Country Background

Waterloo, Iowa, United States 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+

October Air Quality Analysis

Waterloo, Iowa, United States

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
30th Oct 2022
79AQI
Lowest AQI recorded on
25th Oct 2021
15AQI


Same Day Analysis (17th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 60 of Moderate air quality on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 17th Oct - 18th Oct 2025

Waterloo, Iowa, United States

AQI
Day
Night
.

7 AM17th Oct 2025

6 PM

6 AM18th Oct 2025

Day time
Avg. Highest Time
2PM17th Oct

59AQI

Avg. Lowest Time
10AM17th Oct

31AQI

Night time
Avg. Highest Time
7PM17th Oct

61AQI

Avg. Lowest Time
5AM18th Oct

41AQI

In the last 24 hours,

Waterloo's AQI reached its highest point of 61 at 7 PM during the Night, while the lowest point, 31, was recorded at 10 AM during the Day between 17th Oct and 18th Oct 2025.

Day & Night AQI Trend : Sep - Oct 2025

Waterloo, Iowa, United States

SepOct
18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th
Day
Night
18th Sep 2025347 AMAQI
18th Sep 2025398 AMAQI
18th Sep 2025419 AMAQI
18th Sep 20253810 AMAQI
18th Sep 20253811 AMAQI
18th Sep 20253712 PMAQI
18th Sep 2025351 PMAQI
18th Sep 2025382 PMAQI
18th Sep 2025423 PMAQI
18th Sep 2025434 PMAQI
18th Sep 2025435 PMAQI
18th Sep 2025436 PMAQI
18th Sep 2025407 PMAQI
18th Sep 2025408 PMAQI
18th Sep 2025419 PMAQI
18th Sep 20254110 PMAQI
18th Sep 20254111 PMAQI
19th Sep 20254012 AMAQI
19th Sep 2025381 AMAQI
19th Sep 2025352 AMAQI
19th Sep 2025303 AMAQI
19th Sep 2025244 AMAQI
19th Sep 2025265 AMAQI
19th Sep 2025266 AMAQI

22°C16/30°C

19th Sep 2025257 AMAQI
19th Sep 2025248 AMAQI
19th Sep 2025289 AMAQI
19th Sep 20252710 AMAQI
19th Sep 20252611 AMAQI
19th Sep 20252612 PMAQI
19th Sep 2025271 PMAQI
19th Sep 2025292 PMAQI
19th Sep 2025293 PMAQI
19th Sep 2025294 PMAQI
19th Sep 2025305 PMAQI
19th Sep 2025296 PMAQI
19th Sep 2025297 PMAQI
19th Sep 2025308 PMAQI
19th Sep 2025309 PMAQI
19th Sep 20253010 PMAQI
19th Sep 20253011 PMAQI
20th Sep 20252812 AMAQI
20th Sep 2025271 AMAQI
20th Sep 2025242 AMAQI
20th Sep 2025203 AMAQI
20th Sep 2025204 AMAQI
20th Sep 2025225 AMAQI
20th Sep 2025256 AMAQI

20°C18/24°C

20th Sep 2025237 AMAQI
20th Sep 2025238 AMAQI
20th Sep 2025239 AMAQI
20th Sep 20252310 AMAQI
20th Sep 20252311 AMAQI
20th Sep 20252612 PMAQI
20th Sep 2025251 PMAQI
20th Sep 2025232 PMAQI
20th Sep 2025233 PMAQI
20th Sep 2025254 PMAQI
20th Sep 2025255 PMAQI
20th Sep 2025246 PMAQI
20th Sep 2025247 PMAQI
20th Sep 2025238 PMAQI
20th Sep 2025259 PMAQI
20th Sep 20252410 PMAQI
20th Sep 20252311 PMAQI
21st Sep 20252312 AMAQI
21st Sep 2025241 AMAQI
21st Sep 2025222 AMAQI
21st Sep 2025223 AMAQI
21st Sep 2025204 AMAQI
21st Sep 2025245 AMAQI
21st Sep 2025246 AMAQI

19°C14/23°C

21st Sep 2025267 AMAQI
21st Sep 2025258 AMAQI
21st Sep 2025259 AMAQI
21st Sep 20252610 AMAQI
21st Sep 20252611 AMAQI
21st Sep 20252412 PMAQI
21st Sep 2025241 PMAQI
21st Sep 2025262 PMAQI
21st Sep 2025263 PMAQI
21st Sep 2025264 PMAQI
21st Sep 2025275 PMAQI
21st Sep 2025286 PMAQI
21st Sep 2025277 PMAQI
21st Sep 2025288 PMAQI
21st Sep 2025299 PMAQI
21st Sep 20252810 PMAQI
21st Sep 20253111 PMAQI
22nd Sep 20253012 AMAQI
22nd Sep 2025301 AMAQI
22nd Sep 2025282 AMAQI
22nd Sep 2025263 AMAQI
22nd Sep 2025244 AMAQI
22nd Sep 2025245 AMAQI
22nd Sep 2025276 AMAQI

19°C15/27°C

22nd Sep 2025297 AMAQI
22nd Sep 2025288 AMAQI
22nd Sep 2025309 AMAQI
22nd Sep 20253110 AMAQI
22nd Sep 20253111 AMAQI
22nd Sep 20253012 PMAQI
22nd Sep 2025311 PMAQI
22nd Sep 2025332 PMAQI
22nd Sep 2025343 PMAQI
22nd Sep 2025314 PMAQI
22nd Sep 2025305 PMAQI
22nd Sep 2025306 PMAQI
22nd Sep 2025317 PMAQI
22nd Sep 2025318 PMAQI
22nd Sep 2025309 PMAQI
22nd Sep 20252910 PMAQI
22nd Sep 20252911 PMAQI
23rd Sep 20253112 AMAQI
23rd Sep 2025301 AMAQI
23rd Sep 2025302 AMAQI
23rd Sep 2025343 AMAQI
23rd Sep 2025284 AMAQI
23rd Sep 2025235 AMAQI
23rd Sep 2025236 AMAQI

20°C16/28°C

23rd Sep 2025237 AMAQI
23rd Sep 2025248 AMAQI
23rd Sep 2025289 AMAQI
23rd Sep 20253110 AMAQI
23rd Sep 20253311 AMAQI
23rd Sep 20253112 PMAQI
23rd Sep 2025271 PMAQI
23rd Sep 2025282 PMAQI
23rd Sep 2025303 PMAQI
23rd Sep 2025304 PMAQI
23rd Sep 2025285 PMAQI
23rd Sep 2025296 PMAQI
23rd Sep 2025297 PMAQI
23rd Sep 2025308 PMAQI
23rd Sep 2025319 PMAQI
23rd Sep 20252910 PMAQI
23rd Sep 20252711 PMAQI
24th Sep 20252812 AMAQI
24th Sep 2025281 AMAQI
24th Sep 2025302 AMAQI
24th Sep 2025323 AMAQI
24th Sep 2025324 AMAQI
24th Sep 2025305 AMAQI
24th Sep 2025336 AMAQI

19°C14/26°C

24th Sep 2025337 AMAQI
24th Sep 2025338 AMAQI
24th Sep 2025339 AMAQI
24th Sep 20253210 AMAQI
24th Sep 20253111 AMAQI
24th Sep 20253112 PMAQI
24th Sep 2025311 PMAQI
24th Sep 2025292 PMAQI
24th Sep 2025313 PMAQI
24th Sep 2025294 PMAQI
24th Sep 2025295 PMAQI
24th Sep 2025286 PMAQI
24th Sep 2025287 PMAQI
24th Sep 2025288 PMAQI
24th Sep 2025289 PMAQI
24th Sep 20252910 PMAQI
24th Sep 20252811 PMAQI
25th Sep 20252312 AMAQI
25th Sep 2025211 AMAQI
25th Sep 2025222 AMAQI
25th Sep 2025303 AMAQI
25th Sep 2025264 AMAQI
25th Sep 2025225 AMAQI
25th Sep 2025276 AMAQI

18°C13/24°C

25th Sep 2025297 AMAQI
25th Sep 2025298 AMAQI
25th Sep 2025289 AMAQI
25th Sep 20252710 AMAQI
25th Sep 20252911 AMAQI
25th Sep 20252812 PMAQI
25th Sep 2025251 PMAQI
25th Sep 2025262 PMAQI
25th Sep 2025283 PMAQI
25th Sep 2025294 PMAQI
25th Sep 2025305 PMAQI
25th Sep 2025296 PMAQI
25th Sep 2025307 PMAQI
25th Sep 2025278 PMAQI
25th Sep 2025259 PMAQI
25th Sep 20253310 PMAQI
25th Sep 20253911 PMAQI
26th Sep 20253712 AMAQI
26th Sep 2025301 AMAQI
26th Sep 2025312 AMAQI
26th Sep 2025343 AMAQI
26th Sep 2025304 AMAQI
26th Sep 2025235 AMAQI
26th Sep 2025306 AMAQI

18°C9/28°C

26th Sep 2025327 AMAQI
26th Sep 2025338 AMAQI
26th Sep 2025339 AMAQI
26th Sep 20252810 AMAQI
26th Sep 20253211 AMAQI
26th Sep 20254012 PMAQI
26th Sep 2025421 PMAQI
26th Sep 2025372 PMAQI
26th Sep 2025353 PMAQI
26th Sep 2025354 PMAQI
26th Sep 2025355 PMAQI
26th Sep 2025366 PMAQI
26th Sep 2025357 PMAQI
26th Sep 2025328 PMAQI
26th Sep 2025309 PMAQI
26th Sep 20253110 PMAQI
26th Sep 20253311 PMAQI
27th Sep 20253812 AMAQI
27th Sep 2025411 AMAQI
27th Sep 2025412 AMAQI
27th Sep 2025453 AMAQI
27th Sep 2025424 AMAQI
27th Sep 2025395 AMAQI
27th Sep 2025396 AMAQI

21°C12/33°C

27th Sep 2025387 AMAQI
27th Sep 2025358 AMAQI
27th Sep 2025349 AMAQI
27th Sep 20253210 AMAQI
27th Sep 20253111 AMAQI
27th Sep 20252512 PMAQI
27th Sep 2025261 PMAQI
27th Sep 2025242 PMAQI
27th Sep 2025253 PMAQI
27th Sep 2025254 PMAQI
27th Sep 2025285 PMAQI
27th Sep 2025356 PMAQI
27th Sep 2025377 PMAQI
27th Sep 2025358 PMAQI
27th Sep 2025379 PMAQI
27th Sep 20253610 PMAQI
27th Sep 20253211 PMAQI
28th Sep 20253212 AMAQI
28th Sep 2025331 AMAQI
28th Sep 2025292 AMAQI
28th Sep 2025283 AMAQI
28th Sep 2025354 AMAQI
28th Sep 2025285 AMAQI
28th Sep 2025266 AMAQI

22°C14/32°C

28th Sep 2025267 AMAQI
28th Sep 2025278 AMAQI
28th Sep 2025279 AMAQI
28th Sep 20252410 AMAQI
28th Sep 20252511 AMAQI
28th Sep 20252812 PMAQI
28th Sep 2025301 PMAQI
28th Sep 2025292 PMAQI
28th Sep 2025253 PMAQI
28th Sep 2025324 PMAQI
28th Sep 2025305 PMAQI
28th Sep 2025256 PMAQI
28th Sep 2025277 PMAQI
28th Sep 2025288 PMAQI
28th Sep 2025329 PMAQI
28th Sep 20254710 PMAQI
28th Sep 20254211 PMAQI
29th Sep 20253712 AMAQI
29th Sep 2025411 AMAQI
29th Sep 2025422 AMAQI
29th Sep 2025353 AMAQI
29th Sep 2025294 AMAQI
29th Sep 2025265 AMAQI
29th Sep 2025236 AMAQI

19°C8/30°C

29th Sep 2025307 AMAQI
29th Sep 2025328 AMAQI
29th Sep 2025379 AMAQI
29th Sep 20253410 AMAQI
29th Sep 20253411 AMAQI
29th Sep 20254112 PMAQI
29th Sep 2025321 PMAQI
29th Sep 2025252 PMAQI
29th Sep 2025273 PMAQI
29th Sep 2025284 PMAQI
29th Sep 2025265 PMAQI
29th Sep 2025266 PMAQI
29th Sep 2025317 PMAQI
29th Sep 2025288 PMAQI
29th Sep 2025319 PMAQI
29th Sep 20253710 PMAQI
29th Sep 20254011 PMAQI
30th Sep 20255012 AMAQI
30th Sep 2025511 AMAQI
30th Sep 2025422 AMAQI
30th Sep 2025363 AMAQI
30th Sep 2025424 AMAQI
30th Sep 2025515 AMAQI
30th Sep 2025426 AMAQI

23°C13/33°C

30th Sep 2025417 AMAQI
30th Sep 2025448 AMAQI
30th Sep 2025439 AMAQI
30th Sep 20253910 AMAQI
30th Sep 20253511 AMAQI
30th Sep 20252912 PMAQI
30th Sep 2025391 PMAQI
30th Sep 2025402 PMAQI
30th Sep 2025363 PMAQI
30th Sep 2025324 PMAQI
30th Sep 2025305 PMAQI
30th Sep 2025346 PMAQI
30th Sep 2025377 PMAQI
30th Sep 2025398 PMAQI
30th Sep 2025459 PMAQI
30th Sep 20254710 PMAQI
30th Sep 20254611 PMAQI
1st Oct 20254612 AMAQI
1st Oct 2025471 AMAQI
1st Oct 2025482 AMAQI
1st Oct 2025493 AMAQI
1st Oct 2025434 AMAQI
1st Oct 2025455 AMAQI
1st Oct 2025426 AMAQI

22°C12/33°C

1st Oct 2025437 AMAQI
1st Oct 2025398 AMAQI
1st Oct 2025359 AMAQI
1st Oct 20253610 AMAQI
1st Oct 20254311 AMAQI
1st Oct 20253912 PMAQI
1st Oct 2025341 PMAQI
1st Oct 2025422 PMAQI
1st Oct 2025443 PMAQI
1st Oct 2025434 PMAQI
1st Oct 2025435 PMAQI
1st Oct 2025436 PMAQI
1st Oct 2025417 PMAQI
1st Oct 2025428 PMAQI
1st Oct 2025469 PMAQI
1st Oct 20254010 PMAQI
1st Oct 20254911 PMAQI
2nd Oct 20254512 AMAQI
2nd Oct 2025471 AMAQI
2nd Oct 2025462 AMAQI
2nd Oct 2025413 AMAQI
2nd Oct 2025394 AMAQI
2nd Oct 2025315 AMAQI
2nd Oct 2025336 AMAQI

22°C16/30°C

2nd Oct 2025347 AMAQI
2nd Oct 2025408 AMAQI
2nd Oct 2025419 AMAQI
2nd Oct 20254310 AMAQI
2nd Oct 20254711 AMAQI
2nd Oct 20254512 PMAQI
2nd Oct 2025461 PMAQI
2nd Oct 2025492 PMAQI
2nd Oct 2025473 PMAQI
2nd Oct 2025444 PMAQI
2nd Oct 2025435 PMAQI
2nd Oct 2025476 PMAQI
2nd Oct 2025447 PMAQI
2nd Oct 2025408 PMAQI
2nd Oct 2025479 PMAQI
2nd Oct 20255110 PMAQI
2nd Oct 20255011 PMAQI
3rd Oct 20255412 AMAQI
3rd Oct 2025581 AMAQI
3rd Oct 2025572 AMAQI
3rd Oct 2025643 AMAQI
3rd Oct 2025594 AMAQI
3rd Oct 2025565 AMAQI
3rd Oct 2025486 AMAQI

22°C13/32°C

3rd Oct 2025527 AMAQI
3rd Oct 2025538 AMAQI
3rd Oct 2025549 AMAQI
3rd Oct 20255310 AMAQI
3rd Oct 20255411 AMAQI
3rd Oct 20256112 PMAQI
3rd Oct 2025601 PMAQI
3rd Oct 2025592 PMAQI
3rd Oct 2025533 PMAQI
3rd Oct 2025534 PMAQI
3rd Oct 2025555 PMAQI
3rd Oct 2025526 PMAQI
3rd Oct 2025507 PMAQI
3rd Oct 2025518 PMAQI
3rd Oct 2025569 PMAQI
3rd Oct 20256710 PMAQI
3rd Oct 20256711 PMAQI
4th Oct 20256412 AMAQI
4th Oct 2025691 AMAQI
4th Oct 2025672 AMAQI
4th Oct 2025663 AMAQI
4th Oct 2025604 AMAQI
4th Oct 2025635 AMAQI
4th Oct 2025626 AMAQI

24°C16/34°C

4th Oct 2025597 AMAQI
4th Oct 2025608 AMAQI
4th Oct 2025579 AMAQI
4th Oct 20256010 AMAQI
4th Oct 20255611 AMAQI
4th Oct 20255912 PMAQI
4th Oct 2025561 PMAQI
4th Oct 2025532 PMAQI
4th Oct 2025543 PMAQI
4th Oct 2025524 PMAQI
4th Oct 2025525 PMAQI
4th Oct 2025516 PMAQI
4th Oct 2025567 PMAQI
4th Oct 2025598 PMAQI
4th Oct 2025629 PMAQI
4th Oct 20256210 PMAQI
4th Oct 20256011 PMAQI
5th Oct 20256012 AMAQI
5th Oct 2025581 AMAQI
5th Oct 2025562 AMAQI
5th Oct 2025523 AMAQI
5th Oct 2025464 AMAQI
5th Oct 2025505 AMAQI
5th Oct 2025456 AMAQI

24°C17/33°C

5th Oct 2025497 AMAQI
5th Oct 2025528 AMAQI
5th Oct 2025479 AMAQI
5th Oct 20255510 AMAQI
5th Oct 20254911 AMAQI
5th Oct 20255212 PMAQI
5th Oct 2025541 PMAQI
5th Oct 2025532 PMAQI
5th Oct 2025483 PMAQI
5th Oct 2025474 PMAQI
5th Oct 2025535 PMAQI
5th Oct 2025566 PMAQI
5th Oct 2025567 PMAQI
5th Oct 2025578 PMAQI
5th Oct 2025529 PMAQI
5th Oct 20255310 PMAQI
5th Oct 20255411 PMAQI
6th Oct 20255612 AMAQI
6th Oct 2025541 AMAQI
6th Oct 2025462 AMAQI
6th Oct 2025503 AMAQI
6th Oct 2025494 AMAQI
6th Oct 2025495 AMAQI
6th Oct 2025496 AMAQI

23°C16/31°C

6th Oct 2025447 AMAQI
6th Oct 2025448 AMAQI
6th Oct 2025499 AMAQI
6th Oct 20253310 AMAQI
6th Oct 20252811 AMAQI
6th Oct 20253412 PMAQI
6th Oct 2025531 PMAQI
7th Oct 2025156 AMAQI

15°C12/15°C

7th Oct 2025257 AMAQI
7th Oct 2025218 AMAQI
7th Oct 2025189 AMAQI
7th Oct 20252610 AMAQI
7th Oct 20253311 AMAQI
7th Oct 20254012 PMAQI
7th Oct 2025401 PMAQI
7th Oct 2025422 PMAQI
7th Oct 2025363 PMAQI
7th Oct 2025294 PMAQI
7th Oct 2025225 PMAQI
7th Oct 2025226 PMAQI
7th Oct 2025217 PMAQI
7th Oct 2025268 PMAQI
7th Oct 2025319 PMAQI
7th Oct 20254010 PMAQI
7th Oct 20254411 PMAQI
8th Oct 20254312 AMAQI
8th Oct 2025461 AMAQI
8th Oct 2025522 AMAQI
8th Oct 2025483 AMAQI
8th Oct 2025444 AMAQI
8th Oct 2025425 AMAQI
8th Oct 2025576 AMAQI

15°C8/23°C

8th Oct 2025467 AMAQI
8th Oct 2025358 AMAQI
8th Oct 2025509 AMAQI
8th Oct 20253810 AMAQI
8th Oct 20253011 AMAQI
8th Oct 20252312 PMAQI
8th Oct 2025231 PMAQI
8th Oct 2025292 PMAQI
8th Oct 2025323 PMAQI
8th Oct 2025274 PMAQI
8th Oct 2025275 PMAQI
8th Oct 2025276 PMAQI
8th Oct 2025327 PMAQI
8th Oct 2025478 PMAQI
8th Oct 2025309 PMAQI
8th Oct 20254810 PMAQI
8th Oct 20255411 PMAQI
9th Oct 20254012 AMAQI
9th Oct 2025331 AMAQI
9th Oct 2025472 AMAQI
9th Oct 2025553 AMAQI
9th Oct 2025474 AMAQI
9th Oct 2025425 AMAQI
9th Oct 2025366 AMAQI

12°C4/22°C

9th Oct 2025217 AMAQI
9th Oct 2025168 AMAQI
9th Oct 2025339 AMAQI
9th Oct 20254810 AMAQI
9th Oct 20254911 AMAQI
9th Oct 20254512 PMAQI
9th Oct 2025451 PMAQI
9th Oct 2025382 PMAQI
9th Oct 2025283 PMAQI
9th Oct 2025284 PMAQI
9th Oct 2025345 PMAQI
9th Oct 2025406 PMAQI
9th Oct 2025407 PMAQI
9th Oct 2025338 PMAQI
9th Oct 2025369 PMAQI
9th Oct 20254010 PMAQI
9th Oct 20253611 PMAQI
10th Oct 20254012 AMAQI
10th Oct 2025381 AMAQI
10th Oct 2025412 AMAQI
10th Oct 2025333 AMAQI
10th Oct 2025314 AMAQI
10th Oct 2025315 AMAQI
10th Oct 2025336 AMAQI

13°C4/24°C

10th Oct 2025377 AMAQI
10th Oct 2025328 AMAQI
10th Oct 2025329 AMAQI
10th Oct 20253210 AMAQI
10th Oct 20253511 AMAQI
10th Oct 20253812 PMAQI
10th Oct 2025391 PMAQI
10th Oct 2025372 PMAQI
10th Oct 2025393 PMAQI
10th Oct 2025384 PMAQI
10th Oct 2025375 PMAQI
10th Oct 2025356 PMAQI
10th Oct 2025347 PMAQI
10th Oct 2025328 PMAQI
10th Oct 2025389 PMAQI
10th Oct 20253710 PMAQI
10th Oct 20254711 PMAQI
11th Oct 20254512 AMAQI
11th Oct 2025511 AMAQI
11th Oct 2025512 AMAQI
11th Oct 2025523 AMAQI
11th Oct 2025484 AMAQI
11th Oct 2025475 AMAQI
11th Oct 2025416 AMAQI

18°C12/27°C

11th Oct 2025417 AMAQI
11th Oct 2025428 AMAQI
11th Oct 2025459 AMAQI
11th Oct 20254110 AMAQI
11th Oct 20253511 AMAQI
11th Oct 20253812 PMAQI
11th Oct 2025281 PMAQI
11th Oct 2025312 PMAQI
11th Oct 2025203 PMAQI
11th Oct 2025174 PMAQI
11th Oct 2025165 PMAQI
11th Oct 2025196 PMAQI
11th Oct 2025217 PMAQI
11th Oct 2025308 PMAQI
11th Oct 2025389 PMAQI
11th Oct 20255110 PMAQI
11th Oct 20254911 PMAQI
12th Oct 20254412 AMAQI
12th Oct 2025431 AMAQI
12th Oct 2025502 AMAQI
12th Oct 2025523 AMAQI
12th Oct 2025504 AMAQI
12th Oct 2025505 AMAQI
12th Oct 2025506 AMAQI

14°C5/24°C

12th Oct 2025447 AMAQI
12th Oct 2025388 AMAQI
12th Oct 2025389 AMAQI
12th Oct 20253010 AMAQI
12th Oct 20252811 AMAQI
12th Oct 20253212 PMAQI
12th Oct 2025331 PMAQI
12th Oct 2025402 PMAQI
12th Oct 2025383 PMAQI
12th Oct 2025364 PMAQI
12th Oct 2025345 PMAQI
12th Oct 2025376 PMAQI
12th Oct 2025467 PMAQI
12th Oct 2025368 PMAQI
12th Oct 2025539 PMAQI
12th Oct 20254610 PMAQI
12th Oct 20254311 PMAQI
13th Oct 20254412 AMAQI
13th Oct 2025461 AMAQI
13th Oct 2025482 AMAQI
13th Oct 2025543 AMAQI
13th Oct 2025514 AMAQI
13th Oct 2025425 AMAQI
13th Oct 2025496 AMAQI

18°C10/27°C

13th Oct 2025487 AMAQI
13th Oct 2025498 AMAQI
13th Oct 2025509 AMAQI
13th Oct 20254610 AMAQI
13th Oct 20254411 AMAQI
13th Oct 20254512 PMAQI
13th Oct 2025331 PMAQI
13th Oct 2025402 PMAQI
13th Oct 2025423 PMAQI
13th Oct 2025304 PMAQI
13th Oct 2025365 PMAQI
13th Oct 2025376 PMAQI
13th Oct 2025367 PMAQI
13th Oct 2025278 PMAQI
13th Oct 2025539 PMAQI
13th Oct 20255710 PMAQI
13th Oct 20255811 PMAQI
14th Oct 20255412 AMAQI
14th Oct 2025521 AMAQI
14th Oct 2025412 AMAQI
14th Oct 2025373 AMAQI
14th Oct 2025334 AMAQI
14th Oct 2025315 AMAQI
14th Oct 2025336 AMAQI

18°C13/25°C

14th Oct 2025307 AMAQI
14th Oct 2025338 AMAQI
14th Oct 2025289 AMAQI
14th Oct 20253610 AMAQI
14th Oct 20253911 AMAQI
14th Oct 20253712 PMAQI
14th Oct 2025451 PMAQI
14th Oct 2025462 PMAQI
14th Oct 2025383 PMAQI
14th Oct 2025404 PMAQI
14th Oct 2025395 PMAQI
14th Oct 2025336 PMAQI
14th Oct 2025347 PMAQI
14th Oct 2025368 PMAQI
14th Oct 2025359 PMAQI
14th Oct 20253110 PMAQI
14th Oct 20253311 PMAQI
15th Oct 20253812 AMAQI
15th Oct 2025401 AMAQI
15th Oct 2025362 AMAQI
15th Oct 2025323 AMAQI
15th Oct 2025324 AMAQI
15th Oct 2025275 AMAQI
15th Oct 2025336 AMAQI

13°C8/19°C

15th Oct 2025357 AMAQI
15th Oct 2025328 AMAQI
15th Oct 2025349 AMAQI
15th Oct 20252110 AMAQI
15th Oct 20251511 AMAQI
15th Oct 20251612 PMAQI
15th Oct 2025211 PMAQI
15th Oct 2025242 PMAQI
15th Oct 2025263 PMAQI
15th Oct 2025254 PMAQI
15th Oct 2025305 PMAQI
15th Oct 2025306 PMAQI
15th Oct 2025267 PMAQI
15th Oct 2025238 PMAQI
15th Oct 2025269 PMAQI
15th Oct 20252710 PMAQI
15th Oct 20252511 PMAQI
16th Oct 20253712 AMAQI
16th Oct 2025361 AMAQI
16th Oct 2025372 AMAQI
16th Oct 2025353 AMAQI
16th Oct 2025404 AMAQI
16th Oct 2025285 AMAQI
16th Oct 2025266 AMAQI

14°C13/17°C

16th Oct 2025337 AMAQI
16th Oct 2025378 AMAQI
16th Oct 2025379 AMAQI
16th Oct 20253010 AMAQI
16th Oct 20253511 AMAQI
16th Oct 20254112 PMAQI
16th Oct 2025381 PMAQI
16th Oct 2025352 PMAQI
16th Oct 2025293 PMAQI
16th Oct 2025334 PMAQI
16th Oct 2025295 PMAQI
16th Oct 2025316 PMAQI
16th Oct 2025467 PMAQI
16th Oct 2025468 PMAQI
16th Oct 2025409 PMAQI
16th Oct 20254510 PMAQI
16th Oct 20254811 PMAQI
17th Oct 20255012 AMAQI
17th Oct 2025501 AMAQI
17th Oct 2025492 AMAQI
17th Oct 2025453 AMAQI
17th Oct 2025444 AMAQI
17th Oct 2025435 AMAQI
17th Oct 2025406 AMAQI

17°C12/23°C

17th Oct 2025367 AMAQI
17th Oct 2025388 AMAQI
17th Oct 2025459 AMAQI
17th Oct 20253110 AMAQI
17th Oct 20255311 AMAQI
17th Oct 20255712 PMAQI
17th Oct 2025581 PMAQI
17th Oct 2025592 PMAQI
17th Oct 2025553 PMAQI
17th Oct 2025534 PMAQI
17th Oct 2025445 PMAQI
17th Oct 2025556 PMAQI
17th Oct 2025617 PMAQI
17th Oct 2025528 PMAQI
17th Oct 2025509 PMAQI
17th Oct 20255610 PMAQI
17th Oct 20255611 PMAQI
18th Oct 20255412 AMAQI
18th Oct 2025501 AMAQI
18th Oct 2025532 AMAQI
18th Oct 2025533 AMAQI
18th Oct 2025534 AMAQI
18th Oct 2025415 AMAQI
18th Oct 2025476 AMAQI

21°C17/28°C

18th Oct 2025357 AMAQI
7 AM
18th Oct 2025488 AMAQI
18th Oct 2025349 AMAQI
18th Oct 20255010 AMAQI
18th Oct 20254611 AMAQI
18th Oct 20255412 PMAQI
12 PM
18th Oct 2025541 PMAQI
18th Oct 2025522 PMAQI
18th Oct 2025523 PMAQI
18th Oct 2025514 PMAQI
18th Oct 2025575 PMAQI
6 PM
12 AM
6 AM

--°C/°C

Day time
Avg. Highest Time
7 AM - 6 PM

36AQI

12 hours / Day
360 hours / Month
Avg. Lowest Time
7 AM - 6 PM

36AQI

12 hours / Day
360 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 7 AM to 6 PM (Avg. 36), while the lowest AQI was between 7 AM to 6 PM (Avg. 36).
Night time
Avg. Highest Time
12 AM - 3 AM

42AQI

4 hours / Day
120 hours / Month
Avg. Lowest Time
5 AM - 8 PM

36AQI

4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 3 AM (Avg. 42), while the lowest AQI was between 5 AM to 8 PM (Avg. 36).

2025 Days Vs Air Quality

Waterloo, Iowa, United States

2025

82%

238

17%

50

0.6%

2

Total number of days with different AQI categories in last 291 days in 2025 (74 days remaining)

Good
238 Days
Moderate
50 Days
Poor
2 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days



Under WHO’s Safe Air Quality Limits: 82%

Health Risk Level:

Low

In 2025, 82% of 291 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, Iowa, United States

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.

-1th undefined 2025
-1th undefined 2025
-1th undefined 2025
1st January 2025
27AQI
2nd January 2025
33AQI
3rd January 2025
27AQI
4th January 2025
22AQI
5th January 2025
21AQI
6th January 2025
23AQI
7th January 2025
32AQI
8th January 2025
36AQI
9th January 2025
54AQI
10th January 2025
39AQI
11th January 2025
30AQI
12th January 2025
39AQI
13th January 2025
23AQI
14th January 2025
32AQI
15th January 2025
33AQI
16th January 2025
29AQI
17th January 2025
30AQI
18th January 2025
21AQI
19th January 2025
23AQI
20th January 2025
26AQI
21st January 2025
24AQI
22nd January 2025
28AQI
23rd January 2025
33AQI
24th January 2025
42AQI
25th January 2025
33AQI
26th January 2025
25AQI
27th January 2025
25AQI
28th January 2025
29AQI
29th January 2025
27AQI
30th January 2025
40AQI
31st January 2025
40AQI
1st February 2025
25AQI
2nd February 2025
41AQI
3rd February 2025
42AQI
4th February 2025
25AQI
5th February 2025
29AQI
6th February 2025
33AQI
7th February 2025
26AQI
8th February 2025
32AQI
9th February 2025
31AQI
10th February 2025
37AQI
11th February 2025
35AQI
12th February 2025
35AQI
13th February 2025
43AQI
14th February 2025
43AQI
15th February 2025
46AQI
16th February 2025
29AQI
17th February 2025
29AQI
18th February 2025
27AQI
19th February 2025
29AQI
20th February 2025
31AQI
21st February 2025
48AQI
22nd February 2025
52AQI
23rd February 2025
60AQI
24th February 2025
36AQI
25th February 2025
27AQI
26th February 2025
31AQI
27th February 2025
30AQI
28th February 2025
25AQI
1st March 2025
28AQI
2nd March 2025
33AQI
3rd March 2025
50AQI
4th March 2025
40AQI
5th March 2025
26AQI
6th March 2025
26AQI
7th March 2025
29AQI
8th March 2025
28AQI
9th March 2025
27AQI
10th March 2025
30AQI
11th March 2025
29AQI
12th March 2025
31AQI
13th March 2025
57AQI
14th March 2025
51AQI
15th March 2025
47AQI
16th March 2025
26AQI
17th March 2025
26AQI
18th March 2025
33AQI
19th March 2025
27AQI
20th March 2025
27AQI
21st March 2025
27AQI
22nd March 2025
27AQI
23rd March 2025
27AQI
24th March 2025
25AQI
25th March 2025
29AQI
26th March 2025
34AQI
27th March 2025
37AQI
28th March 2025
46AQI
29th March 2025
39AQI
30th March 2025
25AQI
31st March 2025
24AQI
1st April 2025
35AQI
2nd April 2025
30AQI
3rd April 2025
23AQI
4th April 2025
34AQI
5th April 2025
35AQI
6th April 2025
33AQI
7th April 2025
29AQI
8th April 2025
28AQI
9th April 2025
42AQI
10th April 2025
50AQI
11th April 2025
54AQI
12th April 2025
56AQI
13th April 2025
50AQI
14th April 2025
32AQI
15th April 2025
27AQI
16th April 2025
43AQI
17th April 2025
48AQI
18th April 2025
49AQI
19th April 2025
30AQI
20th April 2025
41AQI
21st April 2025
23AQI
22nd April 2025
36AQI
23rd April 2025
38AQI
24th April 2025
33AQI
25th April 2025
24AQI
26th April 2025
23AQI
27th April 2025
28AQI
28th April 2025
38AQI
29th April 2025
26AQI
30th April 2025
35AQI
1st May 2025
29AQI
2nd May 2025
24AQI
3rd May 2025
19AQI
4th May 2025
33AQI
5th May 2025
27AQI
6th May 2025
35AQI
7th May 2025
40AQI
8th May 2025
24AQI
9th May 2025
36AQI
10th May 2025
42AQI
11th May 2025
33AQI
12th May 2025
42AQI
13th May 2025
42AQI
14th May 2025
39AQI
15th May 2025
43AQI
16th May 2025
32AQI
17th May 2025
20AQI
18th May 2025
20AQI
19th May 2025
22AQI
20th May 2025
21AQI
21st May 2025
18AQI
22nd May 2025
20AQI
23rd May 2025
27AQI
24th May 2025
25AQI
25th May 2025
26AQI
26th May 2025
33AQI
27th May 2025
27AQI
28th May 2025
32AQI
29th May 2025
32AQI
30th May 2025
42AQI
31st May 2025
42AQI
1st June 2025
52AQI
2nd June 2025
54AQI
3rd June 2025
55AQI
4th June 2025
78AQI
5th June 2025
66AQI
6th June 2025
67AQI
7th June 2025
69AQI
8th June 2025
77AQI
9th June 2025
68AQI
10th June 2025
65AQI
11th June 2025
65AQI
12th June 2025
71AQI
13th June 2025
66AQI
14th June 2025
59AQI
15th June 2025
48AQI
16th June 2025
51AQI
17th June 2025
32AQI
18th June 2025
23AQI
19th June 2025
29AQI
20th June 2025
34AQI
21st June 2025
43AQI
22nd June 2025
45AQI
23rd June 2025
53AQI
24th June 2025
25AQI
25th June 2025
29AQI
26th June 2025
29AQI
27th June 2025
19AQI
28th June 2025
30AQI
29th June 2025
32AQI
30th June 2025
24AQI
1st July 2025
39AQI
2nd July 2025
47AQI
3rd July 2025
44AQI
4th July 2025
47AQI
5th July 2025
52AQI
6th July 2025
37AQI
7th July 2025
53AQI
8th July 2025
50AQI
9th July 2025
34AQI
10th July 2025
32AQI
11th July 2025
26AQI
12th July 2025
45AQI
13th July 2025
58AQI
14th July 2025
69AQI
15th July 2025
62AQI
16th July 2025
34AQI
17th July 2025
21AQI
18th July 2025
26AQI
19th July 2025
22AQI
20th July 2025
18AQI
21st July 2025
48AQI
22nd July 2025
49AQI
23rd July 2025
42AQI
24th July 2025
25AQI
25th July 2025
23AQI
26th July 2025
31AQI
27th July 2025
22AQI
28th July 2025
23AQI
29th July 2025
37AQI
30th July 2025
43AQI
31st July 2025
107AQI
1st August 2025
101AQI
2nd August 2025
96AQI
3rd August 2025
87AQI
4th August 2025
78AQI
5th August 2025
60AQI
6th August 2025
61AQI
7th August 2025
54AQI
8th August 2025
47AQI
9th August 2025
46AQI
10th August 2025
35AQI
11th August 2025
35AQI
12th August 2025
36AQI
13th August 2025
53AQI
14th August 2025
54AQI
15th August 2025
51AQI
16th August 2025
36AQI
17th August 2025
26AQI
18th August 2025
16AQI
19th August 2025
19AQI
20th August 2025
22AQI
21st August 2025
19AQI
22nd August 2025
27AQI
23rd August 2025
25AQI
24th August 2025
22AQI
25th August 2025
21AQI
26th August 2025
26AQI
27th August 2025
33AQI
28th August 2025
32AQI
29th August 2025
33AQI
30th August 2025
35AQI
31st August 2025
37AQI
1st September 2025
41AQI
2nd September 2025
41AQI
3rd September 2025
47AQI
4th September 2025
55AQI
5th September 2025
34AQI
6th September 2025
22AQI
7th September 2025
33AQI
8th September 2025
36AQI
9th September 2025
37AQI
10th September 2025
48AQI
11th September 2025
48AQI
12th September 2025
54AQI
13th September 2025
53AQI
14th September 2025
56AQI
15th September 2025
53AQI
16th September 2025
49AQI
17th September 2025
40AQI
18th September 2025
37AQI
19th September 2025
32AQI
20th September 2025
26AQI
21st September 2025
28AQI
22nd September 2025
27AQI
23rd September 2025
25AQI
24th September 2025
24AQI
25th September 2025
29AQI
26th September 2025
35AQI
27th September 2025
33AQI
28th September 2025
33AQI
29th September 2025
37AQI
30th September 2025
47AQI
1st October 2025
54AQI
2nd October 2025
55AQI
3rd October 2025
63AQI
4th October 2025
61AQI
5th October 2025
51AQI
6th October 2025
49AQI
7th October 2025
30AQI
8th October 2025
38AQI
9th October 2025
44AQI
10th October 2025
44AQI
11th October 2025
40AQI
12th October 2025
41AQI
13th October 2025
52AQI
14th October 2025
38AQI
15th October 2025
42AQI
16th October 2025
52AQI
17th October 2025
60AQI
18th October 2025
19th October 2025
20th October 2025
21st October 2025
22nd October 2025
23rd October 2025
24th October 2025
25th October 2025
26th October 2025
27th October 2025
28th October 2025
29th October 2025
30th October 2025
31st October 2025
1st November 2025
2nd November 2025
3rd November 2025
4th November 2025
5th November 2025
6th November 2025
7th November 2025
8th November 2025
9th November 2025
10th November 2025
11th November 2025
12th November 2025
13th November 2025
14th November 2025
15th November 2025
16th November 2025
17th November 2025
18th November 2025
19th November 2025
20th November 2025
21st November 2025
22nd November 2025
23rd November 2025
24th November 2025
25th November 2025
26th November 2025
27th November 2025
28th November 2025
29th November 2025
30th November 2025
1st December 2025
2nd December 2025
3rd December 2025
4th December 2025
5th December 2025
6th December 2025
7th December 2025
8th December 2025
9th December 2025
10th December 2025
11th December 2025
12th December 2025
13th December 2025
14th December 2025
15th December 2025
16th December 2025
17th December 2025
18th December 2025
19th December 2025
20th December 2025
21st December 2025
22nd December 2025
23rd December 2025
24th December 2025
25th December 2025
26th December 2025
27th December 2025
28th December 2025
29th December 2025
30th December 2025
31st December 2025

31AQI

35AQI

33AQI

36AQI

31AQI

49AQI

41AQI

43AQI

39AQI

48AQI


No. of days

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

202538AQI

30
1
26
2
29
2
28
2
31
14
16
25
5
1
21
9
1
25
5
9
8
238
50
2

Highest AQI recorded in

June

49AQI


Lowest AQI recorded in

January

31AQI


202432AQI

25
6
25
4
30
1
30
29
2
29
30
1
28
3
28
2
25
6
30
29
2
338
27

Highest AQI recorded in

October

40AQI


Lowest AQI recorded in

April

23AQI


202341AQI

19
12
26
2
27
1
27
3
24
7
10
15
4
1
22
7
2
20
11
26
4
31
25
3
24
7
281
72
6
1

Highest AQI recorded in

June

69AQI


Lowest AQI recorded in

February

32AQI


202231AQI

29
1
19
3
31
29
27
3
19
1
20
2
3
29
22
8
25
5
30
1
283
24

Highest AQI recorded in

October

42AQI


Lowest AQI recorded in

April

19AQI


202134AQI

21
9
16
12
29
2
28
2
31
30
18
13
26
5
28
2
31
30
30
1
318
46

Highest AQI recorded in

February

48AQI


Lowest AQI recorded in

June

25AQI


202029AQI

13
18
2
18
30
29
2
31
30
29
1
28
2
24
7
250
14

Highest AQI recorded in

April

38AQI


Lowest AQI recorded in

May

22AQI


Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2023(Avg.)
41AQI
Least Polluted Year Recorded
2020(Avg.)
29AQI


Waterloo's annual 2025 AQI (38) shows an average percentage change of 15.02% (worsened AQI) compared to previous years: 2020 (29), 2021 (34), 2022 (31), 2023 (41), 2024 (32).