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+
August Air Quality Analysis
Faculty of Engineering National University of Laos Purple Air Project, Vientiane, Viangchan, Laos
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
11th Aug 2024
62AQILowest AQI recorded on
27th Aug 2024
35AQISame Day Analysis (4th August ):
On this day, AQI across the 2 years varied significantly: 2025 ranks 1st highest AQI at 58 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 4th Aug - 5th Aug 2025
Faculty of Engineering National University of Laos Purple Air Project, Vientiane, Viangchan, Laos
AQI
Day
Night
.
5 AM4th Aug 2025
6 PM
4 AM5th Aug 2025
Day time
Avg. Highest Time
1PM4th Aug
62AQI
Avg. Lowest Time
4PM4th Aug
46AQI
Night time
Avg. Highest Time
9PM4th Aug
59AQI
Avg. Lowest Time
3AM5th Aug
56AQI
In the last 24 hours,
Faculty of Engineering National University of Laos Purple Air Project's AQI reached its highest point of 62 at 1 PM during the Day, while the lowest point, 46, was recorded at 4 PM during the Day between 4th Aug and 5th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Faculty of Engineering National University of Laos Purple Air Project, Vientiane, Viangchan, Laos
JulAug
06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th
Day
Night
6th Jul 2025555 AMAQI
6th Jul 2025556 AMAQI
6th Jul 2025467 AMAQI
6th Jul 2025348 AMAQI
6th Jul 2025389 AMAQI
6th Jul 20253210 AMAQI
6th Jul 20254111 AMAQI
6th Jul 20254412 PMAQI
6th Jul 2025411 PMAQI
6th Jul 2025352 PMAQI
6th Jul 2025433 PMAQI
6th Jul 2025404 PMAQI
6th Jul 2025435 PMAQI
6th Jul 2025436 PMAQI
6th Jul 2025467 PMAQI
6th Jul 2025508 PMAQI
6th Jul 2025529 PMAQI
6th Jul 20255110 PMAQI
6th Jul 20254211 PMAQI
7th Jul 20254812 AMAQI
7th Jul 2025541 AMAQI
7th Jul 2025532 AMAQI
7th Jul 2025533 AMAQI
7th Jul 2025534 AMAQI
25°C23/26°C
7th Jul 2025525 AMAQI
7th Jul 2025526 AMAQI
7th Jul 2025477 AMAQI
7th Jul 2025428 AMAQI
7th Jul 2025389 AMAQI
7th Jul 20253610 AMAQI
7th Jul 20254111 AMAQI
7th Jul 20253412 PMAQI
7th Jul 2025351 PMAQI
7th Jul 2025392 PMAQI
7th Jul 2025483 PMAQI
7th Jul 2025364 PMAQI
7th Jul 2025365 PMAQI
7th Jul 2025386 PMAQI
7th Jul 2025387 PMAQI
7th Jul 2025428 PMAQI
7th Jul 2025399 PMAQI
7th Jul 20253810 PMAQI
7th Jul 20254411 PMAQI
8th Jul 20255112 AMAQI
8th Jul 2025541 AMAQI
8th Jul 2025532 AMAQI
8th Jul 2025543 AMAQI
8th Jul 2025534 AMAQI
26°C23/30°C
8th Jul 2025535 AMAQI
8th Jul 2025536 AMAQI
8th Jul 2025367 AMAQI
8th Jul 2025428 AMAQI
8th Jul 2025649 AMAQI
8th Jul 20253810 AMAQI
8th Jul 20254511 AMAQI
8th Jul 20253912 PMAQI
8th Jul 2025431 PMAQI
8th Jul 2025422 PMAQI
8th Jul 2025453 PMAQI
8th Jul 2025464 PMAQI
8th Jul 2025485 PMAQI
8th Jul 2025436 PMAQI
8th Jul 2025537 PMAQI
8th Jul 2025528 PMAQI
8th Jul 2025529 PMAQI
8th Jul 20254910 PMAQI
8th Jul 20255211 PMAQI
9th Jul 20255212 AMAQI
9th Jul 2025521 AMAQI
9th Jul 2025542 AMAQI
9th Jul 2025533 AMAQI
9th Jul 2025534 AMAQI
26°C24/29°C
9th Jul 2025545 AMAQI
9th Jul 2025546 AMAQI
9th Jul 2025447 AMAQI
9th Jul 2025438 AMAQI
9th Jul 2025449 AMAQI
9th Jul 20254810 AMAQI
9th Jul 20254411 AMAQI
9th Jul 20253912 PMAQI
9th Jul 2025401 PMAQI
9th Jul 2025452 PMAQI
9th Jul 2025523 PMAQI
9th Jul 2025524 PMAQI
9th Jul 2025485 PMAQI
9th Jul 2025506 PMAQI
9th Jul 2025527 PMAQI
9th Jul 2025518 PMAQI
9th Jul 2025489 PMAQI
9th Jul 20255210 PMAQI
9th Jul 20255211 PMAQI
10th Jul 20255412 AMAQI
10th Jul 2025551 AMAQI
10th Jul 2025542 AMAQI
10th Jul 2025553 AMAQI
10th Jul 2025544 AMAQI
27°C24/32°C
10th Jul 2025545 AMAQI
10th Jul 2025556 AMAQI
10th Jul 2025517 AMAQI
10th Jul 2025468 AMAQI
10th Jul 2025489 AMAQI
10th Jul 20254810 AMAQI
10th Jul 20254811 AMAQI
10th Jul 20255312 PMAQI
10th Jul 2025581 PMAQI
10th Jul 2025642 PMAQI
10th Jul 2025573 PMAQI
10th Jul 2025564 PMAQI
10th Jul 2025545 PMAQI
10th Jul 2025526 PMAQI
10th Jul 2025537 PMAQI
10th Jul 2025548 PMAQI
10th Jul 2025549 PMAQI
10th Jul 20255510 PMAQI
10th Jul 20254611 PMAQI
11th Jul 20253912 AMAQI
11th Jul 2025541 AMAQI
11th Jul 2025542 AMAQI
11th Jul 2025543 AMAQI
11th Jul 2025554 AMAQI
27°C25/30°C
11th Jul 2025555 AMAQI
11th Jul 2025566 AMAQI
11th Jul 2025407 AMAQI
11th Jul 2025408 AMAQI
11th Jul 2025429 AMAQI
11th Jul 20253810 AMAQI
11th Jul 20254511 AMAQI
11th Jul 20254312 PMAQI
11th Jul 2025541 PMAQI
11th Jul 2025502 PMAQI
11th Jul 2025463 PMAQI
11th Jul 2025414 PMAQI
11th Jul 2025485 PMAQI
11th Jul 2025486 PMAQI
11th Jul 2025507 PMAQI
11th Jul 2025508 PMAQI
11th Jul 2025539 PMAQI
11th Jul 20255310 PMAQI
11th Jul 20255311 PMAQI
12th Jul 20255412 AMAQI
12th Jul 2025551 AMAQI
12th Jul 2025552 AMAQI
12th Jul 2025553 AMAQI
12th Jul 2025554 AMAQI
24°C23/26°C
12th Jul 2025555 AMAQI
12th Jul 2025556 AMAQI
12th Jul 2025467 AMAQI
12th Jul 2025468 AMAQI
12th Jul 2025429 AMAQI
12th Jul 20254010 AMAQI
12th Jul 20254211 AMAQI
12th Jul 20255412 PMAQI
12th Jul 2025581 PMAQI
12th Jul 2025562 PMAQI
12th Jul 2025493 PMAQI
12th Jul 2025424 PMAQI
12th Jul 2025505 PMAQI
12th Jul 2025526 PMAQI
12th Jul 2025497 PMAQI
12th Jul 2025508 PMAQI
12th Jul 2025509 PMAQI
12th Jul 20255310 PMAQI
12th Jul 20255311 PMAQI
13th Jul 20255212 AMAQI
13th Jul 2025561 AMAQI
13th Jul 2025562 AMAQI
13th Jul 2025553 AMAQI
13th Jul 2025554 AMAQI
25°C23/28°C
13th Jul 2025555 AMAQI
13th Jul 2025556 AMAQI
13th Jul 2025467 AMAQI
13th Jul 2025368 AMAQI
13th Jul 2025339 AMAQI
13th Jul 20253210 AMAQI
13th Jul 20254611 AMAQI
13th Jul 20255312 PMAQI
13th Jul 2025471 PMAQI
13th Jul 2025442 PMAQI
13th Jul 2025423 PMAQI
13th Jul 2025364 PMAQI
13th Jul 2025395 PMAQI
13th Jul 2025506 PMAQI
13th Jul 2025407 PMAQI
13th Jul 2025408 PMAQI
13th Jul 2025419 PMAQI
13th Jul 20255110 PMAQI
13th Jul 20255411 PMAQI
14th Jul 20255212 AMAQI
14th Jul 2025561 AMAQI
14th Jul 2025552 AMAQI
14th Jul 2025543 AMAQI
14th Jul 2025554 AMAQI
27°C24/32°C
14th Jul 2025555 AMAQI
14th Jul 2025556 AMAQI
14th Jul 2025487 AMAQI
14th Jul 2025428 AMAQI
14th Jul 2025399 AMAQI
14th Jul 20254910 AMAQI
14th Jul 20254711 AMAQI
14th Jul 20254012 PMAQI
14th Jul 2025461 PMAQI
14th Jul 2025472 PMAQI
14th Jul 2025483 PMAQI
14th Jul 2025434 PMAQI
14th Jul 2025475 PMAQI
14th Jul 2025476 PMAQI
14th Jul 2025517 PMAQI
14th Jul 2025548 PMAQI
14th Jul 2025549 PMAQI
14th Jul 20255210 PMAQI
14th Jul 20255311 PMAQI
15th Jul 20255312 AMAQI
15th Jul 2025551 AMAQI
15th Jul 2025562 AMAQI
15th Jul 2025563 AMAQI
15th Jul 2025564 AMAQI
27°C25/31°C
15th Jul 2025565 AMAQI
15th Jul 2025566 AMAQI
15th Jul 2025587 AMAQI
15th Jul 2025548 AMAQI
15th Jul 2025549 AMAQI
15th Jul 20255410 AMAQI
15th Jul 20255311 AMAQI
15th Jul 20255012 PMAQI
15th Jul 2025511 PMAQI
15th Jul 2025532 PMAQI
15th Jul 2025523 PMAQI
15th Jul 2025534 PMAQI
15th Jul 2025535 PMAQI
15th Jul 2025486 PMAQI
15th Jul 2025407 PMAQI
15th Jul 2025498 PMAQI
15th Jul 2025489 PMAQI
15th Jul 20254310 PMAQI
15th Jul 20254011 PMAQI
16th Jul 20254912 AMAQI
16th Jul 2025561 AMAQI
16th Jul 2025562 AMAQI
16th Jul 2025563 AMAQI
16th Jul 2025564 AMAQI
27°C25/30°C
16th Jul 2025565 AMAQI
16th Jul 2025566 AMAQI
16th Jul 2025317 AMAQI
16th Jul 2025308 AMAQI
16th Jul 2025349 AMAQI
16th Jul 20253910 AMAQI
16th Jul 20254111 AMAQI
16th Jul 20254112 PMAQI
16th Jul 2025371 PMAQI
16th Jul 2025302 PMAQI
16th Jul 2025343 PMAQI
16th Jul 2025434 PMAQI
16th Jul 2025425 PMAQI
16th Jul 2025326 PMAQI
16th Jul 2025367 PMAQI
16th Jul 2025438 PMAQI
16th Jul 2025449 PMAQI
16th Jul 20255010 PMAQI
16th Jul 20255211 PMAQI
17th Jul 20255212 AMAQI
17th Jul 2025551 AMAQI
17th Jul 2025552 AMAQI
17th Jul 2025553 AMAQI
17th Jul 2025544 AMAQI
25°C24/28°C
17th Jul 2025545 AMAQI
17th Jul 2025546 AMAQI
17th Jul 2025487 AMAQI
17th Jul 2025428 AMAQI
17th Jul 2025469 AMAQI
17th Jul 20254410 AMAQI
17th Jul 20255111 AMAQI
17th Jul 20254812 PMAQI
17th Jul 2025431 PMAQI
17th Jul 2025422 PMAQI
17th Jul 2025443 PMAQI
17th Jul 2025364 PMAQI
17th Jul 2025295 PMAQI
17th Jul 2025286 PMAQI
17th Jul 2025437 PMAQI
17th Jul 2025448 PMAQI
17th Jul 2025489 PMAQI
17th Jul 20254410 PMAQI
17th Jul 20254711 PMAQI
18th Jul 20254612 AMAQI
18th Jul 2025541 AMAQI
18th Jul 2025542 AMAQI
18th Jul 2025533 AMAQI
18th Jul 2025544 AMAQI
26°C24/30°C
18th Jul 2025545 AMAQI
18th Jul 2025546 AMAQI
18th Jul 2025347 AMAQI
18th Jul 2025338 AMAQI
18th Jul 2025349 AMAQI
18th Jul 20252710 AMAQI
18th Jul 20253711 AMAQI
18th Jul 20253612 PMAQI
18th Jul 2025371 PMAQI
18th Jul 2025352 PMAQI
18th Jul 2025383 PMAQI
18th Jul 2025374 PMAQI
18th Jul 2025385 PMAQI
18th Jul 2025396 PMAQI
18th Jul 2025427 PMAQI
18th Jul 2025418 PMAQI
18th Jul 2025389 PMAQI
18th Jul 20253510 PMAQI
18th Jul 20253711 PMAQI
19th Jul 20254212 AMAQI
19th Jul 2025511 AMAQI
19th Jul 2025512 AMAQI
19th Jul 2025523 AMAQI
19th Jul 2025524 AMAQI
27°C23/32°C
19th Jul 2025535 AMAQI
19th Jul 2025536 AMAQI
19th Jul 2025497 AMAQI
19th Jul 2025408 AMAQI
19th Jul 2025299 AMAQI
19th Jul 20253610 AMAQI
19th Jul 20253711 AMAQI
19th Jul 20253712 PMAQI
19th Jul 2025381 PMAQI
19th Jul 2025362 PMAQI
19th Jul 2025383 PMAQI
19th Jul 2025364 PMAQI
19th Jul 2025385 PMAQI
19th Jul 2025386 PMAQI
19th Jul 2025397 PMAQI
19th Jul 2025368 PMAQI
19th Jul 2025349 PMAQI
19th Jul 20253010 PMAQI
19th Jul 20252911 PMAQI
20th Jul 20253412 AMAQI
20th Jul 2025461 AMAQI
20th Jul 2025492 AMAQI
20th Jul 2025523 AMAQI
20th Jul 2025524 AMAQI
27°C24/32°C
20th Jul 2025525 AMAQI
20th Jul 2025526 AMAQI
20th Jul 2025417 AMAQI
20th Jul 2025348 AMAQI
20th Jul 2025339 AMAQI
20th Jul 20252910 AMAQI
20th Jul 20253911 AMAQI
20th Jul 20254012 PMAQI
20th Jul 2025381 PMAQI
20th Jul 2025342 PMAQI
20th Jul 2025363 PMAQI
20th Jul 2025364 PMAQI
20th Jul 2025335 PMAQI
20th Jul 2025396 PMAQI
20th Jul 2025357 PMAQI
20th Jul 2025328 PMAQI
20th Jul 2025409 PMAQI
20th Jul 20253710 PMAQI
20th Jul 20253511 PMAQI
21st Jul 20253812 AMAQI
21st Jul 2025451 AMAQI
21st Jul 2025472 AMAQI
21st Jul 2025503 AMAQI
21st Jul 2025504 AMAQI
27°C24/31°C
21st Jul 2025485 AMAQI
21st Jul 2025496 AMAQI
21st Jul 2025327 AMAQI
21st Jul 2025318 AMAQI
21st Jul 2025349 AMAQI
21st Jul 20253510 AMAQI
21st Jul 20253511 AMAQI
21st Jul 20253612 PMAQI
21st Jul 2025361 PMAQI
21st Jul 2025342 PMAQI
21st Jul 2025363 PMAQI
21st Jul 2025344 PMAQI
21st Jul 2025425 PMAQI
21st Jul 2025396 PMAQI
21st Jul 2025467 PMAQI
21st Jul 2025408 PMAQI
21st Jul 2025409 PMAQI
21st Jul 20253610 PMAQI
21st Jul 20253211 PMAQI
22nd Jul 20253712 AMAQI
22nd Jul 2025471 AMAQI
22nd Jul 2025512 AMAQI
22nd Jul 2025493 AMAQI
22nd Jul 2025504 AMAQI
26°C24/29°C
22nd Jul 2025485 AMAQI
22nd Jul 2025486 AMAQI
22nd Jul 2025307 AMAQI
22nd Jul 2025268 AMAQI
22nd Jul 2025259 AMAQI
22nd Jul 20252510 AMAQI
22nd Jul 20252611 AMAQI
22nd Jul 20252812 PMAQI
22nd Jul 2025261 PMAQI
22nd Jul 2025272 PMAQI
22nd Jul 2025323 PMAQI
22nd Jul 2025314 PMAQI
22nd Jul 2025325 PMAQI
22nd Jul 2025376 PMAQI
22nd Jul 2025407 PMAQI
22nd Jul 2025418 PMAQI
22nd Jul 2025429 PMAQI
22nd Jul 20254410 PMAQI
22nd Jul 20254311 PMAQI
23rd Jul 20254212 AMAQI
23rd Jul 2025451 AMAQI
23rd Jul 2025482 AMAQI
23rd Jul 2025473 AMAQI
23rd Jul 2025464 AMAQI
24°C23/24°C
23rd Jul 2025465 AMAQI
23rd Jul 2025466 AMAQI
23rd Jul 2025287 AMAQI
23rd Jul 2025228 AMAQI
23rd Jul 2025289 AMAQI
23rd Jul 20252210 AMAQI
23rd Jul 20252811 AMAQI
23rd Jul 20252812 PMAQI
23rd Jul 2025281 PMAQI
23rd Jul 2025302 PMAQI
23rd Jul 2025293 PMAQI
23rd Jul 2025264 PMAQI
23rd Jul 2025275 PMAQI
23rd Jul 2025316 PMAQI
23rd Jul 2025397 PMAQI
23rd Jul 2025408 PMAQI
23rd Jul 2025409 PMAQI
23rd Jul 20254010 PMAQI
23rd Jul 20254211 PMAQI
24th Jul 20254412 AMAQI
24th Jul 2025461 AMAQI
24th Jul 2025472 AMAQI
24th Jul 2025463 AMAQI
24th Jul 2025464 AMAQI
24°C23/26°C
24th Jul 2025445 AMAQI
24th Jul 2025456 AMAQI
24th Jul 2025307 AMAQI
24th Jul 2025388 AMAQI
24th Jul 2025289 AMAQI
24th Jul 20252210 AMAQI
24th Jul 20252811 AMAQI
24th Jul 20253212 PMAQI
24th Jul 2025431 PMAQI
24th Jul 2025542 PMAQI
24th Jul 2025423 PMAQI
24th Jul 2025374 PMAQI
24th Jul 2025405 PMAQI
24th Jul 2025386 PMAQI
24th Jul 2025427 PMAQI
24th Jul 2025428 PMAQI
24th Jul 2025429 PMAQI
24th Jul 20254210 PMAQI
24th Jul 20254411 PMAQI
25th Jul 20254612 AMAQI
25th Jul 2025501 AMAQI
25th Jul 2025472 AMAQI
25th Jul 2025483 AMAQI
25th Jul 2025474 AMAQI
25°C24/27°C
25th Jul 2025465 AMAQI
25th Jul 2025466 AMAQI
25th Jul 2025587 AMAQI
25th Jul 2025568 AMAQI
25th Jul 2025479 AMAQI
25th Jul 20253610 AMAQI
25th Jul 20254111 AMAQI
25th Jul 20254312 PMAQI
25th Jul 2025461 PMAQI
25th Jul 2025442 PMAQI
25th Jul 2025473 PMAQI
25th Jul 2025454 PMAQI
25th Jul 2025455 PMAQI
25th Jul 2025426 PMAQI
25th Jul 2025457 PMAQI
25th Jul 2025458 PMAQI
25th Jul 2025489 PMAQI
25th Jul 20255010 PMAQI
25th Jul 20254911 PMAQI
26th Jul 20255012 AMAQI
26th Jul 2025501 AMAQI
26th Jul 2025512 AMAQI
26th Jul 2025523 AMAQI
26th Jul 2025514 AMAQI
25°C23/27°C
26th Jul 2025515 AMAQI
26th Jul 2025526 AMAQI
26th Jul 2025517 AMAQI
26th Jul 2025528 AMAQI
26th Jul 2025519 AMAQI
26th Jul 20255110 AMAQI
26th Jul 20255211 AMAQI
26th Jul 20255312 PMAQI
26th Jul 2025561 PMAQI
26th Jul 2025552 PMAQI
26th Jul 2025493 PMAQI
26th Jul 2025504 PMAQI
26th Jul 2025445 PMAQI
26th Jul 2025456 PMAQI
26th Jul 2025497 PMAQI
26th Jul 2025478 PMAQI
26th Jul 2025479 PMAQI
26th Jul 20255210 PMAQI
26th Jul 20255111 PMAQI
27th Jul 20255212 AMAQI
27th Jul 2025521 AMAQI
27th Jul 2025532 AMAQI
27th Jul 2025543 AMAQI
27th Jul 2025544 AMAQI
25°C24/27°C
27th Jul 2025535 AMAQI
27th Jul 2025536 AMAQI
27th Jul 2025477 AMAQI
27th Jul 2025328 AMAQI
27th Jul 2025349 AMAQI
27th Jul 20253810 AMAQI
27th Jul 20253611 AMAQI
27th Jul 20253312 PMAQI
27th Jul 2025331 PMAQI
27th Jul 2025332 PMAQI
27th Jul 2025393 PMAQI
27th Jul 2025414 PMAQI
27th Jul 2025415 PMAQI
27th Jul 2025416 PMAQI
27th Jul 2025487 PMAQI
27th Jul 2025478 PMAQI
27th Jul 2025509 PMAQI
27th Jul 20255010 PMAQI
27th Jul 20254811 PMAQI
28th Jul 20254812 AMAQI
28th Jul 2025501 AMAQI
28th Jul 2025522 AMAQI
28th Jul 2025513 AMAQI
28th Jul 2025524 AMAQI
24°C23/27°C
28th Jul 2025515 AMAQI
28th Jul 2025516 AMAQI
28th Jul 2025407 AMAQI
28th Jul 2025388 AMAQI
28th Jul 2025449 AMAQI
28th Jul 20253610 AMAQI
28th Jul 20253611 AMAQI
28th Jul 20253612 PMAQI
28th Jul 2025351 PMAQI
28th Jul 2025362 PMAQI
28th Jul 2025383 PMAQI
28th Jul 2025394 PMAQI
28th Jul 2025405 PMAQI
28th Jul 2025426 PMAQI
28th Jul 2025487 PMAQI
28th Jul 2025508 PMAQI
28th Jul 2025519 PMAQI
28th Jul 20255110 PMAQI
28th Jul 20254811 PMAQI
29th Jul 20255012 AMAQI
29th Jul 2025501 AMAQI
29th Jul 2025512 AMAQI
29th Jul 2025503 AMAQI
29th Jul 2025484 AMAQI
25°C24/28°C
29th Jul 2025505 AMAQI
29th Jul 2025496 AMAQI
29th Jul 2025427 AMAQI
29th Jul 2025418 AMAQI
29th Jul 2025349 AMAQI
29th Jul 20253010 AMAQI
29th Jul 20253711 AMAQI
29th Jul 20253712 PMAQI
29th Jul 2025421 PMAQI
29th Jul 2025402 PMAQI
29th Jul 2025343 PMAQI
29th Jul 2025364 PMAQI
29th Jul 2025345 PMAQI
29th Jul 2025386 PMAQI
29th Jul 2025467 PMAQI
29th Jul 2025498 PMAQI
29th Jul 2025509 PMAQI
29th Jul 20254810 PMAQI
29th Jul 20254811 PMAQI
30th Jul 20254912 AMAQI
30th Jul 2025491 AMAQI
30th Jul 2025522 AMAQI
30th Jul 2025513 AMAQI
30th Jul 2025514 AMAQI
27°C24/31°C
30th Jul 2025515 AMAQI
30th Jul 2025506 AMAQI
30th Jul 2025417 AMAQI
30th Jul 2025468 AMAQI
30th Jul 2025439 AMAQI
30th Jul 20254110 AMAQI
30th Jul 20254111 AMAQI
30th Jul 20254012 PMAQI
30th Jul 2025421 PMAQI
30th Jul 2025402 PMAQI
30th Jul 2025403 PMAQI
30th Jul 2025434 PMAQI
30th Jul 2025395 PMAQI
30th Jul 2025426 PMAQI
30th Jul 2025527 PMAQI
30th Jul 2025538 PMAQI
30th Jul 2025529 PMAQI
30th Jul 20255110 PMAQI
30th Jul 20255211 PMAQI
31st Jul 20255212 AMAQI
31st Jul 2025521 AMAQI
31st Jul 2025522 AMAQI
31st Jul 2025523 AMAQI
31st Jul 2025524 AMAQI
25°C24/26°C
31st Jul 2025525 AMAQI
31st Jul 2025526 AMAQI
31st Jul 2025527 AMAQI
31st Jul 2025528 AMAQI
31st Jul 2025529 AMAQI
31st Jul 20255210 AMAQI
31st Jul 20255311 AMAQI
31st Jul 20255012 PMAQI
31st Jul 2025491 PMAQI
31st Jul 2025522 PMAQI
31st Jul 2025513 PMAQI
31st Jul 2025494 PMAQI
31st Jul 2025535 PMAQI
31st Jul 2025526 PMAQI
31st Jul 2025577 PMAQI
31st Jul 2025578 PMAQI
31st Jul 2025619 PMAQI
31st Jul 20255810 PMAQI
31st Jul 20255911 PMAQI
1st Aug 20255812 AMAQI
1st Aug 2025581 AMAQI
1st Aug 2025552 AMAQI
1st Aug 2025553 AMAQI
1st Aug 2025544 AMAQI
27°C24/30°C
1st Aug 2025565 AMAQI
1st Aug 2025556 AMAQI
1st Aug 2025617 AMAQI
1st Aug 2025598 AMAQI
1st Aug 2025589 AMAQI
1st Aug 20255610 AMAQI
1st Aug 20255911 AMAQI
1st Aug 20255912 PMAQI
1st Aug 2025561 PMAQI
1st Aug 2025552 PMAQI
1st Aug 2025563 PMAQI
1st Aug 2025574 PMAQI
1st Aug 2025555 PMAQI
1st Aug 2025566 PMAQI
1st Aug 2025607 PMAQI
1st Aug 2025628 PMAQI
1st Aug 2025609 PMAQI
1st Aug 20255910 PMAQI
1st Aug 20256011 PMAQI
2nd Aug 20255912 AMAQI
2nd Aug 2025571 AMAQI
2nd Aug 2025572 AMAQI
2nd Aug 2025573 AMAQI
2nd Aug 2025564 AMAQI
27°C25/32°C
2nd Aug 2025565 AMAQI
2nd Aug 2025576 AMAQI
2nd Aug 2025547 AMAQI
2nd Aug 2025568 AMAQI
2nd Aug 2025569 AMAQI
2nd Aug 20255410 AMAQI
2nd Aug 20255411 AMAQI
2nd Aug 20255312 PMAQI
2nd Aug 2025521 PMAQI
2nd Aug 2025542 PMAQI
2nd Aug 2025543 PMAQI
2nd Aug 2025544 PMAQI
2nd Aug 2025485 PMAQI
2nd Aug 2025566 PMAQI
2nd Aug 2025577 PMAQI
2nd Aug 2025588 PMAQI
2nd Aug 2025589 PMAQI
2nd Aug 20255910 PMAQI
2nd Aug 20255911 PMAQI
3rd Aug 20255812 AMAQI
3rd Aug 2025601 AMAQI
3rd Aug 2025572 AMAQI
3rd Aug 2025573 AMAQI
3rd Aug 2025584 AMAQI
28°C24/33°C
3rd Aug 2025575 AMAQI
3rd Aug 2025576 AMAQI
3rd Aug 2025587 AMAQI
3rd Aug 2025608 AMAQI
3rd Aug 2025789 AMAQI
3rd Aug 20257310 AMAQI
3rd Aug 20256711 AMAQI
3rd Aug 20255712 PMAQI
3rd Aug 2025561 PMAQI
3rd Aug 2025482 PMAQI
3rd Aug 2025503 PMAQI
3rd Aug 2025524 PMAQI
3rd Aug 2025525 PMAQI
3rd Aug 2025536 PMAQI
3rd Aug 2025567 PMAQI
3rd Aug 2025598 PMAQI
3rd Aug 2025589 PMAQI
3rd Aug 20255910 PMAQI
3rd Aug 20255811 PMAQI
4th Aug 20255812 AMAQI
4th Aug 2025571 AMAQI
4th Aug 2025572 AMAQI
4th Aug 2025583 AMAQI
4th Aug 2025574 AMAQI
28°C24/33°C
4th Aug 2025575 AMAQI
4th Aug 2025576 AMAQI
4th Aug 2025587 AMAQI
4th Aug 2025618 AMAQI
4th Aug 2025549 AMAQI
4th Aug 20256010 AMAQI
4th Aug 20256011 AMAQI
4th Aug 20255412 PMAQI
4th Aug 2025621 PMAQI
4th Aug 2025552 PMAQI
4th Aug 2025523 PMAQI
4th Aug 2025464 PMAQI
4th Aug 2025575 PMAQI
4th Aug 2025556 PMAQI
4th Aug 2025587 PMAQI
4th Aug 2025588 PMAQI
4th Aug 2025599 PMAQI
4th Aug 20255810 PMAQI
4th Aug 20255811 PMAQI
5th Aug 20255612 AMAQI
5th Aug 2025571 AMAQI
5th Aug 2025572 AMAQI
5th Aug 2025563 AMAQI
5th Aug 2025584 AMAQI
29°C24/35°C
5th Aug 2025585 AMAQI
5 AM5th Aug 2025566 AMAQI
5th Aug 2025617 AMAQI
5th Aug 2025618 AMAQI
5th Aug 2025629 AMAQI
5th Aug 20255810 AMAQI
5th Aug 20257511 AMAQI
11 AM5th Aug 20255712 PMAQI
5th Aug 2025491 PMAQI
5th Aug 2025532 PMAQI
5th Aug 2025503 PMAQI
5th Aug 2025504 PMAQI
6 PM
11 PM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 6 AM
53AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
7 AM - 10 AM
43AQI
4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 6 AM (Avg. 53), while the lowest AQI was between 7 AM to 10 AM (Avg. 43).
Night time
Avg. Highest Time
1 AM - 4 AM
53AQI
4 hours / Day
120 hours / Month
Avg. Lowest Time
7 PM - 11 PM
48AQI
5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 AM to 4 AM (Avg. 53), while the lowest AQI was between 7 PM to 11 PM (Avg. 48).
2025 Days Vs Air Quality
Faculty of Engineering National University of Laos Purple Air Project, Vientiane, Viangchan, Laos
2025
29%
63
47%
102
20%
44
3%
7
Total number of days with different AQI categories in last 217 days in 2025 (148 days remaining)
Good
63 DaysModerate
102 DaysPoor
44 DaysUnhealthy
7 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 29%
Health Risk Level:
Very high
In 2025, 29% of 217 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 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 January 2025
87AQI
87AQI
2nd January 2025
86AQI
86AQI
3rd January 2025
89AQI
89AQI
4th January 2025
108AQI
108AQI
5th January 2025
111AQI
111AQI
6th January 2025
124AQI
124AQI
7th January 2025
131AQI
131AQI
8th January 2025
122AQI
122AQI
9th January 2025
118AQI
118AQI
10th January 2025
89AQI
89AQI
11th January 2025
90AQI
90AQI
12th January 2025
101AQI
101AQI
13th January 2025
109AQI
109AQI
14th January 2025
122AQI
122AQI
15th January 2025
102AQI
102AQI
16th January 2025
91AQI
91AQI
17th January 2025
109AQI
109AQI
18th January 2025
117AQI
117AQI
19th January 2025
117AQI
117AQI
20th January 2025
126AQI
126AQI
21st January 2025
123AQI
123AQI
22nd January 2025
135AQI
135AQI
23rd January 2025
139AQI
139AQI
24th January 2025
142AQI
142AQI
25th January 2025
141AQI
141AQI
26th January 2025
100AQI
100AQI
27th January 2025
85AQI
85AQI
28th January 2025
87AQI
87AQI
29th January 2025
98AQI
98AQI
30th January 2025
103AQI
103AQI
31st January 2025
119AQI
119AQI
1st February 2025
122AQI
122AQI
2nd February 2025
130AQI
130AQI
3rd February 2025
110AQI
110AQI
4th February 2025
86AQI
86AQI
5th February 2025
91AQI
91AQI
6th February 2025
104AQI
104AQI
7th February 2025
92AQI
92AQI
8th February 2025
74AQI
74AQI
9th February 2025
77AQI
77AQI
10th February 2025
81AQI
81AQI
11th February 2025
88AQI
88AQI
12th February 2025
110AQI
110AQI
13th February 2025
95AQI
95AQI
14th February 2025
93AQI
93AQI
15th February 2025
101AQI
101AQI
16th February 2025
117AQI
117AQI
17th February 2025
96AQI
96AQI
18th February 2025
93AQI
93AQI
19th February 2025
85AQI
85AQI
20th February 2025
97AQI
97AQI
21st February 2025
84AQI
84AQI
22nd February 2025
83AQI
83AQI
23rd February 2025
68AQI
68AQI
24th February 2025
66AQI
66AQI
25th February 2025
60AQI
60AQI
26th February 2025
55AQI
55AQI
27th February 2025
70AQI
70AQI
28th February 2025
84AQI
84AQI
1st March 2025
80AQI
80AQI
2nd March 2025
84AQI
84AQI
3rd March 2025
101AQI
101AQI
4th March 2025
123AQI
123AQI
5th March 2025
114AQI
114AQI
6th March 2025
112AQI
112AQI
7th March 2025
76AQI
76AQI
8th March 2025
75AQI
75AQI
9th March 2025
83AQI
83AQI
10th March 2025
70AQI
70AQI
11th March 2025
86AQI
86AQI
12th March 2025
98AQI
98AQI
13th March 2025
77AQI
77AQI
14th March 2025
86AQI
86AQI
15th March 2025
102AQI
102AQI
16th March 2025
84AQI
84AQI
17th March 2025
80AQI
80AQI
18th March 2025
81AQI
81AQI
19th March 2025
100AQI
100AQI
20th March 2025
103AQI
103AQI
21st March 2025
126AQI
126AQI
22nd March 2025
136AQI
136AQI
23rd March 2025
152AQI
152AQI
24th March 2025
157AQI
157AQI
25th March 2025
162AQI
162AQI
26th March 2025
159AQI
159AQI
27th March 2025
152AQI
152AQI
28th March 2025
154AQI
154AQI
29th March 2025
151AQI
151AQI
30th March 2025
125AQI
125AQI
31st March 2025
114AQI
114AQI
1st April 2025
108AQI
108AQI
2nd April 2025
121AQI
121AQI
3rd April 2025
131AQI
131AQI
4th April 2025
132AQI
132AQI
5th April 2025
130AQI
130AQI
6th April 2025
104AQI
104AQI
7th April 2025
100AQI
100AQI
8th April 2025
93AQI
93AQI
9th April 2025
89AQI
89AQI
10th April 2025
82AQI
82AQI
11th April 2025
85AQI
85AQI
12th April 2025
73AQI
73AQI
13th April 2025
65AQI
65AQI
14th April 2025
75AQI
75AQI
15th April 2025
68AQI
68AQI
16th April 2025
71AQI
71AQI
17th April 2025
63AQI
63AQI
18th April 2025
64AQI
64AQI
19th April 2025
64AQI
64AQI
20th April 2025
65AQI
65AQI
21st April 2025
68AQI
68AQI
22nd April 2025
76AQI
76AQI
23rd April 2025
80AQI
80AQI
24th April 2025
84AQI
84AQI
25th April 2025
90AQI
90AQI
26th April 2025
87AQI
87AQI
27th April 2025
75AQI
75AQI
28th April 2025
77AQI
77AQI
29th April 2025
72AQI
72AQI
30th April 2025
75AQI
75AQI
1st May 2025
75AQI
75AQI
2nd May 2025
76AQI
76AQI
3rd May 2025
72AQI
72AQI
4th May 2025
83AQI
83AQI
5th May 2025
87AQI
87AQI
6th May 2025
78AQI
78AQI
7th May 2025
86AQI
86AQI
8th May 2025
72AQI
72AQI
9th May 2025
63AQI
63AQI
10th May 2025
68AQI
68AQI
11th May 2025
50AQI
50AQI
12th May 2025
44AQI
44AQI
13th May 2025
64AQI
64AQI
14th May 2025
64AQI
64AQI
15th May 2025
47AQI
47AQI
16th May 2025
45AQI
45AQI
17th May 2025
55AQI
55AQI
18th May 2025
48AQI
48AQI
19th May 2025
52AQI
52AQI
20th May 2025
49AQI
49AQI
21st May 2025
56AQI
56AQI
22nd May 2025
53AQI
53AQI
23rd May 2025
53AQI
53AQI
24th May 2025
45AQI
45AQI
25th May 2025
43AQI
43AQI
26th May 2025
37AQI
37AQI
27th May 2025
38AQI
38AQI
28th May 2025
46AQI
46AQI
29th May 2025
42AQI
42AQI
30th May 2025
45AQI
45AQI
31st May 2025
42AQI
42AQI
1st June 2025
41AQI
41AQI
2nd June 2025
40AQI
40AQI
3rd June 2025
44AQI
44AQI
4th June 2025
57AQI
57AQI
5th June 2025
58AQI
58AQI
6th June 2025
61AQI
61AQI
7th June 2025
65AQI
65AQI
8th June 2025
60AQI
60AQI
9th June 2025
58AQI
58AQI
10th June 2025
57AQI
57AQI
11th June 2025
47AQI
47AQI
12th June 2025
43AQI
43AQI
13th June 2025
47AQI
47AQI
14th June 2025
48AQI
48AQI
15th June 2025
36AQI
36AQI
16th June 2025
34AQI
34AQI
17th June 2025
42AQI
42AQI
18th June 2025
47AQI
47AQI
19th June 2025
43AQI
43AQI
20th June 2025
43AQI
43AQI
21st June 2025
45AQI
45AQI
22nd June 2025
44AQI
44AQI
23rd June 2025
42AQI
42AQI
24th June 2025
43AQI
43AQI
25th June 2025
42AQI
42AQI
26th June 2025
45AQI
45AQI
27th June 2025
45AQI
45AQI
28th June 2025
41AQI
41AQI
29th June 2025
42AQI
42AQI
30th June 2025
41AQI
41AQI
1st July 2025
45AQI
45AQI
2nd July 2025
41AQI
41AQI
3rd July 2025
42AQI
42AQI
4th July 2025
44AQI
44AQI
5th July 2025
47AQI
47AQI
6th July 2025
41AQI
41AQI
7th July 2025
43AQI
43AQI
8th July 2025
49AQI
49AQI
9th July 2025
49AQI
49AQI
10th July 2025
53AQI
53AQI
11th July 2025
47AQI
47AQI
12th July 2025
52AQI
52AQI
13th July 2025
48AQI
48AQI
14th July 2025
50AQI
50AQI
15th July 2025
51AQI
51AQI
16th July 2025
44AQI
44AQI
17th July 2025
47AQI
47AQI
18th July 2025
42AQI
42AQI
19th July 2025
41AQI
41AQI
20th July 2025
38AQI
38AQI
21st July 2025
40AQI
40AQI
22nd July 2025
37AQI
37AQI
23rd July 2025
38AQI
38AQI
24th July 2025
41AQI
41AQI
25th July 2025
46AQI
46AQI
26th July 2025
51AQI
51AQI
27th July 2025
46AQI
46AQI
28th July 2025
46AQI
46AQI
29th July 2025
45AQI
45AQI
30th July 2025
47AQI
47AQI
31st July 2025
53AQI
53AQI
1st August 2025
58AQI
58AQI
2nd August 2025
56AQI
56AQI
3rd August 2025
58AQI
58AQI
4th August 2025
58AQI
58AQI
110AQI
90AQI
110AQI
86AQI
57AQI
47AQI
45AQI
58AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202577AQI
10
21
21
7
14
10
7
24
6
14
17
23
7
26
5
4
63
102
44
7
Highest AQI recorded in
January110AQI
Lowest AQI recorded in
July45AQI
202465AQI
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 recorded in
April142AQI
Lowest AQI recorded in
September39AQI
2023157AQI
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 recorded in
January232AQI
Lowest AQI recorded in
June46AQI
2022136AQI
2
2
4
14
5
1
9
8
5
25
15
Highest AQI recorded in
December147AQI
Lowest AQI recorded in
November127AQI
Most & Least Polluted Years Over the Last 4 Years
Most Polluted Year Recorded
2023(Avg.)
157AQILeast Polluted Year Recorded
2024(Avg.)
65AQIFaculty of Engineering National University of Laos Purple Air Project's annual 2025 AQI (77) shows an average percentage change of -25.01% (improved AQI) compared to previous years: 2022 (136), 2023 (157), 2024 (65).
