21st February 2025
19AQI
19AQI
22nd February 2025
26AQI
26AQI
23rd February 2025
50AQI
50AQI
24th February 2025
48AQI
48AQI
25th February 2025
59AQI
59AQI
26th February 2025
43AQI
43AQI
27th February 2025
40AQI
40AQI
28th February 2025
42AQI
42AQI
1st March 2025
44AQI
44AQI
2nd March 2025
24AQI
24AQI
3rd March 2025
37AQI
37AQI
4th March 2025
39AQI
39AQI
5th March 2025
58AQI
58AQI
6th March 2025
24AQI
24AQI
7th March 2025
22AQI
22AQI
8th March 2025
25AQI
25AQI
9th March 2025
25AQI
25AQI
10th March 2025
31AQI
31AQI
11th March 2025
49AQI
49AQI
12th March 2025
23AQI
23AQI
13th March 2025
42AQI
42AQI
14th March 2025
78AQI
78AQI
15th March 2025
57AQI
57AQI
16th March 2025
50AQI
50AQI
17th March 2025
46AQI
46AQI
18th March 2025
41AQI
41AQI
19th March 2025
36AQI
36AQI
20th March 2025
28AQI
28AQI
21st March 2025
21AQI
21AQI
22nd March 2025
23AQI
23AQI
23rd March 2025
19AQI
19AQI
24th March 2025
25AQI
25AQI
25th March 2025
26AQI
26AQI
26th March 2025
22AQI
22AQI
27th March 2025
20AQI
20AQI
28th March 2025
22AQI
22AQI
29th March 2025
20AQI
20AQI
30th March 2025
25AQI
25AQI
31st March 2025
33AQI
33AQI
1st April 2025
19AQI
19AQI
2nd April 2025
20AQI
20AQI
3rd April 2025
21AQI
21AQI
4th April 2025
19AQI
19AQI
5th April 2025
20AQI
20AQI
6th April 2025
17AQI
17AQI
7th April 2025
20AQI
20AQI
8th April 2025
21AQI
21AQI
9th April 2025
17AQI
17AQI
10th April 2025
25AQI
25AQI
11th April 2025
32AQI
32AQI
12th April 2025
40AQI
40AQI
13th April 2025
25AQI
25AQI
14th April 2025
32AQI
32AQI
15th April 2025
29AQI
29AQI
16th April 2025
15AQI
15AQI
17th April 2025
16AQI
16AQI
18th April 2025
25AQI
25AQI
19th April 2025
43AQI
43AQI
20th April 2025
16AQI
16AQI
21st April 2025
22AQI
22AQI
22nd April 2025
22AQI
22AQI
23rd April 2025
18AQI
18AQI
24th April 2025
25AQI
25AQI
25th April 2025
24AQI
24AQI
26th April 2025
23AQI
23AQI
27th April 2025
14AQI
14AQI
28th April 2025
24AQI
24AQI
29th April 2025
31AQI
31AQI
30th April 2025
18AQI
18AQI
1st May 2025
18AQI
18AQI
2nd May 2025
26AQI
26AQI
3rd May 2025
16AQI
16AQI
4th May 2025
29AQI
29AQI
5th May 2025
22AQI
22AQI
6th May 2025
22AQI
22AQI
7th May 2025
17AQI
17AQI
8th May 2025
15AQI
15AQI
9th May 2025
19AQI
19AQI
10th May 2025
24AQI
24AQI
11th May 2025
17AQI
17AQI
12th May 2025
22AQI
22AQI
13th May 2025
33AQI
33AQI
14th May 2025
38AQI
38AQI
15th May 2025
30AQI
30AQI
16th May 2025
42AQI
42AQI
17th May 2025
41AQI
41AQI
18th May 2025
25AQI
25AQI
19th May 2025
19AQI
19AQI
20th May 2025
19AQI
19AQI
21st May 2025
26AQI
26AQI
22nd May 2025
23AQI
23AQI
23rd May 2025
21AQI
21AQI
24th May 2025
18AQI
18AQI
25th May 2025
21AQI
21AQI
26th May 2025
27AQI
27AQI
27th May 2025
30AQI
30AQI
28th May 2025
32AQI
32AQI
29th May 2025
33AQI
33AQI
30th May 2025
27AQI
27AQI
31st May 2025
31AQI
31AQI
1st June 2025
15AQI
15AQI
2nd June 2025
17AQI
17AQI
3rd June 2025
26AQI
26AQI
4th June 2025
41AQI
41AQI
5th June 2025
42AQI
42AQI
6th June 2025
53AQI
53AQI
7th June 2025
58AQI
58AQI
8th June 2025
57AQI
57AQI
9th June 2025
59AQI
59AQI
10th June 2025
43AQI
43AQI
11th June 2025
50AQI
50AQI
12th June 2025
56AQI
56AQI
13th June 2025
28AQI
28AQI
14th June 2025
28AQI
28AQI
15th June 2025
31AQI
31AQI
16th June 2025
38AQI
38AQI
17th June 2025
40AQI
40AQI
18th June 2025
27AQI
27AQI
19th June 2025
39AQI
39AQI
20th June 2025
23AQI
23AQI
21st June 2025
23AQI
23AQI
22nd June 2025
24AQI
24AQI
23rd June 2025
38AQI
38AQI
24th June 2025
50AQI
50AQI
25th June 2025
47AQI
47AQI
26th June 2025
31AQI
31AQI
27th June 2025
30AQI
30AQI
28th June 2025
27AQI
27AQI
29th June 2025
29AQI
29AQI
30th June 2025
29AQI
29AQI
1st July 2025
33AQI
33AQI
2nd July 2025
30AQI
30AQI
3rd July 2025
38AQI
38AQI
4th July 2025
24AQI
24AQI
5th July 2025
27AQI
27AQI
6th July 2025
39AQI
39AQI
7th July 2025
43AQI
43AQI
8th July 2025
30AQI
30AQI
9th July 2025
41AQI
41AQI
10th July 2025
46AQI
46AQI
11th July 2025
49AQI
49AQI
12th July 2025
52AQI
52AQI
13th July 2025
43AQI
43AQI
14th July 2025
40AQI
40AQI
15th July 2025
40AQI
40AQI
16th July 2025
49AQI
49AQI
17th July 2025
47AQI
47AQI
18th July 2025
24AQI
24AQI
19th July 2025
30AQI
30AQI
20th July 2025
37AQI
37AQI
21st July 2025
33AQI
33AQI
22nd July 2025
20AQI
20AQI
23rd July 2025
24AQI
24AQI
24th July 2025
31AQI
31AQI
25th July 2025
36AQI
36AQI
26th July 2025
49AQI
49AQI
27th July 2025
55AQI
55AQI
28th July 2025
57AQI
57AQI
29th July 2025
54AQI
54AQI
30th July 2025
61AQI
61AQI
31st July 2025
46AQI
46AQI
1st August 2025
22AQI
22AQI
2nd August 2025
31AQI
31AQI
3rd August 2025
57AQI
57AQI
4th August 2025
65AQI
65AQI
32AQI
32AQI
33AQI
23AQI
25AQI
37AQI
40AQI
44AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202532AQI
29
2
26
2
28
3
30
31
25
5
26
5
2
2
197
19
Highest AQI recorded in
August44AQI
Lowest AQI recorded in
April23AQI
202431AQI
21
1
17
5
24
2
27
1
24
1
27
3
29
2
23
7
22
7
31
30
27
3
1
302
32
1
Highest AQI recorded in
September39AQI
Lowest AQI recorded in
November24AQI
202336AQI
19
4
11
5
20
4
21
3
24
2
8
5
2
1
17
7
1
1
21
2
2
6
14
24
22
5
203
43
3
1
1
Highest AQI recorded in
June56AQI
Lowest AQI recorded in
October24AQI
202232AQI
12
11
14
3
19
2
10
19
1
22
2
13
3
4
20
17
2
14
4
17
181
28
Highest AQI recorded in
January46AQI
Lowest AQI recorded in
September21AQI
202130AQI
22
4
18
8
19
2
20
24
3
21
3
18
3
15
7
23
21
1
23
3
21
245
34
Highest AQI recorded in
February42AQI
Lowest AQI recorded in
September24AQI
202023AQI
7
17
13
7
1
23
20
21
1
29
20
4
23
180
6
Highest AQI recorded in
November32AQI
Lowest AQI recorded in
March16AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
36AQILeast Polluted Year Recorded
2020(Avg.)
23AQIChacnier's annual 2025 AQI (32) shows an average percentage change of 7.4% (worsened AQI) compared to previous years: 2020 (23), 2021 (30), 2022 (32), 2023 (36), 2024 (31).
