Ottawa Downtown, 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 Downtown, Ottawa, Ontario, Canada
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
11th Aug 2021
93AQILowest AQI recorded on
9th Aug 2024
14AQISame Day Analysis (1st August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 20 of Good air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 2nd Aug - 3rd Aug 2025
Ottawa Downtown, Ottawa, Ontario, Canada
AQI
Day
Night
.
5 AM2nd Aug 2025
8 PM
4 AM3rd Aug 2025
Day time
Avg. Highest Time
5PM2nd Aug
65AQI
Avg. Lowest Time
10AM2nd Aug
23AQI
Night time
Avg. Highest Time
12AM3rd Aug
47AQI
Avg. Lowest Time
9PM2nd Aug
29AQI
In the last 24 hours,
Ottawa Downtown's AQI reached its highest point of 65 at 5 PM during the Day, while the lowest point, undefined, was recorded at 4 AM during the Night between 2nd Aug and 3rd Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Ottawa Downtown, Ottawa, Ontario, Canada
JulAug
04th - 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 - 03rd03rd
Day
Night
4th Jul 2025225 AMAQI
4th Jul 2025226 AMAQI
4th Jul 2025227 AMAQI
4th Jul 2025228 AMAQI
4th Jul 2025249 AMAQI
4th Jul 20252210 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 2025226 PMAQI
4th Jul 2025237 PMAQI
4th Jul 2025228 PMAQI
4th Jul 2025239 PMAQI
4th Jul 20252510 PMAQI
4th Jul 20252511 PMAQI
5th Jul 20252612 AMAQI
5th Jul 2025301 AMAQI
5th Jul 2025262 AMAQI
5th Jul 2025243 AMAQI
5th Jul 2025284 AMAQI
21°C13/28°C
5th Jul 2025285 AMAQI
5th Jul 2025286 AMAQI
5th Jul 2025267 AMAQI
5th Jul 2025288 AMAQI
5th Jul 2025329 AMAQI
5th Jul 20252310 AMAQI
5th Jul 20252711 AMAQI
5th Jul 20252712 PMAQI
5th Jul 2025281 PMAQI
5th Jul 2025272 PMAQI
5th Jul 2025283 PMAQI
5th Jul 2025284 PMAQI
5th Jul 2025265 PMAQI
5th Jul 2025266 PMAQI
5th Jul 2025287 PMAQI
5th Jul 2025298 PMAQI
5th Jul 2025309 PMAQI
5th Jul 20252810 PMAQI
5th Jul 20253211 PMAQI
6th Jul 20253312 AMAQI
6th Jul 2025361 AMAQI
6th Jul 2025442 AMAQI
6th Jul 2025483 AMAQI
6th Jul 2025504 AMAQI
23°C14/32°C
6th Jul 2025525 AMAQI
6th Jul 2025526 AMAQI
6th Jul 2025517 AMAQI
6th Jul 2025488 AMAQI
6th Jul 2025499 AMAQI
6th Jul 20254610 AMAQI
6th Jul 20254911 AMAQI
6th Jul 20254812 PMAQI
6th Jul 2025501 PMAQI
6th Jul 2025472 PMAQI
6th Jul 2025483 PMAQI
6th Jul 2025484 PMAQI
6th Jul 2025465 PMAQI
6th Jul 2025466 PMAQI
6th Jul 2025477 PMAQI
6th Jul 2025488 PMAQI
6th Jul 2025499 PMAQI
6th Jul 20254910 PMAQI
6th Jul 20254911 PMAQI
7th Jul 20254912 AMAQI
7th Jul 2025491 AMAQI
7th Jul 2025472 AMAQI
7th Jul 2025463 AMAQI
7th Jul 2025454 AMAQI
27°C21/37°C
7th Jul 2025455 AMAQI
7th Jul 2025446 AMAQI
7th Jul 2025487 AMAQI
7th Jul 2025538 AMAQI
7th Jul 2025539 AMAQI
7th Jul 20255410 AMAQI
7th Jul 20254611 AMAQI
7th Jul 20255312 PMAQI
7th Jul 2025511 PMAQI
7th Jul 2025442 PMAQI
7th Jul 2025383 PMAQI
7th Jul 2025444 PMAQI
7th Jul 2025445 PMAQI
7th Jul 2025426 PMAQI
7th Jul 2025417 PMAQI
7th Jul 2025408 PMAQI
7th Jul 2025459 PMAQI
7th Jul 20254410 PMAQI
7th Jul 20253311 PMAQI
8th Jul 20253512 AMAQI
8th Jul 2025351 AMAQI
8th Jul 2025242 AMAQI
8th Jul 2025213 AMAQI
8th Jul 2025214 AMAQI
20°C18/22°C
8th Jul 2025215 AMAQI
8th Jul 2025206 AMAQI
8th Jul 2025207 AMAQI
8th Jul 2025218 AMAQI
8th Jul 2025239 AMAQI
8th Jul 20252310 AMAQI
8th Jul 20252311 AMAQI
8th Jul 20252312 PMAQI
8th Jul 2025281 PMAQI
8th Jul 2025282 PMAQI
8th Jul 2025293 PMAQI
8th Jul 2025284 PMAQI
8th Jul 2025285 PMAQI
8th Jul 2025306 PMAQI
8th Jul 2025297 PMAQI
8th Jul 2025288 PMAQI
8th Jul 2025259 PMAQI
8th Jul 20252510 PMAQI
8th Jul 20252711 PMAQI
9th Jul 20252612 AMAQI
9th Jul 2025261 AMAQI
9th Jul 2025242 AMAQI
9th Jul 2025243 AMAQI
9th Jul 2025264 AMAQI
22°C16/28°C
9th Jul 2025245 AMAQI
9th Jul 2025246 AMAQI
9th Jul 2025247 AMAQI
9th Jul 2025248 AMAQI
9th Jul 2025249 AMAQI
9th Jul 20252710 AMAQI
9th Jul 20252711 AMAQI
9th Jul 20252712 PMAQI
9th Jul 2025271 PMAQI
9th Jul 2025282 PMAQI
9th Jul 2025263 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 20252811 PMAQI
10th Jul 20252712 AMAQI
10th Jul 2025281 AMAQI
10th Jul 2025302 AMAQI
10th Jul 2025323 AMAQI
10th Jul 2025304 AMAQI
23°C17/30°C
10th Jul 2025295 AMAQI
10th Jul 2025306 AMAQI
10th Jul 2025317 AMAQI
10th Jul 2025328 AMAQI
10th Jul 2025319 AMAQI
10th Jul 20253210 AMAQI
10th Jul 20253411 AMAQI
10th Jul 20253312 PMAQI
10th Jul 2025341 PMAQI
10th Jul 2025352 PMAQI
10th Jul 2025373 PMAQI
10th Jul 2025374 PMAQI
10th Jul 2025365 PMAQI
10th Jul 2025346 PMAQI
10th Jul 2025367 PMAQI
10th Jul 2025368 PMAQI
10th Jul 2025339 PMAQI
10th Jul 20253210 PMAQI
10th Jul 20253511 PMAQI
11th Jul 20253212 AMAQI
11th Jul 2025351 AMAQI
11th Jul 2025342 AMAQI
11th Jul 2025343 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 20253610 AMAQI
11th Jul 20254011 AMAQI
11th Jul 20254112 PMAQI
11th Jul 2025431 PMAQI
11th Jul 2025452 PMAQI
11th Jul 2025423 PMAQI
11th Jul 2025404 PMAQI
11th Jul 2025395 PMAQI
11th Jul 2025386 PMAQI
11th Jul 2025387 PMAQI
11th Jul 2025398 PMAQI
11th Jul 2025379 PMAQI
11th Jul 20253610 PMAQI
11th Jul 20253711 PMAQI
12th Jul 20253812 AMAQI
12th Jul 2025411 AMAQI
12th Jul 2025462 AMAQI
12th Jul 2025503 AMAQI
12th Jul 2025524 AMAQI
24°C19/32°C
12th Jul 2025525 AMAQI
12th Jul 2025496 AMAQI
12th Jul 2025497 AMAQI
12th Jul 2025508 AMAQI
12th Jul 2025529 AMAQI
12th Jul 20255210 AMAQI
12th Jul 20255211 AMAQI
12th Jul 20254912 PMAQI
12th Jul 2025501 PMAQI
12th Jul 2025482 PMAQI
12th Jul 2025503 PMAQI
12th Jul 2025494 PMAQI
12th Jul 2025495 PMAQI
12th Jul 2025496 PMAQI
12th Jul 2025487 PMAQI
12th Jul 2025498 PMAQI
12th Jul 2025479 PMAQI
12th Jul 20254810 PMAQI
12th Jul 20254611 PMAQI
13th Jul 20254512 AMAQI
13th Jul 2025481 AMAQI
13th Jul 2025462 AMAQI
13th Jul 2025433 AMAQI
13th Jul 2025454 AMAQI
27°C19/36°C
13th Jul 2025435 AMAQI
13th Jul 2025486 AMAQI
13th Jul 2025417 AMAQI
13th Jul 2025438 AMAQI
13th Jul 2025439 AMAQI
13th Jul 20254210 AMAQI
13th Jul 20254111 AMAQI
13th Jul 20254312 PMAQI
13th Jul 2025431 PMAQI
13th Jul 2025422 PMAQI
13th Jul 2025423 PMAQI
13th Jul 2025454 PMAQI
13th Jul 2025425 PMAQI
13th Jul 2025426 PMAQI
13th Jul 2025427 PMAQI
13th Jul 2025418 PMAQI
13th Jul 2025429 PMAQI
13th Jul 20254310 PMAQI
13th Jul 20253911 PMAQI
14th Jul 20254012 AMAQI
14th Jul 2025391 AMAQI
14th Jul 2025282 AMAQI
14th Jul 2025283 AMAQI
14th Jul 2025304 AMAQI
25°C22/29°C
14th Jul 2025365 AMAQI
14th Jul 2025556 AMAQI
14th Jul 2025517 AMAQI
14th Jul 2025508 AMAQI
14th Jul 2025549 AMAQI
14th Jul 20255310 AMAQI
14th Jul 20255511 AMAQI
14th Jul 20255412 PMAQI
14th Jul 2025541 PMAQI
14th Jul 2025562 PMAQI
14th Jul 2025543 PMAQI
14th Jul 2025504 PMAQI
14th Jul 2025485 PMAQI
14th Jul 2025496 PMAQI
14th Jul 2025507 PMAQI
14th Jul 2025498 PMAQI
14th Jul 2025479 PMAQI
14th Jul 20254810 PMAQI
14th Jul 20254611 PMAQI
15th Jul 20254812 AMAQI
15th Jul 2025471 AMAQI
15th Jul 2025432 AMAQI
15th Jul 2025283 AMAQI
15th Jul 2025284 AMAQI
26°C20/32°C
15th Jul 2025355 AMAQI
15th Jul 2025356 AMAQI
15th Jul 2025407 AMAQI
15th Jul 2025458 AMAQI
15th Jul 2025589 AMAQI
15th Jul 20255710 AMAQI
15th Jul 20256011 AMAQI
15th Jul 20256012 PMAQI
15th Jul 2025461 PMAQI
15th Jul 2025502 PMAQI
15th Jul 2025503 PMAQI
15th Jul 2025504 PMAQI
15th Jul 2025505 PMAQI
15th Jul 2025506 PMAQI
15th Jul 2025507 PMAQI
15th Jul 2025508 PMAQI
15th Jul 2025509 PMAQI
15th Jul 20254710 PMAQI
15th Jul 20254711 PMAQI
16th Jul 20254612 AMAQI
16th Jul 2025461 AMAQI
16th Jul 2025442 AMAQI
16th Jul 2025443 AMAQI
16th Jul 2025524 AMAQI
26°C18/34°C
16th Jul 2025525 AMAQI
16th Jul 2025506 AMAQI
16th Jul 2025527 AMAQI
16th Jul 2025568 AMAQI
16th Jul 2025669 AMAQI
16th Jul 20256210 AMAQI
16th Jul 20256011 AMAQI
16th Jul 20256012 PMAQI
16th Jul 2025581 PMAQI
16th Jul 2025642 PMAQI
16th Jul 2025643 PMAQI
16th Jul 2025604 PMAQI
16th Jul 2025555 PMAQI
16th Jul 2025566 PMAQI
16th Jul 2025567 PMAQI
16th Jul 2025588 PMAQI
16th Jul 2025569 PMAQI
16th Jul 20255410 PMAQI
16th Jul 20255411 PMAQI
17th Jul 20255412 AMAQI
17th Jul 2025541 AMAQI
17th Jul 2025592 AMAQI
17th Jul 2025663 AMAQI
17th Jul 2025654 AMAQI
28°C19/35°C
17th Jul 2025625 AMAQI
17th Jul 2025636 AMAQI
17th Jul 2025587 AMAQI
17th Jul 2025468 AMAQI
17th Jul 2025489 AMAQI
17th Jul 20254410 AMAQI
17th Jul 20254411 AMAQI
17th Jul 20254512 PMAQI
17th Jul 2025481 PMAQI
17th Jul 2025482 PMAQI
17th Jul 2025483 PMAQI
17th Jul 2025494 PMAQI
17th Jul 2025505 PMAQI
17th Jul 2025526 PMAQI
17th Jul 2025507 PMAQI
17th Jul 2025498 PMAQI
17th Jul 2025519 PMAQI
17th Jul 20255110 PMAQI
17th Jul 20254511 PMAQI
18th Jul 20254512 AMAQI
18th Jul 2025421 AMAQI
18th Jul 2025192 AMAQI
18th Jul 2025193 AMAQI
18th Jul 2025204 AMAQI
24°C18/30°C
18th Jul 2025195 AMAQI
18th Jul 2025196 AMAQI
18th Jul 2025197 AMAQI
18th Jul 2025188 AMAQI
18th Jul 2025189 AMAQI
18th Jul 20251810 AMAQI
18th Jul 20251911 AMAQI
18th Jul 20251912 PMAQI
18th Jul 2025191 PMAQI
18th Jul 2025202 PMAQI
18th Jul 2025223 PMAQI
18th Jul 2025234 PMAQI
18th Jul 2025225 PMAQI
18th Jul 2025226 PMAQI
18th Jul 2025227 PMAQI
18th Jul 2025228 PMAQI
18th Jul 2025209 PMAQI
18th Jul 20252110 PMAQI
18th Jul 20252211 PMAQI
19th Jul 20252312 AMAQI
19th Jul 2025241 AMAQI
19th Jul 2025232 AMAQI
19th Jul 2025243 AMAQI
19th Jul 2025224 AMAQI
20°C12/29°C
19th Jul 2025245 AMAQI
19th Jul 2025246 AMAQI
19th Jul 2025257 AMAQI
19th Jul 2025268 AMAQI
19th Jul 2025259 AMAQI
19th Jul 20252610 AMAQI
19th Jul 20252911 AMAQI
19th Jul 20253612 PMAQI
19th Jul 2025441 PMAQI
19th Jul 2025422 PMAQI
19th Jul 2025413 PMAQI
19th Jul 2025404 PMAQI
19th Jul 2025345 PMAQI
19th Jul 2025366 PMAQI
19th Jul 2025347 PMAQI
19th Jul 2025368 PMAQI
19th Jul 2025349 PMAQI
19th Jul 20253110 PMAQI
19th Jul 20253411 PMAQI
20th Jul 20253612 AMAQI
20th Jul 2025341 AMAQI
20th Jul 2025302 AMAQI
20th Jul 2025283 AMAQI
20th Jul 2025274 AMAQI
22°C16/29°C
20th Jul 2025285 AMAQI
20th Jul 2025276 AMAQI
20th Jul 2025287 AMAQI
20th Jul 2025288 AMAQI
20th Jul 2025299 AMAQI
20th Jul 20253010 AMAQI
20th Jul 20252911 AMAQI
20th Jul 20252712 PMAQI
20th Jul 2025271 PMAQI
20th Jul 2025262 PMAQI
20th Jul 2025253 PMAQI
20th Jul 2025284 PMAQI
20th Jul 2025315 PMAQI
20th Jul 2025336 PMAQI
20th Jul 2025337 PMAQI
20th Jul 2025368 PMAQI
20th Jul 2025329 PMAQI
20th Jul 20253110 PMAQI
20th Jul 20253211 PMAQI
21st Jul 20253212 AMAQI
21st Jul 2025321 AMAQI
21st Jul 2025412 AMAQI
21st Jul 2025553 AMAQI
21st Jul 2025414 AMAQI
22°C18/29°C
21st Jul 2025285 AMAQI
21st Jul 2025246 AMAQI
21st Jul 2025227 AMAQI
21st Jul 2025238 AMAQI
21st Jul 2025259 AMAQI
21st Jul 20252210 AMAQI
21st Jul 20252411 AMAQI
21st Jul 20252312 PMAQI
21st Jul 2025221 PMAQI
21st Jul 2025222 PMAQI
21st Jul 2025213 PMAQI
21st Jul 2025244 PMAQI
21st Jul 2025255 PMAQI
21st Jul 2025256 PMAQI
21st Jul 2025247 PMAQI
21st Jul 2025238 PMAQI
21st Jul 2025259 PMAQI
21st Jul 20252610 PMAQI
21st Jul 20252411 PMAQI
22nd Jul 20252312 AMAQI
22nd Jul 2025241 AMAQI
22nd Jul 2025202 AMAQI
22nd Jul 2025173 AMAQI
22nd Jul 2025164 AMAQI
18°C14/21°C
22nd Jul 2025175 AMAQI
22nd Jul 2025166 AMAQI
22nd Jul 2025167 AMAQI
22nd Jul 2025168 AMAQI
22nd Jul 2025169 AMAQI
22nd Jul 20251810 AMAQI
22nd Jul 20251811 AMAQI
22nd Jul 20251712 PMAQI
22nd Jul 2025181 PMAQI
22nd Jul 2025192 PMAQI
22nd Jul 2025173 PMAQI
22nd Jul 2025174 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 20251812 AMAQI
23rd Jul 2025191 AMAQI
23rd Jul 2025212 AMAQI
23rd Jul 2025213 AMAQI
23rd Jul 2025224 AMAQI
19°C10/26°C
23rd Jul 2025235 AMAQI
23rd Jul 2025226 AMAQI
23rd Jul 2025237 AMAQI
23rd Jul 2025248 AMAQI
23rd Jul 2025469 AMAQI
23rd Jul 20253110 AMAQI
23rd Jul 20252811 AMAQI
23rd Jul 20252612 PMAQI
23rd Jul 2025221 PMAQI
23rd Jul 2025242 PMAQI
23rd Jul 2025203 PMAQI
23rd Jul 2025184 PMAQI
23rd Jul 2025205 PMAQI
23rd Jul 2025236 PMAQI
23rd Jul 2025227 PMAQI
23rd Jul 2025238 PMAQI
23rd Jul 2025229 PMAQI
23rd Jul 20252210 PMAQI
23rd Jul 20252411 PMAQI
24th Jul 20252312 AMAQI
24th Jul 2025241 AMAQI
24th Jul 2025242 AMAQI
24th Jul 2025223 AMAQI
24th Jul 2025184 AMAQI
21°C14/27°C
24th Jul 2025185 AMAQI
24th Jul 2025206 AMAQI
24th Jul 2025227 AMAQI
24th Jul 2025238 AMAQI
24th Jul 2025249 AMAQI
24th Jul 20252810 AMAQI
24th Jul 20252811 AMAQI
24th Jul 20252612 PMAQI
24th Jul 2025281 PMAQI
24th Jul 2025332 PMAQI
24th Jul 2025293 PMAQI
24th Jul 2025324 PMAQI
24th Jul 2025335 PMAQI
24th Jul 2025326 PMAQI
24th Jul 2025347 PMAQI
24th Jul 2025338 PMAQI
24th Jul 2025269 PMAQI
24th Jul 20252710 PMAQI
24th Jul 20253211 PMAQI
25th Jul 20253212 AMAQI
25th Jul 2025311 AMAQI
25th Jul 2025322 AMAQI
25th Jul 2025323 AMAQI
25th Jul 2025274 AMAQI
26°C16/35°C
25th Jul 2025275 AMAQI
25th Jul 2025266 AMAQI
25th Jul 2025267 AMAQI
25th Jul 2025278 AMAQI
25th Jul 2025259 AMAQI
25th Jul 20252710 AMAQI
25th Jul 20253011 AMAQI
25th Jul 20252412 PMAQI
25th Jul 2025281 PMAQI
25th Jul 2025322 PMAQI
25th Jul 2025503 PMAQI
25th Jul 2025414 PMAQI
25th Jul 2025315 PMAQI
25th Jul 2025326 PMAQI
25th Jul 2025317 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 2025483 AMAQI
26th Jul 2025504 AMAQI
26°C22/31°C
26th Jul 2025535 AMAQI
26th Jul 2025546 AMAQI
26th Jul 2025587 AMAQI
26th Jul 2025578 AMAQI
26th Jul 2025589 AMAQI
26th Jul 20255810 AMAQI
26th Jul 20255511 AMAQI
26th Jul 20254912 PMAQI
26th Jul 2025521 PMAQI
26th Jul 2025502 PMAQI
26th Jul 2025583 PMAQI
26th Jul 2025564 PMAQI
26th Jul 2025525 PMAQI
26th Jul 2025536 PMAQI
26th Jul 2025527 PMAQI
26th Jul 2025528 PMAQI
26th Jul 2025529 PMAQI
26th Jul 20255310 PMAQI
26th Jul 20255111 PMAQI
27th Jul 20255312 AMAQI
27th Jul 2025531 AMAQI
27th Jul 2025582 AMAQI
27th Jul 2025603 AMAQI
27th Jul 2025584 AMAQI
25°C18/33°C
27th Jul 2025585 AMAQI
27th Jul 2025606 AMAQI
27th Jul 2025607 AMAQI
27th Jul 2025628 AMAQI
27th Jul 2025629 AMAQI
27th Jul 20256110 AMAQI
27th Jul 20256111 AMAQI
27th Jul 20255812 PMAQI
27th Jul 2025571 PMAQI
27th Jul 2025562 PMAQI
27th Jul 2025553 PMAQI
27th Jul 2025564 PMAQI
27th Jul 2025585 PMAQI
27th Jul 2025586 PMAQI
27th Jul 2025587 PMAQI
27th Jul 2025578 PMAQI
27th Jul 2025579 PMAQI
27th Jul 20255710 PMAQI
27th Jul 20255611 PMAQI
28th Jul 20255712 AMAQI
28th Jul 2025561 AMAQI
28th Jul 2025582 AMAQI
28th Jul 2025583 AMAQI
28th Jul 2025614 AMAQI
26°C20/34°C
28th Jul 2025605 AMAQI
28th Jul 2025626 AMAQI
28th Jul 2025627 AMAQI
28th Jul 2025618 AMAQI
28th Jul 2025609 AMAQI
28th Jul 20256010 AMAQI
28th Jul 20256111 AMAQI
28th Jul 20256212 PMAQI
28th Jul 2025641 PMAQI
28th Jul 2025642 PMAQI
28th Jul 2025643 PMAQI
28th Jul 2025624 PMAQI
28th Jul 2025605 PMAQI
28th Jul 2025626 PMAQI
28th Jul 2025607 PMAQI
28th Jul 2025608 PMAQI
28th Jul 2025609 PMAQI
28th Jul 20255910 PMAQI
28th Jul 20255811 PMAQI
29th Jul 20255912 AMAQI
29th Jul 2025581 AMAQI
29th Jul 2025582 AMAQI
29th Jul 2025553 AMAQI
29th Jul 2025544 AMAQI
28°C20/37°C
29th Jul 2025485 AMAQI
29th Jul 2025336 AMAQI
29th Jul 2025287 AMAQI
29th Jul 2025318 AMAQI
29th Jul 2025359 AMAQI
29th Jul 20253710 AMAQI
29th Jul 20253711 AMAQI
29th Jul 20253712 PMAQI
29th Jul 2025421 PMAQI
29th Jul 2025422 PMAQI
29th Jul 2025443 PMAQI
29th Jul 2025484 PMAQI
29th Jul 2025525 PMAQI
29th Jul 2025536 PMAQI
29th Jul 2025527 PMAQI
29th Jul 2025558 PMAQI
29th Jul 2025549 PMAQI
29th Jul 20255310 PMAQI
29th Jul 20255211 PMAQI
30th Jul 20255112 AMAQI
30th Jul 2025481 AMAQI
30th Jul 2025492 AMAQI
30th Jul 2025603 AMAQI
30th Jul 2025634 AMAQI
25°C22/31°C
30th Jul 2025625 AMAQI
30th Jul 2025656 AMAQI
30th Jul 2025657 AMAQI
30th Jul 2025638 AMAQI
30th Jul 2025639 AMAQI
30th Jul 20256510 AMAQI
30th Jul 20256811 AMAQI
30th Jul 20256612 PMAQI
30th Jul 2025661 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 2025621 AMAQI
31st Jul 2025602 AMAQI
31st Jul 2025613 AMAQI
31st Jul 2025604 AMAQI
24°C19/30°C
31st Jul 2025685 AMAQI
31st Jul 2025656 AMAQI
31st Jul 2025607 AMAQI
31st Jul 2025668 AMAQI
31st Jul 2025769 AMAQI
31st Jul 20256810 AMAQI
31st Jul 20255911 AMAQI
31st Jul 20254912 PMAQI
31st Jul 2025411 PMAQI
31st Jul 2025342 PMAQI
31st Jul 2025313 PMAQI
31st Jul 2025304 PMAQI
31st Jul 2025325 PMAQI
31st Jul 2025306 PMAQI
31st Jul 2025277 PMAQI
31st Jul 2025288 PMAQI
31st Jul 2025729 PMAQI
31st Jul 20255010 PMAQI
31st Jul 20252811 PMAQI
1st Aug 20252712 AMAQI
1st Aug 2025281 AMAQI
1st Aug 2025362 AMAQI
1st Aug 2025293 AMAQI
1st Aug 2025254 AMAQI
21°C16/25°C
1st Aug 2025235 AMAQI
1st Aug 2025206 AMAQI
1st Aug 2025207 AMAQI
1st Aug 2025188 AMAQI
1st Aug 2025179 AMAQI
1st Aug 20251810 AMAQI
1st Aug 20251711 AMAQI
1st Aug 20251712 PMAQI
1st Aug 2025171 PMAQI
1st Aug 2025182 PMAQI
1st Aug 2025173 PMAQI
1st Aug 2025164 PMAQI
1st Aug 2025165 PMAQI
1st Aug 2025176 PMAQI
1st Aug 2025167 PMAQI
1st Aug 2025168 PMAQI
1st Aug 2025189 PMAQI
1st Aug 20251910 PMAQI
1st Aug 20252011 PMAQI
2nd Aug 20252112 AMAQI
2nd Aug 2025231 AMAQI
2nd Aug 2025252 AMAQI
2nd Aug 2025263 AMAQI
2nd Aug 2025244 AMAQI
19°C12/26°C
2nd Aug 2025315 AMAQI
2nd Aug 2025296 AMAQI
2nd Aug 2025257 AMAQI
2nd Aug 2025248 AMAQI
2nd Aug 2025239 AMAQI
2nd Aug 20252310 AMAQI
2nd Aug 20252411 AMAQI
2nd Aug 20253612 PMAQI
2nd Aug 2025541 PMAQI
2nd Aug 2025622 PMAQI
2nd Aug 2025623 PMAQI
2nd Aug 2025584 PMAQI
2nd Aug 2025655 PMAQI
2nd Aug 2025626 PMAQI
2nd Aug 2025517 PMAQI
2nd Aug 2025368 PMAQI
2nd Aug 2025299 PMAQI
2nd Aug 20253410 PMAQI
2nd Aug 20254211 PMAQI
3rd Aug 20254712 AMAQI
3rd Aug 2025431 AMAQI
3rd Aug 2025472 AMAQI
21°C12/31°C
5 AM
12 PM
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
9 AM - 8 PM
39AQI
12 hours / Day
360 hours / Month
Avg. Lowest Time
5 AM - 8 AM
37AQI
4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 AM to 8 PM (Avg. 39), while the lowest AQI was between 5 AM to 8 AM (Avg. 37).
Night time
Avg. Highest Time
9 PM - 11 PM
39AQI
3 hours / Day
90 hours / Month
Avg. Lowest Time
12 AM - 4 AM
38AQI
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. 39), while the lowest AQI was between 12 AM to 4 AM (Avg. 38).
2025 Days Vs Air Quality
Ottawa Downtown, Ottawa, Ontario, Canada
2025
91%
194
9%
19
Total number of days with different AQI categories in last 215 days in 2025 (150 days remaining)
Good
194 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 215 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 Downtown, 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
20AQI
20AQI
2nd January 2025
22AQI
22AQI
3rd January 2025
22AQI
22AQI
4th January 2025
24AQI
24AQI
5th January 2025
23AQI
23AQI
6th January 2025
21AQI
21AQI
7th January 2025
23AQI
23AQI
8th January 2025
22AQI
22AQI
9th January 2025
25AQI
25AQI
10th January 2025
31AQI
31AQI
11th January 2025
36AQI
36AQI
12th January 2025
30AQI
30AQI
13th January 2025
49AQI
49AQI
14th January 2025
20AQI
20AQI
15th January 2025
21AQI
21AQI
16th January 2025
33AQI
33AQI
17th January 2025
51AQI
51AQI
18th January 2025
29AQI
29AQI
19th January 2025
21AQI
21AQI
20th January 2025
24AQI
24AQI
21st January 2025
35AQI
35AQI
22nd January 2025
40AQI
40AQI
23rd January 2025
36AQI
36AQI
24th January 2025
33AQI
33AQI
25th January 2025
54AQI
54AQI
26th January 2025
34AQI
34AQI
27th January 2025
23AQI
23AQI
28th January 2025
27AQI
27AQI
29th January 2025
23AQI
23AQI
30th January 2025
23AQI
23AQI
31st January 2025
31AQI
31AQI
1st February 2025
24AQI
24AQI
2nd February 2025
43AQI
43AQI
3rd February 2025
52AQI
52AQI
4th February 2025
21AQI
21AQI
5th February 2025
23AQI
23AQI
6th February 2025
33AQI
33AQI
7th February 2025
27AQI
27AQI
8th February 2025
23AQI
23AQI
9th February 2025
24AQI
24AQI
10th February 2025
22AQI
22AQI
11th February 2025
27AQI
27AQI
12th February 2025
27AQI
27AQI
13th February 2025
22AQI
22AQI
14th February 2025
22AQI
22AQI
15th February 2025
23AQI
23AQI
16th February 2025
23AQI
23AQI
17th February 2025
22AQI
22AQI
18th February 2025
20AQI
20AQI
19th February 2025
19AQI
19AQI
20th February 2025
22AQI
22AQI
21st February 2025
27AQI
27AQI
22nd February 2025
29AQI
29AQI
23rd February 2025
45AQI
45AQI
24th February 2025
45AQI
45AQI
25th February 2025
57AQI
57AQI
26th February 2025
30AQI
30AQI
27th February 2025
28AQI
28AQI
28th February 2025
29AQI
29AQI
1st March 2025
27AQI
27AQI
2nd March 2025
25AQI
25AQI
3rd March 2025
44AQI
44AQI
4th March 2025
37AQI
37AQI
5th March 2025
49AQI
49AQI
6th March 2025
26AQI
26AQI
7th March 2025
29AQI
29AQI
8th March 2025
31AQI
31AQI
9th March 2025
29AQI
29AQI
10th March 2025
26AQI
26AQI
11th March 2025
35AQI
35AQI
12th March 2025
27AQI
27AQI
13th March 2025
31AQI
31AQI
14th March 2025
59AQI
59AQI
15th March 2025
57AQI
57AQI
16th March 2025
41AQI
41AQI
17th March 2025
16AQI
16AQI
18th March 2025
24AQI
24AQI
19th March 2025
27AQI
27AQI
20th March 2025
29AQI
29AQI
21st March 2025
17AQI
17AQI
22nd March 2025
20AQI
20AQI
23rd March 2025
18AQI
18AQI
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
18AQI
18AQI
3rd April 2025
22AQI
22AQI
4th April 2025
17AQI
17AQI
5th April 2025
20AQI
20AQI
6th April 2025
17AQI
17AQI
7th April 2025
20AQI
20AQI
8th April 2025
17AQI
17AQI
9th April 2025
16AQI
16AQI
10th April 2025
24AQI
24AQI
11th April 2025
32AQI
32AQI
12th April 2025
26AQI
26AQI
13th April 2025
27AQI
27AQI
14th April 2025
26AQI
26AQI
15th April 2025
22AQI
22AQI
16th April 2025
15AQI
15AQI
17th April 2025
16AQI
16AQI
18th April 2025
28AQI
28AQI
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
17AQI
17AQI
25th April 2025
20AQI
20AQI
26th April 2025
15AQI
15AQI
27th April 2025
12AQI
12AQI
28th April 2025
16AQI
16AQI
29th April 2025
25AQI
25AQI
30th April 2025
14AQI
14AQI
1st May 2025
21AQI
21AQI
2nd May 2025
22AQI
22AQI
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
18AQI
18AQI
13th May 2025
27AQI
27AQI
14th May 2025
29AQI
29AQI
15th May 2025
26AQI
26AQI
16th May 2025
32AQI
32AQI
17th May 2025
33AQI
33AQI
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
13AQI
13AQI
25th May 2025
15AQI
15AQI
26th May 2025
20AQI
20AQI
27th May 2025
21AQI
21AQI
28th May 2025
25AQI
25AQI
29th May 2025
20AQI
20AQI
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
59AQI
59AQI
8th June 2025
57AQI
57AQI
9th June 2025
58AQI
58AQI
10th June 2025
39AQI
39AQI
11th June 2025
51AQI
51AQI
12th June 2025
53AQI
53AQI
13th June 2025
24AQI
24AQI
14th June 2025
24AQI
24AQI
15th June 2025
28AQI
28AQI
16th June 2025
36AQI
36AQI
17th June 2025
29AQI
29AQI
18th June 2025
29AQI
29AQI
19th June 2025
33AQI
33AQI
20th June 2025
19AQI
19AQI
21st June 2025
25AQI
25AQI
22nd June 2025
26AQI
26AQI
23rd June 2025
42AQI
42AQI
24th June 2025
51AQI
51AQI
25th June 2025
41AQI
41AQI
26th June 2025
25AQI
25AQI
27th June 2025
25AQI
25AQI
28th June 2025
28AQI
28AQI
29th June 2025
20AQI
20AQI
30th June 2025
29AQI
29AQI
1st July 2025
34AQI
34AQI
2nd July 2025
33AQI
33AQI
3rd July 2025
42AQI
42AQI
4th July 2025
24AQI
24AQI
5th July 2025
28AQI
28AQI
6th July 2025
47AQI
47AQI
7th July 2025
45AQI
45AQI
8th July 2025
26AQI
26AQI
9th July 2025
26AQI
26AQI
10th July 2025
33AQI
33AQI
11th July 2025
37AQI
37AQI
12th July 2025
48AQI
48AQI
13th July 2025
43AQI
43AQI
14th July 2025
46AQI
46AQI
15th July 2025
46AQI
46AQI
16th July 2025
55AQI
55AQI
17th July 2025
53AQI
53AQI
18th July 2025
22AQI
22AQI
19th July 2025
30AQI
30AQI
20th July 2025
30AQI
30AQI
21st July 2025
28AQI
28AQI
22nd July 2025
18AQI
18AQI
23rd July 2025
23AQI
23AQI
24th July 2025
27AQI
27AQI
25th July 2025
31AQI
31AQI
26th July 2025
51AQI
51AQI
27th July 2025
58AQI
58AQI
28th July 2025
60AQI
60AQI
29th July 2025
48AQI
48AQI
30th July 2025
62AQI
62AQI
31st July 2025
50AQI
50AQI
1st August 2025
20AQI
20AQI
29AQI
29AQI
29AQI
20AQI
19AQI
35AQI
39AQI
20AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202528AQI
29
2
26
2
29
2
30
31
23
7
25
6
1
194
19
Highest AQI recorded in
July39AQI
Lowest AQI recorded in
May19AQI
202430AQI
30
1
22
7
30
1
30
31
27
2
28
3
21
10
28
2
31
30
29
2
337
28
Highest AQI recorded in
February37AQI
Lowest AQI recorded in
November23AQI
202338AQI
30
1
22
6
30
1
30
30
1
14
9
2
3
2
19
11
1
25
6
23
7
29
2
27
2
25
6
304
52
3
3
2
Highest AQI recorded in
June78AQI
Lowest AQI recorded in
January27AQI
202230AQI
23
8
20
2
31
17
31
30
22
1
29
30
1
29
1
30
1
293
13
Highest AQI recorded in
January39AQI
Lowest AQI recorded in
August16AQI
202130AQI
24
6
25
3
27
4
30
27
30
26
5
26
5
30
31
29
1
28
3
333
27
Highest AQI recorded in
August35AQI
Lowest AQI recorded in
September20AQI
202028AQI
13
21
18
30
31
31
30
31
24
6
28
3
257
9
Highest AQI recorded in
November36AQI
Lowest AQI recorded in
August21AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
38AQILeast Polluted Year Recorded
2020(Avg.)
28AQIOttawa Downtown's annual 2025 AQI (28) shows an average percentage change of -7.2% (improved AQI) compared to previous years: 2020 (28), 2021 (30), 2022 (30), 2023 (38), 2024 (30).
