Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

U.S. 31, Decatur, Alabama, 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+

August Air Quality Analysis

U.S. 31, Decatur, Alabama, United States

2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
2nd Aug 2025
47AQI
Lowest AQI recorded on
6th Aug 2025
24AQI

Same Day Analysis (10th August ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 47 of Good air quality on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 10th Aug - 11th Aug 2025

U.S. 31, Decatur, Alabama, United States

AQI
Day
Night
.

5 AM10th Aug 2025

7 PM

4 AM11th Aug 2025

Day time
Avg. Highest Time
7AM10th Aug

52AQI

Avg. Lowest Time
9AM10th Aug

40AQI

Night time
Avg. Highest Time
8PM10th Aug

49AQI

Avg. Lowest Time
4AM11th Aug

24AQI

In the last 24 hours,

U.S. 31's AQI reached its highest point of 52 at 7 AM during the Day, while the lowest point, 24, was recorded at 4 AM during the Night between 10th Aug and 11th Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

U.S. 31, Decatur, Alabama, United States

JulAug
12th - 13th13th - 14th14th - 15th15th - 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
Day
Night
12th Jul 2025435 AMAQI
12th Jul 2025386 AMAQI
12th Jul 2025387 AMAQI
12th Jul 2025378 AMAQI
12th Jul 2025299 AMAQI
12th Jul 20253710 AMAQI
12th Jul 20253911 AMAQI
12th Jul 20253912 PMAQI
12th Jul 2025481 PMAQI
12th Jul 2025422 PMAQI
12th Jul 2025443 PMAQI
12th Jul 2025464 PMAQI
12th Jul 2025485 PMAQI
12th Jul 2025496 PMAQI
12th Jul 2025467 PMAQI
12th Jul 2025448 PMAQI
12th Jul 2025469 PMAQI
12th Jul 20254810 PMAQI
12th Jul 20254811 PMAQI
13th Jul 20254612 AMAQI
13th Jul 2025481 AMAQI
13th Jul 2025532 AMAQI
13th Jul 2025413 AMAQI
13th Jul 2025484 AMAQI

28°C21/35°C

13th Jul 2025485 AMAQI
13th Jul 2025476 AMAQI
13th Jul 2025497 AMAQI
13th Jul 2025428 AMAQI
13th Jul 2025429 AMAQI
13th Jul 20253910 AMAQI
13th Jul 20253911 AMAQI
13th Jul 20254012 PMAQI
13th Jul 2025471 PMAQI
13th Jul 2025482 PMAQI
13th Jul 2025463 PMAQI
13th Jul 2025444 PMAQI
13th Jul 2025445 PMAQI
13th Jul 2025456 PMAQI
13th Jul 2025457 PMAQI
13th Jul 2025458 PMAQI
13th Jul 2025409 PMAQI
13th Jul 20253710 PMAQI
13th Jul 20254011 PMAQI
14th Jul 20253612 AMAQI
14th Jul 2025341 AMAQI
14th Jul 2025222 AMAQI
14th Jul 2025223 AMAQI
14th Jul 2025234 AMAQI

27°C21/33°C

14th Jul 2025205 AMAQI
14th Jul 2025246 AMAQI
14th Jul 2025207 AMAQI
14th Jul 2025208 AMAQI
14th Jul 2025209 AMAQI
14th Jul 20252510 AMAQI
14th Jul 20253011 AMAQI
14th Jul 20253012 PMAQI
14th Jul 2025321 PMAQI
14th Jul 2025352 PMAQI
14th Jul 2025343 PMAQI
14th Jul 2025344 PMAQI
14th Jul 2025295 PMAQI
14th Jul 2025326 PMAQI
14th Jul 2025287 PMAQI
14th Jul 2025288 PMAQI
14th Jul 2025319 PMAQI
14th Jul 20252910 PMAQI
14th Jul 20252811 PMAQI
15th Jul 20252912 AMAQI
15th Jul 2025301 AMAQI
15th Jul 2025322 AMAQI
15th Jul 2025223 AMAQI
15th Jul 2025304 AMAQI

27°C20/35°C

15th Jul 2025265 AMAQI
15th Jul 2025246 AMAQI
15th Jul 2025277 AMAQI
15th Jul 2025278 AMAQI
15th Jul 2025309 AMAQI
15th Jul 20252910 AMAQI
15th Jul 20254011 AMAQI
15th Jul 20253912 PMAQI
15th Jul 2025401 PMAQI
15th Jul 2025402 PMAQI
15th Jul 2025413 PMAQI
15th Jul 2025384 PMAQI
15th Jul 2025395 PMAQI
15th Jul 2025416 PMAQI
15th Jul 2025337 PMAQI
15th Jul 2025358 PMAQI
15th Jul 2025389 PMAQI
15th Jul 20253810 PMAQI
15th Jul 20253411 PMAQI
16th Jul 20253412 AMAQI
16th Jul 2025381 AMAQI
16th Jul 2025352 AMAQI
16th Jul 2025263 AMAQI
16th Jul 2025404 AMAQI

28°C21/36°C

16th Jul 2025295 AMAQI
16th Jul 2025386 AMAQI
16th Jul 2025387 AMAQI
16th Jul 2025488 AMAQI
16th Jul 2025399 AMAQI
16th Jul 20253410 AMAQI
16th Jul 20254411 AMAQI
16th Jul 20254712 PMAQI
16th Jul 2025491 PMAQI
16th Jul 2025422 PMAQI
16th Jul 2025463 PMAQI
16th Jul 2025464 PMAQI
16th Jul 2025405 PMAQI
16th Jul 2025386 PMAQI
16th Jul 2025407 PMAQI
16th Jul 2025388 PMAQI
16th Jul 2025439 PMAQI
16th Jul 20254310 PMAQI
16th Jul 20254011 PMAQI
17th Jul 20254012 AMAQI
17th Jul 2025391 AMAQI
17th Jul 2025462 AMAQI
17th Jul 2025363 AMAQI
17th Jul 2025384 AMAQI

29°C23/35°C

17th Jul 2025405 AMAQI
17th Jul 2025456 AMAQI
17th Jul 2025397 AMAQI
17th Jul 2025338 AMAQI
17th Jul 2025309 AMAQI
17th Jul 20253210 AMAQI
17th Jul 20253411 AMAQI
17th Jul 20254012 PMAQI
17th Jul 2025461 PMAQI
17th Jul 2025382 PMAQI
17th Jul 2025383 PMAQI
17th Jul 2025384 PMAQI
17th Jul 2025375 PMAQI
17th Jul 2025346 PMAQI
17th Jul 2025367 PMAQI
17th Jul 2025358 PMAQI
17th Jul 2025309 PMAQI
17th Jul 20253210 PMAQI
17th Jul 20253111 PMAQI
18th Jul 20253312 AMAQI
18th Jul 2025321 AMAQI
18th Jul 2025252 AMAQI
18th Jul 2025163 AMAQI
18th Jul 2025204 AMAQI

29°C22/36°C

18th Jul 2025155 AMAQI
18th Jul 2025216 AMAQI
18th Jul 2025247 AMAQI
18th Jul 2025238 AMAQI
18th Jul 2025189 AMAQI
18th Jul 20251910 AMAQI
18th Jul 20251711 AMAQI
18th Jul 20252012 PMAQI
18th Jul 2025261 PMAQI
18th Jul 2025302 PMAQI
18th Jul 2025273 PMAQI
18th Jul 2025294 PMAQI
18th Jul 2025305 PMAQI
18th Jul 2025246 PMAQI
18th Jul 2025247 PMAQI
18th Jul 2025238 PMAQI
18th Jul 2025289 PMAQI
18th Jul 20252710 PMAQI
18th Jul 20252811 PMAQI
19th Jul 20252612 AMAQI
19th Jul 2025261 AMAQI
19th Jul 2025302 AMAQI
19th Jul 2025273 AMAQI
19th Jul 2025314 AMAQI

27°C23/31°C

19th Jul 2025265 AMAQI
19th Jul 2025326 AMAQI
19th Jul 2025247 AMAQI
19th Jul 2025258 AMAQI
19th Jul 2025259 AMAQI
19th Jul 20253010 AMAQI
19th Jul 20252711 AMAQI
19th Jul 20253012 PMAQI
19th Jul 2025321 PMAQI
19th Jul 2025312 PMAQI
19th Jul 2025343 PMAQI
19th Jul 2025354 PMAQI
19th Jul 2025345 PMAQI
19th Jul 2025316 PMAQI
19th Jul 2025357 PMAQI
19th Jul 2025308 PMAQI
19th Jul 2025369 PMAQI
19th Jul 20253710 PMAQI
19th Jul 20253711 PMAQI
20th Jul 20253912 AMAQI
20th Jul 2025381 AMAQI
20th Jul 2025402 AMAQI
20th Jul 2025373 AMAQI
20th Jul 2025444 AMAQI

26°C23/31°C

20th Jul 2025355 AMAQI
20th Jul 2025336 AMAQI
20th Jul 2025337 AMAQI
20th Jul 2025368 AMAQI
20th Jul 2025409 AMAQI
20th Jul 20253010 AMAQI
20th Jul 20253611 AMAQI
20th Jul 20254012 PMAQI
20th Jul 2025441 PMAQI
20th Jul 2025442 PMAQI
20th Jul 2025393 PMAQI
20th Jul 2025474 PMAQI
20th Jul 2025465 PMAQI
20th Jul 2025386 PMAQI
20th Jul 2025397 PMAQI
20th Jul 2025408 PMAQI
20th Jul 2025409 PMAQI
20th Jul 20254010 PMAQI
20th Jul 20254111 PMAQI
21st Jul 20254112 AMAQI
21st Jul 2025401 AMAQI
21st Jul 2025382 AMAQI
21st Jul 2025373 AMAQI
21st Jul 2025234 AMAQI

28°C23/33°C

21st Jul 2025385 AMAQI
21st Jul 2025356 AMAQI
21st Jul 2025367 AMAQI
21st Jul 2025418 AMAQI
21st Jul 2025399 AMAQI
21st Jul 20254210 AMAQI
21st Jul 20253511 AMAQI
21st Jul 20253912 PMAQI
21st Jul 2025441 PMAQI
21st Jul 2025462 PMAQI
21st Jul 2025473 PMAQI
21st Jul 2025454 PMAQI
21st Jul 2025445 PMAQI
21st Jul 2025406 PMAQI
21st Jul 2025427 PMAQI
21st Jul 2025408 PMAQI
21st Jul 2025469 PMAQI
21st Jul 20254610 PMAQI
21st Jul 20254411 PMAQI
22nd Jul 20254712 AMAQI
22nd Jul 2025461 AMAQI
22nd Jul 2025462 AMAQI
22nd Jul 2025383 AMAQI
22nd Jul 2025424 AMAQI

29°C23/35°C

22nd Jul 2025345 AMAQI
22nd Jul 2025406 AMAQI
22nd Jul 2025387 AMAQI
22nd Jul 2025458 AMAQI
22nd Jul 2025379 AMAQI
22nd Jul 20254310 AMAQI
22nd Jul 20255711 AMAQI
22nd Jul 20255712 PMAQI
22nd Jul 2025551 PMAQI
22nd Jul 2025532 PMAQI
22nd Jul 2025503 PMAQI
22nd Jul 2025514 PMAQI
22nd Jul 2025505 PMAQI
22nd Jul 2025466 PMAQI
22nd Jul 2025477 PMAQI
22nd Jul 2025468 PMAQI
22nd Jul 2025489 PMAQI
22nd Jul 20254610 PMAQI
22nd Jul 20254511 PMAQI
23rd Jul 20254112 AMAQI
23rd Jul 2025411 AMAQI
23rd Jul 2025282 AMAQI
23rd Jul 2025293 AMAQI
23rd Jul 2025344 AMAQI

29°C24/36°C

23rd Jul 2025345 AMAQI
23rd Jul 2025376 AMAQI
23rd Jul 2025357 AMAQI
23rd Jul 2025348 AMAQI
23rd Jul 2025369 AMAQI
23rd Jul 20253410 AMAQI
23rd Jul 20254611 AMAQI
23rd Jul 20254212 PMAQI
23rd Jul 2025481 PMAQI
23rd Jul 2025452 PMAQI
23rd Jul 2025443 PMAQI
23rd Jul 2025434 PMAQI
23rd Jul 2025425 PMAQI
23rd Jul 2025396 PMAQI
23rd Jul 2025427 PMAQI
23rd Jul 2025428 PMAQI
23rd Jul 2025439 PMAQI
23rd Jul 20254610 PMAQI
23rd Jul 20254111 PMAQI
24th Jul 20254112 AMAQI
24th Jul 2025401 AMAQI
24th Jul 2025432 AMAQI
24th Jul 2025403 AMAQI
24th Jul 2025494 AMAQI

29°C23/36°C

24th Jul 2025485 AMAQI
24th Jul 2025496 AMAQI
24th Jul 2025517 AMAQI
24th Jul 2025448 AMAQI
24th Jul 2025409 AMAQI
24th Jul 20255110 AMAQI
24th Jul 20255111 AMAQI
24th Jul 20255212 PMAQI
24th Jul 2025481 PMAQI
24th Jul 2025502 PMAQI
24th Jul 2025503 PMAQI
24th Jul 2025484 PMAQI
24th Jul 2025475 PMAQI
24th Jul 2025476 PMAQI
24th Jul 2025487 PMAQI
24th Jul 2025498 PMAQI
24th Jul 2025509 PMAQI
24th Jul 20255110 PMAQI
24th Jul 20254911 PMAQI
25th Jul 20254912 AMAQI
25th Jul 2025491 AMAQI
25th Jul 2025422 AMAQI
25th Jul 2025363 AMAQI
25th Jul 2025384 AMAQI

29°C23/36°C

25th Jul 2025375 AMAQI
25th Jul 2025346 AMAQI
25th Jul 2025387 AMAQI
25th Jul 2025418 AMAQI
25th Jul 2025389 AMAQI
25th Jul 20253810 AMAQI
25th Jul 20253211 AMAQI
25th Jul 20253212 PMAQI
25th Jul 2025281 PMAQI
25th Jul 2025342 PMAQI
25th Jul 2025383 PMAQI
25th Jul 2025364 PMAQI
25th Jul 2025335 PMAQI
25th Jul 2025326 PMAQI
25th Jul 2025387 PMAQI
25th Jul 2025388 PMAQI
25th Jul 2025349 PMAQI
25th Jul 20253010 PMAQI
25th Jul 20253111 PMAQI
26th Jul 20253312 AMAQI
26th Jul 2025301 AMAQI
26th Jul 2025172 AMAQI
26th Jul 2025173 AMAQI
26th Jul 2025274 AMAQI

27°C24/33°C

26th Jul 2025325 AMAQI
26th Jul 2025286 AMAQI
26th Jul 2025327 AMAQI
26th Jul 2025298 AMAQI
26th Jul 2025289 AMAQI
26th Jul 20252010 AMAQI
26th Jul 20251811 AMAQI
26th Jul 20252012 PMAQI
26th Jul 2025241 PMAQI
26th Jul 2025272 PMAQI
26th Jul 2025263 PMAQI
26th Jul 2025274 PMAQI
26th Jul 2025315 PMAQI
26th Jul 2025306 PMAQI
26th Jul 2025247 PMAQI
26th Jul 2025278 PMAQI
26th Jul 2025279 PMAQI
26th Jul 20252510 PMAQI
26th Jul 20252911 PMAQI
27th Jul 20252712 AMAQI
27th Jul 2025241 AMAQI
27th Jul 2025172 AMAQI
27th Jul 2025163 AMAQI
27th Jul 2025164 AMAQI

27°C22/33°C

27th Jul 2025165 AMAQI
27th Jul 2025156 AMAQI
27th Jul 2025197 AMAQI
27th Jul 2025218 AMAQI
27th Jul 2025189 AMAQI
27th Jul 20252010 AMAQI
27th Jul 20252211 AMAQI
27th Jul 20252412 PMAQI
27th Jul 2025261 PMAQI
27th Jul 2025292 PMAQI
27th Jul 2025243 PMAQI
27th Jul 2025234 PMAQI
27th Jul 2025255 PMAQI
27th Jul 2025216 PMAQI
27th Jul 2025217 PMAQI
27th Jul 2025248 PMAQI
27th Jul 2025279 PMAQI
27th Jul 20252910 PMAQI
27th Jul 20252711 PMAQI
28th Jul 20252512 AMAQI
28th Jul 2025261 AMAQI
28th Jul 2025312 AMAQI
28th Jul 2025263 AMAQI
28th Jul 2025324 AMAQI

28°C22/35°C

28th Jul 2025325 AMAQI
28th Jul 2025256 AMAQI
28th Jul 2025277 AMAQI
28th Jul 2025248 AMAQI
28th Jul 2025239 AMAQI
28th Jul 20252910 AMAQI
28th Jul 20253011 AMAQI
28th Jul 20253412 PMAQI
28th Jul 2025391 PMAQI
28th Jul 2025392 PMAQI
28th Jul 2025383 PMAQI
28th Jul 2025394 PMAQI
28th Jul 2025395 PMAQI
28th Jul 2025386 PMAQI
28th Jul 2025327 PMAQI
28th Jul 2025348 PMAQI
28th Jul 2025409 PMAQI
28th Jul 20254210 PMAQI
28th Jul 20253811 PMAQI
29th Jul 20253312 AMAQI
29th Jul 2025331 AMAQI
29th Jul 2025302 AMAQI
29th Jul 2025243 AMAQI
29th Jul 2025364 AMAQI

29°C24/37°C

29th Jul 2025305 AMAQI
29th Jul 2025316 AMAQI
29th Jul 2025317 AMAQI
29th Jul 2025318 AMAQI
29th Jul 2025289 AMAQI
29th Jul 20253310 AMAQI
29th Jul 20253211 AMAQI
29th Jul 20253812 PMAQI
29th Jul 2025371 PMAQI
29th Jul 2025422 PMAQI
29th Jul 2025423 PMAQI
29th Jul 2025424 PMAQI
29th Jul 2025415 PMAQI
29th Jul 2025406 PMAQI
29th Jul 2025367 PMAQI
29th Jul 2025368 PMAQI
29th Jul 2025429 PMAQI
29th Jul 20254310 PMAQI
29th Jul 20254211 PMAQI
30th Jul 20254212 AMAQI
30th Jul 2025431 AMAQI
30th Jul 2025462 AMAQI
30th Jul 2025393 AMAQI
30th Jul 2025444 AMAQI

29°C22/38°C

30th Jul 2025445 AMAQI
30th Jul 2025446 AMAQI
30th Jul 2025467 AMAQI
30th Jul 2025488 AMAQI
30th Jul 2025489 AMAQI
30th Jul 20255010 AMAQI
30th Jul 20255311 AMAQI
30th Jul 20255312 PMAQI
30th Jul 2025481 PMAQI
30th Jul 2025532 PMAQI
30th Jul 2025533 PMAQI
30th Jul 2025534 PMAQI
30th Jul 2025535 PMAQI
30th Jul 2025536 PMAQI
30th Jul 2025537 PMAQI
30th Jul 2025538 PMAQI
30th Jul 2025479 PMAQI
30th Jul 20254810 PMAQI
30th Jul 20254811 PMAQI
31st Jul 20254312 AMAQI
31st Jul 2025401 AMAQI
31st Jul 2025372 AMAQI
31st Jul 2025343 AMAQI
31st Jul 2025364 AMAQI

28°C23/35°C

31st Jul 2025305 AMAQI
31st Jul 2025346 AMAQI
31st Jul 2025407 AMAQI
31st Jul 2025408 AMAQI
31st Jul 2025489 AMAQI
31st Jul 20255010 AMAQI
31st Jul 20254911 AMAQI
31st Jul 20255412 PMAQI
31st Jul 2025541 PMAQI
31st Jul 2025552 PMAQI
31st Jul 2025563 PMAQI
31st Jul 2025564 PMAQI
31st Jul 2025565 PMAQI
31st Jul 2025556 PMAQI
31st Jul 2025507 PMAQI
31st Jul 2025488 PMAQI
31st Jul 2025469 PMAQI
31st Jul 20254610 PMAQI
31st Jul 20254411 PMAQI
1st Aug 20254412 AMAQI
1st Aug 2025441 AMAQI
1st Aug 2025442 AMAQI
1st Aug 2025373 AMAQI
1st Aug 2025344 AMAQI

29°C23/37°C

1st Aug 2025335 AMAQI
1st Aug 2025346 AMAQI
1st Aug 2025327 AMAQI
1st Aug 2025398 AMAQI
1st Aug 2025419 AMAQI
1st Aug 20254410 AMAQI
1st Aug 20254711 AMAQI
1st Aug 20255212 PMAQI
1st Aug 2025521 PMAQI
1st Aug 2025532 PMAQI
1st Aug 2025513 PMAQI
1st Aug 2025524 PMAQI
1st Aug 2025525 PMAQI
1st Aug 2025496 PMAQI
1st Aug 2025467 PMAQI
1st Aug 2025418 PMAQI
1st Aug 2025429 PMAQI
1st Aug 20254010 PMAQI
1st Aug 20253611 PMAQI
2nd Aug 20253712 AMAQI
2nd Aug 2025391 AMAQI
2nd Aug 2025402 AMAQI
2nd Aug 2025423 AMAQI
2nd Aug 2025484 AMAQI

26°C22/30°C

2nd Aug 2025485 AMAQI
2nd Aug 2025526 AMAQI
2nd Aug 2025527 AMAQI
2nd Aug 2025538 AMAQI
2nd Aug 2025529 AMAQI
2nd Aug 20255310 AMAQI
2nd Aug 20255011 AMAQI
2nd Aug 20254812 PMAQI
2nd Aug 2025481 PMAQI
2nd Aug 2025502 PMAQI
2nd Aug 2025523 PMAQI
2nd Aug 2025524 PMAQI
2nd Aug 2025535 PMAQI
2nd Aug 2025476 PMAQI
2nd Aug 2025497 PMAQI
2nd Aug 2025488 PMAQI
2nd Aug 2025479 PMAQI
2nd Aug 20254510 PMAQI
2nd Aug 20254411 PMAQI
3rd Aug 20254012 AMAQI
3rd Aug 2025431 AMAQI
3rd Aug 2025442 AMAQI
3rd Aug 2025423 AMAQI
3rd Aug 2025384 AMAQI

24°C21/29°C

3rd Aug 2025365 AMAQI
3rd Aug 2025316 AMAQI
3rd Aug 2025287 AMAQI
3rd Aug 2025328 AMAQI
3rd Aug 2025349 AMAQI
3rd Aug 20253010 AMAQI
3rd Aug 20253111 AMAQI
3rd Aug 20252812 PMAQI
3rd Aug 2025251 PMAQI
3rd Aug 2025212 PMAQI
3rd Aug 2025193 PMAQI
3rd Aug 2025204 PMAQI
3rd Aug 2025245 PMAQI
3rd Aug 2025256 PMAQI
3rd Aug 2025367 PMAQI
3rd Aug 2025318 PMAQI
3rd Aug 2025289 PMAQI
3rd Aug 20253210 PMAQI
3rd Aug 20253211 PMAQI
4th Aug 20253412 AMAQI
4th Aug 2025341 AMAQI
4th Aug 2025332 AMAQI
4th Aug 2025353 AMAQI
4th Aug 2025334 AMAQI

23°C21/28°C

4th Aug 2025345 AMAQI
4th Aug 2025346 AMAQI
4th Aug 2025357 AMAQI
4th Aug 2025368 AMAQI
4th Aug 2025339 AMAQI
4th Aug 20252910 AMAQI
4th Aug 20252711 AMAQI
4th Aug 20252812 PMAQI
4th Aug 2025321 PMAQI
4th Aug 2025292 PMAQI
4th Aug 2025253 PMAQI
4th Aug 2025294 PMAQI
4th Aug 2025325 PMAQI
4th Aug 2025366 PMAQI
4th Aug 2025337 PMAQI
4th Aug 2025328 PMAQI
4th Aug 2025339 PMAQI
4th Aug 20253010 PMAQI
4th Aug 20253111 PMAQI
5th Aug 20253412 AMAQI
5th Aug 2025261 AMAQI
5th Aug 2025292 AMAQI
5th Aug 2025303 AMAQI
5th Aug 2025324 AMAQI

23°C20/28°C

5th Aug 2025285 AMAQI
5th Aug 2025226 AMAQI
5th Aug 2025217 AMAQI
5th Aug 2025238 AMAQI
5th Aug 2025259 AMAQI
5th Aug 20252410 AMAQI
5th Aug 20252311 AMAQI
5th Aug 20252612 PMAQI
5th Aug 2025211 PMAQI
5th Aug 2025202 PMAQI
5th Aug 2025223 PMAQI
5th Aug 2025224 PMAQI
5th Aug 2025245 PMAQI
5th Aug 2025266 PMAQI
5th Aug 2025247 PMAQI
5th Aug 2025248 PMAQI
5th Aug 2025289 PMAQI
5th Aug 20252710 PMAQI
5th Aug 20252411 PMAQI
6th Aug 20252412 AMAQI
6th Aug 2025201 AMAQI
6th Aug 2025212 AMAQI
6th Aug 2025223 AMAQI
6th Aug 2025244 AMAQI

23°C18/29°C

6th Aug 2025265 AMAQI
6th Aug 2025276 AMAQI
6th Aug 2025247 AMAQI
6th Aug 2025268 AMAQI
6th Aug 2025279 AMAQI
6th Aug 20252410 AMAQI
6th Aug 20252411 AMAQI
6th Aug 20252312 PMAQI
6th Aug 2025241 PMAQI
6th Aug 2025212 PMAQI
6th Aug 2025203 PMAQI
6th Aug 2025204 PMAQI
6th Aug 2025235 PMAQI
6th Aug 2025206 PMAQI
6th Aug 2025237 PMAQI
6th Aug 2025278 PMAQI
6th Aug 2025369 PMAQI
6th Aug 20252410 PMAQI
6th Aug 20252611 PMAQI
7th Aug 20252712 AMAQI
7th Aug 2025261 AMAQI
7th Aug 2025242 AMAQI
7th Aug 2025233 AMAQI
7th Aug 2025284 AMAQI

26°C21/31°C

7th Aug 2025185 AMAQI
7th Aug 2025206 AMAQI
7th Aug 2025217 AMAQI
7th Aug 2025228 AMAQI
7th Aug 2025269 AMAQI
7th Aug 20253010 AMAQI
7th Aug 20252911 AMAQI
7th Aug 20253412 PMAQI
7th Aug 2025361 PMAQI
7th Aug 2025362 PMAQI
7th Aug 2025353 PMAQI
7th Aug 2025364 PMAQI
7th Aug 2025355 PMAQI
7th Aug 2025356 PMAQI
7th Aug 2025307 PMAQI
7th Aug 2025308 PMAQI
7th Aug 2025349 PMAQI
7th Aug 20253410 PMAQI
7th Aug 20253511 PMAQI
8th Aug 20253412 AMAQI
8th Aug 2025301 AMAQI
8th Aug 2025222 AMAQI
8th Aug 2025213 AMAQI
8th Aug 2025324 AMAQI

26°C20/33°C

8th Aug 2025375 AMAQI
8th Aug 2025386 AMAQI
8th Aug 2025407 AMAQI
8th Aug 2025368 AMAQI
8th Aug 2025349 AMAQI
8th Aug 20253110 AMAQI
8th Aug 20252711 AMAQI
8th Aug 20253012 PMAQI
8th Aug 2025281 PMAQI
8th Aug 2025312 PMAQI
8th Aug 2025373 PMAQI
8th Aug 2025354 PMAQI
8th Aug 2025325 PMAQI
8th Aug 2025326 PMAQI
8th Aug 2025347 PMAQI
8th Aug 2025368 PMAQI
8th Aug 2025399 PMAQI
8th Aug 20254010 PMAQI
8th Aug 20253611 PMAQI
9th Aug 20253912 AMAQI
9th Aug 2025391 AMAQI
9th Aug 2025422 AMAQI
9th Aug 2025383 AMAQI
9th Aug 2025424 AMAQI

25°C20/32°C

9th Aug 2025405 AMAQI
9th Aug 2025356 AMAQI
9th Aug 2025387 AMAQI
9th Aug 2025388 AMAQI
9th Aug 2025369 AMAQI
9th Aug 20254610 AMAQI
9th Aug 20254411 AMAQI
9th Aug 20255012 PMAQI
9th Aug 2025501 PMAQI
9th Aug 2025512 PMAQI
9th Aug 2025503 PMAQI
9th Aug 2025474 PMAQI
9th Aug 2025445 PMAQI
9th Aug 2025456 PMAQI
9th Aug 2025417 PMAQI
9th Aug 2025448 PMAQI
9th Aug 2025469 PMAQI
9th Aug 20254810 PMAQI
9th Aug 20254611 PMAQI
10th Aug 20254812 AMAQI
10th Aug 2025481 AMAQI
10th Aug 2025522 AMAQI
10th Aug 2025523 AMAQI
10th Aug 2025534 AMAQI

27°C22/34°C

10th Aug 2025455 AMAQI
10th Aug 2025466 AMAQI
10th Aug 2025527 AMAQI
10th Aug 2025528 AMAQI
10th Aug 2025409 AMAQI
10th Aug 20254410 AMAQI
10th Aug 20254911 AMAQI
10th Aug 20254912 PMAQI
10th Aug 2025451 PMAQI
10th Aug 2025492 PMAQI
10th Aug 2025473 PMAQI
10th Aug 2025454 PMAQI
10th Aug 2025445 PMAQI
10th Aug 2025466 PMAQI
10th Aug 2025497 PMAQI
10th Aug 2025498 PMAQI
10th Aug 2025409 PMAQI
10th Aug 20253610 PMAQI
10th Aug 20253511 PMAQI
11th Aug 20253812 AMAQI
11th Aug 2025301 AMAQI
11th Aug 2025262 AMAQI
11th Aug 2025243 AMAQI
11th Aug 2025244 AMAQI

27°C20/33°C

11th Aug 2025245 AMAQI
5 AM
11th Aug 2025296 AMAQI
11th Aug 2025297 AMAQI
11th Aug 2025298 AMAQI
11th Aug 2025299 AMAQI
11th Aug 20252810 AMAQI
11th Aug 20252811 AMAQI
11th Aug 20253012 PMAQI
12 PM
11th Aug 2025271 PMAQI
11th Aug 2025242 PMAQI
11th Aug 2025243 PMAQI
7 PM
12 AM
4 AM

--°C/°C

Day time
Avg. Highest Time
12 PM - 7 PM

39AQI

8 hours / Day
240 hours / Month
Avg. Lowest Time
5 AM - 10 AM

34AQI

6 hours / Day
180 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 PM to 7 PM (Avg. 39), while the lowest AQI was between 5 AM to 10 AM (Avg. 34).
Night time
Avg. Highest Time
9 PM - 11 PM

38AQI

3 hours / Day
90 hours / Month
Avg. Lowest Time
3 AM

31AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 PM to 11 PM (Avg. 38), while the lowest AQI was between 3 AM to 3 AM (Avg. 31).

2025 Days Vs Air Quality

U.S. 31, Decatur, Alabama, United States

2025

88%

120

12%

17

Total number of days with different AQI categories in last 223 days in 2025 (142 days remaining)

Good
120 Days
Moderate
17 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 88%

Health Risk Level:

Low

In 2025, 88% of 223 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

U.S. 31, Decatur, Alabama, 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.

1st March 2025
44AQI
2nd March 2025
64AQI
3rd March 2025
60AQI
4th March 2025
51AQI
5th March 2025
25AQI
1st April 2025
23AQI
2nd April 2025
35AQI
3rd April 2025
37AQI
4th April 2025
39AQI
5th April 2025
34AQI
6th April 2025
19AQI
7th April 2025
16AQI
8th April 2025
23AQI
9th April 2025
24AQI
10th April 2025
38AQI
11th April 2025
29AQI
12th April 2025
30AQI
13th April 2025
30AQI
14th April 2025
45AQI
15th April 2025
33AQI
16th April 2025
28AQI
17th April 2025
50AQI
18th April 2025
54AQI
19th April 2025
53AQI
20th April 2025
50AQI
21st April 2025
47AQI
22nd April 2025
25AQI
23rd April 2025
32AQI
24th April 2025
35AQI
25th April 2025
42AQI
26th April 2025
27AQI
27th April 2025
32AQI
28th April 2025
40AQI
29th April 2025
50AQI
30th April 2025
51AQI
1st May 2025
39AQI
2nd May 2025
31AQI
3rd May 2025
22AQI
4th May 2025
19AQI
5th May 2025
22AQI
6th May 2025
31AQI
7th May 2025
38AQI
8th May 2025
39AQI
9th May 2025
29AQI
10th May 2025
28AQI
11th May 2025
20AQI
12th May 2025
21AQI
13th May 2025
25AQI
14th May 2025
37AQI
15th May 2025
43AQI
16th May 2025
47AQI
17th May 2025
39AQI
18th May 2025
36AQI
19th May 2025
37AQI
20th May 2025
42AQI
21st May 2025
26AQI
22nd May 2025
24AQI
23rd May 2025
24AQI
24th May 2025
30AQI
25th May 2025
29AQI
26th May 2025
24AQI
27th May 2025
19AQI
28th May 2025
24AQI
29th May 2025
25AQI
30th May 2025
25AQI
31st May 2025
38AQI
1st June 2025
50AQI
2nd June 2025
50AQI
3rd June 2025
61AQI
4th June 2025
64AQI
5th June 2025
45AQI
6th June 2025
48AQI
7th June 2025
48AQI
8th June 2025
31AQI
9th June 2025
38AQI
10th June 2025
34AQI
11th June 2025
56AQI
12th June 2025
55AQI
13th June 2025
39AQI
14th June 2025
31AQI
15th June 2025
30AQI
16th June 2025
32AQI
17th June 2025
26AQI
18th June 2025
32AQI
19th June 2025
25AQI
20th June 2025
31AQI
21st June 2025
41AQI
22nd June 2025
44AQI
23rd June 2025
44AQI
24th June 2025
54AQI
25th June 2025
59AQI
26th June 2025
49AQI
27th June 2025
44AQI
28th June 2025
36AQI
29th June 2025
35AQI
30th June 2025
34AQI
1st July 2025
29AQI
2nd July 2025
34AQI
3rd July 2025
45AQI
4th July 2025
54AQI
5th July 2025
68AQI
6th July 2025
58AQI
7th July 2025
55AQI
8th July 2025
51AQI
9th July 2025
39AQI
10th July 2025
31AQI
11th July 2025
35AQI
12th July 2025
42AQI
13th July 2025
44AQI
14th July 2025
28AQI
15th July 2025
33AQI
16th July 2025
39AQI
17th July 2025
37AQI
18th July 2025
24AQI
19th July 2025
31AQI
20th July 2025
39AQI
21st July 2025
40AQI
22nd July 2025
46AQI
23rd July 2025
39AQI
24th July 2025
47AQI
25th July 2025
36AQI
26th July 2025
26AQI
27th July 2025
22AQI
28th July 2025
33AQI
29th July 2025
36AQI
30th July 2025
48AQI
31st July 2025
45AQI
1st August 2025
43AQI
2nd August 2025
47AQI
3rd August 2025
32AQI
4th August 2025
32AQI
5th August 2025
26AQI
6th August 2025
24AQI
7th August 2025
29AQI
8th August 2025
33AQI
9th August 2025
43AQI
10th August 2025
47AQI

49AQI

36AQI

30AQI

42AQI

40AQI

36AQI

No. of days

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

202537AQI

2
3
27
3
31
24
6
26
5
10
120
17

Highest AQI recorded in

March

49AQI

Lowest AQI recorded in

May

30AQI

Most & Least Polluted Years Over the Last 1 Years

Most Polluted Year Recorded
2025(Avg.)
37AQI
Least Polluted Year Recorded
2025(Avg.)
37AQI

U.S. 31's annual 2025 AQI (37) shows an average percentage change of NaN% (improved AQI) compared to previous years: .