Ottawa, Ontario, 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
Ottawa, Ontario, Canada
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
11th Aug 2021
76AQILowest AQI recorded on
9th Aug 2024
14AQISame Day Analysis (1st August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 22 of Good air quality, showing improvement over 2024 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 1st Aug - 2nd Aug 2025
Ottawa, Ontario, Canada
AQI
Day
Night
.
5 AM1st Aug 2025
8 PM
4 AM2nd Aug 2025
Day time
Avg. Highest Time
5AM1st Aug
24AQI
Avg. Lowest Time
8PM1st Aug
16AQI
Night time
Avg. Highest Time
3AM2nd Aug
28AQI
Avg. Lowest Time
9PM1st Aug
18AQI
In the last 24 hours,
Ottawa's AQI reached its highest point of 28 at 3 AM during the Night, while the lowest point, 16, was recorded at 8 PM during the Day between 1st Aug and 2nd Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Ottawa, Ontario, Canada
JulAug
03rd - 04th04th - 05th05th - 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
Day
Night
3rd Jul 2025345 AMAQI
3rd Jul 2025526 AMAQI
3rd Jul 2025537 AMAQI
3rd Jul 2025508 AMAQI
3rd Jul 2025469 AMAQI
3rd Jul 20254710 AMAQI
3rd Jul 20254811 AMAQI
3rd Jul 20254712 PMAQI
3rd Jul 2025471 PMAQI
3rd Jul 2025482 PMAQI
3rd Jul 2025463 PMAQI
3rd Jul 2025444 PMAQI
3rd Jul 2025435 PMAQI
3rd Jul 2025456 PMAQI
3rd Jul 2025417 PMAQI
3rd Jul 2025398 PMAQI
3rd Jul 2025379 PMAQI
3rd Jul 20253810 PMAQI
3rd Jul 20253811 PMAQI
4th Jul 20253912 AMAQI
4th Jul 2025391 AMAQI
4th Jul 2025312 AMAQI
4th Jul 2025243 AMAQI
4th Jul 2025234 AMAQI
23°C18/27°C
4th Jul 2025225 AMAQI
4th Jul 2025226 AMAQI
4th Jul 2025217 AMAQI
4th Jul 2025228 AMAQI
4th Jul 2025249 AMAQI
4th Jul 20252310 AMAQI
4th Jul 20252211 AMAQI
4th Jul 20252112 PMAQI
4th Jul 2025211 PMAQI
4th Jul 2025212 PMAQI
4th Jul 2025213 PMAQI
4th Jul 2025224 PMAQI
4th Jul 2025235 PMAQI
4th Jul 2025236 PMAQI
4th Jul 2025237 PMAQI
4th Jul 2025238 PMAQI
4th Jul 2025239 PMAQI
4th Jul 20252510 PMAQI
4th Jul 20252511 PMAQI
5th Jul 20252712 AMAQI
5th Jul 2025281 AMAQI
5th Jul 2025262 AMAQI
5th Jul 2025243 AMAQI
5th Jul 2025294 AMAQI
21°C13/28°C
5th Jul 2025285 AMAQI
5th Jul 2025276 AMAQI
5th Jul 2025287 AMAQI
5th Jul 2025288 AMAQI
5th Jul 2025299 AMAQI
5th Jul 20252510 AMAQI
5th Jul 20252611 AMAQI
5th Jul 20252612 PMAQI
5th Jul 2025271 PMAQI
5th Jul 2025272 PMAQI
5th Jul 2025273 PMAQI
5th Jul 2025284 PMAQI
5th Jul 2025265 PMAQI
5th Jul 2025276 PMAQI
5th Jul 2025287 PMAQI
5th Jul 2025288 PMAQI
5th Jul 2025299 PMAQI
5th Jul 20252810 PMAQI
5th Jul 20253211 PMAQI
6th Jul 20253312 AMAQI
6th Jul 2025371 AMAQI
6th Jul 2025432 AMAQI
6th Jul 2025473 AMAQI
6th Jul 2025494 AMAQI
23°C14/32°C
6th Jul 2025505 AMAQI
6th Jul 2025516 AMAQI
6th Jul 2025517 AMAQI
6th Jul 2025478 AMAQI
6th Jul 2025489 AMAQI
6th Jul 20254610 AMAQI
6th Jul 20254811 AMAQI
6th Jul 20254712 PMAQI
6th Jul 2025481 PMAQI
6th Jul 2025462 PMAQI
6th Jul 2025483 PMAQI
6th Jul 2025474 PMAQI
6th Jul 2025465 PMAQI
6th Jul 2025476 PMAQI
6th Jul 2025467 PMAQI
6th Jul 2025478 PMAQI
6th Jul 2025479 PMAQI
6th Jul 20254810 PMAQI
6th Jul 20254811 PMAQI
7th Jul 20254912 AMAQI
7th Jul 2025471 AMAQI
7th Jul 2025472 AMAQI
7th Jul 2025453 AMAQI
7th Jul 2025444 AMAQI
27°C21/37°C
7th Jul 2025455 AMAQI
7th Jul 2025446 AMAQI
7th Jul 2025467 AMAQI
7th Jul 2025508 AMAQI
7th Jul 2025519 AMAQI
7th Jul 20255410 AMAQI
7th Jul 20254811 AMAQI
7th Jul 20255212 PMAQI
7th Jul 2025501 PMAQI
7th Jul 2025432 PMAQI
7th Jul 2025383 PMAQI
7th Jul 2025414 PMAQI
7th Jul 2025435 PMAQI
7th Jul 2025406 PMAQI
7th Jul 2025407 PMAQI
7th Jul 2025388 PMAQI
7th Jul 2025439 PMAQI
7th Jul 20254110 PMAQI
7th Jul 20253211 PMAQI
8th Jul 20253312 AMAQI
8th Jul 2025341 AMAQI
8th Jul 2025262 AMAQI
8th Jul 2025213 AMAQI
8th Jul 2025214 AMAQI
20°C18/22°C
8th Jul 2025215 AMAQI
8th Jul 2025206 AMAQI
8th Jul 2025217 AMAQI
8th Jul 2025218 AMAQI
8th Jul 2025249 AMAQI
8th Jul 20252310 AMAQI
8th Jul 20252411 AMAQI
8th Jul 20252412 PMAQI
8th Jul 2025281 PMAQI
8th Jul 2025292 PMAQI
8th Jul 2025303 PMAQI
8th Jul 2025284 PMAQI
8th Jul 2025295 PMAQI
8th Jul 2025306 PMAQI
8th Jul 2025317 PMAQI
8th Jul 2025298 PMAQI
8th Jul 2025259 PMAQI
8th Jul 20252510 PMAQI
8th Jul 20252711 PMAQI
9th Jul 20252612 AMAQI
9th Jul 2025261 AMAQI
9th Jul 2025252 AMAQI
9th Jul 2025243 AMAQI
9th Jul 2025254 AMAQI
22°C16/28°C
9th Jul 2025245 AMAQI
9th Jul 2025246 AMAQI
9th Jul 2025257 AMAQI
9th Jul 2025248 AMAQI
9th Jul 2025259 AMAQI
9th Jul 20252710 AMAQI
9th Jul 20252711 AMAQI
9th Jul 20252712 PMAQI
9th Jul 2025271 PMAQI
9th Jul 2025282 PMAQI
9th Jul 2025253 PMAQI
9th Jul 2025264 PMAQI
9th Jul 2025285 PMAQI
9th Jul 2025286 PMAQI
9th Jul 2025287 PMAQI
9th Jul 2025288 PMAQI
9th Jul 2025279 PMAQI
9th Jul 20252710 PMAQI
9th Jul 20252911 PMAQI
10th Jul 20252712 AMAQI
10th Jul 2025291 AMAQI
10th Jul 2025292 AMAQI
10th Jul 2025313 AMAQI
10th Jul 2025304 AMAQI
23°C17/30°C
10th Jul 2025295 AMAQI
10th Jul 2025296 AMAQI
10th Jul 2025307 AMAQI
10th Jul 2025318 AMAQI
10th Jul 2025319 AMAQI
10th Jul 20253210 AMAQI
10th Jul 20253311 AMAQI
10th Jul 20253212 PMAQI
10th Jul 2025341 PMAQI
10th Jul 2025342 PMAQI
10th Jul 2025363 PMAQI
10th Jul 2025364 PMAQI
10th Jul 2025355 PMAQI
10th Jul 2025366 PMAQI
10th Jul 2025367 PMAQI
10th Jul 2025368 PMAQI
10th Jul 2025339 PMAQI
10th Jul 20253210 PMAQI
10th Jul 20253411 PMAQI
11th Jul 20253312 AMAQI
11th Jul 2025341 AMAQI
11th Jul 2025352 AMAQI
11th Jul 2025353 AMAQI
11th Jul 2025354 AMAQI
25°C19/32°C
11th Jul 2025345 AMAQI
11th Jul 2025346 AMAQI
11th Jul 2025337 AMAQI
11th Jul 2025338 AMAQI
11th Jul 2025369 AMAQI
11th Jul 20253710 AMAQI
11th Jul 20254011 AMAQI
11th Jul 20254012 PMAQI
11th Jul 2025421 PMAQI
11th Jul 2025442 PMAQI
11th Jul 2025413 PMAQI
11th Jul 2025404 PMAQI
11th Jul 2025395 PMAQI
11th Jul 2025396 PMAQI
11th Jul 2025397 PMAQI
11th Jul 2025398 PMAQI
11th Jul 2025379 PMAQI
11th Jul 20253610 PMAQI
11th Jul 20253811 PMAQI
12th Jul 20253712 AMAQI
12th Jul 2025401 AMAQI
12th Jul 2025452 AMAQI
12th Jul 2025503 AMAQI
12th Jul 2025514 AMAQI
24°C19/32°C
12th Jul 2025515 AMAQI
12th Jul 2025496 AMAQI
12th Jul 2025487 AMAQI
12th Jul 2025508 AMAQI
12th Jul 2025519 AMAQI
12th Jul 20255110 AMAQI
12th Jul 20255111 AMAQI
12th Jul 20254912 PMAQI
12th Jul 2025501 PMAQI
12th Jul 2025482 PMAQI
12th Jul 2025493 PMAQI
12th Jul 2025484 PMAQI
12th Jul 2025485 PMAQI
12th Jul 2025476 PMAQI
12th Jul 2025477 PMAQI
12th Jul 2025478 PMAQI
12th Jul 2025469 PMAQI
12th Jul 20254710 PMAQI
12th Jul 20254511 PMAQI
13th Jul 20254512 AMAQI
13th Jul 2025481 AMAQI
13th Jul 2025452 AMAQI
13th Jul 2025433 AMAQI
13th Jul 2025444 AMAQI
27°C19/36°C
13th Jul 2025435 AMAQI
13th Jul 2025466 AMAQI
13th Jul 2025417 AMAQI
13th Jul 2025418 AMAQI
13th Jul 2025419 AMAQI
13th Jul 20254210 AMAQI
13th Jul 20254111 AMAQI
13th Jul 20254212 PMAQI
13th Jul 2025431 PMAQI
13th Jul 2025412 PMAQI
13th Jul 2025423 PMAQI
13th Jul 2025444 PMAQI
13th Jul 2025425 PMAQI
13th Jul 2025416 PMAQI
13th Jul 2025417 PMAQI
13th Jul 2025408 PMAQI
13th Jul 2025429 PMAQI
13th Jul 20254110 PMAQI
13th Jul 20253711 PMAQI
14th Jul 20253712 AMAQI
14th Jul 2025371 AMAQI
14th Jul 2025302 AMAQI
14th Jul 2025283 AMAQI
14th Jul 2025314 AMAQI
25°C22/29°C
14th Jul 2025385 AMAQI
14th Jul 2025516 AMAQI
14th Jul 2025507 AMAQI
14th Jul 2025508 AMAQI
14th Jul 2025539 AMAQI
14th Jul 20255310 AMAQI
14th Jul 20255411 AMAQI
14th Jul 20255412 PMAQI
14th Jul 2025551 PMAQI
14th Jul 2025562 PMAQI
14th Jul 2025543 PMAQI
14th Jul 2025504 PMAQI
14th Jul 2025485 PMAQI
14th Jul 2025486 PMAQI
14th Jul 2025497 PMAQI
14th Jul 2025498 PMAQI
14th Jul 2025479 PMAQI
14th Jul 20254810 PMAQI
14th Jul 20254611 PMAQI
15th Jul 20254712 AMAQI
15th Jul 2025471 AMAQI
15th Jul 2025442 AMAQI
15th Jul 2025283 AMAQI
15th Jul 2025284 AMAQI
26°C20/32°C
15th Jul 2025345 AMAQI
15th Jul 2025356 AMAQI
15th Jul 2025407 AMAQI
15th Jul 2025458 AMAQI
15th Jul 2025589 AMAQI
15th Jul 20255810 AMAQI
15th Jul 20256011 AMAQI
15th Jul 20256112 PMAQI
15th Jul 2025461 PMAQI
15th Jul 2025502 PMAQI
15th Jul 2025493 PMAQI
15th Jul 2025494 PMAQI
15th Jul 2025505 PMAQI
15th Jul 2025506 PMAQI
15th Jul 2025507 PMAQI
15th Jul 2025508 PMAQI
15th Jul 2025509 PMAQI
15th Jul 20254810 PMAQI
15th Jul 20254811 PMAQI
16th Jul 20254712 AMAQI
16th Jul 2025471 AMAQI
16th Jul 2025452 AMAQI
16th Jul 2025443 AMAQI
16th Jul 2025524 AMAQI
26°C18/34°C
16th Jul 2025525 AMAQI
16th Jul 2025516 AMAQI
16th Jul 2025527 AMAQI
16th Jul 2025578 AMAQI
16th Jul 2025679 AMAQI
16th Jul 20256210 AMAQI
16th Jul 20256111 AMAQI
16th Jul 20256012 PMAQI
16th Jul 2025591 PMAQI
16th Jul 2025642 PMAQI
16th Jul 2025643 PMAQI
16th Jul 2025614 PMAQI
16th Jul 2025555 PMAQI
16th Jul 2025566 PMAQI
16th Jul 2025567 PMAQI
16th Jul 2025598 PMAQI
16th Jul 2025569 PMAQI
16th Jul 20255410 PMAQI
16th Jul 20255411 PMAQI
17th Jul 20255412 AMAQI
17th Jul 2025551 AMAQI
17th Jul 2025592 AMAQI
17th Jul 2025663 AMAQI
17th Jul 2025654 AMAQI
28°C19/35°C
17th Jul 2025655 AMAQI
17th Jul 2025646 AMAQI
17th Jul 2025597 AMAQI
17th Jul 2025508 AMAQI
17th Jul 2025509 AMAQI
17th Jul 20254510 AMAQI
17th Jul 20254411 AMAQI
17th Jul 20254512 PMAQI
17th Jul 2025481 PMAQI
17th Jul 2025482 PMAQI
17th Jul 2025473 PMAQI
17th Jul 2025494 PMAQI
17th Jul 2025505 PMAQI
17th Jul 2025516 PMAQI
17th Jul 2025507 PMAQI
17th Jul 2025498 PMAQI
17th Jul 2025519 PMAQI
17th Jul 20255110 PMAQI
17th Jul 20254411 PMAQI
18th Jul 20254612 AMAQI
18th Jul 2025431 AMAQI
18th Jul 2025272 AMAQI
18th Jul 2025193 AMAQI
18th Jul 2025194 AMAQI
24°C18/30°C
18th Jul 2025195 AMAQI
18th Jul 2025196 AMAQI
18th Jul 2025197 AMAQI
18th Jul 2025198 AMAQI
18th Jul 2025189 AMAQI
18th Jul 20251810 AMAQI
18th Jul 20252011 AMAQI
18th Jul 20252012 PMAQI
18th Jul 2025201 PMAQI
18th Jul 2025212 PMAQI
18th Jul 2025233 PMAQI
18th Jul 2025244 PMAQI
18th Jul 2025235 PMAQI
18th Jul 2025236 PMAQI
18th Jul 2025237 PMAQI
18th Jul 2025248 PMAQI
18th Jul 2025229 PMAQI
18th Jul 20252210 PMAQI
18th Jul 20252311 PMAQI
19th Jul 20252512 AMAQI
19th Jul 2025251 AMAQI
19th Jul 2025242 AMAQI
19th Jul 2025233 AMAQI
19th Jul 2025234 AMAQI
20°C12/29°C
19th Jul 2025245 AMAQI
19th Jul 2025246 AMAQI
19th Jul 2025257 AMAQI
19th Jul 2025268 AMAQI
19th Jul 2025269 AMAQI
19th Jul 20252710 AMAQI
19th Jul 20253011 AMAQI
19th Jul 20253512 PMAQI
19th Jul 2025421 PMAQI
19th Jul 2025402 PMAQI
19th Jul 2025403 PMAQI
19th Jul 2025394 PMAQI
19th Jul 2025345 PMAQI
19th Jul 2025356 PMAQI
19th Jul 2025357 PMAQI
19th Jul 2025358 PMAQI
19th Jul 2025339 PMAQI
19th Jul 20253110 PMAQI
19th Jul 20253511 PMAQI
20th Jul 20253512 AMAQI
20th Jul 2025341 AMAQI
20th Jul 2025312 AMAQI
20th Jul 2025303 AMAQI
20th Jul 2025284 AMAQI
22°C16/29°C
20th Jul 2025285 AMAQI
20th Jul 2025286 AMAQI
20th Jul 2025277 AMAQI
20th Jul 2025278 AMAQI
20th Jul 2025289 AMAQI
20th Jul 20252910 AMAQI
20th Jul 20252811 AMAQI
20th Jul 20252712 PMAQI
20th Jul 2025271 PMAQI
20th Jul 2025252 PMAQI
20th Jul 2025253 PMAQI
20th Jul 2025274 PMAQI
20th Jul 2025305 PMAQI
20th Jul 2025346 PMAQI
20th Jul 2025337 PMAQI
20th Jul 2025358 PMAQI
20th Jul 2025319 PMAQI
20th Jul 20253010 PMAQI
20th Jul 20253211 PMAQI
21st Jul 20253112 AMAQI
21st Jul 2025321 AMAQI
21st Jul 2025382 AMAQI
21st Jul 2025553 AMAQI
21st Jul 2025474 AMAQI
22°C18/29°C
21st Jul 2025335 AMAQI
21st Jul 2025256 AMAQI
21st Jul 2025227 AMAQI
21st Jul 2025238 AMAQI
21st Jul 2025259 AMAQI
21st Jul 20252310 AMAQI
21st Jul 20252411 AMAQI
21st Jul 20252312 PMAQI
21st Jul 2025221 PMAQI
21st Jul 2025222 PMAQI
21st Jul 2025213 PMAQI
21st Jul 2025234 PMAQI
21st Jul 2025255 PMAQI
21st Jul 2025256 PMAQI
21st Jul 2025257 PMAQI
21st Jul 2025248 PMAQI
21st Jul 2025269 PMAQI
21st Jul 20252610 PMAQI
21st Jul 20252411 PMAQI
22nd Jul 20252512 AMAQI
22nd Jul 2025251 AMAQI
22nd Jul 2025222 AMAQI
22nd Jul 2025173 AMAQI
22nd Jul 2025174 AMAQI
18°C14/21°C
22nd Jul 2025175 AMAQI
22nd Jul 2025166 AMAQI
22nd Jul 2025167 AMAQI
22nd Jul 2025168 AMAQI
22nd Jul 2025179 AMAQI
22nd Jul 20251810 AMAQI
22nd Jul 20251811 AMAQI
22nd Jul 20251712 PMAQI
22nd Jul 2025171 PMAQI
22nd Jul 2025182 PMAQI
22nd Jul 2025173 PMAQI
22nd Jul 2025184 PMAQI
22nd Jul 2025185 PMAQI
22nd Jul 2025186 PMAQI
22nd Jul 2025187 PMAQI
22nd Jul 2025188 PMAQI
22nd Jul 2025189 PMAQI
22nd Jul 20251910 PMAQI
22nd Jul 20251911 PMAQI
23rd Jul 20251912 AMAQI
23rd Jul 2025191 AMAQI
23rd Jul 2025202 AMAQI
23rd Jul 2025203 AMAQI
23rd Jul 2025224 AMAQI
19°C10/26°C
23rd Jul 2025215 AMAQI
23rd Jul 2025226 AMAQI
23rd Jul 2025237 AMAQI
23rd Jul 2025248 AMAQI
23rd Jul 2025409 AMAQI
23rd Jul 20252910 AMAQI
23rd Jul 20252711 AMAQI
23rd Jul 20252612 PMAQI
23rd Jul 2025211 PMAQI
23rd Jul 2025222 PMAQI
23rd Jul 2025193 PMAQI
23rd Jul 2025194 PMAQI
23rd Jul 2025215 PMAQI
23rd Jul 2025236 PMAQI
23rd Jul 2025227 PMAQI
23rd Jul 2025238 PMAQI
23rd Jul 2025239 PMAQI
23rd Jul 20252210 PMAQI
23rd Jul 20252411 PMAQI
24th Jul 20252312 AMAQI
24th Jul 2025241 AMAQI
24th Jul 2025222 AMAQI
24th Jul 2025213 AMAQI
24th Jul 2025204 AMAQI
21°C14/27°C
24th Jul 2025205 AMAQI
24th Jul 2025216 AMAQI
24th Jul 2025227 AMAQI
24th Jul 2025238 AMAQI
24th Jul 2025259 AMAQI
24th Jul 20252810 AMAQI
24th Jul 20252811 AMAQI
24th Jul 20252712 PMAQI
24th Jul 2025291 PMAQI
24th Jul 2025322 PMAQI
24th Jul 2025293 PMAQI
24th Jul 2025324 PMAQI
24th Jul 2025325 PMAQI
24th Jul 2025326 PMAQI
24th Jul 2025337 PMAQI
24th Jul 2025328 PMAQI
24th Jul 2025269 PMAQI
24th Jul 20252810 PMAQI
24th Jul 20253211 PMAQI
25th Jul 20253212 AMAQI
25th Jul 2025311 AMAQI
25th Jul 2025312 AMAQI
25th Jul 2025333 AMAQI
25th Jul 2025294 AMAQI
26°C16/35°C
25th Jul 2025295 AMAQI
25th Jul 2025276 AMAQI
25th Jul 2025277 AMAQI
25th Jul 2025288 AMAQI
25th Jul 2025269 AMAQI
25th Jul 20252710 AMAQI
25th Jul 20252811 AMAQI
25th Jul 20252412 PMAQI
25th Jul 2025281 PMAQI
25th Jul 2025342 PMAQI
25th Jul 2025483 PMAQI
25th Jul 2025414 PMAQI
25th Jul 2025325 PMAQI
25th Jul 2025326 PMAQI
25th Jul 2025327 PMAQI
25th Jul 2025318 PMAQI
25th Jul 2025349 PMAQI
25th Jul 20253410 PMAQI
25th Jul 20253211 PMAQI
26th Jul 20253312 AMAQI
26th Jul 2025321 AMAQI
26th Jul 2025352 AMAQI
26th Jul 2025493 AMAQI
26th Jul 2025484 AMAQI
26°C22/31°C
26th Jul 2025525 AMAQI
26th Jul 2025546 AMAQI
26th Jul 2025597 AMAQI
26th Jul 2025578 AMAQI
26th Jul 2025589 AMAQI
26th Jul 20255810 AMAQI
26th Jul 20255611 AMAQI
26th Jul 20254912 PMAQI
26th Jul 2025511 PMAQI
26th Jul 2025492 PMAQI
26th Jul 2025583 PMAQI
26th Jul 2025564 PMAQI
26th Jul 2025525 PMAQI
26th Jul 2025536 PMAQI
26th Jul 2025537 PMAQI
26th Jul 2025538 PMAQI
26th Jul 2025529 PMAQI
26th Jul 20255310 PMAQI
26th Jul 20255111 PMAQI
27th Jul 20255312 AMAQI
27th Jul 2025521 AMAQI
27th Jul 2025572 AMAQI
27th Jul 2025593 AMAQI
27th Jul 2025584 AMAQI
25°C18/33°C
27th Jul 2025595 AMAQI
27th Jul 2025606 AMAQI
27th Jul 2025607 AMAQI
27th Jul 2025618 AMAQI
27th Jul 2025619 AMAQI
27th Jul 20256010 AMAQI
27th Jul 20256111 AMAQI
27th Jul 20255912 PMAQI
27th Jul 2025571 PMAQI
27th Jul 2025562 PMAQI
27th Jul 2025553 PMAQI
27th Jul 2025564 PMAQI
27th Jul 2025575 PMAQI
27th Jul 2025586 PMAQI
27th Jul 2025577 PMAQI
27th Jul 2025578 PMAQI
27th Jul 2025579 PMAQI
27th Jul 20255710 PMAQI
27th Jul 20255711 PMAQI
28th Jul 20255712 AMAQI
28th Jul 2025571 AMAQI
28th Jul 2025572 AMAQI
28th Jul 2025583 AMAQI
28th Jul 2025604 AMAQI
26°C20/34°C
28th Jul 2025605 AMAQI
28th Jul 2025616 AMAQI
28th Jul 2025627 AMAQI
28th Jul 2025618 AMAQI
28th Jul 2025609 AMAQI
28th Jul 20256010 AMAQI
28th Jul 20256011 AMAQI
28th Jul 20256012 PMAQI
28th Jul 2025631 PMAQI
28th Jul 2025632 PMAQI
28th Jul 2025633 PMAQI
28th Jul 2025614 PMAQI
28th Jul 2025605 PMAQI
28th Jul 2025616 PMAQI
28th Jul 2025607 PMAQI
28th Jul 2025608 PMAQI
28th Jul 2025599 PMAQI
28th Jul 20255810 PMAQI
28th Jul 20255811 PMAQI
29th Jul 20255812 AMAQI
29th Jul 2025581 AMAQI
29th Jul 2025572 AMAQI
29th Jul 2025543 AMAQI
29th Jul 2025534 AMAQI
28°C20/37°C
29th Jul 2025455 AMAQI
29th Jul 2025356 AMAQI
29th Jul 2025307 AMAQI
29th Jul 2025318 AMAQI
29th Jul 2025359 AMAQI
29th Jul 20253510 AMAQI
29th Jul 20253611 AMAQI
29th Jul 20253712 PMAQI
29th Jul 2025401 PMAQI
29th Jul 2025412 PMAQI
29th Jul 2025443 PMAQI
29th Jul 2025484 PMAQI
29th Jul 2025525 PMAQI
29th Jul 2025536 PMAQI
29th Jul 2025537 PMAQI
29th Jul 2025548 PMAQI
29th Jul 2025539 PMAQI
29th Jul 20255310 PMAQI
29th Jul 20255211 PMAQI
30th Jul 20255112 AMAQI
30th Jul 2025481 AMAQI
30th Jul 2025492 AMAQI
30th Jul 2025593 AMAQI
30th Jul 2025624 AMAQI
25°C22/31°C
30th Jul 2025625 AMAQI
30th Jul 2025656 AMAQI
30th Jul 2025657 AMAQI
30th Jul 2025648 AMAQI
30th Jul 2025639 AMAQI
30th Jul 20256610 AMAQI
30th Jul 20256811 AMAQI
30th Jul 20256612 PMAQI
30th Jul 2025651 PMAQI
30th Jul 2025672 PMAQI
30th Jul 2025663 PMAQI
30th Jul 2025664 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 20256211 PMAQI
31st Jul 20256212 AMAQI
31st Jul 2025611 AMAQI
31st Jul 2025602 AMAQI
31st Jul 2025613 AMAQI
31st Jul 2025614 AMAQI
24°C19/30°C
31st Jul 2025685 AMAQI
31st Jul 2025656 AMAQI
31st Jul 2025607 AMAQI
31st Jul 2025658 AMAQI
31st Jul 2025719 AMAQI
31st Jul 20256510 AMAQI
31st Jul 20255911 AMAQI
31st Jul 20254912 PMAQI
31st Jul 2025411 PMAQI
31st Jul 2025352 PMAQI
31st Jul 2025323 PMAQI
31st Jul 2025324 PMAQI
31st Jul 2025355 PMAQI
31st Jul 2025356 PMAQI
31st Jul 2025317 PMAQI
31st Jul 2025328 PMAQI
31st Jul 2025669 PMAQI
31st Jul 20254710 PMAQI
31st Jul 20252911 PMAQI
1st Aug 20252812 AMAQI
1st Aug 2025281 AMAQI
1st Aug 2025352 AMAQI
1st Aug 2025303 AMAQI
1st Aug 2025264 AMAQI
21°C16/25°C
1st Aug 2025245 AMAQI
1st Aug 2025216 AMAQI
1st Aug 2025227 AMAQI
1st Aug 2025198 AMAQI
1st Aug 2025179 AMAQI
1st Aug 20251810 AMAQI
1st Aug 20251711 AMAQI
1st Aug 20251712 PMAQI
1st Aug 2025171 PMAQI
1st Aug 2025172 PMAQI
1st Aug 2025173 PMAQI
1st Aug 2025164 PMAQI
1st Aug 2025175 PMAQI
1st Aug 2025176 PMAQI
1st Aug 2025167 PMAQI
1st Aug 2025168 PMAQI
1st Aug 2025189 PMAQI
1st Aug 20251910 PMAQI
1st Aug 20252111 PMAQI
2nd Aug 20252412 AMAQI
2nd Aug 2025251 AMAQI
2nd Aug 2025272 AMAQI
2nd Aug 2025283 AMAQI
2nd Aug 2025264 AMAQI
19°C12/26°C
2nd Aug 2025315 AMAQI
5 AM2nd Aug 2025296 AMAQI
2nd Aug 2025267 AMAQI
2nd Aug 2025258 AMAQI
2nd Aug 2025249 AMAQI
2nd Aug 20252310 AMAQI
2nd Aug 20252411 AMAQI
12 PM
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 8 PM
39AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 8 AM
38AQI
4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 8 PM (Avg. 39), while the lowest AQI was between 5 AM to 8 AM (Avg. 38).
Night time
Avg. Highest Time
9 PM - 11 PM
38AQI
3 hours / Day
90 hours / Month
Avg. Lowest Time
12 AM - 4 AM
37AQI
5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 PM to 11 PM (Avg. 38), while the lowest AQI was between 12 AM to 4 AM (Avg. 37).
2025 Days Vs Air Quality
Ottawa, Ontario, Canada
2025
92%
195
8%
18
Total number of days with different AQI categories in last 214 days in 2025 (151 days remaining)
Good
195 DaysModerate
18 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 92%
Health Risk Level:
Very Low
In 2025, 92% of 214 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
Ottawa, Ontario, 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
21AQI
21AQI
2nd January 2025
21AQI
21AQI
3rd January 2025
21AQI
21AQI
4th January 2025
23AQI
23AQI
5th January 2025
22AQI
22AQI
6th January 2025
23AQI
23AQI
7th January 2025
21AQI
21AQI
8th January 2025
21AQI
21AQI
9th January 2025
24AQI
24AQI
10th January 2025
28AQI
28AQI
11th January 2025
37AQI
37AQI
12th January 2025
30AQI
30AQI
13th January 2025
51AQI
51AQI
14th January 2025
22AQI
22AQI
15th January 2025
22AQI
22AQI
16th January 2025
35AQI
35AQI
17th January 2025
50AQI
50AQI
18th January 2025
29AQI
29AQI
19th January 2025
21AQI
21AQI
20th January 2025
24AQI
24AQI
21st January 2025
38AQI
38AQI
22nd January 2025
42AQI
42AQI
23rd January 2025
37AQI
37AQI
24th January 2025
34AQI
34AQI
25th January 2025
54AQI
54AQI
26th January 2025
35AQI
35AQI
27th January 2025
26AQI
26AQI
28th January 2025
26AQI
26AQI
29th January 2025
23AQI
23AQI
30th January 2025
23AQI
23AQI
31st January 2025
35AQI
35AQI
1st February 2025
24AQI
24AQI
2nd February 2025
41AQI
41AQI
3rd February 2025
53AQI
53AQI
4th February 2025
22AQI
22AQI
5th February 2025
23AQI
23AQI
6th February 2025
34AQI
34AQI
7th February 2025
28AQI
28AQI
8th February 2025
23AQI
23AQI
9th February 2025
24AQI
24AQI
10th February 2025
22AQI
22AQI
11th February 2025
28AQI
28AQI
12th February 2025
28AQI
28AQI
13th February 2025
22AQI
22AQI
14th February 2025
21AQI
21AQI
15th February 2025
23AQI
23AQI
16th February 2025
21AQI
21AQI
17th February 2025
21AQI
21AQI
18th February 2025
20AQI
20AQI
19th February 2025
19AQI
19AQI
20th February 2025
22AQI
22AQI
21st February 2025
28AQI
28AQI
22nd February 2025
34AQI
34AQI
23rd February 2025
47AQI
47AQI
24th February 2025
47AQI
47AQI
25th February 2025
56AQI
56AQI
26th February 2025
30AQI
30AQI
27th February 2025
32AQI
32AQI
28th February 2025
28AQI
28AQI
1st March 2025
26AQI
26AQI
2nd March 2025
24AQI
24AQI
3rd March 2025
44AQI
44AQI
4th March 2025
38AQI
38AQI
5th March 2025
48AQI
48AQI
6th March 2025
26AQI
26AQI
7th March 2025
28AQI
28AQI
8th March 2025
30AQI
30AQI
9th March 2025
28AQI
28AQI
10th March 2025
25AQI
25AQI
11th March 2025
35AQI
35AQI
12th March 2025
26AQI
26AQI
13th March 2025
34AQI
34AQI
14th March 2025
60AQI
60AQI
15th March 2025
57AQI
57AQI
16th March 2025
43AQI
43AQI
17th March 2025
16AQI
16AQI
18th March 2025
23AQI
23AQI
19th March 2025
27AQI
27AQI
20th March 2025
30AQI
30AQI
21st March 2025
17AQI
17AQI
22nd March 2025
20AQI
20AQI
23rd March 2025
17AQI
17AQI
24th March 2025
23AQI
23AQI
25th March 2025
20AQI
20AQI
26th March 2025
20AQI
20AQI
27th March 2025
18AQI
18AQI
28th March 2025
18AQI
18AQI
29th March 2025
17AQI
17AQI
30th March 2025
20AQI
20AQI
31st March 2025
24AQI
24AQI
1st April 2025
16AQI
16AQI
2nd April 2025
19AQI
19AQI
3rd April 2025
22AQI
22AQI
4th April 2025
18AQI
18AQI
5th April 2025
20AQI
20AQI
6th April 2025
18AQI
18AQI
7th April 2025
20AQI
20AQI
8th April 2025
18AQI
18AQI
9th April 2025
16AQI
16AQI
10th April 2025
25AQI
25AQI
11th April 2025
31AQI
31AQI
12th April 2025
26AQI
26AQI
13th April 2025
27AQI
27AQI
14th April 2025
27AQI
27AQI
15th April 2025
22AQI
22AQI
16th April 2025
15AQI
15AQI
17th April 2025
16AQI
16AQI
18th April 2025
29AQI
29AQI
19th April 2025
38AQI
38AQI
20th April 2025
15AQI
15AQI
21st April 2025
19AQI
19AQI
22nd April 2025
16AQI
16AQI
23rd April 2025
13AQI
13AQI
24th April 2025
19AQI
19AQI
25th April 2025
20AQI
20AQI
26th April 2025
16AQI
16AQI
27th April 2025
12AQI
12AQI
28th April 2025
17AQI
17AQI
29th April 2025
25AQI
25AQI
30th April 2025
14AQI
14AQI
1st May 2025
21AQI
21AQI
2nd May 2025
21AQI
21AQI
3rd May 2025
13AQI
13AQI
4th May 2025
17AQI
17AQI
5th May 2025
16AQI
16AQI
6th May 2025
17AQI
17AQI
7th May 2025
18AQI
18AQI
8th May 2025
14AQI
14AQI
9th May 2025
16AQI
16AQI
10th May 2025
18AQI
18AQI
11th May 2025
15AQI
15AQI
12th May 2025
19AQI
19AQI
13th May 2025
27AQI
27AQI
14th May 2025
29AQI
29AQI
15th May 2025
26AQI
26AQI
16th May 2025
31AQI
31AQI
17th May 2025
32AQI
32AQI
18th May 2025
15AQI
15AQI
19th May 2025
12AQI
12AQI
20th May 2025
12AQI
12AQI
21st May 2025
19AQI
19AQI
22nd May 2025
14AQI
14AQI
23rd May 2025
15AQI
15AQI
24th May 2025
12AQI
12AQI
25th May 2025
15AQI
15AQI
26th May 2025
21AQI
21AQI
27th May 2025
22AQI
22AQI
28th May 2025
26AQI
26AQI
29th May 2025
21AQI
21AQI
30th May 2025
22AQI
22AQI
31st May 2025
23AQI
23AQI
1st June 2025
12AQI
12AQI
2nd June 2025
16AQI
16AQI
3rd June 2025
26AQI
26AQI
4th June 2025
44AQI
44AQI
5th June 2025
46AQI
46AQI
6th June 2025
53AQI
53AQI
7th June 2025
60AQI
60AQI
8th June 2025
57AQI
57AQI
9th June 2025
57AQI
57AQI
10th June 2025
39AQI
39AQI
11th June 2025
51AQI
51AQI
12th June 2025
53AQI
53AQI
13th June 2025
25AQI
25AQI
14th June 2025
24AQI
24AQI
15th June 2025
27AQI
27AQI
16th June 2025
35AQI
35AQI
17th June 2025
29AQI
29AQI
18th June 2025
29AQI
29AQI
19th June 2025
32AQI
32AQI
20th June 2025
19AQI
19AQI
21st June 2025
25AQI
25AQI
22nd June 2025
26AQI
26AQI
23rd June 2025
40AQI
40AQI
24th June 2025
50AQI
50AQI
25th June 2025
39AQI
39AQI
26th June 2025
25AQI
25AQI
27th June 2025
24AQI
24AQI
28th June 2025
27AQI
27AQI
29th June 2025
21AQI
21AQI
30th June 2025
28AQI
28AQI
1st July 2025
34AQI
34AQI
2nd July 2025
32AQI
32AQI
3rd July 2025
42AQI
42AQI
4th July 2025
25AQI
25AQI
5th July 2025
27AQI
27AQI
6th July 2025
46AQI
46AQI
7th July 2025
44AQI
44AQI
8th July 2025
26AQI
26AQI
9th July 2025
26AQI
26AQI
10th July 2025
32AQI
32AQI
11th July 2025
37AQI
37AQI
12th July 2025
47AQI
47AQI
13th July 2025
42AQI
42AQI
14th July 2025
45AQI
45AQI
15th July 2025
46AQI
46AQI
16th July 2025
54AQI
54AQI
17th July 2025
53AQI
53AQI
18th July 2025
24AQI
24AQI
19th July 2025
30AQI
30AQI
20th July 2025
30AQI
30AQI
21st July 2025
28AQI
28AQI
22nd July 2025
19AQI
19AQI
23rd July 2025
23AQI
23AQI
24th July 2025
27AQI
27AQI
25th July 2025
31AQI
31AQI
26th July 2025
50AQI
50AQI
27th July 2025
58AQI
58AQI
28th July 2025
60AQI
60AQI
29th July 2025
48AQI
48AQI
30th July 2025
62AQI
62AQI
31st July 2025
51AQI
51AQI
1st August 2025
22AQI
22AQI
30AQI
29AQI
28AQI
20AQI
19AQI
35AQI
39AQI
22AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202529AQI
29
2
26
2
29
2
30
31
24
6
25
6
1
195
18
Highest AQI recorded in
July39AQI
Lowest AQI recorded in
May19AQI
202429AQI
30
1
22
7
30
1
30
31
27
2
28
3
21
10
30
31
30
28
3
338
27
Highest AQI recorded in
February36AQI
Lowest AQI recorded in
November23AQI
202337AQI
30
1
22
6
29
2
30
30
1
14
9
2
5
19
11
1
25
6
23
7
28
3
27
2
24
7
301
55
3
5
Highest AQI recorded in
June74AQI
Lowest AQI recorded in
November28AQI
202230AQI
23
8
20
2
30
1
30
30
1
30
24
2
29
30
1
29
1
30
1
307
15
Highest AQI recorded in
January40AQI
Lowest AQI recorded in
August21AQI
202130AQI
24
6
25
3
26
5
30
31
30
25
6
25
6
30
31
29
1
28
3
334
30
Highest AQI recorded in
August37AQI
Lowest AQI recorded in
September20AQI
202026AQI
13
21
18
30
31
31
30
31
24
6
28
3
257
9
Highest AQI recorded in
November36AQI
Lowest AQI recorded in
August20AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
37AQILeast Polluted Year Recorded
2020(Avg.)
26AQIOttawa's annual 2025 AQI (29) shows an average percentage change of -4.7% (improved AQI) compared to previous years: 2020 (26), 2021 (30), 2022 (30), 2023 (37), 2024 (29).
