Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

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
76AQI
Lowest AQI recorded on
9th Aug 2024
14AQI

Same Day Analysis (13th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 48 of Good air quality on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 13th Aug - 14th Aug 2025

Ottawa, Ontario, Canada

AQI
Day
Night
.

5 AM13th Aug 2025

8 PM

4 AM14th Aug 2025

Day time
Avg. Highest Time
6AM13th Aug

55AQI

Avg. Lowest Time
6PM13th Aug

32AQI

Night time
Avg. Highest Time
5AM13th Aug

52AQI

Avg. Lowest Time
3AM14th Aug

38AQI

In the last 24 hours,

Ottawa's AQI reached its highest point of 55 at 6 AM during the Day, while the lowest point, 32, was recorded at 6 PM during the Day between 13th Aug and 14th Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Ottawa, Ontario, Canada

JulAug
15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th
Day
Night
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

--°C/°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
2nd Aug 2025296 AMAQI
2nd Aug 2025267 AMAQI
2nd Aug 2025258 AMAQI
2nd Aug 2025249 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 2025309 PMAQI
2nd Aug 20253310 PMAQI
2nd Aug 20254211 PMAQI
3rd Aug 20254712 AMAQI
3rd Aug 2025431 AMAQI
3rd Aug 2025512 AMAQI
3rd Aug 2025643 AMAQI
3rd Aug 2025534 AMAQI

21°C12/31°C

3rd Aug 2025485 AMAQI
3rd Aug 2025526 AMAQI
3rd Aug 2025517 AMAQI
3rd Aug 2025468 AMAQI
3rd Aug 2025539 AMAQI
3rd Aug 20255810 AMAQI
3rd Aug 20256211 AMAQI
3rd Aug 20256512 PMAQI
3rd Aug 2025691 PMAQI
3rd Aug 2025682 PMAQI
3rd Aug 2025673 PMAQI
3rd Aug 2025684 PMAQI
3rd Aug 2025745 PMAQI
3rd Aug 2025786 PMAQI
3rd Aug 2025667 PMAQI
3rd Aug 2025768 PMAQI
3rd Aug 2025549 PMAQI
3rd Aug 20256410 PMAQI
3rd Aug 20256511 PMAQI
4th Aug 20256212 AMAQI
4th Aug 2025621 AMAQI
4th Aug 2025602 AMAQI
4th Aug 2025583 AMAQI
4th Aug 2025554 AMAQI

24°C15/30°C

4th Aug 2025635 AMAQI
4th Aug 2025656 AMAQI
4th Aug 2025647 AMAQI
4th Aug 2025678 AMAQI
4th Aug 2025689 AMAQI
4th Aug 20257610 AMAQI
4th Aug 20258011 AMAQI
4th Aug 20259512 PMAQI
4th Aug 20251071 PMAQI
4th Aug 20251142 PMAQI
4th Aug 20251083 PMAQI
4th Aug 2025994 PMAQI
4th Aug 2025885 PMAQI
4th Aug 2025796 PMAQI
4th Aug 2025697 PMAQI
4th Aug 2025598 PMAQI
4th Aug 2025749 PMAQI
4th Aug 20256610 PMAQI
4th Aug 20255511 PMAQI
5th Aug 20255412 AMAQI
5th Aug 2025511 AMAQI
5th Aug 2025492 AMAQI
5th Aug 2025473 AMAQI
5th Aug 2025424 AMAQI

23°C18/30°C

5th Aug 2025405 AMAQI
5th Aug 2025376 AMAQI
5th Aug 2025357 AMAQI
5th Aug 2025318 AMAQI
5th Aug 2025299 AMAQI
5th Aug 20252710 AMAQI
5th Aug 20252811 AMAQI
5th Aug 20253012 PMAQI
5th Aug 2025281 PMAQI
5th Aug 2025282 PMAQI
5th Aug 2025283 PMAQI
5th Aug 2025254 PMAQI
5th Aug 2025265 PMAQI
5th Aug 2025276 PMAQI
5th Aug 2025287 PMAQI
5th Aug 2025268 PMAQI
5th Aug 2025309 PMAQI
5th Aug 20252810 PMAQI
5th Aug 20252911 PMAQI
6th Aug 20252912 AMAQI
6th Aug 2025311 AMAQI
6th Aug 2025292 AMAQI
6th Aug 2025313 AMAQI
6th Aug 2025294 AMAQI

22°C16/30°C

6th Aug 2025295 AMAQI
6th Aug 2025276 AMAQI
6th Aug 2025277 AMAQI
6th Aug 2025278 AMAQI
6th Aug 2025269 AMAQI
6th Aug 20252810 AMAQI
6th Aug 20252811 AMAQI
6th Aug 20252812 PMAQI
6th Aug 2025271 PMAQI
6th Aug 2025272 PMAQI
6th Aug 2025283 PMAQI
6th Aug 2025274 PMAQI
6th Aug 2025265 PMAQI
6th Aug 2025266 PMAQI
6th Aug 2025297 PMAQI
6th Aug 2025288 PMAQI
6th Aug 2025289 PMAQI
6th Aug 20253110 PMAQI
6th Aug 20253811 PMAQI
7th Aug 20253612 AMAQI
7th Aug 2025361 AMAQI
7th Aug 2025332 AMAQI
7th Aug 2025313 AMAQI
7th Aug 2025304 AMAQI

23°C15/30°C

7th Aug 2025295 AMAQI
7th Aug 2025296 AMAQI
7th Aug 2025327 AMAQI
7th Aug 2025308 AMAQI
7th Aug 2025309 AMAQI
7th Aug 20253210 AMAQI
7th Aug 20253411 AMAQI
7th Aug 20253912 PMAQI
7th Aug 2025471 PMAQI
7th Aug 2025512 PMAQI
7th Aug 2025533 PMAQI
7th Aug 2025514 PMAQI
7th Aug 2025465 PMAQI
7th Aug 2025446 PMAQI
7th Aug 2025477 PMAQI
7th Aug 2025468 PMAQI
7th Aug 2025389 PMAQI
7th Aug 20254010 PMAQI
7th Aug 20253911 PMAQI
8th Aug 20254012 AMAQI
8th Aug 2025411 AMAQI
8th Aug 2025442 AMAQI
8th Aug 2025543 AMAQI
8th Aug 2025524 AMAQI

24°C16/33°C

8th Aug 2025585 AMAQI
8th Aug 2025596 AMAQI
8th Aug 2025607 AMAQI
8th Aug 2025638 AMAQI
8th Aug 2025669 AMAQI
8th Aug 20256610 AMAQI
8th Aug 20256411 AMAQI
8th Aug 20256112 PMAQI
8th Aug 2025561 PMAQI
8th Aug 2025542 PMAQI
8th Aug 2025543 PMAQI
8th Aug 2025564 PMAQI
8th Aug 2025565 PMAQI
8th Aug 2025566 PMAQI
8th Aug 2025567 PMAQI
8th Aug 2025568 PMAQI
8th Aug 2025569 PMAQI
8th Aug 20255610 PMAQI
8th Aug 20255511 PMAQI
9th Aug 20255512 AMAQI
9th Aug 2025561 AMAQI
9th Aug 2025562 AMAQI
9th Aug 2025593 AMAQI
9th Aug 2025614 AMAQI

25°C16/34°C

9th Aug 2025605 AMAQI
9th Aug 2025626 AMAQI
9th Aug 2025597 AMAQI
9th Aug 2025628 AMAQI
9th Aug 2025639 AMAQI
9th Aug 20256510 AMAQI
9th Aug 20256311 AMAQI
9th Aug 20256612 PMAQI
9th Aug 2025651 PMAQI
9th Aug 2025632 PMAQI
9th Aug 2025633 PMAQI
9th Aug 2025634 PMAQI
9th Aug 2025615 PMAQI
9th Aug 2025606 PMAQI
9th Aug 2025607 PMAQI
9th Aug 2025618 PMAQI
9th Aug 2025599 PMAQI
9th Aug 20255810 PMAQI
9th Aug 20255911 PMAQI
10th Aug 20256212 AMAQI
10th Aug 2025621 AMAQI
10th Aug 2025642 AMAQI
10th Aug 2025663 AMAQI
10th Aug 2025674 AMAQI

25°C18/32°C

10th Aug 2025675 AMAQI
10th Aug 2025676 AMAQI
10th Aug 2025667 AMAQI
10th Aug 2025668 AMAQI
10th Aug 2025669 AMAQI
10th Aug 20256610 AMAQI
10th Aug 20256411 AMAQI
10th Aug 20256412 PMAQI
10th Aug 2025621 PMAQI
10th Aug 2025622 PMAQI
10th Aug 2025603 PMAQI
10th Aug 2025614 PMAQI
10th Aug 2025625 PMAQI
10th Aug 2025626 PMAQI
10th Aug 2025627 PMAQI
10th Aug 2025628 PMAQI
10th Aug 2025629 PMAQI
10th Aug 20256010 PMAQI
10th Aug 20256011 PMAQI
11th Aug 20256112 AMAQI
11th Aug 2025611 AMAQI
11th Aug 2025582 AMAQI
11th Aug 2025553 AMAQI
11th Aug 2025534 AMAQI

28°C22/36°C

11th Aug 2025535 AMAQI
11th Aug 2025526 AMAQI
11th Aug 2025527 AMAQI
11th Aug 2025538 AMAQI
11th Aug 2025569 AMAQI
11th Aug 20255710 AMAQI
11th Aug 20255711 AMAQI
11th Aug 20255712 PMAQI
11th Aug 2025571 PMAQI
11th Aug 2025572 PMAQI
11th Aug 2025573 PMAQI
11th Aug 2025564 PMAQI
11th Aug 2025565 PMAQI
11th Aug 2025556 PMAQI
11th Aug 2025557 PMAQI
11th Aug 2025548 PMAQI
11th Aug 2025579 PMAQI
11th Aug 20255510 PMAQI
11th Aug 20255211 PMAQI
12th Aug 20255312 AMAQI
12th Aug 2025511 AMAQI
12th Aug 2025512 AMAQI
12th Aug 2025513 AMAQI
12th Aug 2025524 AMAQI

28°C22/36°C

12th Aug 2025515 AMAQI
12th Aug 2025516 AMAQI
12th Aug 2025527 AMAQI
12th Aug 2025528 AMAQI
12th Aug 2025529 AMAQI
12th Aug 20255210 AMAQI
12th Aug 20255311 AMAQI
12th Aug 20255412 PMAQI
12th Aug 2025541 PMAQI
12th Aug 2025542 PMAQI
12th Aug 2025543 PMAQI
12th Aug 2025564 PMAQI
12th Aug 2025555 PMAQI
12th Aug 2025566 PMAQI
12th Aug 2025577 PMAQI
12th Aug 2025568 PMAQI
12th Aug 2025529 PMAQI
12th Aug 20255210 PMAQI
12th Aug 20255411 PMAQI
13th Aug 20255512 AMAQI
13th Aug 2025551 AMAQI
13th Aug 2025532 AMAQI
13th Aug 2025533 AMAQI
13th Aug 2025514 AMAQI

28°C19/35°C

13th Aug 2025525 AMAQI
13th Aug 2025556 AMAQI
13th Aug 2025557 AMAQI
13th Aug 2025558 AMAQI
13th Aug 2025559 AMAQI
13th Aug 20255310 AMAQI
13th Aug 20254911 AMAQI
13th Aug 20254212 PMAQI
13th Aug 2025381 PMAQI
13th Aug 2025362 PMAQI
13th Aug 2025383 PMAQI
13th Aug 2025384 PMAQI
13th Aug 2025355 PMAQI
13th Aug 2025326 PMAQI
13th Aug 2025357 PMAQI
13th Aug 2025378 PMAQI
13th Aug 2025469 PMAQI
13th Aug 20254410 PMAQI
13th Aug 20254411 PMAQI
14th Aug 20254712 AMAQI
14th Aug 2025501 AMAQI
14th Aug 2025452 AMAQI
14th Aug 2025383 AMAQI
14th Aug 2025424 AMAQI

26°C20/32°C

14th Aug 2025465 AMAQI
5 AM
14th Aug 2025436 AMAQI
14th Aug 2025377 AMAQI
14th Aug 2025388 AMAQI
14th Aug 2025399 AMAQI
14th Aug 20254510 AMAQI
14th Aug 20254911 AMAQI
14th Aug 20254712 PMAQI
12 PM
14th Aug 2025441 PMAQI
14th Aug 2025402 PMAQI
14th Aug 2025373 PMAQI
14th Aug 2025384 PMAQI
14th Aug 2025365 PMAQI
14th Aug 2025326 PMAQI
14th Aug 2025327 PMAQI
14th Aug 2025288 PMAQI
8 PM
14th Aug 2025519 PMAQI
12 AM
4 AM

23°C19/28°C

Day time
Avg. Highest Time
5 AM - 8 PM

44AQI

16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 8 PM

44AQI

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. 44), while the lowest AQI was between 5 AM to 8 PM (Avg. 44).
Night time
Avg. Highest Time
12 AM - 11 PM

43AQI

8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM

43AQI

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. 43), while the lowest AQI was between 12 AM to 11 PM (Avg. 43).

2025 Days Vs Air Quality

Ottawa, Ontario, Canada

2025

89%

200

11%

25

Total number of days with different AQI categories in last 227 days in 2025 (138 days remaining)

Good
200 Days
Moderate
25 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 89%

Health Risk Level:

Low

In 2025, 89% of 227 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.

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
2nd January 2025
21AQI
3rd January 2025
21AQI
4th January 2025
23AQI
5th January 2025
22AQI
6th January 2025
23AQI
7th January 2025
21AQI
8th January 2025
21AQI
9th January 2025
24AQI
10th January 2025
28AQI
11th January 2025
37AQI
12th January 2025
30AQI
13th January 2025
51AQI
14th January 2025
22AQI
15th January 2025
22AQI
16th January 2025
35AQI
17th January 2025
50AQI
18th January 2025
29AQI
19th January 2025
21AQI
20th January 2025
24AQI
21st January 2025
38AQI
22nd January 2025
42AQI
23rd January 2025
37AQI
24th January 2025
34AQI
25th January 2025
54AQI
26th January 2025
35AQI
27th January 2025
26AQI
28th January 2025
26AQI
29th January 2025
23AQI
30th January 2025
23AQI
31st January 2025
35AQI
1st February 2025
24AQI
2nd February 2025
41AQI
3rd February 2025
53AQI
4th February 2025
22AQI
5th February 2025
23AQI
6th February 2025
34AQI
7th February 2025
28AQI
8th February 2025
23AQI
9th February 2025
24AQI
10th February 2025
22AQI
11th February 2025
28AQI
12th February 2025
28AQI
13th February 2025
22AQI
14th February 2025
21AQI
15th February 2025
23AQI
16th February 2025
21AQI
17th February 2025
21AQI
18th February 2025
20AQI
19th February 2025
19AQI
20th February 2025
22AQI
21st February 2025
28AQI
22nd February 2025
34AQI
23rd February 2025
47AQI
24th February 2025
47AQI
25th February 2025
56AQI
26th February 2025
30AQI
27th February 2025
32AQI
28th February 2025
28AQI
1st March 2025
26AQI
2nd March 2025
24AQI
3rd March 2025
44AQI
4th March 2025
38AQI
5th March 2025
48AQI
6th March 2025
26AQI
7th March 2025
28AQI
8th March 2025
30AQI
9th March 2025
28AQI
10th March 2025
25AQI
11th March 2025
35AQI
12th March 2025
26AQI
13th March 2025
34AQI
14th March 2025
60AQI
15th March 2025
57AQI
16th March 2025
43AQI
17th March 2025
16AQI
18th March 2025
23AQI
19th March 2025
27AQI
20th March 2025
30AQI
21st March 2025
17AQI
22nd March 2025
20AQI
23rd March 2025
17AQI
24th March 2025
23AQI
25th March 2025
20AQI
26th March 2025
20AQI
27th March 2025
18AQI
28th March 2025
18AQI
29th March 2025
17AQI
30th March 2025
20AQI
31st March 2025
24AQI
1st April 2025
16AQI
2nd April 2025
19AQI
3rd April 2025
22AQI
4th April 2025
18AQI
5th April 2025
20AQI
6th April 2025
18AQI
7th April 2025
20AQI
8th April 2025
18AQI
9th April 2025
16AQI
10th April 2025
25AQI
11th April 2025
31AQI
12th April 2025
26AQI
13th April 2025
27AQI
14th April 2025
27AQI
15th April 2025
22AQI
16th April 2025
15AQI
17th April 2025
16AQI
18th April 2025
29AQI
19th April 2025
38AQI
20th April 2025
15AQI
21st April 2025
19AQI
22nd April 2025
16AQI
23rd April 2025
13AQI
24th April 2025
19AQI
25th April 2025
20AQI
26th April 2025
16AQI
27th April 2025
12AQI
28th April 2025
17AQI
29th April 2025
25AQI
30th April 2025
14AQI
1st May 2025
21AQI
2nd May 2025
21AQI
3rd May 2025
13AQI
4th May 2025
17AQI
5th May 2025
16AQI
6th May 2025
17AQI
7th May 2025
18AQI
8th May 2025
14AQI
9th May 2025
16AQI
10th May 2025
18AQI
11th May 2025
15AQI
12th May 2025
19AQI
13th May 2025
27AQI
14th May 2025
29AQI
15th May 2025
26AQI
16th May 2025
31AQI
17th May 2025
32AQI
18th May 2025
15AQI
19th May 2025
12AQI
20th May 2025
12AQI
21st May 2025
19AQI
22nd May 2025
14AQI
23rd May 2025
15AQI
24th May 2025
12AQI
25th May 2025
15AQI
26th May 2025
21AQI
27th May 2025
22AQI
28th May 2025
26AQI
29th May 2025
21AQI
30th May 2025
22AQI
31st May 2025
23AQI
1st June 2025
12AQI
2nd June 2025
16AQI
3rd June 2025
26AQI
4th June 2025
44AQI
5th June 2025
46AQI
6th June 2025
53AQI
7th June 2025
60AQI
8th June 2025
57AQI
9th June 2025
57AQI
10th June 2025
39AQI
11th June 2025
51AQI
12th June 2025
53AQI
13th June 2025
25AQI
14th June 2025
24AQI
15th June 2025
27AQI
16th June 2025
35AQI
17th June 2025
29AQI
18th June 2025
29AQI
19th June 2025
32AQI
20th June 2025
19AQI
21st June 2025
25AQI
22nd June 2025
26AQI
23rd June 2025
40AQI
24th June 2025
50AQI
25th June 2025
39AQI
26th June 2025
25AQI
27th June 2025
24AQI
28th June 2025
27AQI
29th June 2025
21AQI
30th June 2025
28AQI
1st July 2025
34AQI
2nd July 2025
32AQI
3rd July 2025
42AQI
4th July 2025
25AQI
5th July 2025
27AQI
6th July 2025
46AQI
7th July 2025
44AQI
8th July 2025
26AQI
9th July 2025
26AQI
10th July 2025
32AQI
11th July 2025
37AQI
12th July 2025
47AQI
13th July 2025
42AQI
14th July 2025
45AQI
15th July 2025
46AQI
16th July 2025
54AQI
17th July 2025
53AQI
18th July 2025
24AQI
19th July 2025
30AQI
20th July 2025
30AQI
21st July 2025
28AQI
22nd July 2025
19AQI
23rd July 2025
23AQI
24th July 2025
27AQI
25th July 2025
31AQI
26th July 2025
50AQI
27th July 2025
58AQI
28th July 2025
60AQI
29th July 2025
48AQI
30th July 2025
62AQI
31st July 2025
51AQI
1st August 2025
21AQI
2nd August 2025
37AQI
3rd August 2025
60AQI
4th August 2025
72AQI
5th August 2025
35AQI
6th August 2025
29AQI
7th August 2025
38AQI
8th August 2025
55AQI
9th August 2025
60AQI
10th August 2025
63AQI
11th August 2025
56AQI
12th August 2025
53AQI
13th August 2025
48AQI

30AQI

29AQI

28AQI

20AQI

19AQI

35AQI

39AQI

48AQI

No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202530AQI

29
2
26
2
29
2
30
31
24
6
25
6
6
7
200
25

Highest AQI recorded in

August

48AQI

Lowest AQI recorded in

May

19AQI

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

February

36AQI

Lowest AQI recorded in

November

23AQI

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

June

74AQI

Lowest AQI recorded in

November

28AQI

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

January

40AQI

Lowest AQI recorded in

August

21AQI

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

August

37AQI

Lowest AQI recorded in

September

20AQI

202026AQI

13
21
18
30
31
31
30
31
24
6
28
3
257
9

Highest AQI recorded in

November

36AQI

Lowest AQI recorded in

August

20AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2023(Avg.)
37AQI
Least Polluted Year Recorded
2020(Avg.)
26AQI

Ottawa's annual 2025 AQI (30) shows an average percentage change of -0.8% (improved AQI) compared to previous years: 2020 (26), 2021 (30), 2022 (30), 2023 (37), 2024 (29).