Country Background

Research Triangle Park, Durham, North Carolina, 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

Research Triangle Park, Durham, North Carolina, United States

2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
8th Aug 2025
82AQI
Lowest AQI recorded on
12th Aug 2025
21AQI


Same Day Analysis (28th August ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 35 of Good air quality on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 28th Aug - 29th Aug 2025

Research Triangle Park, Durham, North Carolina, United States

AQI
Day
Night
.

6 AM28th Aug 2025

8 PM

5 AM29th Aug 2025

Day time
Avg. Highest Time
9AM28th Aug

48AQI

Avg. Lowest Time
6AM28th Aug

33AQI

Night time
Avg. Highest Time
4AM29th Aug

51AQI

Avg. Lowest Time
10PM28th Aug

34AQI

In the last 24 hours,

Research Triangle Park's AQI reached its highest point of 51 at 4 AM during the Night, while the lowest point, 33, was recorded at 6 AM during the Day between 28th Aug and 29th Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Research Triangle Park, Durham, North Carolina, United States

JulAug
30th - 31st31st - 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 Jul 2025326 AMAQI
30th Jul 2025337 AMAQI
30th Jul 2025338 AMAQI
30th Jul 2025349 AMAQI
30th Jul 20253410 AMAQI
30th Jul 20253411 AMAQI
30th Jul 20253212 PMAQI
30th Jul 2025321 PMAQI
30th Jul 2025362 PMAQI
30th Jul 2025373 PMAQI
30th Jul 2025374 PMAQI
30th Jul 2025375 PMAQI
30th Jul 2025376 PMAQI
30th Jul 2025377 PMAQI
30th Jul 2025378 PMAQI
30th Jul 2025359 PMAQI
30th Jul 20253810 PMAQI
30th Jul 20253611 PMAQI
31st Jul 20253612 AMAQI
31st Jul 2025351 AMAQI
31st Jul 2025342 AMAQI
31st Jul 2025343 AMAQI
31st Jul 2025364 AMAQI
31st Jul 2025355 AMAQI

29°C23/36°C

31st Jul 2025466 AMAQI
31st Jul 2025527 AMAQI
31st Jul 2025548 AMAQI
31st Jul 2025549 AMAQI
31st Jul 20255410 AMAQI
31st Jul 20255111 AMAQI
31st Jul 20255212 PMAQI
31st Jul 2025501 PMAQI
31st Jul 2025512 PMAQI
31st Jul 2025463 PMAQI
31st Jul 2025444 PMAQI
31st Jul 2025435 PMAQI
31st Jul 2025466 PMAQI
31st Jul 2025427 PMAQI
31st Jul 2025378 PMAQI
31st Jul 2025309 PMAQI
31st Jul 20252710 PMAQI
31st Jul 20252611 PMAQI
1st Aug 20252812 AMAQI
1st Aug 2025281 AMAQI
1st Aug 2025282 AMAQI
1st Aug 2025293 AMAQI
1st Aug 2025314 AMAQI
1st Aug 2025285 AMAQI

27°C26/29°C

1st Aug 2025286 AMAQI
1st Aug 2025287 AMAQI
1st Aug 2025328 AMAQI
1st Aug 2025329 AMAQI
1st Aug 20253610 AMAQI
1st Aug 20254011 AMAQI
1st Aug 20254112 PMAQI
1st Aug 2025381 PMAQI
1st Aug 2025382 PMAQI
1st Aug 2025383 PMAQI
1st Aug 2025394 PMAQI
1st Aug 2025415 PMAQI
1st Aug 2025396 PMAQI
1st Aug 2025317 PMAQI
1st Aug 2025358 PMAQI
1st Aug 2025439 PMAQI
1st Aug 20254010 PMAQI
1st Aug 20253311 PMAQI
2nd Aug 20252812 AMAQI
2nd Aug 2025211 AMAQI
2nd Aug 2025202 AMAQI
2nd Aug 2025223 AMAQI
2nd Aug 2025184 AMAQI
2nd Aug 2025165 AMAQI

25°C21/28°C

2nd Aug 2025176 AMAQI
2nd Aug 2025187 AMAQI
2nd Aug 2025188 AMAQI
2nd Aug 2025189 AMAQI
2nd Aug 20251810 AMAQI
2nd Aug 20252211 AMAQI
2nd Aug 20253012 PMAQI
2nd Aug 2025321 PMAQI
2nd Aug 2025372 PMAQI
2nd Aug 2025393 PMAQI
2nd Aug 2025414 PMAQI
2nd Aug 2025425 PMAQI
2nd Aug 2025426 PMAQI
2nd Aug 2025337 PMAQI
2nd Aug 2025368 PMAQI
2nd Aug 2025409 PMAQI
2nd Aug 20254310 PMAQI
2nd Aug 20254111 PMAQI
3rd Aug 20254112 AMAQI
3rd Aug 2025391 AMAQI
3rd Aug 2025362 AMAQI
3rd Aug 2025373 AMAQI
3rd Aug 2025364 AMAQI
3rd Aug 2025385 AMAQI

22°C20/25°C

3rd Aug 2025366 AMAQI
3rd Aug 2025357 AMAQI
3rd Aug 2025328 AMAQI
3rd Aug 2025329 AMAQI
3rd Aug 20253210 AMAQI
3rd Aug 20253111 AMAQI
3rd Aug 20253212 PMAQI
3rd Aug 2025341 PMAQI
3rd Aug 2025352 PMAQI
3rd Aug 2025363 PMAQI
3rd Aug 2025364 PMAQI
3rd Aug 2025365 PMAQI
3rd Aug 2025366 PMAQI
3rd Aug 2025357 PMAQI
3rd Aug 2025348 PMAQI
3rd Aug 2025369 PMAQI
3rd Aug 20253610 PMAQI
3rd Aug 20253611 PMAQI
4th Aug 20253512 AMAQI
4th Aug 2025361 AMAQI
4th Aug 2025352 AMAQI
4th Aug 2025363 AMAQI
4th Aug 2025364 AMAQI
4th Aug 2025385 AMAQI

22°C17/30°C

4th Aug 2025386 AMAQI
4th Aug 2025387 AMAQI
4th Aug 2025388 AMAQI
4th Aug 2025409 AMAQI
4th Aug 20254010 AMAQI
4th Aug 20254211 AMAQI
4th Aug 20254012 PMAQI
4th Aug 2025381 PMAQI
4th Aug 2025402 PMAQI
4th Aug 2025383 PMAQI
4th Aug 2025404 PMAQI
4th Aug 2025445 PMAQI
4th Aug 2025416 PMAQI
4th Aug 2025407 PMAQI
4th Aug 2025408 PMAQI
4th Aug 2025439 PMAQI
4th Aug 20254410 PMAQI
4th Aug 20254211 PMAQI
5th Aug 20254412 AMAQI
5th Aug 2025441 AMAQI
5th Aug 2025442 AMAQI
5th Aug 2025423 AMAQI
5th Aug 2025424 AMAQI
5th Aug 2025405 AMAQI

24°C17/30°C

5th Aug 2025436 AMAQI
5th Aug 2025427 AMAQI
5th Aug 2025408 AMAQI
5th Aug 2025419 AMAQI
5th Aug 20254110 AMAQI
5th Aug 20253911 AMAQI
5th Aug 20253812 PMAQI
5th Aug 2025401 PMAQI
5th Aug 2025382 PMAQI
5th Aug 2025383 PMAQI
5th Aug 2025374 PMAQI
5th Aug 2025345 PMAQI
5th Aug 2025336 PMAQI
5th Aug 2025387 PMAQI
5th Aug 2025398 PMAQI
5th Aug 2025349 PMAQI
5th Aug 20253310 PMAQI
5th Aug 20253411 PMAQI
6th Aug 20253712 AMAQI
6th Aug 2025421 AMAQI
6th Aug 2025482 AMAQI
6th Aug 2025513 AMAQI
6th Aug 2025504 AMAQI
6th Aug 2025445 AMAQI

20°C17/21°C

6th Aug 2025326 AMAQI
6th Aug 2025267 AMAQI
6th Aug 2025228 AMAQI
6th Aug 2025249 AMAQI
6th Aug 20252610 AMAQI
6th Aug 20252511 AMAQI
6th Aug 20252212 PMAQI
6th Aug 2025211 PMAQI
6th Aug 2025182 PMAQI
6th Aug 2025203 PMAQI
6th Aug 2025174 PMAQI
6th Aug 2025165 PMAQI
6th Aug 2025166 PMAQI
6th Aug 2025247 PMAQI
6th Aug 2025268 PMAQI
6th Aug 2025279 PMAQI
6th Aug 20252810 PMAQI
6th Aug 20253411 PMAQI
7th Aug 20253212 AMAQI
7th Aug 2025341 AMAQI
7th Aug 2025382 AMAQI
7th Aug 2025363 AMAQI
7th Aug 2025324 AMAQI
7th Aug 2025325 AMAQI

20°C19/21°C

7th Aug 2025306 AMAQI
7th Aug 2025347 AMAQI
7th Aug 2025358 AMAQI
7th Aug 2025359 AMAQI
7th Aug 20254010 AMAQI
7th Aug 20254611 AMAQI
7th Aug 20255012 PMAQI
7th Aug 2025521 PMAQI
7th Aug 2025522 PMAQI
7th Aug 2025483 PMAQI
7th Aug 2025534 PMAQI
7th Aug 2025565 PMAQI
7th Aug 2025606 PMAQI
7th Aug 2025467 PMAQI
7th Aug 2025468 PMAQI
7th Aug 2025619 PMAQI
7th Aug 20256210 PMAQI
7th Aug 20256211 PMAQI
8th Aug 20257112 AMAQI
8th Aug 2025901 AMAQI
8th Aug 2025922 AMAQI
8th Aug 2025983 AMAQI
8th Aug 2025934 AMAQI
8th Aug 2025985 AMAQI

21°C19/24°C

8th Aug 2025946 AMAQI
8th Aug 2025897 AMAQI
8th Aug 2025888 AMAQI
8th Aug 2025849 AMAQI
8th Aug 20257810 AMAQI
8th Aug 20257411 AMAQI
8th Aug 20257412 PMAQI
8th Aug 2025741 PMAQI
8th Aug 2025762 PMAQI
8th Aug 2025763 PMAQI
8th Aug 2025754 PMAQI
8th Aug 2025735 PMAQI
8th Aug 2025726 PMAQI
8th Aug 2025807 PMAQI
8th Aug 2025828 PMAQI
8th Aug 2025739 PMAQI
8th Aug 20257210 PMAQI
8th Aug 20257411 PMAQI
9th Aug 20257312 AMAQI
9th Aug 2025561 AMAQI
9th Aug 2025572 AMAQI
9th Aug 2025543 AMAQI
9th Aug 2025524 AMAQI
9th Aug 2025525 AMAQI

23°C20/30°C

9th Aug 2025516 AMAQI
9th Aug 2025537 AMAQI
9th Aug 2025528 AMAQI
9th Aug 2025489 AMAQI
9th Aug 20254610 AMAQI
9th Aug 20254411 AMAQI
9th Aug 20254212 PMAQI
9th Aug 2025421 PMAQI
9th Aug 2025452 PMAQI
9th Aug 2025503 PMAQI
9th Aug 2025514 PMAQI
9th Aug 2025505 PMAQI
9th Aug 2025516 PMAQI
9th Aug 2025517 PMAQI
9th Aug 2025528 PMAQI
9th Aug 2025529 PMAQI
9th Aug 20255210 PMAQI
9th Aug 20255211 PMAQI
10th Aug 20255212 AMAQI
10th Aug 2025421 AMAQI
10th Aug 2025382 AMAQI
10th Aug 2025363 AMAQI
10th Aug 2025344 AMAQI
10th Aug 2025325 AMAQI

23°C18/29°C

10th Aug 2025336 AMAQI
10th Aug 2025347 AMAQI
10th Aug 2025358 AMAQI
10th Aug 2025349 AMAQI
10th Aug 20253310 AMAQI
10th Aug 20253211 AMAQI
10th Aug 20253212 PMAQI
10th Aug 2025341 PMAQI
10th Aug 2025342 PMAQI
10th Aug 2025373 PMAQI
10th Aug 2025384 PMAQI
10th Aug 2025385 PMAQI
10th Aug 2025386 PMAQI
10th Aug 2025377 PMAQI
10th Aug 2025388 PMAQI
10th Aug 2025389 PMAQI
10th Aug 20253710 PMAQI
10th Aug 20253511 PMAQI
11th Aug 20253412 AMAQI
11th Aug 2025261 AMAQI
11th Aug 2025262 AMAQI
11th Aug 2025243 AMAQI
11th Aug 2025224 AMAQI
11th Aug 2025255 AMAQI

25°C18/32°C

11th Aug 2025256 AMAQI
11th Aug 2025257 AMAQI
11th Aug 2025288 AMAQI
11th Aug 2025279 AMAQI
11th Aug 20252810 AMAQI
11th Aug 20252611 AMAQI
11th Aug 20252612 PMAQI
11th Aug 2025231 PMAQI
11th Aug 2025242 PMAQI
11th Aug 2025223 PMAQI
11th Aug 2025204 PMAQI
11th Aug 2025215 PMAQI
11th Aug 2025196 PMAQI
11th Aug 2025267 PMAQI
11th Aug 2025218 PMAQI
11th Aug 2025189 PMAQI
11th Aug 20251810 PMAQI
11th Aug 20251911 PMAQI
12th Aug 20252112 AMAQI
12th Aug 2025191 AMAQI
12th Aug 2025212 AMAQI
12th Aug 2025223 AMAQI
12th Aug 2025224 AMAQI
12th Aug 2025245 AMAQI

25°C21/30°C

12th Aug 2025256 AMAQI
12th Aug 2025257 AMAQI
12th Aug 2025258 AMAQI
12th Aug 2025229 AMAQI
12th Aug 20252210 AMAQI
12th Aug 20252111 AMAQI
12th Aug 20252012 PMAQI
12th Aug 2025191 PMAQI
12th Aug 2025192 PMAQI
12th Aug 2025183 PMAQI
12th Aug 2025164 PMAQI
12th Aug 2025185 PMAQI
12th Aug 2025186 PMAQI
12th Aug 2025207 PMAQI
12th Aug 2025198 PMAQI
12th Aug 2025209 PMAQI
12th Aug 20251910 PMAQI
12th Aug 20252211 PMAQI
13th Aug 20252612 AMAQI
13th Aug 2025281 AMAQI
13th Aug 2025302 AMAQI
13th Aug 2025333 AMAQI
13th Aug 2025334 AMAQI
13th Aug 2025315 AMAQI

25°C23/29°C

13th Aug 2025326 AMAQI
13th Aug 2025327 AMAQI
13th Aug 2025308 AMAQI
13th Aug 2025239 AMAQI
13th Aug 20252110 AMAQI
13th Aug 20252111 AMAQI
13th Aug 20252012 PMAQI
13th Aug 2025181 PMAQI
13th Aug 2025172 PMAQI
13th Aug 2025183 PMAQI
13th Aug 2025224 PMAQI
13th Aug 2025255 PMAQI
13th Aug 2025236 PMAQI
13th Aug 2025247 PMAQI
13th Aug 2025258 PMAQI
13th Aug 2025249 PMAQI
13th Aug 20252410 PMAQI
13th Aug 20252411 PMAQI
14th Aug 20252612 AMAQI
14th Aug 2025261 AMAQI
14th Aug 2025262 AMAQI
14th Aug 2025273 AMAQI
14th Aug 2025294 AMAQI
14th Aug 2025315 AMAQI

25°C22/28°C

14th Aug 2025346 AMAQI
14th Aug 2025367 AMAQI
14th Aug 2025348 AMAQI
14th Aug 2025329 AMAQI
14th Aug 20252810 AMAQI
14th Aug 20252911 AMAQI
14th Aug 20252712 PMAQI
14th Aug 2025281 PMAQI
14th Aug 2025282 PMAQI
14th Aug 2025293 PMAQI
14th Aug 2025294 PMAQI
14th Aug 2025255 PMAQI
14th Aug 2025286 PMAQI
14th Aug 2025267 PMAQI
14th Aug 2025278 PMAQI
14th Aug 2025269 PMAQI
14th Aug 20252610 PMAQI
14th Aug 20252611 PMAQI
15th Aug 20252512 AMAQI
15th Aug 2025261 AMAQI
15th Aug 2025262 AMAQI
15th Aug 2025263 AMAQI
15th Aug 2025294 AMAQI
15th Aug 2025305 AMAQI

26°C24/30°C

15th Aug 2025346 AMAQI
15th Aug 2025357 AMAQI
15th Aug 2025378 AMAQI
15th Aug 2025349 AMAQI
15th Aug 20253810 AMAQI
15th Aug 20253911 AMAQI
15th Aug 20253812 PMAQI
15th Aug 2025351 PMAQI
15th Aug 2025362 PMAQI
15th Aug 2025343 PMAQI
15th Aug 2025364 PMAQI
15th Aug 2025345 PMAQI
15th Aug 2025336 PMAQI
15th Aug 2025347 PMAQI
15th Aug 2025338 PMAQI
15th Aug 2025369 PMAQI
15th Aug 20253610 PMAQI
15th Aug 20254011 PMAQI
16th Aug 20254212 AMAQI
16th Aug 2025431 AMAQI
16th Aug 2025452 AMAQI
16th Aug 2025473 AMAQI
16th Aug 2025464 AMAQI
16th Aug 2025475 AMAQI

27°C23/33°C

16th Aug 2025466 AMAQI
16th Aug 2025497 AMAQI
16th Aug 2025458 AMAQI
16th Aug 2025409 AMAQI
16th Aug 20253810 AMAQI
16th Aug 20253611 AMAQI
16th Aug 20253812 PMAQI
16th Aug 2025341 PMAQI
16th Aug 2025342 PMAQI
16th Aug 2025333 PMAQI
16th Aug 2025324 PMAQI
16th Aug 2025325 PMAQI
16th Aug 2025346 PMAQI
16th Aug 2025377 PMAQI
16th Aug 2025368 PMAQI
16th Aug 2025359 PMAQI
16th Aug 20253810 PMAQI
16th Aug 20254011 PMAQI
17th Aug 20254712 AMAQI
17th Aug 2025481 AMAQI
17th Aug 2025502 AMAQI
17th Aug 2025513 AMAQI
17th Aug 2025524 AMAQI
17th Aug 2025525 AMAQI

28°C23/32°C

17th Aug 2025526 AMAQI
17th Aug 2025527 AMAQI
17th Aug 2025498 AMAQI
17th Aug 2025499 AMAQI
17th Aug 20254710 AMAQI
17th Aug 20254611 AMAQI
17th Aug 20254412 PMAQI
17th Aug 2025421 PMAQI
17th Aug 2025432 PMAQI
17th Aug 2025423 PMAQI
17th Aug 2025424 PMAQI
17th Aug 2025415 PMAQI
17th Aug 2025406 PMAQI
17th Aug 2025437 PMAQI
17th Aug 2025448 PMAQI
17th Aug 2025439 PMAQI
17th Aug 20254210 PMAQI
17th Aug 20254111 PMAQI
18th Aug 20254312 AMAQI
18th Aug 2025451 AMAQI
18th Aug 2025462 AMAQI
18th Aug 2025473 AMAQI
18th Aug 2025474 AMAQI
18th Aug 2025505 AMAQI

28°C21/36°C

18th Aug 2025506 AMAQI
18th Aug 2025517 AMAQI
18th Aug 2025528 AMAQI
18th Aug 2025509 AMAQI
18th Aug 20254810 AMAQI
18th Aug 20254411 AMAQI
18th Aug 20254212 PMAQI
18th Aug 2025401 PMAQI
18th Aug 2025422 PMAQI
18th Aug 2025413 PMAQI
18th Aug 2025404 PMAQI
18th Aug 2025405 PMAQI
18th Aug 2025436 PMAQI
18th Aug 2025447 PMAQI
18th Aug 2025468 PMAQI
18th Aug 2025479 PMAQI
18th Aug 20255010 PMAQI
18th Aug 20255011 PMAQI
19th Aug 20255112 AMAQI
19th Aug 2025501 AMAQI
19th Aug 2025462 AMAQI
19th Aug 2025433 AMAQI
19th Aug 2025344 AMAQI
19th Aug 2025285 AMAQI

28°C23/34°C

19th Aug 2025226 AMAQI
19th Aug 2025187 AMAQI
19th Aug 2025198 AMAQI
19th Aug 2025199 AMAQI
19th Aug 20251910 AMAQI
19th Aug 20252011 AMAQI
19th Aug 20252212 PMAQI
19th Aug 2025231 PMAQI
19th Aug 2025262 PMAQI
19th Aug 2025273 PMAQI
19th Aug 2025264 PMAQI
19th Aug 2025225 PMAQI
19th Aug 2025226 PMAQI
19th Aug 2025257 PMAQI
19th Aug 2025248 PMAQI
19th Aug 2025249 PMAQI
19th Aug 20252710 PMAQI
19th Aug 20252811 PMAQI
20th Aug 20252612 AMAQI
20th Aug 2025261 AMAQI
20th Aug 2025272 AMAQI
20th Aug 2025273 AMAQI
20th Aug 2025244 AMAQI
20th Aug 2025245 AMAQI

25°C20/30°C

20th Aug 2025246 AMAQI
20th Aug 2025237 AMAQI
20th Aug 2025228 AMAQI
20th Aug 2025219 AMAQI
20th Aug 20251910 AMAQI
20th Aug 20252011 AMAQI
20th Aug 20252312 PMAQI
20th Aug 2025261 PMAQI
20th Aug 2025282 PMAQI
20th Aug 2025313 PMAQI
20th Aug 2025324 PMAQI
20th Aug 2025325 PMAQI
20th Aug 2025336 PMAQI
20th Aug 2025247 PMAQI
20th Aug 2025288 PMAQI
20th Aug 2025349 PMAQI
20th Aug 20253210 PMAQI
20th Aug 20253311 PMAQI
21st Aug 20253312 AMAQI
21st Aug 2025341 AMAQI
21st Aug 2025332 AMAQI
21st Aug 2025323 AMAQI
21st Aug 2025324 AMAQI
21st Aug 2025345 AMAQI

25°C22/30°C

21st Aug 2025326 AMAQI
21st Aug 2025317 AMAQI
21st Aug 2025328 AMAQI
21st Aug 2025329 AMAQI
21st Aug 20253810 AMAQI
21st Aug 20253111 AMAQI
21st Aug 20252912 PMAQI
21st Aug 2025281 PMAQI
21st Aug 2025262 PMAQI
21st Aug 2025253 PMAQI
21st Aug 2025284 PMAQI
21st Aug 2025275 PMAQI
21st Aug 2025226 PMAQI
21st Aug 2025327 PMAQI
21st Aug 2025288 PMAQI
21st Aug 2025239 PMAQI
21st Aug 20252610 PMAQI
21st Aug 20252411 PMAQI
22nd Aug 20252612 AMAQI
22nd Aug 2025271 AMAQI
22nd Aug 2025282 AMAQI
22nd Aug 2025293 AMAQI
22nd Aug 2025294 AMAQI
22nd Aug 2025325 AMAQI

26°C22/31°C

22nd Aug 2025286 AMAQI
22nd Aug 2025267 AMAQI
22nd Aug 2025268 AMAQI
22nd Aug 2025239 AMAQI
22nd Aug 20252210 AMAQI
22nd Aug 20252111 AMAQI
22nd Aug 20252112 PMAQI
22nd Aug 2025201 PMAQI
22nd Aug 2025212 PMAQI
22nd Aug 2025213 PMAQI
22nd Aug 2025214 PMAQI
22nd Aug 2025225 PMAQI
22nd Aug 2025216 PMAQI
22nd Aug 2025237 PMAQI
22nd Aug 2025248 PMAQI
22nd Aug 2025269 PMAQI
22nd Aug 20253010 PMAQI
22nd Aug 20253211 PMAQI
23rd Aug 20253412 AMAQI
23rd Aug 2025361 AMAQI
23rd Aug 2025382 AMAQI
23rd Aug 2025373 AMAQI
23rd Aug 2025344 AMAQI
23rd Aug 2025335 AMAQI

25°C21/29°C

23rd Aug 2025336 AMAQI
23rd Aug 2025337 AMAQI
23rd Aug 2025318 AMAQI
23rd Aug 2025329 AMAQI
23rd Aug 20253510 AMAQI
23rd Aug 20253311 AMAQI
23rd Aug 20253212 PMAQI
23rd Aug 2025311 PMAQI
23rd Aug 2025322 PMAQI
23rd Aug 2025323 PMAQI
23rd Aug 2025324 PMAQI
23rd Aug 2025315 PMAQI
23rd Aug 2025326 PMAQI
23rd Aug 2025327 PMAQI
23rd Aug 2025328 PMAQI
23rd Aug 2025319 PMAQI
23rd Aug 20253110 PMAQI
23rd Aug 20253411 PMAQI
24th Aug 20253512 AMAQI
24th Aug 2025381 AMAQI
24th Aug 2025392 AMAQI
24th Aug 2025383 AMAQI
24th Aug 2025384 AMAQI
24th Aug 2025405 AMAQI

24°C19/29°C

24th Aug 2025386 AMAQI
24th Aug 2025387 AMAQI
24th Aug 2025368 AMAQI
24th Aug 2025369 AMAQI
24th Aug 20253610 AMAQI
24th Aug 20253811 AMAQI
24th Aug 20253712 PMAQI
24th Aug 2025351 PMAQI
24th Aug 2025342 PMAQI
24th Aug 2025323 PMAQI
24th Aug 2025314 PMAQI
24th Aug 2025315 PMAQI
24th Aug 2025316 PMAQI
24th Aug 2025357 PMAQI
24th Aug 2025338 PMAQI
24th Aug 2025309 PMAQI
24th Aug 20253210 PMAQI
24th Aug 20253211 PMAQI
25th Aug 20253412 AMAQI
25th Aug 2025321 AMAQI
25th Aug 2025342 AMAQI
25th Aug 2025363 AMAQI
25th Aug 2025344 AMAQI
25th Aug 2025355 AMAQI

27°C20/33°C

25th Aug 2025366 AMAQI
25th Aug 2025367 AMAQI
25th Aug 2025398 AMAQI
25th Aug 2025369 AMAQI
25th Aug 20253710 AMAQI
25th Aug 20253811 AMAQI
25th Aug 20253812 PMAQI
25th Aug 2025391 PMAQI
25th Aug 2025382 PMAQI
25th Aug 2025383 PMAQI
25th Aug 2025384 PMAQI
25th Aug 2025395 PMAQI
25th Aug 2025386 PMAQI
25th Aug 2025367 PMAQI
25th Aug 2025378 PMAQI
25th Aug 2025389 PMAQI
25th Aug 20253610 PMAQI
25th Aug 20253811 PMAQI
26th Aug 20253612 AMAQI
26th Aug 2025331 AMAQI
26th Aug 2025322 AMAQI
26th Aug 2025303 AMAQI
26th Aug 2025304 AMAQI
26th Aug 2025295 AMAQI

26°C22/33°C

26th Aug 2025286 AMAQI
26th Aug 2025287 AMAQI
26th Aug 2025278 AMAQI
26th Aug 2025279 AMAQI
26th Aug 20252610 AMAQI
26th Aug 20252611 AMAQI
26th Aug 20252712 PMAQI
26th Aug 2025301 PMAQI
26th Aug 2025302 PMAQI
26th Aug 2025303 PMAQI
26th Aug 2025294 PMAQI
26th Aug 2025285 PMAQI
26th Aug 2025296 PMAQI
26th Aug 2025297 PMAQI
26th Aug 2025288 PMAQI
26th Aug 2025279 PMAQI
26th Aug 20252810 PMAQI
26th Aug 20253111 PMAQI
27th Aug 20253312 AMAQI
27th Aug 2025331 AMAQI
27th Aug 2025342 AMAQI
27th Aug 2025303 AMAQI
27th Aug 2025284 AMAQI
27th Aug 2025275 AMAQI

23°C17/29°C

27th Aug 2025276 AMAQI
27th Aug 2025267 AMAQI
27th Aug 2025268 AMAQI
27th Aug 2025279 AMAQI
27th Aug 20252610 AMAQI
27th Aug 20252611 AMAQI
27th Aug 20252612 PMAQI
27th Aug 2025261 PMAQI
27th Aug 2025262 PMAQI
27th Aug 2025263 PMAQI
27th Aug 2025234 PMAQI
27th Aug 2025245 PMAQI
27th Aug 2025246 PMAQI
27th Aug 2025287 PMAQI
27th Aug 2025258 PMAQI
27th Aug 2025249 PMAQI
27th Aug 20252610 PMAQI
27th Aug 20252611 PMAQI
28th Aug 20252812 AMAQI
28th Aug 2025301 AMAQI
28th Aug 2025302 AMAQI
28th Aug 2025323 AMAQI
28th Aug 2025334 AMAQI
28th Aug 2025325 AMAQI

23°C16/29°C

28th Aug 2025336 AMAQI
28th Aug 2025347 AMAQI
28th Aug 2025418 AMAQI
28th Aug 2025489 AMAQI
28th Aug 20254610 AMAQI
28th Aug 20254011 AMAQI
28th Aug 20253912 PMAQI
28th Aug 2025381 PMAQI
28th Aug 2025382 PMAQI
28th Aug 2025353 PMAQI
28th Aug 2025344 PMAQI
28th Aug 2025345 PMAQI
28th Aug 2025356 PMAQI
28th Aug 2025357 PMAQI
28th Aug 2025348 PMAQI
28th Aug 2025349 PMAQI
28th Aug 20253410 PMAQI
28th Aug 20253911 PMAQI
29th Aug 20254012 AMAQI
29th Aug 2025421 AMAQI
29th Aug 2025472 AMAQI
29th Aug 2025483 AMAQI
29th Aug 2025514 AMAQI
29th Aug 2025505 AMAQI

22°C16/28°C

29th Aug 2025506 AMAQI
6 AM
29th Aug 2025527 AMAQI
29th Aug 2025528 AMAQI
29th Aug 2025539 AMAQI
29th Aug 20254810 AMAQI
29th Aug 20254011 AMAQI
29th Aug 20253312 PMAQI
29th Aug 2025301 PMAQI
1 PM
29th Aug 2025312 PMAQI
29th Aug 2025283 PMAQI
8 PM
1 AM
5 AM

--°C/°C

Day time
Avg. Highest Time
6 AM - 8 PM

35AQI

15 hours / Day
450 hours / Month
Avg. Lowest Time
6 AM - 8 PM

35AQI

15 hours / Day
450 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 8 PM (Avg. 35), while the lowest AQI was between 6 AM to 8 PM (Avg. 35).
Night time
Avg. Highest Time
12 AM - 5 AM

37AQI

6 hours / Day
180 hours / Month
Avg. Lowest Time
9 PM - 11 PM

36AQI

3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 5 AM (Avg. 37), while the lowest AQI was between 9 PM to 11 PM (Avg. 36).

2025 Days Vs Air Quality

Research Triangle Park, Durham, North Carolina, United States

2025

86%

134

14%

21

Total number of days with different AQI categories in last 241 days in 2025 (124 days remaining)

Good
134 Days
Moderate
21 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days



Under WHO’s Safe Air Quality Limits: 86%

Health Risk Level:

Low

In 2025, 86% of 241 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

Research Triangle Park, Durham, North Carolina, 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
2nd January 2025
3rd January 2025
4th January 2025
5th January 2025
6th January 2025
7th January 2025
8th January 2025
9th January 2025
10th January 2025
11th January 2025
12th January 2025
13th January 2025
14th January 2025
15th January 2025
16th January 2025
17th January 2025
18th January 2025
19th January 2025
20th January 2025
21st January 2025
22nd January 2025
23rd January 2025
24th January 2025
25th January 2025
26th January 2025
27th January 2025
28th January 2025
29th January 2025
30th January 2025
31st January 2025
1st February 2025
2nd February 2025
3rd February 2025
4th February 2025
5th February 2025
6th February 2025
7th February 2025
8th February 2025
9th February 2025
10th February 2025
11th February 2025
12th February 2025
13th February 2025
14th February 2025
15th February 2025
16th February 2025
17th February 2025
18th February 2025
19th February 2025
20th February 2025
21st February 2025
22nd February 2025
23rd February 2025
24th February 2025
25th February 2025
26th February 2025
27th February 2025
28th February 2025
1st March 2025
2nd March 2025
3rd March 2025
4th March 2025
5th March 2025
6th March 2025
7th March 2025
8th March 2025
9th March 2025
10th March 2025
11th March 2025
12th March 2025
13th March 2025
14th March 2025
15th March 2025
16th March 2025
17th March 2025
18th March 2025
19th March 2025
20th March 2025
21st March 2025
22nd March 2025
23rd March 2025
24th March 2025
25th March 2025
26th March 2025
27th March 2025
21AQI
28th March 2025
41AQI
29th March 2025
39AQI
30th March 2025
34AQI
31st March 2025
36AQI
1st April 2025
20AQI
2nd April 2025
30AQI
3rd April 2025
47AQI
4th April 2025
50AQI
5th April 2025
51AQI
6th April 2025
34AQI
7th April 2025
37AQI
8th April 2025
23AQI
9th April 2025
20AQI
10th April 2025
30AQI
11th April 2025
26AQI
12th April 2025
19AQI
13th April 2025
22AQI
14th April 2025
40AQI
15th April 2025
40AQI
16th April 2025
23AQI
17th April 2025
32AQI
18th April 2025
50AQI
19th April 2025
43AQI
20th April 2025
51AQI
21st April 2025
53AQI
22nd April 2025
54AQI
23rd April 2025
48AQI
24th April 2025
52AQI
25th April 2025
53AQI
26th April 2025
41AQI
27th April 2025
24AQI
28th April 2025
25AQI
29th April 2025
35AQI
30th April 2025
52AQI
1st May 2025
56AQI
2nd May 2025
45AQI
3rd May 2025
34AQI
4th May 2025
21AQI
5th May 2025
33AQI
6th May 2025
30AQI
7th May 2025
33AQI
8th May 2025
44AQI
9th May 2025
29AQI
10th May 2025
24AQI
11th May 2025
34AQI
12th May 2025
28AQI
13th May 2025
20AQI
14th May 2025
31AQI
15th May 2025
43AQI
16th May 2025
54AQI
17th May 2025
35AQI
18th May 2025
27AQI
19th May 2025
27AQI
20th May 2025
33AQI
21st May 2025
36AQI
22nd May 2025
27AQI
23rd May 2025
18AQI
24th May 2025
21AQI
25th May 2025
25AQI
26th May 2025
31AQI
27th May 2025
20AQI
28th May 2025
17AQI
29th May 2025
30AQI
30th May 2025
27AQI
31st May 2025
36AQI
1st June 2025
50AQI
2nd June 2025
37AQI
3rd June 2025
36AQI
4th June 2025
49AQI
5th June 2025
38AQI
6th June 2025
44AQI
7th June 2025
36AQI
8th June 2025
36AQI
9th June 2025
35AQI
10th June 2025
33AQI
11th June 2025
46AQI
12th June 2025
45AQI
13th June 2025
36AQI
14th June 2025
30AQI
15th June 2025
34AQI
16th June 2025
32AQI
17th June 2025
29AQI
18th June 2025
35AQI
19th June 2025
34AQI
20th June 2025
28AQI
21st June 2025
41AQI
22nd June 2025
45AQI
23rd June 2025
57AQI
24th June 2025
60AQI
25th June 2025
62AQI
26th June 2025
53AQI
27th June 2025
53AQI
28th June 2025
45AQI
29th June 2025
50AQI
30th June 2025
48AQI
1st July 2025
38AQI
2nd July 2025
32AQI
3rd July 2025
32AQI
4th July 2025
54AQI
5th July 2025
67AQI
6th July 2025
35AQI
7th July 2025
32AQI
8th July 2025
54AQI
9th July 2025
49AQI
10th July 2025
33AQI
11th July 2025
34AQI
12th July 2025
45AQI
13th July 2025
39AQI
14th July 2025
38AQI
15th July 2025
31AQI
16th July 2025
31AQI
17th July 2025
35AQI
18th July 2025
35AQI
19th July 2025
34AQI
20th July 2025
28AQI
21st July 2025
42AQI
22nd July 2025
39AQI
23rd July 2025
55AQI
24th July 2025
43AQI
25th July 2025
44AQI
26th July 2025
49AQI
27th July 2025
51AQI
28th July 2025
30AQI
29th July 2025
41AQI
30th July 2025
35AQI
31st July 2025
41AQI
1st August 2025
34AQI
2nd August 2025
29AQI
3rd August 2025
36AQI
4th August 2025
39AQI
5th August 2025
39AQI
6th August 2025
30AQI
7th August 2025
45AQI
8th August 2025
82AQI
9th August 2025
52AQI
10th August 2025
36AQI
11th August 2025
24AQI
12th August 2025
21AQI
13th August 2025
26AQI
14th August 2025
28AQI
15th August 2025
33AQI
16th August 2025
40AQI
17th August 2025
46AQI
18th August 2025
46AQI
19th August 2025
29AQI
20th August 2025
27AQI
21st August 2025
29AQI
22nd August 2025
25AQI
23rd August 2025
33AQI
24th August 2025
35AQI
25th August 2025
37AQI
26th August 2025
29AQI
27th August 2025
27AQI
28th August 2025
35AQI
29th August 2025
30th August 2025
31st August 2025
1st September 2025
2nd September 2025
3rd September 2025
4th September 2025
5th September 2025
6th September 2025
7th September 2025
8th September 2025
9th September 2025
10th September 2025
11th September 2025
12th September 2025
13th September 2025
14th September 2025
15th September 2025
16th September 2025
17th September 2025
18th September 2025
19th September 2025
20th September 2025
21st September 2025
22nd September 2025
23rd September 2025
24th September 2025
25th September 2025
26th September 2025
27th September 2025
28th September 2025
29th September 2025
30th September 2025
1st October 2025
2nd October 2025
3rd October 2025
4th October 2025
5th October 2025
6th October 2025
7th October 2025
8th October 2025
9th October 2025
10th October 2025
11th October 2025
12th October 2025
13th October 2025
14th October 2025
15th October 2025
16th October 2025
17th October 2025
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

34AQI

38AQI

31AQI

42AQI

40AQI

35AQI


No. of days

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

202537AQI

5
23
7
29
2
25
5
26
5
26
2
134
21

Highest AQI recorded in

June

42AQI


Lowest AQI recorded in

May

31AQI


Most & Least Polluted Years Over the Last 1 Years

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


Research Triangle Park's annual 2025 AQI (37) shows an average percentage change of NaN% (improved AQI) compared to previous years: .