Waterloo, 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+
July Air Quality Analysis
Waterloo, Ontario, Canada
2022
2023
2024
2025
2026
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
16th Jul 2026
242AQILowest AQI recorded on
1st Jul 2024
18AQISame Day Analysis (28th July):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 61 of Moderate air quality, showing improvement over 2023 on the same day.
Day & Night AQI Trend: 28th Jul - 29th Jul 2026
Waterloo, Ontario, Canada
AQI
Day
Night
.
5 AM28th Jul 2026
9 PM
4 AM29th Jul 2026
Day time
Avg. Highest Time
8AM28th Jul
76AQI
Avg. Lowest Time
3PM28th Jul
46AQI
Night time
Avg. Highest Time
5AM28th Jul
70AQI
Avg. Lowest Time
4AM29th Jul
31AQI
In the last 24 hours,
Waterloo's AQI reached its highest point of 76 at 8 AM during the Day, while the lowest point, 31, was recorded at 4 AM during the Night between 28th Jul and 29th Jul 2026.
Day & Night AQI Trend : Jun - Jul 2026
Waterloo, Ontario, Canada
JunJul
30th - 01st01st - 02nd02nd - 03rd03rd - 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
Day
Night
30th Jun 2026595 AMAQI
30th Jun 2026626 AMAQI
30th Jun 2026607 AMAQI
30th Jun 2026618 AMAQI
30th Jun 2026639 AMAQI
30th Jun 20266310 AMAQI
30th Jun 20266011 AMAQI
30th Jun 20266012 PMAQI
30th Jun 2026581 PMAQI
30th Jun 2026622 PMAQI
30th Jun 2026583 PMAQI
30th Jun 2026604 PMAQI
30th Jun 2026565 PMAQI
30th Jun 2026606 PMAQI
30th Jun 2026627 PMAQI
30th Jun 2026648 PMAQI
30th Jun 2026629 PMAQI
30th Jun 20266410 PMAQI
30th Jun 20266411 PMAQI
1st Jul 20266812 AMAQI
1st Jul 2026661 AMAQI
1st Jul 2026622 AMAQI
1st Jul 2026653 AMAQI
1st Jul 2026654 AMAQI
27°C18/34°C
1st Jul 2026615 AMAQI
1st Jul 2026646 AMAQI
1st Jul 2026627 AMAQI
1st Jul 2026598 AMAQI
1st Jul 2026609 AMAQI
1st Jul 20265810 AMAQI
1st Jul 20265911 AMAQI
1st Jul 20266012 PMAQI
1st Jul 2026581 PMAQI
1st Jul 2026542 PMAQI
1st Jul 2026603 PMAQI
1st Jul 2026604 PMAQI
1st Jul 2026695 PMAQI
1st Jul 2026466 PMAQI
1st Jul 2026387 PMAQI
1st Jul 2026418 PMAQI
1st Jul 2026259 PMAQI
1st Jul 20263410 PMAQI
1st Jul 20265011 PMAQI
2nd Jul 20264412 AMAQI
2nd Jul 2026501 AMAQI
2nd Jul 2026502 AMAQI
2nd Jul 2026523 AMAQI
2nd Jul 2026504 AMAQI
28°C23/37°C
2nd Jul 2026545 AMAQI
2nd Jul 2026526 AMAQI
2nd Jul 2026547 AMAQI
2nd Jul 2026578 AMAQI
2nd Jul 2026579 AMAQI
2nd Jul 20265810 AMAQI
2nd Jul 20265411 AMAQI
2nd Jul 20265512 PMAQI
2nd Jul 2026591 PMAQI
2nd Jul 2026582 PMAQI
2nd Jul 2026553 PMAQI
2nd Jul 2026524 PMAQI
2nd Jul 2026525 PMAQI
2nd Jul 2026516 PMAQI
2nd Jul 2026457 PMAQI
2nd Jul 2026488 PMAQI
2nd Jul 2026489 PMAQI
2nd Jul 20265310 PMAQI
2nd Jul 20265211 PMAQI
3rd Jul 20265012 AMAQI
3rd Jul 2026541 AMAQI
3rd Jul 2026512 AMAQI
3rd Jul 2026493 AMAQI
3rd Jul 2026504 AMAQI
27°C22/36°C
3rd Jul 2026495 AMAQI
3rd Jul 2026516 AMAQI
3rd Jul 2026487 AMAQI
3rd Jul 2026308 AMAQI
3rd Jul 2026289 AMAQI
3rd Jul 20264410 AMAQI
3rd Jul 20265911 AMAQI
3rd Jul 20265612 PMAQI
3rd Jul 2026561 PMAQI
3rd Jul 2026492 PMAQI
3rd Jul 2026453 PMAQI
3rd Jul 2026324 PMAQI
3rd Jul 2026305 PMAQI
3rd Jul 2026306 PMAQI
3rd Jul 2026327 PMAQI
3rd Jul 2026278 PMAQI
3rd Jul 2026309 PMAQI
3rd Jul 20263110 PMAQI
3rd Jul 20263811 PMAQI
4th Jul 20264012 AMAQI
4th Jul 2026391 AMAQI
4th Jul 2026372 AMAQI
4th Jul 2026363 AMAQI
4th Jul 2026354 AMAQI
27°C21/34°C
4th Jul 2026445 AMAQI
4th Jul 2026546 AMAQI
4th Jul 2026597 AMAQI
4th Jul 2026428 AMAQI
4th Jul 2026469 AMAQI
4th Jul 20264210 AMAQI
4th Jul 20264311 AMAQI
4th Jul 20264512 PMAQI
4th Jul 2026441 PMAQI
4th Jul 2026452 PMAQI
4th Jul 2026423 PMAQI
4th Jul 2026424 PMAQI
4th Jul 2026425 PMAQI
4th Jul 2026426 PMAQI
4th Jul 2026457 PMAQI
4th Jul 2026558 PMAQI
4th Jul 2026559 PMAQI
4th Jul 20265410 PMAQI
4th Jul 20264711 PMAQI
5th Jul 20264612 AMAQI
5th Jul 2026511 AMAQI
5th Jul 2026542 AMAQI
5th Jul 2026633 AMAQI
5th Jul 2026724 AMAQI
24°C21/30°C
5th Jul 2026745 AMAQI
5th Jul 2026726 AMAQI
5th Jul 2026747 AMAQI
5th Jul 2026728 AMAQI
5th Jul 2026629 AMAQI
5th Jul 20266510 AMAQI
5th Jul 20265111 AMAQI
5th Jul 20265312 PMAQI
5th Jul 2026541 PMAQI
5th Jul 2026492 PMAQI
5th Jul 2026523 PMAQI
5th Jul 2026524 PMAQI
5th Jul 2026535 PMAQI
5th Jul 2026526 PMAQI
5th Jul 2026567 PMAQI
5th Jul 2026588 PMAQI
5th Jul 2026589 PMAQI
5th Jul 20265810 PMAQI
5th Jul 20266011 PMAQI
6th Jul 20266012 AMAQI
6th Jul 2026621 AMAQI
6th Jul 2026632 AMAQI
6th Jul 2026623 AMAQI
6th Jul 2026634 AMAQI
22°C18/28°C
6th Jul 2026565 AMAQI
6th Jul 2026486 AMAQI
6th Jul 2026367 AMAQI
6th Jul 2026288 AMAQI
6th Jul 2026269 AMAQI
6th Jul 20263610 AMAQI
6th Jul 20264211 AMAQI
6th Jul 20264612 PMAQI
6th Jul 2026501 PMAQI
6th Jul 2026522 PMAQI
6th Jul 2026593 PMAQI
6th Jul 2026614 PMAQI
6th Jul 2026595 PMAQI
6th Jul 2026546 PMAQI
6th Jul 2026487 PMAQI
6th Jul 2026328 PMAQI
6th Jul 2026349 PMAQI
6th Jul 20263910 PMAQI
6th Jul 20263811 PMAQI
7th Jul 20264412 AMAQI
7th Jul 2026491 AMAQI
7th Jul 2026542 AMAQI
7th Jul 2026563 AMAQI
7th Jul 2026614 AMAQI
22°C15/29°C
7th Jul 2026605 AMAQI
7th Jul 2026466 AMAQI
7th Jul 2026427 AMAQI
7th Jul 2026338 AMAQI
7th Jul 2026309 AMAQI
7th Jul 20263110 AMAQI
7th Jul 20262711 AMAQI
7th Jul 20262312 PMAQI
7th Jul 2026261 PMAQI
7th Jul 2026292 PMAQI
7th Jul 2026263 PMAQI
7th Jul 2026224 PMAQI
7th Jul 2026225 PMAQI
7th Jul 2026246 PMAQI
7th Jul 2026247 PMAQI
7th Jul 2026228 PMAQI
7th Jul 2026299 PMAQI
7th Jul 20263010 PMAQI
7th Jul 20263211 PMAQI
8th Jul 20263412 AMAQI
8th Jul 2026341 AMAQI
8th Jul 2026362 AMAQI
8th Jul 2026403 AMAQI
8th Jul 2026394 AMAQI
23°C18/31°C
8th Jul 2026365 AMAQI
8th Jul 2026346 AMAQI
8th Jul 2026327 AMAQI
8th Jul 2026248 AMAQI
8th Jul 2026249 AMAQI
8th Jul 20262810 AMAQI
8th Jul 20262911 AMAQI
8th Jul 20262812 PMAQI
8th Jul 2026281 PMAQI
8th Jul 2026262 PMAQI
8th Jul 2026283 PMAQI
8th Jul 2026324 PMAQI
8th Jul 2026365 PMAQI
8th Jul 2026496 PMAQI
8th Jul 2026507 PMAQI
8th Jul 2026458 PMAQI
8th Jul 2026439 PMAQI
8th Jul 20264710 PMAQI
8th Jul 20265011 PMAQI
9th Jul 20264612 AMAQI
9th Jul 2026501 AMAQI
9th Jul 2026562 AMAQI
9th Jul 2026573 AMAQI
9th Jul 2026604 AMAQI
24°C16/33°C
9th Jul 2026625 AMAQI
9th Jul 2026686 AMAQI
9th Jul 2026657 AMAQI
9th Jul 2026608 AMAQI
9th Jul 2026589 AMAQI
9th Jul 20265410 AMAQI
9th Jul 20264811 AMAQI
9th Jul 20265012 PMAQI
9th Jul 2026501 PMAQI
9th Jul 2026432 PMAQI
9th Jul 2026283 PMAQI
9th Jul 2026364 PMAQI
9th Jul 2026425 PMAQI
9th Jul 2026406 PMAQI
9th Jul 2026417 PMAQI
9th Jul 2026428 PMAQI
9th Jul 2026449 PMAQI
9th Jul 20264610 PMAQI
9th Jul 20264411 PMAQI
10th Jul 20263412 AMAQI
10th Jul 2026311 AMAQI
10th Jul 2026262 AMAQI
10th Jul 2026293 AMAQI
10th Jul 2026334 AMAQI
24°C19/30°C
10th Jul 2026565 AMAQI
10th Jul 2026476 AMAQI
10th Jul 2026327 AMAQI
10th Jul 2026278 AMAQI
10th Jul 2026239 AMAQI
10th Jul 20263810 AMAQI
10th Jul 20262611 AMAQI
10th Jul 20262912 PMAQI
10th Jul 2026301 PMAQI
10th Jul 2026292 PMAQI
10th Jul 2026283 PMAQI
10th Jul 2026324 PMAQI
10th Jul 2026355 PMAQI
10th Jul 2026326 PMAQI
10th Jul 2026407 PMAQI
10th Jul 2026428 PMAQI
10th Jul 2026429 PMAQI
10th Jul 20264210 PMAQI
10th Jul 20264811 PMAQI
11th Jul 20265312 AMAQI
11th Jul 2026561 AMAQI
11th Jul 2026592 AMAQI
11th Jul 2026623 AMAQI
11th Jul 2026644 AMAQI
23°C18/28°C
11th Jul 2026665 AMAQI
11th Jul 2026726 AMAQI
11th Jul 2026657 AMAQI
11th Jul 2026678 AMAQI
11th Jul 2026669 AMAQI
11th Jul 20266310 AMAQI
11th Jul 20266211 AMAQI
11th Jul 20265812 PMAQI
11th Jul 2026641 PMAQI
11th Jul 2026642 PMAQI
11th Jul 2026603 PMAQI
11th Jul 2026604 PMAQI
11th Jul 2026615 PMAQI
11th Jul 2026606 PMAQI
11th Jul 2026687 PMAQI
11th Jul 2026738 PMAQI
11th Jul 2026729 PMAQI
11th Jul 20267810 PMAQI
11th Jul 20267711 PMAQI
12th Jul 20267512 AMAQI
12th Jul 2026801 AMAQI
12th Jul 2026792 AMAQI
12th Jul 2026793 AMAQI
12th Jul 2026834 AMAQI
23°C16/30°C
12th Jul 2026825 AMAQI
12th Jul 2026806 AMAQI
12th Jul 2026807 AMAQI
12th Jul 2026768 AMAQI
12th Jul 2026619 AMAQI
12th Jul 20264610 AMAQI
12th Jul 20265611 AMAQI
12th Jul 20266012 PMAQI
12th Jul 2026601 PMAQI
12th Jul 2026652 PMAQI
12th Jul 2026643 PMAQI
12th Jul 2026624 PMAQI
12th Jul 2026645 PMAQI
12th Jul 2026646 PMAQI
12th Jul 2026807 PMAQI
12th Jul 2026888 PMAQI
12th Jul 2026909 PMAQI
12th Jul 20268710 PMAQI
12th Jul 20268411 PMAQI
13th Jul 20268612 AMAQI
13th Jul 2026901 AMAQI
13th Jul 2026862 AMAQI
13th Jul 2026883 AMAQI
13th Jul 2026854 AMAQI
23°C14/31°C
13th Jul 2026865 AMAQI
13th Jul 2026856 AMAQI
13th Jul 2026807 AMAQI
13th Jul 2026798 AMAQI
13th Jul 2026689 AMAQI
13th Jul 20266410 AMAQI
13th Jul 20266211 AMAQI
13th Jul 20265812 PMAQI
13th Jul 2026621 PMAQI
13th Jul 2026642 PMAQI
13th Jul 2026623 PMAQI
13th Jul 2026604 PMAQI
13th Jul 2026565 PMAQI
13th Jul 2026556 PMAQI
13th Jul 2026507 PMAQI
13th Jul 2026448 PMAQI
13th Jul 2026519 PMAQI
13th Jul 20265110 PMAQI
13th Jul 20266811 PMAQI
14th Jul 20267212 AMAQI
14th Jul 2026701 AMAQI
14th Jul 2026722 AMAQI
14th Jul 2026723 AMAQI
14th Jul 2026694 AMAQI
24°C14/34°C
14th Jul 2026745 AMAQI
14th Jul 2026706 AMAQI
14th Jul 2026667 AMAQI
14th Jul 2026648 AMAQI
14th Jul 2026619 AMAQI
14th Jul 20265910 AMAQI
14th Jul 20265911 AMAQI
14th Jul 20265812 PMAQI
14th Jul 2026561 PMAQI
14th Jul 2026522 PMAQI
14th Jul 2026483 PMAQI
14th Jul 2026384 PMAQI
14th Jul 2026395 PMAQI
14th Jul 2026446 PMAQI
14th Jul 2026417 PMAQI
14th Jul 2026458 PMAQI
14th Jul 2026439 PMAQI
14th Jul 20264910 PMAQI
14th Jul 20265411 PMAQI
15th Jul 20265112 AMAQI
15th Jul 2026501 AMAQI
15th Jul 2026462 AMAQI
15th Jul 2026423 AMAQI
15th Jul 2026474 AMAQI
29°C21/38°C
15th Jul 2026545 AMAQI
15th Jul 2026806 AMAQI
15th Jul 20261057 AMAQI
15th Jul 20261628 AMAQI
15th Jul 20261979 AMAQI
15th Jul 202622210 AMAQI
15th Jul 202625611 AMAQI
15th Jul 202631412 PMAQI
15th Jul 20263681 PMAQI
15th Jul 20262592 PMAQI
15th Jul 20262163 PMAQI
15th Jul 20261964 PMAQI
15th Jul 20261955 PMAQI
15th Jul 20261926 PMAQI
15th Jul 20261837 PMAQI
15th Jul 20261828 PMAQI
15th Jul 20261779 PMAQI
15th Jul 202617610 PMAQI
15th Jul 202617211 PMAQI
16th Jul 202617012 AMAQI
16th Jul 20261661 AMAQI
16th Jul 20261792 AMAQI
16th Jul 20262243 AMAQI
16th Jul 20263044 AMAQI
26°C20/34°C
16th Jul 20263245 AMAQI
16th Jul 20263196 AMAQI
16th Jul 20262707 AMAQI
16th Jul 20262228 AMAQI
16th Jul 20261959 AMAQI
16th Jul 202618810 AMAQI
16th Jul 202618411 AMAQI
16th Jul 202618012 PMAQI
16th Jul 20261841 PMAQI
16th Jul 20261942 PMAQI
16th Jul 20262123 PMAQI
16th Jul 20262404 PMAQI
16th Jul 20262775 PMAQI
16th Jul 20262886 PMAQI
16th Jul 20262727 PMAQI
16th Jul 20262788 PMAQI
16th Jul 20263209 PMAQI
16th Jul 202632110 PMAQI
16th Jul 202631211 PMAQI
17th Jul 202632412 AMAQI
17th Jul 20263261 AMAQI
17th Jul 20263382 AMAQI
17th Jul 20263263 AMAQI
17th Jul 20263114 AMAQI
22°C17/27°C
17th Jul 20263345 AMAQI
17th Jul 20263506 AMAQI
17th Jul 20263307 AMAQI
17th Jul 20263208 AMAQI
17th Jul 20262459 AMAQI
17th Jul 202621810 AMAQI
17th Jul 202619811 AMAQI
17th Jul 202617212 PMAQI
17th Jul 20261641 PMAQI
17th Jul 20261722 PMAQI
17th Jul 20261703 PMAQI
17th Jul 20261724 PMAQI
17th Jul 20261685 PMAQI
17th Jul 20261666 PMAQI
17th Jul 20261767 PMAQI
17th Jul 20261808 PMAQI
17th Jul 20261809 PMAQI
17th Jul 202618910 PMAQI
17th Jul 202619211 PMAQI
18th Jul 202618612 AMAQI
18th Jul 20261821 AMAQI
18th Jul 20261862 AMAQI
18th Jul 20261883 AMAQI
18th Jul 20261864 AMAQI
23°C14/32°C
18th Jul 20261835 AMAQI
18th Jul 20261746 AMAQI
18th Jul 20261587 AMAQI
18th Jul 20261058 AMAQI
18th Jul 2026969 AMAQI
18th Jul 20268810 AMAQI
18th Jul 20267811 AMAQI
18th Jul 20267312 PMAQI
18th Jul 2026721 PMAQI
18th Jul 2026602 PMAQI
18th Jul 2026933 PMAQI
18th Jul 20261124 PMAQI
18th Jul 20261265 PMAQI
18th Jul 20261476 PMAQI
18th Jul 20261517 PMAQI
18th Jul 20261528 PMAQI
18th Jul 20261509 PMAQI
18th Jul 202614210 PMAQI
18th Jul 20268311 PMAQI
19th Jul 20267812 AMAQI
19th Jul 2026821 AMAQI
19th Jul 2026812 AMAQI
19th Jul 2026843 AMAQI
19th Jul 2026904 AMAQI
23°C17/30°C
19th Jul 2026975 AMAQI
19th Jul 20261036 AMAQI
19th Jul 20261107 AMAQI
19th Jul 2026998 AMAQI
19th Jul 2026889 AMAQI
19th Jul 20266810 AMAQI
19th Jul 20265811 AMAQI
19th Jul 20265012 PMAQI
19th Jul 2026491 PMAQI
19th Jul 2026502 PMAQI
19th Jul 2026403 PMAQI
19th Jul 2026524 PMAQI
19th Jul 2026375 PMAQI
19th Jul 2026406 PMAQI
19th Jul 2026407 PMAQI
19th Jul 2026348 PMAQI
19th Jul 2026309 PMAQI
19th Jul 20263310 PMAQI
19th Jul 20263211 PMAQI
20th Jul 20263112 AMAQI
20th Jul 2026341 AMAQI
20th Jul 2026322 AMAQI
20th Jul 2026363 AMAQI
20th Jul 2026384 AMAQI
19°C13/25°C
20th Jul 2026375 AMAQI
20th Jul 2026406 AMAQI
20th Jul 2026387 AMAQI
20th Jul 2026368 AMAQI
20th Jul 2026429 AMAQI
20th Jul 20263610 AMAQI
20th Jul 20265011 AMAQI
20th Jul 20265212 PMAQI
20th Jul 2026721 PMAQI
20th Jul 2026682 PMAQI
20th Jul 2026763 PMAQI
20th Jul 2026804 PMAQI
20th Jul 2026945 PMAQI
20th Jul 2026946 PMAQI
20th Jul 20261087 PMAQI
20th Jul 20261038 PMAQI
20th Jul 20261049 PMAQI
20th Jul 202611210 PMAQI
21st Jul 202611212 AMAQI
21st Jul 20261141 AMAQI
21st Jul 20261152 AMAQI
21st Jul 20261103 AMAQI
21st Jul 20261054 AMAQI
18°C9/28°C
21st Jul 20261035 AMAQI
21st Jul 2026686 AMAQI
21st Jul 2026667 AMAQI
21st Jul 2026968 AMAQI
21st Jul 2026909 AMAQI
21st Jul 20269610 AMAQI
21st Jul 202610411 AMAQI
21st Jul 20268012 PMAQI
21st Jul 2026811 PMAQI
21st Jul 2026762 PMAQI
21st Jul 2026643 PMAQI
21st Jul 2026544 PMAQI
21st Jul 2026515 PMAQI
21st Jul 2026526 PMAQI
21st Jul 2026527 PMAQI
21st Jul 2026528 PMAQI
21st Jul 2026499 PMAQI
21st Jul 20263310 PMAQI
21st Jul 20261711 PMAQI
22nd Jul 20261812 AMAQI
22nd Jul 2026181 AMAQI
22nd Jul 2026172 AMAQI
22nd Jul 2026133 AMAQI
22nd Jul 2026224 AMAQI
21°C16/25°C
22nd Jul 2026245 AMAQI
22nd Jul 2026426 AMAQI
22nd Jul 2026267 AMAQI
22nd Jul 2026248 AMAQI
22nd Jul 2026369 AMAQI
22nd Jul 20262810 AMAQI
22nd Jul 20262611 AMAQI
22nd Jul 20262412 PMAQI
22nd Jul 2026181 PMAQI
22nd Jul 2026172 PMAQI
22nd Jul 2026173 PMAQI
22nd Jul 2026154 PMAQI
22nd Jul 2026215 PMAQI
22nd Jul 2026176 PMAQI
22nd Jul 2026207 PMAQI
22nd Jul 2026198 PMAQI
22nd Jul 2026229 PMAQI
22nd Jul 20261810 PMAQI
22nd Jul 20261811 PMAQI
23rd Jul 20261812 AMAQI
23rd Jul 2026211 AMAQI
23rd Jul 2026202 AMAQI
23rd Jul 2026203 AMAQI
23rd Jul 2026204 AMAQI
17°C12/23°C
23rd Jul 2026225 AMAQI
23rd Jul 2026286 AMAQI
23rd Jul 2026267 AMAQI
23rd Jul 2026338 AMAQI
23rd Jul 2026309 AMAQI
23rd Jul 20262510 AMAQI
23rd Jul 20262411 AMAQI
23rd Jul 20262412 PMAQI
23rd Jul 2026281 PMAQI
23rd Jul 2026242 PMAQI
23rd Jul 2026243 PMAQI
23rd Jul 2026264 PMAQI
23rd Jul 2026225 PMAQI
23rd Jul 2026266 PMAQI
23rd Jul 2026227 PMAQI
23rd Jul 2026228 PMAQI
23rd Jul 2026269 PMAQI
23rd Jul 20262810 PMAQI
23rd Jul 20262611 PMAQI
24th Jul 20262912 AMAQI
24th Jul 2026291 AMAQI
24th Jul 2026302 AMAQI
24th Jul 2026323 AMAQI
24th Jul 2026344 AMAQI
17°C10/25°C
24th Jul 2026385 AMAQI
24th Jul 2026326 AMAQI
24th Jul 2026367 AMAQI
24th Jul 2026348 AMAQI
24th Jul 2026309 AMAQI
24th Jul 20262610 AMAQI
24th Jul 20262811 AMAQI
24th Jul 20262812 PMAQI
24th Jul 2026321 PMAQI
24th Jul 2026282 PMAQI
24th Jul 2026273 PMAQI
24th Jul 2026274 PMAQI
24th Jul 2026285 PMAQI
24th Jul 2026306 PMAQI
24th Jul 2026267 PMAQI
24th Jul 2026288 PMAQI
24th Jul 2026309 PMAQI
24th Jul 20263210 PMAQI
24th Jul 20264011 PMAQI
25th Jul 20263812 AMAQI
25th Jul 2026381 AMAQI
25th Jul 2026432 AMAQI
25th Jul 2026443 AMAQI
25th Jul 2026444 AMAQI
19°C10/29°C
25th Jul 2026445 AMAQI
25th Jul 2026386 AMAQI
25th Jul 2026387 AMAQI
25th Jul 2026368 AMAQI
25th Jul 2026349 AMAQI
25th Jul 20263810 AMAQI
25th Jul 20263411 AMAQI
25th Jul 20263512 PMAQI
25th Jul 2026361 PMAQI
25th Jul 2026382 PMAQI
25th Jul 2026403 PMAQI
25th Jul 2026404 PMAQI
25th Jul 2026385 PMAQI
25th Jul 2026396 PMAQI
25th Jul 2026387 PMAQI
25th Jul 2026398 PMAQI
25th Jul 2026409 PMAQI
25th Jul 20264510 PMAQI
25th Jul 20264611 PMAQI
26th Jul 20264912 AMAQI
26th Jul 2026511 AMAQI
26th Jul 2026452 AMAQI
26th Jul 2026463 AMAQI
26th Jul 2026504 AMAQI
21°C13/28°C
26th Jul 2026535 AMAQI
26th Jul 2026526 AMAQI
26th Jul 2026567 AMAQI
26th Jul 2026508 AMAQI
26th Jul 2026509 AMAQI
26th Jul 20265010 AMAQI
26th Jul 20265011 AMAQI
26th Jul 20265012 PMAQI
26th Jul 2026541 PMAQI
26th Jul 2026522 PMAQI
26th Jul 2026493 PMAQI
26th Jul 2026494 PMAQI
26th Jul 2026505 PMAQI
26th Jul 2026526 PMAQI
26th Jul 2026527 PMAQI
26th Jul 2026508 PMAQI
26th Jul 2026489 PMAQI
26th Jul 20265210 PMAQI
26th Jul 20265211 PMAQI
27th Jul 20265112 AMAQI
27th Jul 2026541 AMAQI
27th Jul 2026542 AMAQI
27th Jul 2026513 AMAQI
27th Jul 2026534 AMAQI
21°C14/28°C
27th Jul 2026545 AMAQI
27th Jul 2026556 AMAQI
27th Jul 2026567 AMAQI
27th Jul 2026568 AMAQI
27th Jul 2026569 AMAQI
27th Jul 20265910 AMAQI
27th Jul 20266311 AMAQI
27th Jul 20266512 PMAQI
27th Jul 2026701 PMAQI
27th Jul 2026702 PMAQI
27th Jul 2026703 PMAQI
27th Jul 2026704 PMAQI
27th Jul 2026545 PMAQI
27th Jul 2026636 PMAQI
27th Jul 2026617 PMAQI
27th Jul 2026638 PMAQI
27th Jul 2026669 PMAQI
27th Jul 20266510 PMAQI
27th Jul 20266811 PMAQI
28th Jul 20266812 AMAQI
28th Jul 2026681 AMAQI
28th Jul 2026692 AMAQI
28th Jul 2026723 AMAQI
28th Jul 2026724 AMAQI
22°C14/31°C
28th Jul 2026705 AMAQI
28th Jul 2026696 AMAQI
28th Jul 2026727 AMAQI
28th Jul 2026768 AMAQI
28th Jul 2026699 AMAQI
28th Jul 20266810 AMAQI
28th Jul 20267011 AMAQI
28th Jul 20266912 PMAQI
28th Jul 2026621 PMAQI
28th Jul 2026582 PMAQI
28th Jul 2026463 PMAQI
28th Jul 2026514 PMAQI
28th Jul 2026505 PMAQI
28th Jul 2026486 PMAQI
28th Jul 2026547 PMAQI
28th Jul 2026508 PMAQI
28th Jul 2026499 PMAQI
28th Jul 20264810 PMAQI
28th Jul 20264711 PMAQI
29th Jul 20264512 AMAQI
29th Jul 2026441 AMAQI
29th Jul 2026402 AMAQI
29th Jul 2026343 AMAQI
29th Jul 2026314 AMAQI
22°C17/27°C
29th Jul 2026305 AMAQI
5 AM29th Jul 2026336 AMAQI
29th Jul 2026307 AMAQI
29th Jul 2026308 AMAQI
29th Jul 2026249 AMAQI
29th Jul 20262210 AMAQI
29th Jul 20262011 AMAQI
29th Jul 20261612 PMAQI
29th Jul 2026161 PMAQI
1 PM29th Jul 2026162 PMAQI
29th Jul 2026183 PMAQI
29th Jul 2026184 PMAQI
29th Jul 2026165 PMAQI
29th Jul 2026196 PMAQI
29th Jul 2026267 PMAQI
29th Jul 2026208 PMAQI
29th Jul 2026259 PMAQI
9 PM29th Jul 20262610 PMAQI
1 AM
4 AM
21°C15/28°C
Day time
Avg. Highest Time
5 AM - 6 AM
80AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
2 PM - 4 PM
63AQI
3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 6 AM (Avg. 80), while the lowest AQI was between 2 PM to 4 PM (Avg. 63).
Night time
Avg. Highest Time
4 AM
77AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
10 PM - 11 PM
69AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 4 AM to 4 AM (Avg. 77), while the lowest AQI was between 10 PM to 11 PM (Avg. 69).
2026 Days Vs Air Quality
Waterloo, Ontario, Canada
2026
74%
153
23%
47
1%
3
0.4%
1
0.9%
2
Total number of days with different AQI categories in last 210 days in 2026 (155 days remaining)
Good
153 DaysModerate
47 DaysPoor
3 DaysUnhealthy
1 DaysSevere
2 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 74%
Health Risk Level:
Low
In 2026, 74% of 210 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
Waterloo, Ontario, Canada
AQI levels in 2026
AQI (US)
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.
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
1st January 2026
8AQI (US)
8AQI (US)
2nd January 2026
9AQI (US)
9AQI (US)
3rd January 2026
24AQI (US)
24AQI (US)
4th January 2026
18AQI (US)
18AQI (US)
5th January 2026
70AQI (US)
70AQI (US)
6th January 2026
92AQI (US)
92AQI (US)
7th January 2026
64AQI (US)
64AQI (US)
8th January 2026
75AQI (US)
75AQI (US)
9th January 2026
36AQI (US)
36AQI (US)
10th January 2026
29AQI (US)
29AQI (US)
11th January 2026
23AQI (US)
23AQI (US)
12th January 2026
48AQI (US)
48AQI (US)
13th January 2026
60AQI (US)
60AQI (US)
14th January 2026
43AQI (US)
43AQI (US)
15th January 2026
10AQI (US)
10AQI (US)
16th January 2026
42AQI (US)
42AQI (US)
17th January 2026
46AQI (US)
46AQI (US)
18th January 2026
32AQI (US)
32AQI (US)
19th January 2026
34AQI (US)
34AQI (US)
20th January 2026
22AQI (US)
22AQI (US)
21st January 2026
46AQI (US)
46AQI (US)
22nd January 2026
48AQI (US)
48AQI (US)
23rd January 2026
38AQI (US)
38AQI (US)
24th January 2026
35AQI (US)
35AQI (US)
25th January 2026
38AQI (US)
38AQI (US)
26th January 2026
32AQI (US)
32AQI (US)
27th January 2026
46AQI (US)
46AQI (US)
28th January 2026
40AQI (US)
40AQI (US)
29th January 2026
34AQI (US)
34AQI (US)
30th January 2026
44AQI (US)
44AQI (US)
31st January 2026
35AQI (US)
35AQI (US)
1st February 2026
30AQI (US)
30AQI (US)
2nd February 2026
73AQI (US)
73AQI (US)
3rd February 2026
84AQI (US)
84AQI (US)
4th February 2026
32AQI (US)
32AQI (US)
5th February 2026
50AQI (US)
50AQI (US)
6th February 2026
84AQI (US)
84AQI (US)
7th February 2026
25AQI (US)
25AQI (US)
8th February 2026
38AQI (US)
38AQI (US)
9th February 2026
40AQI (US)
40AQI (US)
10th February 2026
79AQI (US)
79AQI (US)
11th February 2026
36AQI (US)
36AQI (US)
12th February 2026
29AQI (US)
29AQI (US)
13th February 2026
50AQI (US)
50AQI (US)
14th February 2026
86AQI (US)
86AQI (US)
15th February 2026
82AQI (US)
82AQI (US)
16th February 2026
104AQI (US)
104AQI (US)
17th February 2026
118AQI (US)
118AQI (US)
18th February 2026
64AQI (US)
64AQI (US)
19th February 2026
48AQI (US)
48AQI (US)
20th February 2026
51AQI (US)
51AQI (US)
21st February 2026
42AQI (US)
42AQI (US)
22nd February 2026
34AQI (US)
34AQI (US)
23rd February 2026
34AQI (US)
34AQI (US)
24th February 2026
44AQI (US)
44AQI (US)
25th February 2026
58AQI (US)
58AQI (US)
26th February 2026
30AQI (US)
30AQI (US)
27th February 2026
75AQI (US)
75AQI (US)
28th February 2026
36AQI (US)
36AQI (US)
1st March 2026
28AQI (US)
28AQI (US)
2nd March 2026
38AQI (US)
38AQI (US)
3rd March 2026
62AQI (US)
62AQI (US)
4th March 2026
99AQI (US)
99AQI (US)
5th March 2026
79AQI (US)
79AQI (US)
6th March 2026
62AQI (US)
62AQI (US)
7th March 2026
83AQI (US)
83AQI (US)
8th March 2026
30AQI (US)
30AQI (US)
9th March 2026
30AQI (US)
30AQI (US)
10th March 2026
62AQI (US)
62AQI (US)
11th March 2026
40AQI (US)
40AQI (US)
12th March 2026
28AQI (US)
28AQI (US)
13th March 2026
42AQI (US)
42AQI (US)
14th March 2026
27AQI (US)
27AQI (US)
15th March 2026
29AQI (US)
29AQI (US)
16th March 2026
28AQI (US)
28AQI (US)
17th March 2026
34AQI (US)
34AQI (US)
18th March 2026
36AQI (US)
36AQI (US)
19th March 2026
68AQI (US)
68AQI (US)
20th March 2026
83AQI (US)
83AQI (US)
21st March 2026
44AQI (US)
44AQI (US)
22nd March 2026
60AQI (US)
60AQI (US)
23rd March 2026
30AQI (US)
30AQI (US)
24th March 2026
30AQI (US)
30AQI (US)
25th March 2026
50AQI (US)
50AQI (US)
26th March 2026
64AQI (US)
64AQI (US)
27th March 2026
26AQI (US)
26AQI (US)
28th March 2026
25AQI (US)
25AQI (US)
29th March 2026
42AQI (US)
42AQI (US)
30th March 2026
48AQI (US)
48AQI (US)
31st March 2026
67AQI (US)
67AQI (US)
1st April 2026
28AQI (US)
28AQI (US)
2nd April 2026
29AQI (US)
29AQI (US)
3rd April 2026
44AQI (US)
44AQI (US)
4th April 2026
32AQI (US)
32AQI (US)
5th April 2026
28AQI (US)
28AQI (US)
6th April 2026
30AQI (US)
30AQI (US)
7th April 2026
22AQI (US)
22AQI (US)
8th April 2026
40AQI (US)
40AQI (US)
9th April 2026
54AQI (US)
54AQI (US)
10th April 2026
34AQI (US)
34AQI (US)
11th April 2026
32AQI (US)
32AQI (US)
12th April 2026
52AQI (US)
52AQI (US)
13th April 2026
50AQI (US)
50AQI (US)
14th April 2026
54AQI (US)
54AQI (US)
15th April 2026
44AQI (US)
44AQI (US)
16th April 2026
50AQI (US)
50AQI (US)
17th April 2026
18th April 2026
42AQI (US)
42AQI (US)
19th April 2026
26AQI (US)
26AQI (US)
20th April 2026
21AQI (US)
21AQI (US)
21st April 2026
36AQI (US)
36AQI (US)
22nd April 2026
23rd April 2026
41AQI (US)
41AQI (US)
24th April 2026
26AQI (US)
26AQI (US)
25th April 2026
26AQI (US)
26AQI (US)
26th April 2026
26AQI (US)
26AQI (US)
27th April 2026
24AQI (US)
24AQI (US)
28th April 2026
32AQI (US)
32AQI (US)
29th April 2026
28AQI (US)
28AQI (US)
30th April 2026
22AQI (US)
22AQI (US)
1st May 2026
20AQI (US)
20AQI (US)
2nd May 2026
20AQI (US)
20AQI (US)
3rd May 2026
36AQI (US)
36AQI (US)
4th May 2026
38AQI (US)
38AQI (US)
5th May 2026
35AQI (US)
35AQI (US)
6th May 2026
38AQI (US)
38AQI (US)
7th May 2026
28AQI (US)
28AQI (US)
8th May 2026
35AQI (US)
35AQI (US)
9th May 2026
10th May 2026
24AQI (US)
24AQI (US)
11th May 2026
25AQI (US)
25AQI (US)
12th May 2026
28AQI (US)
28AQI (US)
13th May 2026
41AQI (US)
41AQI (US)
14th May 2026
20AQI (US)
20AQI (US)
15th May 2026
32AQI (US)
32AQI (US)
16th May 2026
58AQI (US)
58AQI (US)
17th May 2026
70AQI (US)
70AQI (US)
18th May 2026
66AQI (US)
66AQI (US)
19th May 2026
46AQI (US)
46AQI (US)
20th May 2026
54AQI (US)
54AQI (US)
21st May 2026
32AQI (US)
32AQI (US)
22nd May 2026
30AQI (US)
30AQI (US)
23rd May 2026
37AQI (US)
37AQI (US)
24th May 2026
38AQI (US)
38AQI (US)
25th May 2026
47AQI (US)
47AQI (US)
26th May 2026
26AQI (US)
26AQI (US)
27th May 2026
28AQI (US)
28AQI (US)
28th May 2026
24AQI (US)
24AQI (US)
29th May 2026
24AQI (US)
24AQI (US)
30th May 2026
24AQI (US)
24AQI (US)
31st May 2026
32AQI (US)
32AQI (US)
1st June 2026
23AQI (US)
23AQI (US)
2nd June 2026
28AQI (US)
28AQI (US)
3rd June 2026
30AQI (US)
30AQI (US)
4th June 2026
31AQI (US)
31AQI (US)
5th June 2026
50AQI (US)
50AQI (US)
6th June 2026
48AQI (US)
48AQI (US)
7th June 2026
41AQI (US)
41AQI (US)
8th June 2026
33AQI (US)
33AQI (US)
9th June 2026
55AQI (US)
55AQI (US)
10th June 2026
50AQI (US)
50AQI (US)
11th June 2026
42AQI (US)
42AQI (US)
12th June 2026
25AQI (US)
25AQI (US)
13th June 2026
24AQI (US)
24AQI (US)
14th June 2026
26AQI (US)
26AQI (US)
15th June 2026
20AQI (US)
20AQI (US)
16th June 2026
22AQI (US)
22AQI (US)
17th June 2026
36AQI (US)
36AQI (US)
18th June 2026
34AQI (US)
34AQI (US)
19th June 2026
25AQI (US)
25AQI (US)
20th June 2026
18AQI (US)
18AQI (US)
21st June 2026
20AQI (US)
20AQI (US)
22nd June 2026
26AQI (US)
26AQI (US)
23rd June 2026
24AQI (US)
24AQI (US)
24th June 2026
22AQI (US)
22AQI (US)
25th June 2026
42AQI (US)
42AQI (US)
26th June 2026
38AQI (US)
38AQI (US)
27th June 2026
42AQI (US)
42AQI (US)
28th June 2026
41AQI (US)
41AQI (US)
29th June 2026
47AQI (US)
47AQI (US)
30th June 2026
61AQI (US)
61AQI (US)
1st July 2026
56AQI (US)
56AQI (US)
2nd July 2026
52AQI (US)
52AQI (US)
3rd July 2026
42AQI (US)
42AQI (US)
4th July 2026
45AQI (US)
45AQI (US)
5th July 2026
58AQI (US)
58AQI (US)
6th July 2026
48AQI (US)
48AQI (US)
7th July 2026
35AQI (US)
35AQI (US)
8th July 2026
36AQI (US)
36AQI (US)
9th July 2026
50AQI (US)
50AQI (US)
10th July 2026
34AQI (US)
34AQI (US)
11th July 2026
64AQI (US)
64AQI (US)
12th July 2026
72AQI (US)
72AQI (US)
13th July 2026
68AQI (US)
68AQI (US)
14th July 2026
58AQI (US)
58AQI (US)
15th July 2026
164AQI (US)
164AQI (US)
16th July 2026
242AQI (US)
242AQI (US)
17th July 2026
238AQI (US)
238AQI (US)
18th July 2026
132AQI (US)
132AQI (US)
19th July 2026
64AQI (US)
64AQI (US)
20th July 2026
62AQI (US)
62AQI (US)
21st July 2026
77AQI (US)
77AQI (US)
22nd July 2026
19AQI (US)
19AQI (US)
23rd July 2026
24AQI (US)
24AQI (US)
24th July 2026
31AQI (US)
31AQI (US)
25th July 2026
39AQI (US)
39AQI (US)
26th July 2026
50AQI (US)
50AQI (US)
27th July 2026
60AQI (US)
60AQI (US)
28th July 2026
61AQI (US)
61AQI (US)
29th July 2026
30th July 2026
31st July 2026
1st August 2026
2nd August 2026
3rd August 2026
4th August 2026
5th August 2026
6th August 2026
7th August 2026
8th August 2026
9th August 2026
10th August 2026
11th August 2026
12th August 2026
13th August 2026
14th August 2026
15th August 2026
16th August 2026
17th August 2026
18th August 2026
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
30th September 2026
1st October 2026
2nd October 2026
3rd October 2026
4th October 2026
5th October 2026
6th October 2026
7th October 2026
8th October 2026
9th October 2026
10th October 2026
11th October 2026
12th October 2026
13th October 2026
14th October 2026
15th October 2026
16th October 2026
17th October 2026
18th October 2026
19th October 2026
20th October 2026
21st October 2026
22nd October 2026
23rd October 2026
24th October 2026
25th October 2026
26th October 2026
27th October 2026
28th October 2026
29th October 2026
30th October 2026
31st October 2026
1st November 2026
2nd November 2026
3rd November 2026
4th November 2026
5th November 2026
6th November 2026
7th November 2026
8th November 2026
9th November 2026
10th November 2026
11th November 2026
12th November 2026
13th November 2026
14th November 2026
15th November 2026
16th November 2026
17th November 2026
18th November 2026
19th November 2026
20th November 2026
21st November 2026
22nd November 2026
23rd November 2026
24th November 2026
25th November 2026
26th November 2026
27th November 2026
28th November 2026
29th November 2026
30th November 2026
1st December 2026
2nd December 2026
3rd December 2026
4th December 2026
5th December 2026
6th December 2026
7th December 2026
8th December 2026
9th December 2026
10th December 2026
11th December 2026
12th December 2026
13th December 2026
14th December 2026
15th December 2026
16th December 2026
17th December 2026
18th December 2026
19th December 2026
20th December 2026
21st December 2026
22nd December 2026
23rd December 2026
24th December 2026
25th December 2026
26th December 2026
27th December 2026
28th December 2026
29th December 2026
30th December 2026
31st December 2026
39AQI (US)
56AQI (US)
48AQI (US)
35AQI (US)
35AQI (US)
34AQI (US)
71AQI (US)
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202645AQI (US)
26
5
16
10
2
20
11
25
3
26
4
28
2
12
12
1
1
2
153
47
3
1
2
Highest AQI (US) recorded in
July71AQI (US)
Lowest AQI (US) recorded in
June34AQI (US)
202535AQI (US)
29
2
23
5
29
2
30
31
19
11
24
7
17
11
3
28
2
28
3
25
5
23
8
306
56
3
Highest AQI (US) recorded in
August48AQI (US)
Lowest AQI (US) recorded in
May24AQI (US)
202433AQI (US)
27
4
24
5
31
30
29
2
25
3
29
2
24
7
23
7
28
3
30
30
1
330
34
Highest AQI (US) recorded in
January37AQI (US)
Lowest AQI (US) recorded in
November25AQI (US)
202342AQI (US)
24
7
22
6
25
6
25
5
29
2
10
14
6
21
10
19
12
28
2
29
2
25
4
24
7
281
77
6
Highest AQI (US) recorded in
June72AQI (US)
Lowest AQI (US) recorded in
October30AQI (US)
202235AQI (US)
25
5
19
2
27
4
29
27
4
24
6
19
5
1
25
3
29
2
25
5
26
5
276
41
Highest AQI (US) recorded in
June39AQI (US)
Lowest AQI (US) recorded in
August17AQI (US)
202137AQI (US)
23
5
1
25
3
27
4
28
2
25
6
25
5
23
8
23
8
26
4
28
3
25
5
27
4
305
57
1
Highest AQI (US) recorded in
July46AQI (US)
Lowest AQI (US) recorded in
October30AQI (US)
202032AQI (US)
11
2
21
18
29
1
31
31
28
2
31
26
4
25
6
251
15
Highest AQI (US) recorded in
November35AQI (US)
Lowest AQI (US) recorded in
October24AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Most Polluted Year Recorded
2026(Avg.)
45AQI (US)Least Polluted Year Recorded
2020(Avg.)
32AQI (US)Waterloo's annual 2026 AQI (US) (45) shows an average percentage change of 27.1% (worsened AQI (US)) compared to previous years: 2020 (32), 2021 (37), 2022 (35), 2023 (42), 2024 (33), 2025 (35).
