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HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

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
2026
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 (17th August):
On this day, AQI across the 2 years varied significantly: 2026 ranks 2nd highest AQI at 35 of Good air quality, showing improvement over 2025 on the same day.

Day & Night AQI Trend: 16th Aug - 17th Aug 2026

Research Triangle Park, Durham, North Carolina, United States

AQI
Day
Night
.

6 AM16th Aug 2026

8 PM

5 AM17th Aug 2026

Day time
Avg. Highest Time
5PM16th Aug

53AQI

Avg. Lowest Time
8PM16th Aug

33AQI

Night time
Avg. Highest Time
5AM17th Aug

44AQI

Avg. Lowest Time
12AM17th Aug

21AQI

In the last 24 hours,

Research Triangle Park's AQI reached its highest point of 53 at 5 PM during the Day, while the lowest point, 21, was recorded at 12 AM during the Night between 16th Aug and 17th Aug 2026.

Day & Night AQI Trend : Jul - Aug 2026

Research Triangle Park, Durham, North Carolina, United States

JulAug
19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th
Day
Night
19th Jul 2026256 AMAQI
19th Jul 2026447 AMAQI
19th Jul 2026428 AMAQI
19th Jul 2026429 AMAQI
19th Jul 20263310 AMAQI
19th Jul 20264611 AMAQI
19th Jul 20264212 PMAQI
19th Jul 2026521 PMAQI
19th Jul 2026492 PMAQI
19th Jul 2026493 PMAQI
19th Jul 2026324 PMAQI
19th Jul 2026465 PMAQI
19th Jul 2026536 PMAQI
19th Jul 2026507 PMAQI
19th Jul 2026218 PMAQI
19th Jul 2026559 PMAQI
19th Jul 20263610 PMAQI
19th Jul 20264411 PMAQI
20th Jul 20264812 AMAQI
20th Jul 2026521 AMAQI
20th Jul 2026422 AMAQI
20th Jul 2026253 AMAQI
20th Jul 2026404 AMAQI
20th Jul 2026295 AMAQI

29°C23/36°C

20th Jul 2026366 AMAQI
20th Jul 2026277 AMAQI
20th Jul 2026368 AMAQI
20th Jul 2026369 AMAQI
20th Jul 20263410 AMAQI
20th Jul 20262111 AMAQI
20th Jul 20264612 PMAQI
20th Jul 2026211 PMAQI
20th Jul 2026442 PMAQI
20th Jul 2026423 PMAQI
20th Jul 2026514 PMAQI
20th Jul 2026535 PMAQI
20th Jul 2026506 PMAQI
20th Jul 2026517 PMAQI
20th Jul 2026468 PMAQI
20th Jul 2026369 PMAQI
20th Jul 20264810 PMAQI
21st Jul 20264412 AMAQI
21st Jul 2026211 AMAQI
21st Jul 2026382 AMAQI
21st Jul 2026293 AMAQI
21st Jul 2026504 AMAQI
21st Jul 2026635 AMAQI

26°C22/32°C

21st Jul 2026596 AMAQI
21st Jul 2026647 AMAQI
21st Jul 2026448 AMAQI
21st Jul 2026469 AMAQI
21st Jul 20264610 AMAQI
21st Jul 20265111 AMAQI
21st Jul 20265112 PMAQI
21st Jul 2026531 PMAQI
21st Jul 2026542 PMAQI
21st Jul 2026513 PMAQI
21st Jul 2026464 PMAQI
21st Jul 2026445 PMAQI
21st Jul 2026506 PMAQI
21st Jul 2026487 PMAQI
21st Jul 2026468 PMAQI
21st Jul 2026519 PMAQI
21st Jul 20264810 PMAQI
21st Jul 20265211 PMAQI
22nd Jul 20265412 AMAQI
22nd Jul 2026531 AMAQI
22nd Jul 2026532 AMAQI
22nd Jul 2026563 AMAQI
22nd Jul 2026544 AMAQI
22nd Jul 2026565 AMAQI

29°C23/37°C

22nd Jul 2026556 AMAQI
22nd Jul 2026537 AMAQI
22nd Jul 2026488 AMAQI
22nd Jul 2026469 AMAQI
22nd Jul 20264610 AMAQI
22nd Jul 20265111 AMAQI
22nd Jul 20264812 PMAQI
22nd Jul 2026481 PMAQI
22nd Jul 2026512 PMAQI
22nd Jul 2026463 PMAQI
22nd Jul 2026504 PMAQI
22nd Jul 2026515 PMAQI
22nd Jul 2026546 PMAQI
22nd Jul 2026527 PMAQI
22nd Jul 2026538 PMAQI
22nd Jul 2026449 PMAQI
22nd Jul 20265010 PMAQI
22nd Jul 20264611 PMAQI
23rd Jul 20265212 AMAQI
23rd Jul 2026401 AMAQI
23rd Jul 2026212 AMAQI
23rd Jul 2026253 AMAQI
23rd Jul 2026274 AMAQI
23rd Jul 2026255 AMAQI

30°C25/36°C

23rd Jul 2026366 AMAQI
23rd Jul 2026257 AMAQI
23rd Jul 2026258 AMAQI
23rd Jul 2026219 AMAQI
23rd Jul 20262710 AMAQI
23rd Jul 20264811 AMAQI
23rd Jul 20264012 PMAQI
23rd Jul 2026361 PMAQI
23rd Jul 2026252 PMAQI
23rd Jul 2026233 PMAQI
23rd Jul 2026254 PMAQI
23rd Jul 2026425 PMAQI
23rd Jul 2026406 PMAQI
23rd Jul 2026387 PMAQI
23rd Jul 2026408 PMAQI
23rd Jul 2026389 PMAQI
23rd Jul 20264210 PMAQI
23rd Jul 20264211 PMAQI
24th Jul 20264012 AMAQI
24th Jul 2026401 AMAQI
24th Jul 2026402 AMAQI
24th Jul 2026403 AMAQI
24th Jul 2026404 AMAQI
24th Jul 2026325 AMAQI

23°C21/24°C

24th Jul 2026346 AMAQI
24th Jul 2026317 AMAQI
24th Jul 2026298 AMAQI
24th Jul 2026219 AMAQI
24th Jul 20262510 AMAQI
24th Jul 20262511 AMAQI
24th Jul 20262912 PMAQI
24th Jul 2026251 PMAQI
24th Jul 2026422 PMAQI
24th Jul 2026423 PMAQI
24th Jul 2026234 PMAQI
24th Jul 2026365 PMAQI
24th Jul 2026296 PMAQI
24th Jul 2026337 PMAQI
24th Jul 2026298 PMAQI
24th Jul 2026259 PMAQI
24th Jul 20262510 PMAQI
24th Jul 20262511 PMAQI
25th Jul 20262512 AMAQI
25th Jul 2026331 AMAQI
25th Jul 2026252 AMAQI
25th Jul 2026253 AMAQI
25th Jul 2026314 AMAQI
25th Jul 2026275 AMAQI

22°C20/24°C

25th Jul 2026346 AMAQI
25th Jul 2026297 AMAQI
25th Jul 2026298 AMAQI
25th Jul 2026299 AMAQI
25th Jul 20262910 AMAQI
25th Jul 20262511 AMAQI
25th Jul 20261912 PMAQI
25th Jul 2026311 PMAQI
25th Jul 2026362 PMAQI
25th Jul 2026363 PMAQI
25th Jul 2026384 PMAQI
25th Jul 2026345 PMAQI
25th Jul 2026346 PMAQI
25th Jul 2026297 PMAQI
25th Jul 2026328 PMAQI
25th Jul 2026329 PMAQI
25th Jul 20262510 PMAQI
25th Jul 20262111 PMAQI
26th Jul 20262312 AMAQI
26th Jul 2026251 AMAQI
26th Jul 2026212 AMAQI
26th Jul 2026243 AMAQI
26th Jul 2026284 AMAQI
26th Jul 2026215 AMAQI

21°C20/23°C

26th Jul 2026306 AMAQI
26th Jul 2026347 AMAQI
26th Jul 2026328 AMAQI
26th Jul 2026299 AMAQI
26th Jul 20262910 AMAQI
26th Jul 20263011 AMAQI
26th Jul 20263012 PMAQI
26th Jul 2026211 PMAQI
26th Jul 2026312 PMAQI
26th Jul 2026293 PMAQI
26th Jul 2026334 PMAQI
26th Jul 2026385 PMAQI
26th Jul 2026516 PMAQI
26th Jul 2026497 PMAQI
26th Jul 2026468 PMAQI
26th Jul 2026469 PMAQI
26th Jul 20264810 PMAQI
26th Jul 20264211 PMAQI
27th Jul 20264612 AMAQI
27th Jul 2026461 AMAQI
27th Jul 2026422 AMAQI
27th Jul 2026493 AMAQI
27th Jul 2026364 AMAQI
27th Jul 2026405 AMAQI

23°C19/29°C

27th Jul 2026476 AMAQI
27th Jul 2026447 AMAQI
27th Jul 2026368 AMAQI
27th Jul 2026389 AMAQI
27th Jul 20263410 AMAQI
27th Jul 20264011 AMAQI
27th Jul 20264412 PMAQI
27th Jul 2026421 PMAQI
27th Jul 2026482 PMAQI
27th Jul 2026483 PMAQI
27th Jul 2026524 PMAQI
27th Jul 2026545 PMAQI
27th Jul 2026546 PMAQI
27th Jul 2026527 PMAQI
27th Jul 2026548 PMAQI
27th Jul 2026569 PMAQI
27th Jul 20265510 PMAQI
27th Jul 20265311 PMAQI
28th Jul 20265612 AMAQI
28th Jul 2026571 AMAQI
28th Jul 2026592 AMAQI
28th Jul 2026593 AMAQI
28th Jul 2026604 AMAQI
28th Jul 2026605 AMAQI

26°C21/32°C

28th Jul 2026626 AMAQI
28th Jul 2026627 AMAQI
28th Jul 2026658 AMAQI
28th Jul 2026659 AMAQI
28th Jul 20266210 AMAQI
28th Jul 20266011 AMAQI
28th Jul 20266012 PMAQI
28th Jul 2026631 PMAQI
28th Jul 2026662 PMAQI
28th Jul 2026653 PMAQI
28th Jul 2026624 PMAQI
28th Jul 2026625 PMAQI
28th Jul 2026636 PMAQI
28th Jul 2026607 PMAQI
28th Jul 2026628 PMAQI
28th Jul 2026609 PMAQI
28th Jul 20266210 PMAQI
28th Jul 20264411 PMAQI
29th Jul 20264212 AMAQI
29th Jul 2026401 AMAQI
29th Jul 2026382 AMAQI
29th Jul 2026423 AMAQI
29th Jul 2026484 AMAQI
29th Jul 2026495 AMAQI

26°C21/32°C

29th Jul 2026456 AMAQI
29th Jul 2026497 AMAQI
29th Jul 2026478 AMAQI
29th Jul 2026499 AMAQI
29th Jul 20264710 AMAQI
29th Jul 20265011 AMAQI
29th Jul 20264812 PMAQI
29th Jul 2026521 PMAQI
29th Jul 2026512 PMAQI
29th Jul 2026533 PMAQI
29th Jul 2026534 PMAQI
29th Jul 2026535 PMAQI
29th Jul 2026536 PMAQI
29th Jul 2026537 PMAQI
29th Jul 2026488 PMAQI
29th Jul 2026509 PMAQI
29th Jul 20265110 PMAQI
29th Jul 20264611 PMAQI
30th Jul 20264812 AMAQI
30th Jul 2026441 AMAQI
30th Jul 2026502 AMAQI
30th Jul 2026443 AMAQI
30th Jul 2026424 AMAQI
30th Jul 2026425 AMAQI

26°C21/32°C

30th Jul 2026386 AMAQI
30th Jul 2026407 AMAQI
30th Jul 2026408 AMAQI
30th Jul 2026319 AMAQI
30th Jul 20262910 AMAQI
30th Jul 20263811 AMAQI
30th Jul 20264212 PMAQI
30th Jul 2026381 PMAQI
30th Jul 2026252 PMAQI
30th Jul 2026313 PMAQI
30th Jul 2026254 PMAQI
30th Jul 2026325 PMAQI
30th Jul 2026386 PMAQI
30th Jul 2026347 PMAQI
30th Jul 2026468 PMAQI
30th Jul 2026219 PMAQI
30th Jul 20263810 PMAQI
30th Jul 20262511 PMAQI
31st Jul 20262512 AMAQI
31st Jul 2026481 AMAQI
31st Jul 2026462 AMAQI
31st Jul 2026573 AMAQI
31st Jul 2026504 AMAQI
31st Jul 2026515 AMAQI

25°C18/33°C

31st Jul 2026406 AMAQI
31st Jul 2026487 AMAQI
31st Jul 2026368 AMAQI
31st Jul 2026389 AMAQI
31st Jul 20264810 AMAQI
31st Jul 20265211 AMAQI
31st Jul 20265512 PMAQI
31st Jul 2026531 PMAQI
31st Jul 2026402 PMAQI
31st Jul 2026383 PMAQI
31st Jul 2026304 PMAQI
31st Jul 2026425 PMAQI
31st Jul 2026346 PMAQI
31st Jul 2026367 PMAQI
31st Jul 2026408 PMAQI
31st Jul 2026409 PMAQI
31st Jul 20262110 PMAQI
31st Jul 20263211 PMAQI
1st Aug 20263212 AMAQI
1st Aug 2026511 AMAQI
1st Aug 2026472 AMAQI
1st Aug 2026443 AMAQI
1st Aug 2026444 AMAQI
1st Aug 2026495 AMAQI

25°C17/35°C

1st Aug 2026486 AMAQI
1st Aug 2026497 AMAQI
1st Aug 2026518 AMAQI
1st Aug 2026509 AMAQI
1st Aug 20264810 AMAQI
1st Aug 20265011 AMAQI
1st Aug 20264812 PMAQI
1st Aug 2026511 PMAQI
1st Aug 2026512 PMAQI
1st Aug 2026523 PMAQI
1st Aug 2026534 PMAQI
1st Aug 2026535 PMAQI
1st Aug 2026526 PMAQI
1st Aug 2026527 PMAQI
1st Aug 2026488 PMAQI
1st Aug 2026469 PMAQI
1st Aug 20264210 PMAQI
1st Aug 20264011 PMAQI
2nd Aug 20262512 AMAQI
2nd Aug 2026421 AMAQI
2nd Aug 2026402 AMAQI
2nd Aug 2026443 AMAQI
2nd Aug 2026464 AMAQI
2nd Aug 2026465 AMAQI

26°C20/35°C

2nd Aug 2026426 AMAQI
2nd Aug 2026497 AMAQI
2nd Aug 2026488 AMAQI
2nd Aug 2026499 AMAQI
2nd Aug 20265010 AMAQI
2nd Aug 20264811 AMAQI
2nd Aug 20264812 PMAQI
2nd Aug 2026501 PMAQI
2nd Aug 2026482 PMAQI
2nd Aug 2026443 PMAQI
2nd Aug 2026404 PMAQI
2nd Aug 2026345 PMAQI
2nd Aug 2026406 PMAQI
2nd Aug 2026387 PMAQI
2nd Aug 2026388 PMAQI
2nd Aug 2026469 PMAQI
2nd Aug 20263410 PMAQI
2nd Aug 20263411 PMAQI
3rd Aug 20263412 AMAQI
3rd Aug 2026211 AMAQI
3rd Aug 2026252 AMAQI
3rd Aug 2026253 AMAQI
3rd Aug 2026254 AMAQI
3rd Aug 2026255 AMAQI

26°C23/31°C

3rd Aug 2026386 AMAQI
3rd Aug 2026277 AMAQI
3rd Aug 2026308 AMAQI
3rd Aug 2026369 AMAQI
3rd Aug 20263810 AMAQI
3rd Aug 20263611 AMAQI
3rd Aug 20263412 PMAQI
3rd Aug 2026291 PMAQI
3rd Aug 2026322 PMAQI
3rd Aug 2026323 PMAQI
3rd Aug 2026424 PMAQI
3rd Aug 2026425 PMAQI
3rd Aug 2026466 PMAQI
3rd Aug 2026427 PMAQI
3rd Aug 2026408 PMAQI
3rd Aug 2026239 PMAQI
3rd Aug 20263610 PMAQI
3rd Aug 20263611 PMAQI
4th Aug 20264012 AMAQI
4th Aug 2026361 AMAQI
4th Aug 2026232 AMAQI
4th Aug 2026273 AMAQI
4th Aug 2026274 AMAQI
4th Aug 2026275 AMAQI

27°C23/33°C

4th Aug 2026366 AMAQI
4th Aug 2026347 AMAQI
4th Aug 2026348 AMAQI
4th Aug 2026319 AMAQI
4th Aug 20263210 AMAQI
4th Aug 20262111 AMAQI
4th Aug 20264812 PMAQI
4th Aug 2026421 PMAQI
4th Aug 2026402 PMAQI
4th Aug 2026483 PMAQI
4th Aug 2026444 PMAQI
4th Aug 2026515 PMAQI
4th Aug 2026426 PMAQI
4th Aug 2026387 PMAQI
4th Aug 2026388 PMAQI
4th Aug 2026369 PMAQI
4th Aug 20264610 PMAQI
4th Aug 20264211 PMAQI
5th Aug 20264212 AMAQI
5th Aug 2026251 AMAQI
5th Aug 2026402 AMAQI
5th Aug 2026403 AMAQI
5th Aug 2026294 AMAQI
5th Aug 2026365 AMAQI

26°C22/30°C

5th Aug 2026256 AMAQI
5th Aug 2026227 AMAQI
5th Aug 2026238 AMAQI
5th Aug 2026469 AMAQI
5th Aug 20264410 AMAQI
5th Aug 20264011 AMAQI
5th Aug 20264012 PMAQI
5th Aug 2026421 PMAQI
5th Aug 2026502 PMAQI
5th Aug 2026423 PMAQI
5th Aug 2026214 PMAQI
5th Aug 2026425 PMAQI
5th Aug 2026426 PMAQI
5th Aug 2026297 PMAQI
5th Aug 2026468 PMAQI
5th Aug 2026509 PMAQI
5th Aug 20263210 PMAQI
5th Aug 20264211 PMAQI
6th Aug 20264612 AMAQI
6th Aug 2026361 AMAQI
6th Aug 2026382 AMAQI
6th Aug 2026293 AMAQI
6th Aug 2026334 AMAQI
6th Aug 2026405 AMAQI

26°C23/31°C

6th Aug 2026256 AMAQI
6th Aug 2026347 AMAQI
6th Aug 2026488 AMAQI
6th Aug 2026279 AMAQI
6th Aug 20264210 AMAQI
6th Aug 20262911 AMAQI
6th Aug 20263612 PMAQI
6th Aug 2026361 PMAQI
6th Aug 2026482 PMAQI
6th Aug 2026463 PMAQI
6th Aug 2026514 PMAQI
6th Aug 2026445 PMAQI
6th Aug 2026466 PMAQI
6th Aug 2026217 PMAQI
6th Aug 2026408 PMAQI
6th Aug 2026589 PMAQI
6th Aug 20266410 PMAQI
6th Aug 20265411 PMAQI
7th Aug 20265612 AMAQI
7th Aug 2026231 AMAQI
7th Aug 2026212 AMAQI
7th Aug 2026253 AMAQI
7th Aug 2026214 AMAQI
7th Aug 2026255 AMAQI

28°C23/34°C

7th Aug 2026256 AMAQI
7th Aug 2026257 AMAQI
7th Aug 2026258 AMAQI
7th Aug 2026219 AMAQI
7th Aug 20263810 AMAQI
7th Aug 20264011 AMAQI
7th Aug 20264412 PMAQI
7th Aug 2026461 PMAQI
7th Aug 2026332 PMAQI
7th Aug 2026323 PMAQI
7th Aug 2026254 PMAQI
7th Aug 2026235 PMAQI
7th Aug 2026236 PMAQI
7th Aug 2026257 PMAQI
7th Aug 2026218 PMAQI
7th Aug 2026319 PMAQI
7th Aug 20265110 PMAQI
7th Aug 20263811 PMAQI
8th Aug 20262112 AMAQI
8th Aug 2026211 AMAQI
8th Aug 2026252 AMAQI
8th Aug 2026213 AMAQI
8th Aug 2026254 AMAQI
8th Aug 2026255 AMAQI

27°C21/36°C

8th Aug 2026296 AMAQI
8th Aug 2026257 AMAQI
8th Aug 2026258 AMAQI
8th Aug 2026259 AMAQI
8th Aug 20262910 AMAQI
8th Aug 20264611 AMAQI
8th Aug 20265512 PMAQI
8th Aug 2026441 PMAQI
8th Aug 2026462 PMAQI
8th Aug 2026423 PMAQI
8th Aug 2026424 PMAQI
8th Aug 2026405 PMAQI
8th Aug 2026466 PMAQI
8th Aug 2026447 PMAQI
8th Aug 2026538 PMAQI
8th Aug 2026539 PMAQI
8th Aug 20265310 PMAQI
8th Aug 20264011 PMAQI
9th Aug 20264612 AMAQI
9th Aug 2026461 AMAQI
9th Aug 2026422 AMAQI
9th Aug 2026443 AMAQI
9th Aug 2026424 AMAQI
9th Aug 2026385 AMAQI

28°C23/36°C

9th Aug 2026226 AMAQI
9th Aug 2026257 AMAQI
9th Aug 2026258 AMAQI
9th Aug 2026219 AMAQI
9th Aug 20263310 AMAQI
9th Aug 20265111 AMAQI
9th Aug 20264012 PMAQI
9th Aug 2026461 PMAQI
9th Aug 2026462 PMAQI
9th Aug 2026423 PMAQI
9th Aug 2026254 PMAQI
9th Aug 2026255 PMAQI
9th Aug 2026276 PMAQI
9th Aug 2026487 PMAQI
9th Aug 2026328 PMAQI
9th Aug 2026499 PMAQI
9th Aug 20264010 PMAQI
9th Aug 20262511 PMAQI
10th Aug 20263312 AMAQI
10th Aug 2026251 AMAQI
10th Aug 2026292 AMAQI
10th Aug 2026213 AMAQI
10th Aug 2026214 AMAQI
10th Aug 2026235 AMAQI

28°C22/34°C

10th Aug 2026216 AMAQI
10th Aug 2026257 AMAQI
10th Aug 2026238 AMAQI
10th Aug 2026259 AMAQI
10th Aug 20262510 AMAQI
10th Aug 20262711 AMAQI
10th Aug 20264212 PMAQI
10th Aug 2026251 PMAQI
10th Aug 2026362 PMAQI
10th Aug 2026483 PMAQI
10th Aug 2026464 PMAQI
10th Aug 2026465 PMAQI
10th Aug 2026256 PMAQI
10th Aug 2026217 PMAQI
10th Aug 2026298 PMAQI
10th Aug 2026239 PMAQI
10th Aug 20262510 PMAQI
10th Aug 20264211 PMAQI
11th Aug 20262512 AMAQI
11th Aug 2026251 AMAQI
11th Aug 2026292 AMAQI
11th Aug 2026253 AMAQI
11th Aug 2026304 AMAQI
11th Aug 2026335 AMAQI

28°C22/36°C

11th Aug 2026386 AMAQI
11th Aug 2026237 AMAQI
11th Aug 2026518 AMAQI
11th Aug 2026389 AMAQI
11th Aug 20264210 AMAQI
11th Aug 20264011 AMAQI
11th Aug 20264612 PMAQI
11th Aug 2026441 PMAQI
11th Aug 2026462 PMAQI
11th Aug 2026573 PMAQI
11th Aug 2026424 PMAQI
11th Aug 2026295 PMAQI
11th Aug 2026426 PMAQI
11th Aug 2026387 PMAQI
11th Aug 2026298 PMAQI
11th Aug 2026299 PMAQI
11th Aug 20262910 PMAQI
11th Aug 20262911 PMAQI
12th Aug 20263012 AMAQI
12th Aug 2026271 AMAQI
12th Aug 2026362 AMAQI
12th Aug 2026233 AMAQI
12th Aug 2026444 AMAQI
12th Aug 2026345 AMAQI

29°C23/37°C

12th Aug 2026316 AMAQI
12th Aug 2026237 AMAQI
12th Aug 2026258 AMAQI
12th Aug 2026259 AMAQI
12th Aug 20262510 AMAQI
12th Aug 20264611 AMAQI
12th Aug 20262912 PMAQI
12th Aug 2026421 PMAQI
12th Aug 2026252 PMAQI
12th Aug 2026293 PMAQI
12th Aug 2026234 PMAQI
12th Aug 2026335 PMAQI
12th Aug 2026236 PMAQI
12th Aug 2026427 PMAQI
12th Aug 2026448 PMAQI
12th Aug 2026389 PMAQI
12th Aug 20264010 PMAQI
12th Aug 20263611 PMAQI
13th Aug 20264212 AMAQI
13th Aug 2026401 AMAQI
13th Aug 2026402 AMAQI
13th Aug 2026403 AMAQI
13th Aug 2026424 AMAQI
13th Aug 2026425 AMAQI

27°C21/35°C

13th Aug 2026406 AMAQI
13th Aug 2026387 AMAQI
13th Aug 2026428 AMAQI
13th Aug 2026409 AMAQI
13th Aug 20264010 AMAQI
13th Aug 20264011 AMAQI
13th Aug 20264012 PMAQI
13th Aug 2026441 PMAQI
13th Aug 2026442 PMAQI
13th Aug 2026213 PMAQI
13th Aug 2026234 PMAQI
13th Aug 2026275 PMAQI
13th Aug 2026256 PMAQI
13th Aug 2026277 PMAQI
13th Aug 2026328 PMAQI
13th Aug 2026429 PMAQI
13th Aug 20262510 PMAQI
13th Aug 20262311 PMAQI
14th Aug 20262712 AMAQI
14th Aug 2026251 AMAQI
14th Aug 2026292 AMAQI
14th Aug 2026443 AMAQI
14th Aug 2026444 AMAQI
14th Aug 2026405 AMAQI

29°C22/37°C

14th Aug 2026466 AMAQI
14th Aug 2026447 AMAQI
14th Aug 2026448 AMAQI
14th Aug 2026449 AMAQI
14th Aug 20264410 AMAQI
14th Aug 20264211 AMAQI
14th Aug 20264012 PMAQI
14th Aug 2026401 PMAQI
14th Aug 2026422 PMAQI
14th Aug 2026423 PMAQI
14th Aug 2026444 PMAQI
14th Aug 2026425 PMAQI
14th Aug 2026406 PMAQI
14th Aug 2026537 PMAQI
14th Aug 2026448 PMAQI
14th Aug 2026469 PMAQI
14th Aug 20264810 PMAQI
14th Aug 20264611 PMAQI
15th Aug 20264612 AMAQI
15th Aug 2026231 AMAQI
15th Aug 2026482 AMAQI
15th Aug 2026423 AMAQI
15th Aug 2026424 AMAQI
15th Aug 2026405 AMAQI

29°C24/38°C

15th Aug 2026406 AMAQI
15th Aug 2026257 AMAQI
15th Aug 2026278 AMAQI
15th Aug 2026299 AMAQI
15th Aug 20262910 AMAQI
15th Aug 20262911 AMAQI
15th Aug 20262512 PMAQI
15th Aug 2026441 PMAQI
15th Aug 2026382 PMAQI
15th Aug 2026383 PMAQI
15th Aug 2026444 PMAQI
15th Aug 2026385 PMAQI
15th Aug 2026426 PMAQI
15th Aug 2026427 PMAQI
15th Aug 2026278 PMAQI
15th Aug 2026429 PMAQI
15th Aug 20262910 PMAQI
15th Aug 20262911 PMAQI
16th Aug 20262512 AMAQI
16th Aug 2026441 AMAQI
16th Aug 2026422 AMAQI
16th Aug 2026383 AMAQI
16th Aug 2026384 AMAQI
16th Aug 2026405 AMAQI

28°C24/36°C

16th Aug 2026406 AMAQI
16th Aug 2026427 AMAQI
16th Aug 2026428 AMAQI
16th Aug 2026429 AMAQI
16th Aug 20264010 AMAQI
16th Aug 20264211 AMAQI
16th Aug 20264012 PMAQI
16th Aug 2026401 PMAQI
16th Aug 2026442 PMAQI
16th Aug 2026383 PMAQI
16th Aug 2026424 PMAQI
16th Aug 2026535 PMAQI
16th Aug 2026366 PMAQI
16th Aug 2026387 PMAQI
16th Aug 2026338 PMAQI
16th Aug 2026279 PMAQI
16th Aug 20262510 PMAQI
16th Aug 20262911 PMAQI
17th Aug 20262112 AMAQI
17th Aug 2026291 AMAQI
17th Aug 2026232 AMAQI
17th Aug 2026253 AMAQI
17th Aug 2026274 AMAQI
17th Aug 2026445 AMAQI

17°C10/29°C

17th Aug 2026256 AMAQI
6 AM
17th Aug 2026297 AMAQI
17th Aug 2026298 AMAQI
17th Aug 2026299 AMAQI
17th Aug 20262510 AMAQI
17th Aug 20264611 AMAQI
17th Aug 20265112 PMAQI
17th Aug 2026481 PMAQI
1 PM
17th Aug 2026462 PMAQI
17th Aug 2026443 PMAQI
17th Aug 2026444 PMAQI
17th Aug 2026425 PMAQI
17th Aug 2026486 PMAQI
17th Aug 2026567 PMAQI
17th Aug 2026318 PMAQI
8 PM
17th Aug 2026329 PMAQI
17th Aug 20262110 PMAQI
17th Aug 20262311 PMAQI
1 AM
5 AM

29°C23/38°C

Day time
Avg. Highest Time
12 PM - 3 PM

42AQI

4 hours / Day
120 hours / Month
Avg. Lowest Time
6 AM - 10 AM

37AQI

5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 PM to 3 PM (Avg. 42), while the lowest AQI was between 6 AM to 10 AM (Avg. 37).
Night time
Avg. Highest Time
9 PM - 10 PM

41AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
1 AM - 3 AM

36AQI

3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 PM to 10 PM (Avg. 41), while the lowest AQI was between 1 AM to 3 AM (Avg. 36).

2026 Days Vs Air Quality

Research Triangle Park, Durham, North Carolina, United States

2026

96%

217

4%

9

Total number of days with different AQI categories in last 229 days in 2026 (136 days remaining)

Good
217 Days
Moderate
9 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 96%

Health Risk Level:

Very Low

In 2026, 96% of 229 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.

Annual Air Quality Insights

Research Triangle Park, Durham, North Carolina, United States

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
21AQI (US)
2nd January 2026
28AQI (US)
3rd January 2026
34AQI (US)
4th January 2026
33AQI (US)
5th January 2026
43AQI (US)
6th January 2026
52AQI (US)
7th January 2026
38AQI (US)
8th January 2026
45AQI (US)
9th January 2026
43AQI (US)
10th January 2026
52AQI (US)
11th January 2026
16AQI (US)
12th January 2026
20AQI (US)
13th January 2026
35AQI (US)
14th January 2026
45AQI (US)
15th January 2026
24AQI (US)
16th January 2026
22AQI (US)
17th January 2026
50AQI (US)
18th January 2026
38AQI (US)
19th January 2026
27AQI (US)
20th January 2026
23AQI (US)
21st January 2026
24AQI (US)
22nd January 2026
32AQI (US)
23rd January 2026
33AQI (US)
24th January 2026
29AQI (US)
25th January 2026
48AQI (US)
26th January 2026
41AQI (US)
27th January 2026
26AQI (US)
28th January 2026
21AQI (US)
29th January 2026
31AQI (US)
30th January 2026
44AQI (US)
31st January 2026
37AQI (US)
1st February 2026
50AQI (US)
2nd February 2026
43AQI (US)
3rd February 2026
23AQI (US)
4th February 2026
26AQI (US)
5th February 2026
31AQI (US)
6th February 2026
33AQI (US)
7th February 2026
40AQI (US)
8th February 2026
46AQI (US)
9th February 2026
24AQI (US)
10th February 2026
34AQI (US)
11th February 2026
34AQI (US)
12th February 2026
29AQI (US)
13th February 2026
31AQI (US)
14th February 2026
28AQI (US)
15th February 2026
31AQI (US)
16th February 2026
42AQI (US)
17th February 2026
25AQI (US)
18th February 2026
33AQI (US)
19th February 2026
31AQI (US)
20th February 2026
27AQI (US)
21st February 2026
24AQI (US)
22nd February 2026
36AQI (US)
23rd February 2026
39AQI (US)
24th February 2026
41AQI (US)
25th February 2026
39AQI (US)
26th February 2026
29AQI (US)
27th February 2026
23AQI (US)
28th February 2026
25AQI (US)
1st March 2026
28AQI (US)
2nd March 2026
37AQI (US)
3rd March 2026
23AQI (US)
4th March 2026
26AQI (US)
5th March 2026
30AQI (US)
6th March 2026
19AQI (US)
7th March 2026
23AQI (US)
8th March 2026
17AQI (US)
9th March 2026
25AQI (US)
10th March 2026
25AQI (US)
11th March 2026
37AQI (US)
12th March 2026
32AQI (US)
13th March 2026
36AQI (US)
14th March 2026
23AQI (US)
15th March 2026
16AQI (US)
16th March 2026
22AQI (US)
17th March 2026
34AQI (US)
18th March 2026
28AQI (US)
19th March 2026
24AQI (US)
20th March 2026
29AQI (US)
21st March 2026
32AQI (US)
22nd March 2026
29AQI (US)
23rd March 2026
34AQI (US)
24th March 2026
33AQI (US)
25th March 2026
24AQI (US)
26th March 2026
31AQI (US)
27th March 2026
25AQI (US)
28th March 2026
29AQI (US)
29th March 2026
23AQI (US)
30th March 2026
20AQI (US)
31st March 2026
19AQI (US)
1st April 2026
24AQI (US)
2nd April 2026
19AQI (US)
3rd April 2026
15AQI (US)
4th April 2026
24AQI (US)
5th April 2026
27AQI (US)
6th April 2026
32AQI (US)
7th April 2026
20AQI (US)
8th April 2026
25AQI (US)
9th April 2026
20AQI (US)
10th April 2026
24AQI (US)
11th April 2026
28AQI (US)
12th April 2026
24AQI (US)
13th April 2026
21AQI (US)
14th April 2026
29AQI (US)
15th April 2026
30AQI (US)
16th April 2026
32AQI (US)
17th April 2026
18th April 2026
23AQI (US)
19th April 2026
27AQI (US)
20th April 2026
19AQI (US)
21st April 2026
16AQI (US)
22nd April 2026
23rd April 2026
20AQI (US)
24th April 2026
26AQI (US)
25th April 2026
28AQI (US)
26th April 2026
32AQI (US)
27th April 2026
26AQI (US)
28th April 2026
24AQI (US)
29th April 2026
18AQI (US)
30th April 2026
18AQI (US)
1st May 2026
22AQI (US)
2nd May 2026
16AQI (US)
3rd May 2026
19AQI (US)
4th May 2026
30AQI (US)
5th May 2026
32AQI (US)
6th May 2026
27AQI (US)
7th May 2026
21AQI (US)
8th May 2026
20AQI (US)
9th May 2026
10th May 2026
23AQI (US)
11th May 2026
24AQI (US)
12th May 2026
26AQI (US)
13th May 2026
22AQI (US)
14th May 2026
16AQI (US)
15th May 2026
36AQI (US)
16th May 2026
46AQI (US)
17th May 2026
51AQI (US)
18th May 2026
54AQI (US)
19th May 2026
55AQI (US)
20th May 2026
51AQI (US)
21st May 2026
44AQI (US)
22nd May 2026
40AQI (US)
23rd May 2026
45AQI (US)
24th May 2026
43AQI (US)
25th May 2026
43AQI (US)
26th May 2026
21AQI (US)
27th May 2026
14AQI (US)
28th May 2026
15AQI (US)
29th May 2026
16AQI (US)
30th May 2026
16AQI (US)
31st May 2026
13AQI (US)
1st June 2026
19AQI (US)
2nd June 2026
14AQI (US)
3rd June 2026
14AQI (US)
4th June 2026
17AQI (US)
5th June 2026
19AQI (US)
6th June 2026
21AQI (US)
7th June 2026
19AQI (US)
8th June 2026
22AQI (US)
9th June 2026
17AQI (US)
10th June 2026
19AQI (US)
11th June 2026
17AQI (US)
12th June 2026
19AQI (US)
13th June 2026
12AQI (US)
14th June 2026
15AQI (US)
15th June 2026
13AQI (US)
16th June 2026
17AQI (US)
17th June 2026
33AQI (US)
18th June 2026
21AQI (US)
19th June 2026
15AQI (US)
20th June 2026
15AQI (US)
21st June 2026
13AQI (US)
22nd June 2026
14AQI (US)
23rd June 2026
13AQI (US)
24th June 2026
14AQI (US)
25th June 2026
17AQI (US)
26th June 2026
21AQI (US)
27th June 2026
18AQI (US)
28th June 2026
18AQI (US)
29th June 2026
16AQI (US)
30th June 2026
13AQI (US)
1st July 2026
17AQI (US)
2nd July 2026
30AQI (US)
3rd July 2026
26AQI (US)
4th July 2026
30AQI (US)
5th July 2026
23AQI (US)
6th July 2026
25AQI (US)
7th July 2026
15AQI (US)
8th July 2026
14AQI (US)
9th July 2026
15AQI (US)
10th July 2026
15AQI (US)
11th July 2026
18AQI (US)
12th July 2026
15AQI (US)
13th July 2026
16AQI (US)
14th July 2026
17AQI (US)
15th July 2026
18AQI (US)
16th July 2026
21AQI (US)
17th July 2026
51AQI (US)
18th July 2026
50AQI (US)
19th July 2026
43AQI (US)
20th July 2026
40AQI (US)
21st July 2026
48AQI (US)
22nd July 2026
51AQI (US)
23rd July 2026
33AQI (US)
24th July 2026
32AQI (US)
25th July 2026
30AQI (US)
26th July 2026
33AQI (US)
27th July 2026
46AQI (US)
28th July 2026
61AQI (US)
29th July 2026
48AQI (US)
30th July 2026
37AQI (US)
31st July 2026
42AQI (US)
1st August 2026
48AQI (US)
2nd August 2026
43AQI (US)
3rd August 2026
33AQI (US)
4th August 2026
37AQI (US)
5th August 2026
37AQI (US)
6th August 2026
40AQI (US)
7th August 2026
31AQI (US)
8th August 2026
36AQI (US)
9th August 2026
37AQI (US)
10th August 2026
29AQI (US)
11th August 2026
36AQI (US)
12th August 2026
32AQI (US)
13th August 2026
36AQI (US)
14th August 2026
42AQI (US)
15th August 2026
36AQI (US)
16th August 2026
38AQI (US)
17th August 2026
35AQI (US)
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

34AQI (US)

33AQI (US)

27AQI (US)

24AQI (US)

30AQI (US)

17AQI (US)

31AQI (US)

37AQI (US)

No. of days

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

202629AQI (US)

29
2
28
31
28
26
4
30
28
3
17
217
9

Highest AQI (US) recorded in

August

37AQI (US)

Lowest AQI (US) recorded in

June

17AQI (US)

202537AQI (US)

5
23
7
29
2
25
5
26
5
29
2
26
4
29
2
23
7
23
8
238
42

Highest AQI (US) recorded in

June

42AQI (US)

Lowest AQI (US) recorded in

May

31AQI (US)

Most & Least Polluted Years Over the Last 2 Years

Most Polluted Year Recorded
2025(Avg.)
37AQI (US)
Least Polluted Year Recorded
2026(Avg.)
29AQI (US)

Research Triangle Park's annual 2026 AQI (US) (29) shows an average percentage change of -21.6% (improved AQI (US)) compared to previous years: 2025 (37).