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HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Faculty of Engineering National University of Laos Purple Air Project, Vientiane, Viangchan, Laos Historical Air Quality Analysis

Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!

Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+

July Air Quality Analysis

Faculty of Engineering National University of Laos Purple Air Project, Vientiane, Viangchan, Laos

2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
1st Jul 2023
68AQI
Lowest AQI recorded on
6th Jul 2026
26AQI

Same Day Analysis (16th July):
On this day, AQI across the 4 years varied significantly: 2026 ranks 2nd highest AQI at 43 of Good air quality, showing improvement over 2025 on the same day.

Day & Night AQI Trend: 15th Jul - 16th Jul 2026

Faculty of Engineering National University of Laos Purple Air Project, Vientiane, Viangchan, Laos

AQI
Day
Night
.

5 AM15th Jul 2026

6 PM

4 AM16th Jul 2026

Day time
Avg. Highest Time
6PM15th Jul

38AQI

Avg. Lowest Time
7AM15th Jul

17AQI

Night time
Avg. Highest Time
8PM15th Jul

66AQI

Avg. Lowest Time
9PM15th Jul

30AQI

In the last 24 hours,

Faculty of Engineering National University of Laos Purple Air Project's AQI reached its highest point of 66 at 8 PM during the Night, while the lowest point, 17, was recorded at 7 AM during the Day between 15th Jul and 16th Jul 2026.

Day & Night AQI Trend : Jun - Jul 2026

Faculty of Engineering National University of Laos Purple Air Project, Vientiane, Viangchan, Laos

JunJul
17th - 18th18th - 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
Day
Night
17th Jun 2026585 AMAQI
17th Jun 2026406 AMAQI
17th Jun 2026347 AMAQI
17th Jun 2026308 AMAQI
17th Jun 2026349 AMAQI
17th Jun 20263010 AMAQI
17th Jun 20263611 AMAQI
17th Jun 20265312 PMAQI
17th Jun 2026321 PMAQI
17th Jun 2026322 PMAQI
17th Jun 2026303 PMAQI
17th Jun 2026294 PMAQI
17th Jun 2026265 PMAQI
17th Jun 2026306 PMAQI
17th Jun 2026307 PMAQI
17th Jun 2026328 PMAQI
17th Jun 2026309 PMAQI
17th Jun 20266210 PMAQI
17th Jun 20265811 PMAQI
18th Jun 20265212 AMAQI
18th Jun 2026461 AMAQI
18th Jun 2026362 AMAQI
18th Jun 2026423 AMAQI
18th Jun 2026334 AMAQI

27°C25/32°C

18th Jun 2026345 AMAQI
18th Jun 2026366 AMAQI
18th Jun 2026527 AMAQI
18th Jun 2026558 AMAQI
18th Jun 2026449 AMAQI
18th Jun 20267010 AMAQI
18th Jun 20266011 AMAQI
18th Jun 20263412 PMAQI
18th Jun 2026311 PMAQI
18th Jun 2026332 PMAQI
18th Jun 2026293 PMAQI
18th Jun 2026264 PMAQI
18th Jun 2026305 PMAQI
18th Jun 2026286 PMAQI
18th Jun 2026307 PMAQI
18th Jun 2026308 PMAQI
18th Jun 2026289 PMAQI
18th Jun 20263010 PMAQI
18th Jun 20263211 PMAQI
19th Jun 20263112 AMAQI
19th Jun 2026301 AMAQI
19th Jun 2026312 AMAQI
19th Jun 2026273 AMAQI
19th Jun 2026314 AMAQI

28°C25/34°C

19th Jun 2026335 AMAQI
19th Jun 2026346 AMAQI
19th Jun 2026517 AMAQI
19th Jun 2026408 AMAQI
19th Jun 2026349 AMAQI
19th Jun 20263410 AMAQI
19th Jun 20263211 AMAQI
19th Jun 20263612 PMAQI
19th Jun 2026301 PMAQI
19th Jun 2026302 PMAQI
19th Jun 2026283 PMAQI
19th Jun 2026264 PMAQI
19th Jun 2026285 PMAQI
19th Jun 2026266 PMAQI
19th Jun 2026277 PMAQI
19th Jun 2026368 PMAQI
19th Jun 2026579 PMAQI
19th Jun 20263310 PMAQI
19th Jun 20263111 PMAQI
20th Jun 20263212 AMAQI
20th Jun 2026301 AMAQI
20th Jun 2026282 AMAQI
20th Jun 2026303 AMAQI
20th Jun 2026314 AMAQI

28°C24/33°C

20th Jun 2026305 AMAQI
20th Jun 2026326 AMAQI
20th Jun 2026447 AMAQI
20th Jun 2026408 AMAQI
20th Jun 2026329 AMAQI
20th Jun 20262910 AMAQI
20th Jun 20263111 AMAQI
20th Jun 20263012 PMAQI
20th Jun 2026361 PMAQI
20th Jun 2026302 PMAQI
20th Jun 2026283 PMAQI
20th Jun 2026324 PMAQI
20th Jun 2026285 PMAQI
20th Jun 2026336 PMAQI
20th Jun 2026287 PMAQI
20th Jun 2026368 PMAQI
20th Jun 2026319 PMAQI
20th Jun 20263610 PMAQI
20th Jun 20263811 PMAQI
21st Jun 20263312 AMAQI
21st Jun 2026331 AMAQI
21st Jun 2026282 AMAQI
21st Jun 2026313 AMAQI
21st Jun 2026304 AMAQI

25°C23/26°C

21st Jun 2026285 AMAQI
21st Jun 2026286 AMAQI
21st Jun 2026247 AMAQI
21st Jun 2026258 AMAQI
21st Jun 2026309 AMAQI
21st Jun 20262910 AMAQI
21st Jun 20262611 AMAQI
21st Jun 20262612 PMAQI
21st Jun 2026271 PMAQI
21st Jun 2026222 PMAQI
21st Jun 2026223 PMAQI
21st Jun 2026244 PMAQI
21st Jun 2026225 PMAQI
21st Jun 2026246 PMAQI
21st Jun 2026227 PMAQI
21st Jun 2026338 PMAQI
21st Jun 2026249 PMAQI
21st Jun 20262610 PMAQI
21st Jun 20262411 PMAQI
22nd Jun 20262612 AMAQI
22nd Jun 2026261 AMAQI
22nd Jun 2026282 AMAQI
22nd Jun 2026263 AMAQI
22nd Jun 2026264 AMAQI

27°C23/32°C

22nd Jun 2026285 AMAQI
22nd Jun 2026266 AMAQI
22nd Jun 2026227 AMAQI
22nd Jun 2026248 AMAQI
22nd Jun 2026309 AMAQI
22nd Jun 20262710 AMAQI
22nd Jun 20262411 AMAQI
22nd Jun 20262612 PMAQI
22nd Jun 2026261 PMAQI
22nd Jun 2026242 PMAQI
22nd Jun 2026253 PMAQI
22nd Jun 2026264 PMAQI
22nd Jun 2026275 PMAQI
22nd Jun 2026266 PMAQI
22nd Jun 2026587 PMAQI
22nd Jun 2026318 PMAQI
22nd Jun 2026409 PMAQI
22nd Jun 20266010 PMAQI
22nd Jun 20266011 PMAQI
23rd Jun 20265212 AMAQI
23rd Jun 2026561 AMAQI
23rd Jun 2026502 AMAQI
23rd Jun 2026553 AMAQI
23rd Jun 2026384 AMAQI

28°C24/33°C

23rd Jun 2026345 AMAQI
23rd Jun 2026316 AMAQI
23rd Jun 2026337 AMAQI
23rd Jun 2026338 AMAQI
23rd Jun 2026369 AMAQI
23rd Jun 20263610 AMAQI
23rd Jun 20263211 AMAQI
23rd Jun 20263212 PMAQI
23rd Jun 2026281 PMAQI
23rd Jun 2026292 PMAQI
23rd Jun 2026263 PMAQI
23rd Jun 2026294 PMAQI
23rd Jun 2026265 PMAQI
23rd Jun 2026266 PMAQI
23rd Jun 2026297 PMAQI
23rd Jun 2026338 PMAQI
23rd Jun 2026529 PMAQI
23rd Jun 20268310 PMAQI
23rd Jun 20267611 PMAQI
24th Jun 20266512 AMAQI
24th Jun 2026691 AMAQI
24th Jun 2026632 AMAQI
24th Jun 2026743 AMAQI
24th Jun 2026584 AMAQI

27°C25/33°C

24th Jun 2026555 AMAQI
24th Jun 2026536 AMAQI
24th Jun 2026557 AMAQI
24th Jun 2026488 AMAQI
24th Jun 2026429 AMAQI
24th Jun 20264210 AMAQI
24th Jun 20262511 AMAQI
24th Jun 20262112 PMAQI
24th Jun 2026211 PMAQI
24th Jun 2026212 PMAQI
24th Jun 2026233 PMAQI
24th Jun 2026214 PMAQI
24th Jun 2026215 PMAQI
24th Jun 2026176 PMAQI
24th Jun 2026277 PMAQI
24th Jun 2026368 PMAQI
24th Jun 2026469 PMAQI
24th Jun 20264210 PMAQI
24th Jun 20263811 PMAQI
25th Jun 20264212 AMAQI
25th Jun 2026401 AMAQI
25th Jun 2026362 AMAQI
25th Jun 2026313 AMAQI
25th Jun 2026294 AMAQI

29°C25/34°C

25th Jun 2026335 AMAQI
25th Jun 2026366 AMAQI
25th Jun 2026467 AMAQI
25th Jun 2026488 AMAQI
25th Jun 2026299 AMAQI
25th Jun 20261910 AMAQI
25th Jun 20261511 AMAQI
25th Jun 20261412 PMAQI
25th Jun 2026191 PMAQI
25th Jun 2026162 PMAQI
25th Jun 2026153 PMAQI
25th Jun 2026124 PMAQI
25th Jun 2026125 PMAQI
25th Jun 2026106 PMAQI
25th Jun 2026167 PMAQI
25th Jun 2026198 PMAQI
25th Jun 2026369 PMAQI
25th Jun 20263410 PMAQI
25th Jun 20262811 PMAQI
26th Jun 20262712 AMAQI
26th Jun 2026231 AMAQI
26th Jun 2026162 AMAQI
26th Jun 2026123 AMAQI
26th Jun 2026144 AMAQI

30°C25/35°C

26th Jun 2026145 AMAQI
26th Jun 2026176 AMAQI
26th Jun 2026197 AMAQI
26th Jun 2026258 AMAQI
26th Jun 2026259 AMAQI
26th Jun 20264710 AMAQI
26th Jun 20265811 AMAQI
26th Jun 20267212 PMAQI
26th Jun 2026401 PMAQI
26th Jun 2026382 PMAQI
26th Jun 2026243 PMAQI
26th Jun 2026224 PMAQI
26th Jun 2026335 PMAQI
26th Jun 2026506 PMAQI
26th Jun 2026487 PMAQI
26th Jun 2026558 PMAQI
26th Jun 2026559 PMAQI
26th Jun 20264710 PMAQI
26th Jun 20262511 PMAQI
27th Jun 20262712 AMAQI
27th Jun 2026251 AMAQI
27th Jun 2026252 AMAQI
27th Jun 2026273 AMAQI
27th Jun 2026254 AMAQI

30°C26/35°C

27th Jun 2026275 AMAQI
27th Jun 2026296 AMAQI
27th Jun 2026177 AMAQI
27th Jun 2026408 AMAQI
27th Jun 2026299 AMAQI
27th Jun 20262510 AMAQI
27th Jun 20263811 AMAQI
27th Jun 20261212 PMAQI
27th Jun 2026381 PMAQI
27th Jun 2026692 PMAQI
27th Jun 2026383 PMAQI
27th Jun 2026214 PMAQI
27th Jun 2026235 PMAQI
27th Jun 2026236 PMAQI
27th Jun 2026367 PMAQI
27th Jun 2026508 PMAQI
27th Jun 2026609 PMAQI
27th Jun 20263610 PMAQI
27th Jun 20263811 PMAQI
28th Jun 20263112 AMAQI
28th Jun 2026251 AMAQI
28th Jun 2026212 AMAQI
28th Jun 2026313 AMAQI
28th Jun 2026254 AMAQI

29°C25/35°C

28th Jun 2026285 AMAQI
28th Jun 2026346 AMAQI
28th Jun 2026627 AMAQI
28th Jun 2026388 AMAQI
28th Jun 2026469 AMAQI
28th Jun 20264610 AMAQI
28th Jun 20263111 AMAQI
28th Jun 20263012 PMAQI
28th Jun 2026301 PMAQI
28th Jun 2026302 PMAQI
28th Jun 2026303 PMAQI
28th Jun 2026314 PMAQI
28th Jun 2026315 PMAQI
28th Jun 2026346 PMAQI
28th Jun 2026337 PMAQI
28th Jun 2026348 PMAQI
28th Jun 2026389 PMAQI
28th Jun 20263610 PMAQI
28th Jun 20263811 PMAQI
29th Jun 20265412 AMAQI
29th Jun 2026541 AMAQI
29th Jun 2026402 AMAQI
29th Jun 2026343 AMAQI
29th Jun 2026324 AMAQI

29°C25/34°C

29th Jun 2026305 AMAQI
29th Jun 2026316 AMAQI
29th Jun 2026337 AMAQI
29th Jun 2026308 AMAQI
29th Jun 2026329 AMAQI
29th Jun 20266010 AMAQI
29th Jun 20264011 AMAQI
29th Jun 20263812 PMAQI
29th Jun 2026381 PMAQI
29th Jun 2026422 PMAQI
29th Jun 2026283 PMAQI
29th Jun 2026304 PMAQI
29th Jun 2026345 PMAQI
29th Jun 2026546 PMAQI
29th Jun 2026247 PMAQI
29th Jun 2026288 PMAQI
29th Jun 2026329 PMAQI
29th Jun 20263410 PMAQI
29th Jun 20263211 PMAQI
30th Jun 20263412 AMAQI
30th Jun 2026311 AMAQI
30th Jun 2026312 AMAQI
30th Jun 2026313 AMAQI
30th Jun 2026324 AMAQI

29°C26/33°C

30th Jun 2026335 AMAQI
30th Jun 2026316 AMAQI
30th Jun 2026327 AMAQI
30th Jun 2026328 AMAQI
30th Jun 2026319 AMAQI
30th Jun 20263210 AMAQI
30th Jun 20263111 AMAQI
30th Jun 20262712 PMAQI
30th Jun 2026301 PMAQI
30th Jun 2026292 PMAQI
30th Jun 2026303 PMAQI
30th Jun 2026284 PMAQI
30th Jun 2026285 PMAQI
30th Jun 2026286 PMAQI
30th Jun 2026277 PMAQI
30th Jun 2026318 PMAQI
30th Jun 2026329 PMAQI
30th Jun 20263210 PMAQI
30th Jun 20263011 PMAQI
1st Jul 20263612 AMAQI
1st Jul 2026281 AMAQI
1st Jul 2026282 AMAQI
1st Jul 2026283 AMAQI
1st Jul 2026304 AMAQI

26°C25/29°C

1st Jul 2026305 AMAQI
1st Jul 2026316 AMAQI
1st Jul 2026307 AMAQI
1st Jul 2026318 AMAQI
1st Jul 2026349 AMAQI
1st Jul 20263010 AMAQI
1st Jul 20262911 AMAQI
1st Jul 20263212 PMAQI
1st Jul 2026281 PMAQI
1st Jul 2026262 PMAQI
1st Jul 2026303 PMAQI
1st Jul 2026284 PMAQI
1st Jul 2026265 PMAQI
1st Jul 2026266 PMAQI
1st Jul 2026287 PMAQI
1st Jul 2026278 PMAQI
1st Jul 2026309 PMAQI
1st Jul 20262810 PMAQI
1st Jul 20263111 PMAQI
2nd Jul 20263012 AMAQI
2nd Jul 2026301 AMAQI
2nd Jul 2026322 AMAQI
2nd Jul 2026313 AMAQI
2nd Jul 2026274 AMAQI

26°C24/29°C

2nd Jul 2026285 AMAQI
2nd Jul 2026296 AMAQI
2nd Jul 2026287 AMAQI
2nd Jul 2026328 AMAQI
2nd Jul 2026279 AMAQI
2nd Jul 20262710 AMAQI
2nd Jul 20262411 AMAQI
2nd Jul 20262512 PMAQI
2nd Jul 2026261 PMAQI
2nd Jul 2026262 PMAQI
2nd Jul 2026283 PMAQI
2nd Jul 2026284 PMAQI
2nd Jul 2026285 PMAQI
2nd Jul 2026276 PMAQI
2nd Jul 2026287 PMAQI
2nd Jul 2026278 PMAQI
2nd Jul 2026299 PMAQI
2nd Jul 20263010 PMAQI
2nd Jul 20262911 PMAQI
3rd Jul 20262512 AMAQI
3rd Jul 2026291 AMAQI
3rd Jul 2026262 AMAQI
3rd Jul 2026283 AMAQI
3rd Jul 2026264 AMAQI

27°C25/32°C

3rd Jul 2026265 AMAQI
3rd Jul 2026286 AMAQI
3rd Jul 2026627 AMAQI
3rd Jul 2026488 AMAQI
3rd Jul 2026259 AMAQI
3rd Jul 20263110 AMAQI
3rd Jul 20262611 AMAQI
3rd Jul 20263012 PMAQI
3rd Jul 2026301 PMAQI
3rd Jul 2026282 PMAQI
3rd Jul 2026283 PMAQI
3rd Jul 2026564 PMAQI
3rd Jul 2026285 PMAQI
3rd Jul 2026386 PMAQI
3rd Jul 2026337 PMAQI
3rd Jul 2026528 PMAQI
3rd Jul 2026539 PMAQI
3rd Jul 20264210 PMAQI
3rd Jul 20263811 PMAQI
4th Jul 20264612 AMAQI
4th Jul 2026331 AMAQI
4th Jul 2026302 AMAQI
4th Jul 2026293 AMAQI
4th Jul 2026314 AMAQI

27°C24/33°C

4th Jul 2026285 AMAQI
4th Jul 2026326 AMAQI
4th Jul 2026407 AMAQI
4th Jul 2026318 AMAQI
4th Jul 2026429 AMAQI
4th Jul 20263210 AMAQI
4th Jul 20263311 AMAQI
4th Jul 20263212 PMAQI
4th Jul 2026301 PMAQI
4th Jul 2026282 PMAQI
4th Jul 2026303 PMAQI
4th Jul 2026264 PMAQI
4th Jul 2026265 PMAQI
4th Jul 2026286 PMAQI
4th Jul 2026297 PMAQI
4th Jul 2026288 PMAQI
4th Jul 2026289 PMAQI
4th Jul 20262810 PMAQI
4th Jul 20263211 PMAQI
5th Jul 20266012 AMAQI
5th Jul 2026381 AMAQI
5th Jul 2026282 AMAQI
5th Jul 2026313 AMAQI
5th Jul 2026264 AMAQI

27°C25/31°C

5th Jul 2026265 AMAQI
5th Jul 2026306 AMAQI
5th Jul 2026317 AMAQI
5th Jul 2026298 AMAQI
5th Jul 2026319 AMAQI
5th Jul 20263010 AMAQI
5th Jul 20263411 AMAQI
5th Jul 20264212 PMAQI
5th Jul 2026381 PMAQI
5th Jul 2026332 PMAQI
5th Jul 2026383 PMAQI
5th Jul 2026324 PMAQI
5th Jul 2026285 PMAQI
5th Jul 2026286 PMAQI
5th Jul 2026277 PMAQI
5th Jul 2026268 PMAQI
5th Jul 2026319 PMAQI
5th Jul 20263010 PMAQI
5th Jul 20263111 PMAQI
6th Jul 20262812 AMAQI
6th Jul 2026301 AMAQI
6th Jul 2026282 AMAQI
6th Jul 2026303 AMAQI
6th Jul 2026284 AMAQI

24°C23/25°C

6th Jul 2026305 AMAQI
6th Jul 2026286 AMAQI
6th Jul 2026247 AMAQI
6th Jul 2026398 AMAQI
6th Jul 2026419 AMAQI
6th Jul 20262610 AMAQI
6th Jul 20262211 AMAQI
6th Jul 20262612 PMAQI
6th Jul 2026271 PMAQI
6th Jul 2026302 PMAQI
6th Jul 2026243 PMAQI
6th Jul 2026234 PMAQI
6th Jul 2026245 PMAQI
6th Jul 2026126 PMAQI
6th Jul 2026147 PMAQI
6th Jul 2026148 PMAQI
6th Jul 2026219 PMAQI
6th Jul 20263210 PMAQI
6th Jul 20263011 PMAQI
7th Jul 20263512 AMAQI
7th Jul 2026311 AMAQI
7th Jul 2026322 AMAQI
7th Jul 2026343 AMAQI
7th Jul 2026364 AMAQI

24°C23/26°C

7th Jul 2026305 AMAQI
7th Jul 2026326 AMAQI
7th Jul 2026287 AMAQI
7th Jul 2026288 AMAQI
7th Jul 2026309 AMAQI
7th Jul 20263010 AMAQI
7th Jul 20262511 AMAQI
7th Jul 20263012 PMAQI
7th Jul 2026341 PMAQI
7th Jul 2026532 PMAQI
7th Jul 2026533 PMAQI
7th Jul 2026524 PMAQI
7th Jul 2026535 PMAQI
7th Jul 2026306 PMAQI
7th Jul 2026307 PMAQI
7th Jul 2026308 PMAQI
7th Jul 2026289 PMAQI
7th Jul 20263210 PMAQI
7th Jul 20263211 PMAQI
8th Jul 20263012 AMAQI
8th Jul 2026301 AMAQI
8th Jul 2026312 AMAQI
8th Jul 2026323 AMAQI
8th Jul 2026314 AMAQI

26°C23/30°C

8th Jul 2026275 AMAQI
8th Jul 2026326 AMAQI
8th Jul 2026307 AMAQI
8th Jul 2026288 AMAQI
8th Jul 2026389 AMAQI
8th Jul 20263410 AMAQI
8th Jul 20263311 AMAQI
8th Jul 20263012 PMAQI
8th Jul 2026301 PMAQI
8th Jul 2026342 PMAQI
8th Jul 2026413 PMAQI
8th Jul 2026514 PMAQI
8th Jul 2026245 PMAQI
8th Jul 2026256 PMAQI
8th Jul 2026317 PMAQI
8th Jul 2026308 PMAQI
8th Jul 2026329 PMAQI
8th Jul 20263210 PMAQI
8th Jul 20263411 PMAQI
9th Jul 20263212 AMAQI
9th Jul 2026341 AMAQI
9th Jul 2026302 AMAQI
9th Jul 2026323 AMAQI
9th Jul 2026334 AMAQI

25°C23/30°C

9th Jul 2026305 AMAQI
9th Jul 2026316 AMAQI
9th Jul 2026297 AMAQI
9th Jul 2026308 AMAQI
9th Jul 2026309 AMAQI
9th Jul 20262510 AMAQI
9th Jul 20262411 AMAQI
9th Jul 20262812 PMAQI
9th Jul 2026301 PMAQI
9th Jul 2026302 PMAQI
9th Jul 2026323 PMAQI
9th Jul 2026314 PMAQI
9th Jul 2026325 PMAQI
9th Jul 2026416 PMAQI
9th Jul 2026557 PMAQI
9th Jul 2026578 PMAQI
9th Jul 2026669 PMAQI
9th Jul 20265810 PMAQI
9th Jul 20264211 PMAQI
10th Jul 20265512 AMAQI
10th Jul 2026481 AMAQI
10th Jul 2026332 AMAQI
10th Jul 2026463 AMAQI
10th Jul 2026364 AMAQI

24°C22/29°C

10th Jul 2026345 AMAQI
10th Jul 2026426 AMAQI
10th Jul 2026547 AMAQI
10th Jul 2026518 AMAQI
10th Jul 2026409 AMAQI
10th Jul 20263810 AMAQI
10th Jul 20263311 AMAQI
10th Jul 20264012 PMAQI
10th Jul 2026281 PMAQI
10th Jul 2026282 PMAQI
10th Jul 2026323 PMAQI
10th Jul 2026324 PMAQI
10th Jul 2026355 PMAQI
10th Jul 2026336 PMAQI
10th Jul 2026377 PMAQI
10th Jul 2026348 PMAQI
10th Jul 2026219 PMAQI
10th Jul 20262310 PMAQI
10th Jul 20262311 PMAQI
11th Jul 20262512 AMAQI
11th Jul 2026321 AMAQI
11th Jul 2026332 AMAQI
11th Jul 2026373 AMAQI
11th Jul 2026344 AMAQI

25°C23/29°C

11th Jul 2026385 AMAQI
11th Jul 2026426 AMAQI
11th Jul 2026407 AMAQI
11th Jul 2026408 AMAQI
11th Jul 2026429 AMAQI
11th Jul 20263210 AMAQI
11th Jul 20264611 AMAQI
11th Jul 20264212 PMAQI
11th Jul 2026311 PMAQI
11th Jul 2026332 PMAQI
11th Jul 2026343 PMAQI
11th Jul 2026364 PMAQI
11th Jul 2026335 PMAQI
11th Jul 2026446 PMAQI
11th Jul 2026587 PMAQI
11th Jul 2026468 PMAQI
11th Jul 2026519 PMAQI
11th Jul 20265210 PMAQI
11th Jul 20265911 PMAQI
12th Jul 20266212 AMAQI
12th Jul 2026601 AMAQI
12th Jul 2026582 AMAQI
12th Jul 2026553 AMAQI
12th Jul 2026574 AMAQI

24°C23/26°C

12th Jul 2026585 AMAQI
12th Jul 2026606 AMAQI
12th Jul 2026647 AMAQI
12th Jul 2026598 AMAQI
12th Jul 2026559 AMAQI
12th Jul 20264210 AMAQI
12th Jul 20262611 AMAQI
12th Jul 20262612 PMAQI
12th Jul 2026251 PMAQI
12th Jul 2026282 PMAQI
12th Jul 2026323 PMAQI
12th Jul 2026304 PMAQI
12th Jul 2026325 PMAQI
12th Jul 2026316 PMAQI
12th Jul 2026357 PMAQI
12th Jul 2026338 PMAQI
12th Jul 2026369 PMAQI
12th Jul 20263410 PMAQI
12th Jul 20264411 PMAQI
13th Jul 20263312 AMAQI
13th Jul 2026341 AMAQI
13th Jul 2026402 AMAQI
13th Jul 2026463 AMAQI
13th Jul 2026384 AMAQI

25°C23/30°C

13th Jul 2026315 AMAQI
13th Jul 2026326 AMAQI
13th Jul 2026297 AMAQI
13th Jul 2026308 AMAQI
13th Jul 2026299 AMAQI
13th Jul 20263010 AMAQI
13th Jul 20262611 AMAQI
13th Jul 20262412 PMAQI
13th Jul 2026241 PMAQI
13th Jul 2026272 PMAQI
13th Jul 2026323 PMAQI
13th Jul 2026334 PMAQI
13th Jul 2026365 PMAQI
13th Jul 2026326 PMAQI
13th Jul 2026347 PMAQI
13th Jul 2026348 PMAQI
13th Jul 2026449 PMAQI
13th Jul 20263310 PMAQI
13th Jul 20264411 PMAQI
14th Jul 20264412 AMAQI
14th Jul 2026481 AMAQI
14th Jul 2026542 AMAQI
14th Jul 2026523 AMAQI
14th Jul 2026564 AMAQI

26°C24/29°C

14th Jul 2026695 AMAQI
14th Jul 2026626 AMAQI
14th Jul 2026597 AMAQI
14th Jul 2026608 AMAQI
14th Jul 2026649 AMAQI
14th Jul 20264810 AMAQI
14th Jul 20263611 AMAQI
14th Jul 20263112 PMAQI
14th Jul 2026311 PMAQI
14th Jul 2026312 PMAQI
14th Jul 2026363 PMAQI
14th Jul 2026314 PMAQI
14th Jul 2026335 PMAQI
14th Jul 2026326 PMAQI
14th Jul 2026447 PMAQI
14th Jul 2026508 PMAQI
14th Jul 2026389 PMAQI
14th Jul 20264210 PMAQI
14th Jul 20264711 PMAQI
15th Jul 20265512 AMAQI
15th Jul 2026481 AMAQI
15th Jul 2026192 AMAQI
15th Jul 2026363 AMAQI
15th Jul 2026244 AMAQI

27°C24/30°C

15th Jul 2026285 AMAQI
15th Jul 2026356 AMAQI
15th Jul 2026177 AMAQI
15th Jul 2026188 AMAQI
15th Jul 2026189 AMAQI
15th Jul 20262810 AMAQI
15th Jul 20262311 AMAQI
15th Jul 20262612 PMAQI
15th Jul 2026271 PMAQI
15th Jul 2026262 PMAQI
15th Jul 2026283 PMAQI
15th Jul 2026314 PMAQI
15th Jul 2026365 PMAQI
15th Jul 2026386 PMAQI
15th Jul 2026447 PMAQI
15th Jul 2026668 PMAQI
15th Jul 2026309 PMAQI
15th Jul 20266610 PMAQI
15th Jul 20265111 PMAQI
16th Jul 20265112 AMAQI
16th Jul 2026541 AMAQI
16th Jul 2026382 AMAQI
16th Jul 2026443 AMAQI
16th Jul 2026464 AMAQI

26°C24/30°C

16th Jul 2026425 AMAQI
5 AM
16th Jul 2026386 AMAQI
16th Jul 2026497 AMAQI
16th Jul 2026508 AMAQI
16th Jul 2026449 AMAQI
16th Jul 20263310 AMAQI
16th Jul 20263311 AMAQI
11 AM
16th Jul 20263312 PMAQI
16th Jul 2026421 PMAQI
16th Jul 2026362 PMAQI
16th Jul 2026443 PMAQI
16th Jul 2026444 PMAQI
16th Jul 2026425 PMAQI
16th Jul 2026426 PMAQI
6 PM
16th Jul 2026427 PMAQI
16th Jul 2026468 PMAQI
16th Jul 2026429 PMAQI
16th Jul 20265410 PMAQI
16th Jul 20265211 PMAQI
11 PM
4 AM

25°C24/27°C

Day time
Avg. Highest Time
7 AM - 8 AM

38AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
1 PM

30AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 7 AM to 8 AM (Avg. 38), while the lowest AQI was between 1 PM to 1 PM (Avg. 30).
Night time
Avg. Highest Time
12 AM

40AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
4 AM - 7 PM

33AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 12 AM (Avg. 40), while the lowest AQI was between 4 AM to 7 PM (Avg. 33).

2026 Days Vs Air Quality

Faculty of Engineering National University of Laos Purple Air Project, Vientiane, Viangchan, Laos

2026

29%

57

41%

79

25%

48

5%

10

Total number of days with different AQI categories in last 197 days in 2026 (168 days remaining)

Good
57 Days
Moderate
79 Days
Poor
48 Days
Unhealthy
10 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 29%

Health Risk Level:

Very high

In 2026, 29% of 197 days were within WHO’s safe air quality limits. The risk of health issues is Very high, including respiratory issues, heart disease, and stress, particularly affecting vulnerable groups.

Annual Air Quality Insights

Faculty of Engineering National University of Laos Purple Air Project, Vientiane, Viangchan, Laos

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
107AQI (US)
2nd January 2026
73AQI (US)
3rd January 2026
50AQI (US)
4th January 2026
62AQI (US)
5th January 2026
111AQI (US)
6th January 2026
61AQI (US)
7th January 2026
53AQI (US)
8th January 2026
70AQI (US)
9th January 2026
99AQI (US)
10th January 2026
117AQI (US)
11th January 2026
110AQI (US)
12th January 2026
144AQI (US)
13th January 2026
127AQI (US)
14th January 2026
125AQI (US)
15th January 2026
142AQI (US)
16th January 2026
134AQI (US)
17th January 2026
134AQI (US)
18th January 2026
129AQI (US)
19th January 2026
120AQI (US)
20th January 2026
118AQI (US)
21st January 2026
103AQI (US)
22nd January 2026
74AQI (US)
23rd January 2026
50AQI (US)
24th January 2026
78AQI (US)
25th January 2026
101AQI (US)
26th January 2026
108AQI (US)
27th January 2026
90AQI (US)
28th January 2026
84AQI (US)
29th January 2026
97AQI (US)
30th January 2026
118AQI (US)
31st January 2026
111AQI (US)
1st February 2026
80AQI (US)
2nd February 2026
71AQI (US)
3rd February 2026
58AQI (US)
4th February 2026
80AQI (US)
5th February 2026
100AQI (US)
6th February 2026
100AQI (US)
7th February 2026
111AQI (US)
8th February 2026
75AQI (US)
9th February 2026
25AQI (US)
10th February 2026
67AQI (US)
11th February 2026
78AQI (US)
12th February 2026
76AQI (US)
13th February 2026
89AQI (US)
14th February 2026
90AQI (US)
15th February 2026
94AQI (US)
16th February 2026
107AQI (US)
17th February 2026
81AQI (US)
18th February 2026
50AQI (US)
19th February 2026
32AQI (US)
20th February 2026
40AQI (US)
21st February 2026
83AQI (US)
22nd February 2026
131AQI (US)
23rd February 2026
126AQI (US)
24th February 2026
112AQI (US)
25th February 2026
66AQI (US)
26th February 2026
64AQI (US)
27th February 2026
70AQI (US)
28th February 2026
65AQI (US)
1st March 2026
81AQI (US)
2nd March 2026
92AQI (US)
3rd March 2026
111AQI (US)
4th March 2026
87AQI (US)
5th March 2026
58AQI (US)
6th March 2026
52AQI (US)
7th March 2026
50AQI (US)
8th March 2026
53AQI (US)
9th March 2026
76AQI (US)
10th March 2026
38AQI (US)
11th March 2026
88AQI (US)
12th March 2026
72AQI (US)
13th March 2026
96AQI (US)
14th March 2026
74AQI (US)
15th March 2026
61AQI (US)
16th March 2026
73AQI (US)
17th March 2026
83AQI (US)
18th March 2026
113AQI (US)
19th March 2026
116AQI (US)
20th March 2026
114AQI (US)
21st March 2026
107AQI (US)
22nd March 2026
118AQI (US)
23rd March 2026
104AQI (US)
24th March 2026
121AQI (US)
25th March 2026
111AQI (US)
26th March 2026
108AQI (US)
27th March 2026
142AQI (US)
28th March 2026
138AQI (US)
29th March 2026
119AQI (US)
30th March 2026
135AQI (US)
31st March 2026
144AQI (US)
1st April 2026
159AQI (US)
2nd April 2026
158AQI (US)
3rd April 2026
157AQI (US)
4th April 2026
159AQI (US)
5th April 2026
164AQI (US)
6th April 2026
164AQI (US)
7th April 2026
160AQI (US)
8th April 2026
153AQI (US)
9th April 2026
151AQI (US)
10th April 2026
146AQI (US)
11th April 2026
142AQI (US)
12th April 2026
146AQI (US)
13th April 2026
156AQI (US)
14th April 2026
149AQI (US)
15th April 2026
148AQI (US)
16th April 2026
149AQI (US)
17th April 2026
18th April 2026
128AQI (US)
19th April 2026
118AQI (US)
20th April 2026
100AQI (US)
21st April 2026
127AQI (US)
22nd April 2026
23rd April 2026
134AQI (US)
24th April 2026
81AQI (US)
25th April 2026
67AQI (US)
26th April 2026
74AQI (US)
27th April 2026
91AQI (US)
28th April 2026
87AQI (US)
29th April 2026
77AQI (US)
30th April 2026
64AQI (US)
1st May 2026
75AQI (US)
2nd May 2026
55AQI (US)
3rd May 2026
85AQI (US)
4th May 2026
61AQI (US)
5th May 2026
56AQI (US)
6th May 2026
61AQI (US)
7th May 2026
85AQI (US)
8th May 2026
68AQI (US)
9th May 2026
10th May 2026
58AQI (US)
11th May 2026
77AQI (US)
12th May 2026
80AQI (US)
13th May 2026
57AQI (US)
14th May 2026
52AQI (US)
15th May 2026
40AQI (US)
16th May 2026
86AQI (US)
17th May 2026
83AQI (US)
18th May 2026
74AQI (US)
19th May 2026
58AQI (US)
20th May 2026
71AQI (US)
21st May 2026
74AQI (US)
22nd May 2026
62AQI (US)
23rd May 2026
47AQI (US)
24th May 2026
54AQI (US)
25th May 2026
56AQI (US)
26th May 2026
45AQI (US)
27th May 2026
38AQI (US)
28th May 2026
57AQI (US)
29th May 2026
42AQI (US)
30th May 2026
45AQI (US)
31st May 2026
50AQI (US)
1st June 2026
71AQI (US)
2nd June 2026
70AQI (US)
3rd June 2026
75AQI (US)
4th June 2026
62AQI (US)
5th June 2026
40AQI (US)
6th June 2026
33AQI (US)
7th June 2026
28AQI (US)
8th June 2026
28AQI (US)
9th June 2026
22AQI (US)
10th June 2026
34AQI (US)
11th June 2026
34AQI (US)
12th June 2026
34AQI (US)
13th June 2026
40AQI (US)
14th June 2026
38AQI (US)
15th June 2026
24AQI (US)
16th June 2026
32AQI (US)
17th June 2026
36AQI (US)
18th June 2026
38AQI (US)
19th June 2026
33AQI (US)
20th June 2026
32AQI (US)
21st June 2026
27AQI (US)
22nd June 2026
31AQI (US)
23rd June 2026
40AQI (US)
24th June 2026
41AQI (US)
25th June 2026
26AQI (US)
26th June 2026
34AQI (US)
27th June 2026
32AQI (US)
28th June 2026
34AQI (US)
29th June 2026
37AQI (US)
30th June 2026
31AQI (US)
1st July 2026
29AQI (US)
2nd July 2026
28AQI (US)
3rd July 2026
35AQI (US)
4th July 2026
31AQI (US)
5th July 2026
32AQI (US)
6th July 2026
26AQI (US)
7th July 2026
34AQI (US)
8th July 2026
32AQI (US)
9th July 2026
36AQI (US)
10th July 2026
36AQI (US)
11th July 2026
40AQI (US)
12th July 2026
43AQI (US)
13th July 2026
33AQI (US)
14th July 2026
46AQI (US)
15th July 2026
34AQI (US)
16th July 2026
43AQI (US)
17th July 2026
18th July 2026
19th July 2026
20th July 2026
21st July 2026
22nd July 2026
23rd July 2026
24th July 2026
25th July 2026
26th July 2026
27th July 2026
28th July 2026
29th July 2026
30th July 2026
31st July 2026
1st August 2026
2nd August 2026
3rd August 2026
4th August 2026
5th August 2026
6th August 2026
7th August 2026
8th August 2026
9th August 2026
10th August 2026
11th August 2026
12th August 2026
13th August 2026
14th August 2026
15th August 2026
16th August 2026
17th August 2026
18th August 2026
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
30th September 2026
1st October 2026
2nd October 2026
3rd October 2026
4th October 2026
5th October 2026
6th October 2026
7th October 2026
8th October 2026
9th October 2026
10th October 2026
11th October 2026
12th October 2026
13th October 2026
14th October 2026
15th October 2026
16th October 2026
17th October 2026
18th October 2026
19th October 2026
20th October 2026
21st October 2026
22nd October 2026
23rd October 2026
24th October 2026
25th October 2026
26th October 2026
27th October 2026
28th October 2026
29th October 2026
30th October 2026
31st October 2026
1st November 2026
2nd November 2026
3rd November 2026
4th November 2026
5th November 2026
6th November 2026
7th November 2026
8th November 2026
9th November 2026
10th November 2026
11th November 2026
12th November 2026
13th November 2026
14th November 2026
15th November 2026
16th November 2026
17th November 2026
18th November 2026
19th November 2026
20th November 2026
21st November 2026
22nd November 2026
23rd November 2026
24th November 2026
25th November 2026
26th November 2026
27th November 2026
28th November 2026
29th November 2026
30th November 2026
1st December 2026
2nd December 2026
3rd December 2026
4th December 2026
5th December 2026
6th December 2026
7th December 2026
8th December 2026
9th December 2026
10th December 2026
11th December 2026
12th December 2026
13th December 2026
14th December 2026
15th December 2026
16th December 2026
17th December 2026
18th December 2026
19th December 2026
20th December 2026
21st December 2026
22nd December 2026
23rd December 2026
24th December 2026
25th December 2026
26th December 2026
27th December 2026
28th December 2026
29th December 2026
30th December 2026
31st December 2026

100AQI (US)

79AQI (US)

95AQI (US)

129AQI (US)

62AQI (US)

38AQI (US)

35AQI (US)

No. of days

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

202679AQI (US)

2
11
18
4
19
5
2
14
15
8
10
10
7
23
26
4
16
57
79
48
10

Highest AQI (US) recorded in

April

129AQI (US)

Lowest AQI (US) recorded in

July

35AQI (US)

202573AQI (US)

10
21
21
7
14
10
7
24
6
14
17
23
7
26
5
15
16
23
7
4
27
6
18
6
1
13
17
112
179
67
7

Highest AQI (US) recorded in

January

110AQI (US)

Lowest AQI (US) recorded in

September

43AQI (US)

202465AQI (US)

7
10
1
1
1
7
5
7
23
14
17
21
7
3
4
9
26
4
2
26
3
58
121
18
1

Highest AQI (US) recorded in

April

142AQI (US)

Lowest AQI (US) recorded in

September

39AQI (US)

2023157AQI (US)

1
6
17
5
17
8
1
4
13
4
2
1
1
2
4
2
3
9
20
2
6
12
34
49
18
3

Highest AQI (US) recorded in

January

232AQI (US)

Lowest AQI (US) recorded in

July

46AQI (US)

2022136AQI (US)

2
2
4
14
5
1
9
8
5
25
15

Highest AQI (US) recorded in

December

147AQI (US)

Lowest AQI (US) recorded in

November

127AQI (US)

Most & Least Polluted Years Over the Last 5 Years

Most Polluted Year Recorded
2023(Avg.)
157AQI (US)
Least Polluted Year Recorded
2024(Avg.)
65AQI (US)

Faculty of Engineering National University of Laos Purple Air Project's annual 2026 AQI (US) (79) shows an average percentage change of -15.4% (improved AQI (US)) compared to previous years: 2022 (136), 2023 (157), 2024 (65), 2025 (73).