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+
October Air Quality Analysis
Faculty of Engineering National University of Laos Purple Air Project, Vientiane, Viangchan, Laos
2022
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
30th Oct 2022
163AQILowest AQI recorded on
20th Oct 2024
21AQISame Day Analysis (8th October ):
On this day, AQI across the 3 years varied significantly: 2025 ranks 1st highest AQI at 63 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 8th Oct - 9th Oct 2025
Faculty of Engineering National University of Laos Purple Air Project, Vientiane, Viangchan, Laos
AQI
Day
Night
.
5 AM8th Oct 2025
6 PM
4 AM9th Oct 2025
Day time
Avg. Highest Time
12AMNaNth undefined
AQI
Avg. Lowest Time
12AMNaNth undefined
AQI
Night time
Avg. Highest Time
10PM8th Oct
94AQI
Avg. Lowest Time
7AM8th Oct
45AQI
In the last 24 hours,
Faculty of Engineering National University of Laos Purple Air Project's AQI reached its highest point of 94 at 10 PM during the Night, while the lowest point, 45, was recorded at 7 AM during the Night between 8th Oct and 9th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Faculty of Engineering National University of Laos Purple Air Project, Vientiane, Viangchan, Laos
SepOct
09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th
Day
Night
9th Sep 2025525 AMAQI
9th Sep 2025516 AMAQI
9th Sep 2025357 AMAQI
9th Sep 2025368 AMAQI
9th Sep 2025479 AMAQI
9th Sep 20253010 AMAQI
9th Sep 20253811 AMAQI
9th Sep 20254612 PMAQI
9th Sep 2025371 PMAQI
9th Sep 2025372 PMAQI
9th Sep 2025323 PMAQI
9th Sep 2025344 PMAQI
9th Sep 2025335 PMAQI
9th Sep 2025456 PMAQI
9th Sep 2025467 PMAQI
9th Sep 2025538 PMAQI
9th Sep 2025529 PMAQI
9th Sep 20255110 PMAQI
9th Sep 20254911 PMAQI
10th Sep 20255112 AMAQI
10th Sep 2025501 AMAQI
10th Sep 2025512 AMAQI
10th Sep 2025513 AMAQI
10th Sep 2025504 AMAQI
25°C23/29°C
10th Sep 2025505 AMAQI
10th Sep 2025496 AMAQI
10th Sep 2025407 AMAQI
10th Sep 2025448 AMAQI
10th Sep 2025479 AMAQI
10th Sep 20254310 AMAQI
10th Sep 20255011 AMAQI
10th Sep 20253612 PMAQI
10th Sep 2025431 PMAQI
10th Sep 2025462 PMAQI
10th Sep 2025333 PMAQI
10th Sep 2025424 PMAQI
10th Sep 2025405 PMAQI
10th Sep 2025476 PMAQI
10th Sep 2025477 PMAQI
10th Sep 2025508 PMAQI
10th Sep 2025489 PMAQI
10th Sep 20254610 PMAQI
10th Sep 20255211 PMAQI
11th Sep 20255212 AMAQI
11th Sep 2025511 AMAQI
11th Sep 2025512 AMAQI
11th Sep 2025503 AMAQI
11th Sep 2025504 AMAQI
25°C23/29°C
11th Sep 2025495 AMAQI
11th Sep 2025486 AMAQI
11th Sep 2025457 AMAQI
11th Sep 2025448 AMAQI
11th Sep 2025449 AMAQI
11th Sep 20254310 AMAQI
11th Sep 20254611 AMAQI
11th Sep 20253812 PMAQI
11th Sep 2025381 PMAQI
11th Sep 2025422 PMAQI
11th Sep 2025343 PMAQI
11th Sep 2025464 PMAQI
11th Sep 2025445 PMAQI
11th Sep 2025476 PMAQI
11th Sep 2025487 PMAQI
11th Sep 2025488 PMAQI
11th Sep 2025519 PMAQI
11th Sep 20255410 PMAQI
11th Sep 20255711 PMAQI
12th Sep 20255412 AMAQI
12th Sep 2025541 AMAQI
12th Sep 2025512 AMAQI
12th Sep 2025503 AMAQI
12th Sep 2025504 AMAQI
26°C23/31°C
12th Sep 2025515 AMAQI
12th Sep 2025516 AMAQI
12th Sep 2025477 AMAQI
12th Sep 2025528 AMAQI
12th Sep 2025509 AMAQI
12th Sep 20254910 AMAQI
12th Sep 20254611 AMAQI
12th Sep 20254912 PMAQI
12th Sep 2025481 PMAQI
12th Sep 2025442 PMAQI
12th Sep 2025413 PMAQI
12th Sep 2025384 PMAQI
12th Sep 2025455 PMAQI
12th Sep 2025486 PMAQI
12th Sep 2025487 PMAQI
12th Sep 2025558 PMAQI
12th Sep 2025549 PMAQI
12th Sep 20255310 PMAQI
12th Sep 20255211 PMAQI
13th Sep 20254912 AMAQI
13th Sep 2025551 AMAQI
13th Sep 2025522 AMAQI
13th Sep 2025523 AMAQI
13th Sep 2025524 AMAQI
27°C24/32°C
13th Sep 2025525 AMAQI
13th Sep 2025526 AMAQI
13th Sep 2025537 AMAQI
13th Sep 2025498 AMAQI
13th Sep 2025489 AMAQI
13th Sep 20255510 AMAQI
13th Sep 20255711 AMAQI
13th Sep 20254912 PMAQI
13th Sep 2025361 PMAQI
13th Sep 2025662 PMAQI
13th Sep 2025483 PMAQI
13th Sep 2025484 PMAQI
13th Sep 2025435 PMAQI
13th Sep 2025516 PMAQI
13th Sep 2025497 PMAQI
13th Sep 2025558 PMAQI
13th Sep 2025539 PMAQI
13th Sep 20255210 PMAQI
13th Sep 20255111 PMAQI
14th Sep 20255312 AMAQI
14th Sep 2025511 AMAQI
14th Sep 2025482 AMAQI
14th Sep 2025503 AMAQI
14th Sep 2025504 AMAQI
27°C23/32°C
14th Sep 2025485 AMAQI
14th Sep 2025486 AMAQI
14th Sep 2025527 AMAQI
14th Sep 2025538 AMAQI
14th Sep 2025519 AMAQI
14th Sep 20254910 AMAQI
14th Sep 20254211 AMAQI
14th Sep 20254912 PMAQI
14th Sep 2025461 PMAQI
14th Sep 2025472 PMAQI
14th Sep 2025443 PMAQI
14th Sep 2025384 PMAQI
14th Sep 2025405 PMAQI
14th Sep 2025366 PMAQI
14th Sep 2025527 PMAQI
14th Sep 2025488 PMAQI
14th Sep 2025539 PMAQI
14th Sep 20255610 PMAQI
14th Sep 20255211 PMAQI
15th Sep 20255212 AMAQI
15th Sep 2025471 AMAQI
15th Sep 2025502 AMAQI
15th Sep 2025513 AMAQI
15th Sep 2025524 AMAQI
27°C23/32°C
15th Sep 2025515 AMAQI
15th Sep 2025506 AMAQI
15th Sep 2025527 AMAQI
15th Sep 2025598 AMAQI
15th Sep 2025589 AMAQI
15th Sep 20255110 AMAQI
15th Sep 20254611 AMAQI
15th Sep 20254612 PMAQI
15th Sep 2025431 PMAQI
15th Sep 2025452 PMAQI
15th Sep 2025303 PMAQI
15th Sep 2025444 PMAQI
15th Sep 2025395 PMAQI
15th Sep 2025426 PMAQI
15th Sep 2025547 PMAQI
15th Sep 2025578 PMAQI
15th Sep 2025549 PMAQI
15th Sep 20255710 PMAQI
15th Sep 20254811 PMAQI
16th Sep 20255512 AMAQI
16th Sep 2025531 AMAQI
16th Sep 2025522 AMAQI
16th Sep 2025523 AMAQI
16th Sep 2025524 AMAQI
27°C24/32°C
16th Sep 2025525 AMAQI
16th Sep 2025526 AMAQI
16th Sep 2025427 AMAQI
16th Sep 2025368 AMAQI
16th Sep 2025339 AMAQI
16th Sep 20254310 AMAQI
16th Sep 20253411 AMAQI
16th Sep 20253212 PMAQI
16th Sep 2025311 PMAQI
16th Sep 2025332 PMAQI
16th Sep 2025323 PMAQI
16th Sep 2025424 PMAQI
16th Sep 2025395 PMAQI
16th Sep 2025436 PMAQI
16th Sep 2025427 PMAQI
16th Sep 2025538 PMAQI
16th Sep 2025579 PMAQI
16th Sep 20255510 PMAQI
16th Sep 20256211 PMAQI
17th Sep 20255712 AMAQI
17th Sep 2025581 AMAQI
17th Sep 2025522 AMAQI
17th Sep 2025503 AMAQI
17th Sep 2025504 AMAQI
25°C23/30°C
17th Sep 2025505 AMAQI
17th Sep 2025496 AMAQI
17th Sep 2025457 AMAQI
17th Sep 2025428 AMAQI
17th Sep 2025349 AMAQI
17th Sep 20254610 AMAQI
17th Sep 20255411 AMAQI
17th Sep 20254812 PMAQI
17th Sep 2025451 PMAQI
17th Sep 2025412 PMAQI
17th Sep 2025403 PMAQI
17th Sep 2025404 PMAQI
17th Sep 2025375 PMAQI
17th Sep 2025486 PMAQI
17th Sep 2025457 PMAQI
17th Sep 2025488 PMAQI
17th Sep 2025509 PMAQI
17th Sep 20255210 PMAQI
17th Sep 20254811 PMAQI
18th Sep 20254912 AMAQI
18th Sep 2025531 AMAQI
18th Sep 2025532 AMAQI
18th Sep 2025523 AMAQI
18th Sep 2025524 AMAQI
27°C23/32°C
18th Sep 2025525 AMAQI
18th Sep 2025526 AMAQI
18th Sep 2025437 AMAQI
18th Sep 2025428 AMAQI
18th Sep 2025439 AMAQI
18th Sep 20253510 AMAQI
18th Sep 20253411 AMAQI
18th Sep 20253412 PMAQI
18th Sep 2025321 PMAQI
18th Sep 2025312 PMAQI
18th Sep 2025343 PMAQI
18th Sep 2025384 PMAQI
18th Sep 2025385 PMAQI
18th Sep 2025326 PMAQI
18th Sep 2025417 PMAQI
18th Sep 2025528 PMAQI
18th Sep 2025529 PMAQI
18th Sep 20254910 PMAQI
18th Sep 20255211 PMAQI
19th Sep 20255212 AMAQI
19th Sep 2025521 AMAQI
19th Sep 2025522 AMAQI
19th Sep 2025523 AMAQI
19th Sep 2025524 AMAQI
26°C23/32°C
19th Sep 2025525 AMAQI
19th Sep 2025516 AMAQI
19th Sep 2025327 AMAQI
19th Sep 2025268 AMAQI
19th Sep 2025209 AMAQI
19th Sep 20251610 AMAQI
19th Sep 20252111 AMAQI
19th Sep 20251812 PMAQI
19th Sep 2025201 PMAQI
19th Sep 2025182 PMAQI
19th Sep 2025183 PMAQI
19th Sep 2025194 PMAQI
19th Sep 2025225 PMAQI
19th Sep 2025246 PMAQI
19th Sep 2025357 PMAQI
19th Sep 2025428 PMAQI
19th Sep 2025409 PMAQI
19th Sep 20253710 PMAQI
19th Sep 20253911 PMAQI
20th Sep 20253612 AMAQI
20th Sep 2025461 AMAQI
20th Sep 2025482 AMAQI
20th Sep 2025493 AMAQI
20th Sep 2025484 AMAQI
26°C23/31°C
20th Sep 2025485 AMAQI
20th Sep 2025486 AMAQI
20th Sep 2025277 AMAQI
20th Sep 2025228 AMAQI
20th Sep 2025219 AMAQI
20th Sep 20252310 AMAQI
20th Sep 20252611 AMAQI
20th Sep 20252412 PMAQI
20th Sep 2025241 PMAQI
20th Sep 2025232 PMAQI
20th Sep 2025203 PMAQI
20th Sep 2025204 PMAQI
20th Sep 2025235 PMAQI
20th Sep 2025306 PMAQI
20th Sep 2025377 PMAQI
20th Sep 2025448 PMAQI
20th Sep 2025499 PMAQI
20th Sep 20255010 PMAQI
20th Sep 20254411 PMAQI
21st Sep 20254512 AMAQI
21st Sep 2025511 AMAQI
21st Sep 2025432 AMAQI
21st Sep 2025423 AMAQI
21st Sep 2025424 AMAQI
25°C23/29°C
21st Sep 2025425 AMAQI
21st Sep 2025426 AMAQI
21st Sep 2025307 AMAQI
21st Sep 2025268 AMAQI
21st Sep 2025419 AMAQI
21st Sep 20253710 AMAQI
21st Sep 20253611 AMAQI
21st Sep 20253012 PMAQI
21st Sep 2025321 PMAQI
21st Sep 2025202 PMAQI
21st Sep 2025203 PMAQI
21st Sep 2025194 PMAQI
21st Sep 2025235 PMAQI
21st Sep 2025256 PMAQI
21st Sep 2025387 PMAQI
21st Sep 2025468 PMAQI
21st Sep 2025549 PMAQI
21st Sep 20255210 PMAQI
21st Sep 20254911 PMAQI
22nd Sep 20254712 AMAQI
22nd Sep 2025411 AMAQI
22nd Sep 2025402 AMAQI
22nd Sep 2025383 AMAQI
22nd Sep 2025384 AMAQI
26°C24/29°C
22nd Sep 2025385 AMAQI
22nd Sep 2025386 AMAQI
22nd Sep 2025397 AMAQI
22nd Sep 2025468 AMAQI
22nd Sep 2025459 AMAQI
22nd Sep 20255010 AMAQI
22nd Sep 20254411 AMAQI
22nd Sep 20253312 PMAQI
22nd Sep 2025251 PMAQI
22nd Sep 2025212 PMAQI
22nd Sep 2025203 PMAQI
22nd Sep 2025194 PMAQI
22nd Sep 2025255 PMAQI
22nd Sep 2025266 PMAQI
22nd Sep 2025307 PMAQI
22nd Sep 2025288 PMAQI
22nd Sep 2025279 PMAQI
22nd Sep 20252610 PMAQI
22nd Sep 20252411 PMAQI
23rd Sep 20252412 AMAQI
23rd Sep 2025301 AMAQI
23rd Sep 2025362 AMAQI
23rd Sep 2025353 AMAQI
23rd Sep 2025384 AMAQI
26°C24/29°C
23rd Sep 2025395 AMAQI
23rd Sep 2025396 AMAQI
23rd Sep 2025327 AMAQI
23rd Sep 2025328 AMAQI
23rd Sep 2025349 AMAQI
23rd Sep 20253610 AMAQI
23rd Sep 20252911 AMAQI
23rd Sep 20252312 PMAQI
23rd Sep 2025241 PMAQI
23rd Sep 2025222 PMAQI
23rd Sep 2025183 PMAQI
23rd Sep 2025264 PMAQI
23rd Sep 2025265 PMAQI
23rd Sep 2025246 PMAQI
23rd Sep 2025287 PMAQI
23rd Sep 2025328 PMAQI
23rd Sep 2025369 PMAQI
23rd Sep 20253810 PMAQI
23rd Sep 20253111 PMAQI
24th Sep 20253012 AMAQI
24th Sep 2025341 AMAQI
24th Sep 2025322 AMAQI
24th Sep 2025323 AMAQI
24th Sep 2025344 AMAQI
26°C24/31°C
24th Sep 2025345 AMAQI
24th Sep 2025336 AMAQI
24th Sep 2025237 AMAQI
24th Sep 2025238 AMAQI
24th Sep 2025239 AMAQI
24th Sep 20252110 AMAQI
24th Sep 20252411 AMAQI
24th Sep 20252412 PMAQI
24th Sep 2025201 PMAQI
24th Sep 2025242 PMAQI
24th Sep 2025233 PMAQI
24th Sep 2025264 PMAQI
24th Sep 2025255 PMAQI
24th Sep 2025256 PMAQI
24th Sep 2025297 PMAQI
24th Sep 2025418 PMAQI
24th Sep 2025399 PMAQI
24th Sep 20252810 PMAQI
24th Sep 20252411 PMAQI
25th Sep 20252412 AMAQI
25th Sep 2025301 AMAQI
25th Sep 2025332 AMAQI
25th Sep 2025323 AMAQI
25th Sep 2025324 AMAQI
26°C23/29°C
25th Sep 2025305 AMAQI
25th Sep 2025306 AMAQI
25th Sep 2025267 AMAQI
25th Sep 2025308 AMAQI
25th Sep 2025269 AMAQI
25th Sep 20251810 AMAQI
25th Sep 20251811 AMAQI
25th Sep 20251712 PMAQI
25th Sep 2025151 PMAQI
25th Sep 2025142 PMAQI
25th Sep 2025163 PMAQI
25th Sep 2025154 PMAQI
25th Sep 2025175 PMAQI
25th Sep 2025196 PMAQI
25th Sep 2025227 PMAQI
25th Sep 2025448 PMAQI
25th Sep 2025569 PMAQI
25th Sep 20254610 PMAQI
25th Sep 20253611 PMAQI
26th Sep 20252212 AMAQI
26th Sep 2025231 AMAQI
26th Sep 2025242 AMAQI
26th Sep 2025233 AMAQI
26th Sep 2025224 AMAQI
26°C23/31°C
26th Sep 2025185 AMAQI
26th Sep 2025156 AMAQI
26th Sep 2025177 AMAQI
26th Sep 2025168 AMAQI
26th Sep 2025149 AMAQI
26th Sep 20251610 AMAQI
26th Sep 20251211 AMAQI
26th Sep 20251312 PMAQI
26th Sep 2025151 PMAQI
26th Sep 2025162 PMAQI
26th Sep 2025143 PMAQI
26th Sep 2025154 PMAQI
26th Sep 2025205 PMAQI
26th Sep 2025246 PMAQI
26th Sep 2025377 PMAQI
26th Sep 2025368 PMAQI
26th Sep 2025309 PMAQI
26th Sep 20252810 PMAQI
26th Sep 20252911 PMAQI
27th Sep 20252012 AMAQI
27th Sep 2025121 AMAQI
27th Sep 2025132 AMAQI
27th Sep 2025153 AMAQI
27th Sep 2025174 AMAQI
25°C23/28°C
27th Sep 2025325 AMAQI
27th Sep 2025556 AMAQI
27th Sep 2025627 AMAQI
27th Sep 2025538 AMAQI
27th Sep 2025499 AMAQI
27th Sep 20254510 AMAQI
27th Sep 20253711 AMAQI
27th Sep 20253312 PMAQI
27th Sep 2025331 PMAQI
27th Sep 2025352 PMAQI
27th Sep 2025333 PMAQI
27th Sep 2025234 PMAQI
27th Sep 2025145 PMAQI
27th Sep 2025166 PMAQI
27th Sep 2025287 PMAQI
27th Sep 2025398 PMAQI
27th Sep 2025449 PMAQI
27th Sep 20255110 PMAQI
27th Sep 20256411 PMAQI
28th Sep 20256812 AMAQI
28th Sep 2025671 AMAQI
28th Sep 2025622 AMAQI
28th Sep 2025563 AMAQI
28th Sep 2025444 AMAQI
25°C23/30°C
28th Sep 2025315 AMAQI
28th Sep 2025256 AMAQI
28th Sep 2025217 AMAQI
28th Sep 2025178 AMAQI
28th Sep 2025189 AMAQI
28th Sep 20251810 AMAQI
28th Sep 20252411 AMAQI
28th Sep 20252512 PMAQI
28th Sep 2025211 PMAQI
28th Sep 2025312 PMAQI
28th Sep 2025303 PMAQI
28th Sep 2025324 PMAQI
28th Sep 2025365 PMAQI
28th Sep 2025436 PMAQI
28th Sep 2025467 PMAQI
28th Sep 2025468 PMAQI
28th Sep 2025369 PMAQI
28th Sep 20254410 PMAQI
28th Sep 20254511 PMAQI
29th Sep 20253012 AMAQI
29th Sep 2025411 AMAQI
29th Sep 2025442 AMAQI
29th Sep 2025403 AMAQI
29th Sep 2025424 AMAQI
27°C23/33°C
29th Sep 2025405 AMAQI
29th Sep 2025366 AMAQI
29th Sep 2025437 AMAQI
29th Sep 2025458 AMAQI
29th Sep 2025489 AMAQI
29th Sep 20254910 AMAQI
29th Sep 20255211 AMAQI
29th Sep 20255312 PMAQI
29th Sep 2025501 PMAQI
29th Sep 2025462 PMAQI
29th Sep 2025423 PMAQI
29th Sep 2025524 PMAQI
29th Sep 2025495 PMAQI
29th Sep 2025426 PMAQI
29th Sep 2025467 PMAQI
29th Sep 2025408 PMAQI
29th Sep 2025389 PMAQI
29th Sep 20253410 PMAQI
29th Sep 20253111 PMAQI
30th Sep 20253112 AMAQI
30th Sep 2025471 AMAQI
30th Sep 2025432 AMAQI
30th Sep 2025313 AMAQI
30th Sep 2025264 AMAQI
24°C23/25°C
30th Sep 2025325 AMAQI
30th Sep 2025296 AMAQI
30th Sep 2025287 AMAQI
30th Sep 2025218 AMAQI
30th Sep 2025299 AMAQI
30th Sep 20253310 AMAQI
30th Sep 20253111 AMAQI
30th Sep 20253312 PMAQI
30th Sep 2025371 PMAQI
30th Sep 2025392 PMAQI
30th Sep 2025403 PMAQI
30th Sep 2025464 PMAQI
30th Sep 2025385 PMAQI
30th Sep 2025436 PMAQI
30th Sep 2025547 PMAQI
30th Sep 2025638 PMAQI
30th Sep 2025779 PMAQI
30th Sep 20257510 PMAQI
30th Sep 20255411 PMAQI
1st Oct 20254412 AMAQI
1st Oct 2025501 AMAQI
1st Oct 2025502 AMAQI
1st Oct 2025493 AMAQI
1st Oct 2025494 AMAQI
24°C23/26°C
1st Oct 2025465 AMAQI
1st Oct 2025406 AMAQI
1st Oct 2025287 AMAQI
1st Oct 2025268 AMAQI
1st Oct 2025309 AMAQI
1st Oct 20254410 AMAQI
1st Oct 20254211 AMAQI
1st Oct 20254012 PMAQI
1st Oct 2025381 PMAQI
1st Oct 2025382 PMAQI
1st Oct 2025393 PMAQI
1st Oct 2025334 PMAQI
1st Oct 2025325 PMAQI
1st Oct 2025386 PMAQI
1st Oct 2025507 PMAQI
1st Oct 2025568 PMAQI
1st Oct 2025569 PMAQI
1st Oct 20256710 PMAQI
1st Oct 20257311 PMAQI
2nd Oct 20257612 AMAQI
2nd Oct 2025801 AMAQI
2nd Oct 2025782 AMAQI
2nd Oct 2025843 AMAQI
2nd Oct 2025844 AMAQI
25°C23/29°C
2nd Oct 2025715 AMAQI
2nd Oct 2025726 AMAQI
2nd Oct 2025687 AMAQI
2nd Oct 2025698 AMAQI
2nd Oct 2025659 AMAQI
2nd Oct 20255910 AMAQI
2nd Oct 20255611 AMAQI
2nd Oct 20256212 PMAQI
2nd Oct 2025561 PMAQI
2nd Oct 2025562 PMAQI
2nd Oct 2025553 PMAQI
2nd Oct 2025564 PMAQI
2nd Oct 2025575 PMAQI
2nd Oct 2025616 PMAQI
2nd Oct 2025677 PMAQI
2nd Oct 2025758 PMAQI
2nd Oct 2025799 PMAQI
2nd Oct 20258510 PMAQI
2nd Oct 20258911 PMAQI
3rd Oct 202510312 AMAQI
3rd Oct 20251251 AMAQI
3rd Oct 20251472 AMAQI
3rd Oct 20251443 AMAQI
3rd Oct 20251394 AMAQI
27°C23/32°C
3rd Oct 20251345 AMAQI
3rd Oct 20251276 AMAQI
3rd Oct 2025827 AMAQI
3rd Oct 2025748 AMAQI
3rd Oct 2025629 AMAQI
3rd Oct 20256810 AMAQI
3rd Oct 20256411 AMAQI
3rd Oct 20255812 PMAQI
3rd Oct 2025531 PMAQI
3rd Oct 2025562 PMAQI
3rd Oct 2025573 PMAQI
3rd Oct 2025574 PMAQI
3rd Oct 2025595 PMAQI
3rd Oct 2025516 PMAQI
3rd Oct 2025687 PMAQI
3rd Oct 2025728 PMAQI
3rd Oct 2025759 PMAQI
3rd Oct 20257810 PMAQI
3rd Oct 20258311 PMAQI
4th Oct 20257812 AMAQI
4th Oct 2025821 AMAQI
4th Oct 2025852 AMAQI
4th Oct 2025823 AMAQI
4th Oct 2025804 AMAQI
27°C23/32°C
4th Oct 2025745 AMAQI
4th Oct 2025716 AMAQI
4th Oct 2025647 AMAQI
4th Oct 2025618 AMAQI
4th Oct 2025579 AMAQI
4th Oct 20255410 AMAQI
4th Oct 20255011 AMAQI
4th Oct 20255412 PMAQI
4th Oct 2025541 PMAQI
4th Oct 2025542 PMAQI
4th Oct 2025513 PMAQI
4th Oct 2025514 PMAQI
4th Oct 2025545 PMAQI
4th Oct 2025556 PMAQI
4th Oct 2025597 PMAQI
4th Oct 2025598 PMAQI
4th Oct 2025639 PMAQI
4th Oct 20256610 PMAQI
4th Oct 20255911 PMAQI
5th Oct 20256212 AMAQI
5th Oct 2025601 AMAQI
5th Oct 2025612 AMAQI
5th Oct 2025593 AMAQI
5th Oct 2025584 AMAQI
27°C23/32°C
5th Oct 2025575 AMAQI
5th Oct 2025556 AMAQI
5th Oct 2025587 AMAQI
5th Oct 2025588 AMAQI
5th Oct 2025529 AMAQI
5th Oct 20256010 AMAQI
5th Oct 20256811 AMAQI
5th Oct 20256612 PMAQI
5th Oct 2025621 PMAQI
5th Oct 2025602 PMAQI
5th Oct 2025563 PMAQI
5th Oct 2025574 PMAQI
5th Oct 2025595 PMAQI
5th Oct 2025656 PMAQI
5th Oct 2025597 PMAQI
5th Oct 2025588 PMAQI
5th Oct 2025619 PMAQI
5th Oct 20255710 PMAQI
5th Oct 20255811 PMAQI
6th Oct 20255912 AMAQI
6th Oct 2025561 AMAQI
6th Oct 2025582 AMAQI
6th Oct 2025603 AMAQI
6th Oct 2025614 AMAQI
27°C23/32°C
6th Oct 2025605 AMAQI
6th Oct 2025596 AMAQI
6th Oct 2025577 AMAQI
6th Oct 2025578 AMAQI
6th Oct 2025569 AMAQI
6th Oct 20255910 AMAQI
6th Oct 20256811 AMAQI
6th Oct 20257212 PMAQI
6th Oct 2025741 PMAQI
6th Oct 2025682 PMAQI
6th Oct 2025593 PMAQI
6th Oct 2025634 PMAQI
6th Oct 2025635 PMAQI
6th Oct 2025636 PMAQI
6th Oct 2025617 PMAQI
6th Oct 2025648 PMAQI
6th Oct 2025659 PMAQI
6th Oct 20256810 PMAQI
6th Oct 20257211 PMAQI
7th Oct 20257512 AMAQI
26°C23/30°C
7th Oct 2025626 PMAQI
7th Oct 2025567 PMAQI
7th Oct 2025628 PMAQI
7th Oct 2025639 PMAQI
7th Oct 20257510 PMAQI
7th Oct 20257211 PMAQI
8th Oct 20257012 AMAQI
8th Oct 2025751 AMAQI
8th Oct 2025632 AMAQI
8th Oct 2025613 AMAQI
8th Oct 2025624 AMAQI
25°C23/30°C
8th Oct 2025625 AMAQI
8th Oct 2025596 AMAQI
8th Oct 2025457 AMAQI
8th Oct 2025518 AMAQI
8th Oct 2025549 AMAQI
8th Oct 20256010 AMAQI
8th Oct 20256011 AMAQI
8th Oct 20256112 PMAQI
8th Oct 2025571 PMAQI
8th Oct 2025592 PMAQI
8th Oct 2025563 PMAQI
8th Oct 2025584 PMAQI
8th Oct 2025565 PMAQI
8th Oct 2025566 PMAQI
8th Oct 2025597 PMAQI
8th Oct 2025658 PMAQI
8th Oct 2025799 PMAQI
8th Oct 20259410 PMAQI
8th Oct 20258711 PMAQI
9th Oct 20259112 AMAQI
9th Oct 2025861 AMAQI
9th Oct 2025872 AMAQI
9th Oct 2025843 AMAQI
9th Oct 2025864 AMAQI
--°C/°C
9th Oct 2025855 AMAQI
5 AM9th Oct 2025846 AMAQI
11 AM
6 PM
11 PM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 6 AM
51AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
3 PM
36AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 6 AM (Avg. 51), while the lowest AQI was between 3 PM to 3 PM (Avg. 36).
Night time
Avg. Highest Time
1 AM - 4 AM
53AQI
4 hours / Day
120 hours / Month
Avg. Lowest Time
7 PM
46AQI
1 hours / Day
30 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 7 PM (Avg. 46).
2025 Days Vs Air Quality
Faculty of Engineering National University of Laos Purple Air Project, Vientiane, Viangchan, Laos
2025
36%
102
46%
128
16%
44
2%
7
Total number of days with different AQI categories in last 281 days in 2025 (84 days remaining)
Good
102 DaysModerate
128 DaysPoor
44 DaysUnhealthy
7 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 36%
Health Risk Level:
High
In 2025, 36% of 281 days were within WHO’s safe air quality limits. The risk of health issues is High, with respiratory problems, heart disease, skin issues, and stress being more common, particularly among children and the elderly.
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.
-1th undefined 2025
-1th undefined 2025
-1th undefined 2025
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
57AQI
57AQI
5th August 2025
56AQI
56AQI
6th August 2025
54AQI
54AQI
7th August 2025
51AQI
51AQI
8th August 2025
50AQI
50AQI
9th August 2025
47AQI
47AQI
10th August 2025
44AQI
44AQI
11th August 2025
41AQI
41AQI
12th August 2025
48AQI
48AQI
13th August 2025
50AQI
50AQI
14th August 2025
52AQI
52AQI
15th August 2025
49AQI
49AQI
16th August 2025
47AQI
47AQI
17th August 2025
45AQI
45AQI
18th August 2025
48AQI
48AQI
19th August 2025
50AQI
50AQI
20th August 2025
51AQI
51AQI
21st August 2025
56AQI
56AQI
22nd August 2025
55AQI
55AQI
23rd August 2025
53AQI
53AQI
24th August 2025
51AQI
51AQI
25th August 2025
53AQI
53AQI
26th August 2025
47AQI
47AQI
27th August 2025
49AQI
49AQI
28th August 2025
50AQI
50AQI
29th August 2025
53AQI
53AQI
30th August 2025
52AQI
52AQI
31st August 2025
48AQI
48AQI
1st September 2025
47AQI
47AQI
2nd September 2025
48AQI
48AQI
3rd September 2025
54AQI
54AQI
4th September 2025
46AQI
46AQI
5th September 2025
51AQI
51AQI
6th September 2025
51AQI
51AQI
7th September 2025
53AQI
53AQI
8th September 2025
51AQI
51AQI
9th September 2025
46AQI
46AQI
10th September 2025
48AQI
48AQI
11th September 2025
48AQI
48AQI
12th September 2025
51AQI
51AQI
13th September 2025
51AQI
51AQI
14th September 2025
49AQI
49AQI
15th September 2025
50AQI
50AQI
16th September 2025
48AQI
48AQI
17th September 2025
49AQI
49AQI
18th September 2025
44AQI
44AQI
19th September 2025
38AQI
38AQI
20th September 2025
36AQI
36AQI
21st September 2025
40AQI
40AQI
22nd September 2025
35AQI
35AQI
23rd September 2025
30AQI
30AQI
24th September 2025
29AQI
29AQI
25th September 2025
27AQI
27AQI
26th September 2025
22AQI
22AQI
27th September 2025
33AQI
33AQI
28th September 2025
43AQI
43AQI
29th September 2025
40AQI
40AQI
30th September 2025
40AQI
40AQI
1st October 2025
46AQI
46AQI
2nd October 2025
72AQI
72AQI
3rd October 2025
87AQI
87AQI
4th October 2025
66AQI
66AQI
5th October 2025
60AQI
60AQI
6th October 2025
61AQI
61AQI
7th October 2025
68AQI
68AQI
8th October 2025
63AQI
63AQI
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
110AQI
90AQI
110AQI
86AQI
57AQI
47AQI
45AQI
51AQI
43AQI
65AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202571AQI
10
21
21
7
14
10
7
24
6
14
17
23
7
26
5
15
16
23
7
1
7
102
128
44
7
Highest AQI recorded in
January110AQI
Lowest AQI recorded in
September43AQI
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 (71) shows an average percentage change of -31.4% (improved AQI) compared to previous years: 2022 (136), 2023 (157), 2024 (65).
