Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Koh Chang Maesai, Mae Sai, Chiang Rai, Thailand 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

Koh Chang Maesai, Mae Sai, Chiang Rai, Thailand

2021
2022
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
26th Aug 2021
64AQI
Lowest AQI recorded on
15th Aug 2021
18AQI

Same Day Analysis (1st August ):
On this day, AQI across the 4 years varied significantly: 2025 ranks 1st highest AQI at 57 of Moderate air quality on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 1st Aug - 2nd Aug 2025

Koh Chang Maesai, Mae Sai, Chiang Rai, Thailand

AQI
Day
Night
.

5 AM1st Aug 2025

7 PM

4 AM2nd Aug 2025

Day time
Avg. Highest Time
12PM1st Aug

66AQI

Avg. Lowest Time
3PM1st Aug

50AQI

Night time
Avg. Highest Time
7PM1st Aug

59AQI

Avg. Lowest Time
4AM2nd Aug

55AQI

In the last 24 hours,

Koh Chang Maesai's AQI reached its highest point of 66 at 12 PM during the Day, while the lowest point, 50, was recorded at 3 PM during the Day between 1st Aug and 2nd Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Koh Chang Maesai, Mae Sai, Chiang Rai, Thailand

JulAug
03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd
Day
Night
3rd Jul 2025495 AMAQI
3rd Jul 2025496 AMAQI
3rd Jul 2025507 AMAQI
3rd Jul 2025558 AMAQI
3rd Jul 2025559 AMAQI
3rd Jul 20255510 AMAQI
3rd Jul 20255511 AMAQI
3rd Jul 20255512 PMAQI
3rd Jul 2025551 PMAQI
3rd Jul 2025552 PMAQI
3rd Jul 2025553 PMAQI
3rd Jul 2025534 PMAQI
3rd Jul 2025545 PMAQI
3rd Jul 2025526 PMAQI
3rd Jul 2025547 PMAQI
3rd Jul 2025548 PMAQI
3rd Jul 2025559 PMAQI
3rd Jul 20255410 PMAQI
3rd Jul 20255111 PMAQI
4th Jul 20255112 AMAQI
4th Jul 2025501 AMAQI
4th Jul 2025502 AMAQI
4th Jul 2025513 AMAQI
4th Jul 2025514 AMAQI

23°C22/25°C

4th Jul 2025515 AMAQI
4th Jul 2025516 AMAQI
4th Jul 2025367 AMAQI
4th Jul 2025358 AMAQI
4th Jul 2025429 AMAQI
4th Jul 20254910 AMAQI
4th Jul 20254411 AMAQI
4th Jul 20254112 PMAQI
4th Jul 2025441 PMAQI
4th Jul 2025432 PMAQI
4th Jul 2025383 PMAQI
4th Jul 2025404 PMAQI
4th Jul 2025435 PMAQI
4th Jul 2025486 PMAQI
4th Jul 2025497 PMAQI
4th Jul 2025548 PMAQI
4th Jul 2025549 PMAQI
4th Jul 20255510 PMAQI
4th Jul 20255211 PMAQI
5th Jul 20255012 AMAQI
5th Jul 2025501 AMAQI
5th Jul 2025482 AMAQI
5th Jul 2025473 AMAQI
5th Jul 2025484 AMAQI

23°C21/26°C

5th Jul 2025465 AMAQI
5th Jul 2025466 AMAQI
5th Jul 2025377 AMAQI
5th Jul 2025378 AMAQI
5th Jul 2025419 AMAQI
5th Jul 20254810 AMAQI
5th Jul 20255211 AMAQI
5th Jul 20254912 PMAQI
5th Jul 2025451 PMAQI
5th Jul 2025442 PMAQI
5th Jul 2025453 PMAQI
5th Jul 2025394 PMAQI
5th Jul 2025455 PMAQI
5th Jul 2025416 PMAQI
5th Jul 2025467 PMAQI
5th Jul 2025508 PMAQI
5th Jul 2025529 PMAQI
5th Jul 20254810 PMAQI
5th Jul 20254811 PMAQI
6th Jul 20254612 AMAQI
6th Jul 2025461 AMAQI
6th Jul 2025422 AMAQI
6th Jul 2025443 AMAQI
6th Jul 2025444 AMAQI

24°C22/27°C

6th Jul 2025435 AMAQI
6th Jul 2025456 AMAQI
6th Jul 2025327 AMAQI
6th Jul 2025228 AMAQI
6th Jul 2025239 AMAQI
6th Jul 20252610 AMAQI
6th Jul 20254211 AMAQI
6th Jul 20254012 PMAQI
6th Jul 2025401 PMAQI
6th Jul 2025352 PMAQI
6th Jul 2025363 PMAQI
6th Jul 2025424 PMAQI
6th Jul 2025355 PMAQI
6th Jul 2025386 PMAQI
6th Jul 2025457 PMAQI
6th Jul 2025448 PMAQI
6th Jul 2025449 PMAQI
6th Jul 20254410 PMAQI
6th Jul 20254311 PMAQI
7th Jul 20254312 AMAQI
7th Jul 2025421 AMAQI
7th Jul 2025412 AMAQI
7th Jul 2025413 AMAQI
7th Jul 2025414 AMAQI

23°C20/24°C

7th Jul 2025405 AMAQI
7th Jul 2025406 AMAQI
7th Jul 2025287 AMAQI
7th Jul 2025288 AMAQI
7th Jul 2025399 AMAQI
7th Jul 20253510 AMAQI
7th Jul 20253811 AMAQI
7th Jul 20254212 PMAQI
7th Jul 2025331 PMAQI
7th Jul 2025372 PMAQI
7th Jul 2025363 PMAQI
7th Jul 2025364 PMAQI
7th Jul 2025385 PMAQI
7th Jul 2025406 PMAQI
7th Jul 2025487 PMAQI
7th Jul 2025508 PMAQI
7th Jul 2025519 PMAQI
7th Jul 20254610 PMAQI
7th Jul 20254011 PMAQI
8th Jul 20253812 AMAQI
8th Jul 2025401 AMAQI
8th Jul 2025402 AMAQI
8th Jul 2025393 AMAQI
8th Jul 2025404 AMAQI

23°C20/25°C

8th Jul 2025405 AMAQI
8th Jul 2025416 AMAQI
8th Jul 2025287 AMAQI
8th Jul 2025308 AMAQI
8th Jul 2025409 AMAQI
8th Jul 20253210 AMAQI
8th Jul 20254011 AMAQI
8th Jul 20254612 PMAQI
8th Jul 2025471 PMAQI
8th Jul 2025372 PMAQI
8th Jul 2025403 PMAQI
8th Jul 2025534 PMAQI
8th Jul 2025525 PMAQI
8th Jul 2025486 PMAQI
8th Jul 2025507 PMAQI
8th Jul 2025538 PMAQI
8th Jul 2025539 PMAQI
8th Jul 20255210 PMAQI
8th Jul 20255011 PMAQI
9th Jul 20255112 AMAQI
9th Jul 2025441 AMAQI
9th Jul 2025382 AMAQI
9th Jul 2025373 AMAQI
9th Jul 2025364 AMAQI

25°C22/31°C

9th Jul 2025375 AMAQI
9th Jul 2025386 AMAQI
9th Jul 2025447 AMAQI
9th Jul 2025518 AMAQI
9th Jul 2025549 AMAQI
9th Jul 20255410 AMAQI
9th Jul 20256211 AMAQI
9th Jul 20255212 PMAQI
9th Jul 2025541 PMAQI
9th Jul 2025562 PMAQI
9th Jul 2025563 PMAQI
9th Jul 2025554 PMAQI
9th Jul 2025575 PMAQI
9th Jul 2025536 PMAQI
9th Jul 2025527 PMAQI
9th Jul 2025548 PMAQI
9th Jul 2025549 PMAQI
9th Jul 20255310 PMAQI
9th Jul 20255111 PMAQI
10th Jul 20254812 AMAQI
10th Jul 2025451 AMAQI
10th Jul 2025462 AMAQI
10th Jul 2025463 AMAQI
10th Jul 2025464 AMAQI

25°C20/29°C

10th Jul 2025445 AMAQI
10th Jul 2025446 AMAQI
10th Jul 2025427 AMAQI
10th Jul 2025488 AMAQI
10th Jul 2025509 AMAQI
10th Jul 20255010 AMAQI
10th Jul 20255411 AMAQI
10th Jul 20255412 PMAQI
10th Jul 2025541 PMAQI
10th Jul 2025572 PMAQI
10th Jul 2025533 PMAQI
10th Jul 2025524 PMAQI
10th Jul 2025545 PMAQI
10th Jul 2025556 PMAQI
10th Jul 2025527 PMAQI
10th Jul 2025508 PMAQI
10th Jul 2025529 PMAQI
10th Jul 20255010 PMAQI
10th Jul 20255011 PMAQI
11th Jul 20254912 AMAQI
11th Jul 2025461 AMAQI
11th Jul 2025452 AMAQI
11th Jul 2025483 AMAQI
11th Jul 2025484 AMAQI

24°C20/29°C

11th Jul 2025485 AMAQI
11th Jul 2025476 AMAQI
11th Jul 2025347 AMAQI
11th Jul 2025478 AMAQI
11th Jul 2025499 AMAQI
11th Jul 20255210 AMAQI
11th Jul 20255611 AMAQI
11th Jul 20255312 PMAQI
11th Jul 2025491 PMAQI
11th Jul 2025502 PMAQI
11th Jul 2025533 PMAQI
11th Jul 2025534 PMAQI
11th Jul 2025485 PMAQI
11th Jul 2025366 PMAQI
11th Jul 2025447 PMAQI
11th Jul 2025438 PMAQI
11th Jul 2025439 PMAQI
11th Jul 20254810 PMAQI
11th Jul 20254811 PMAQI
12th Jul 20254712 AMAQI
12th Jul 2025481 AMAQI
12th Jul 2025482 AMAQI
12th Jul 2025463 AMAQI
12th Jul 2025474 AMAQI

23°C20/26°C

12th Jul 2025485 AMAQI
12th Jul 2025476 AMAQI
12th Jul 2025467 AMAQI
12th Jul 2025438 AMAQI
12th Jul 2025409 AMAQI
12th Jul 20254110 AMAQI
12th Jul 20254411 AMAQI
12th Jul 20254712 PMAQI
12th Jul 2025491 PMAQI
12th Jul 2025402 PMAQI
12th Jul 2025363 PMAQI
12th Jul 2025394 PMAQI
12th Jul 2025415 PMAQI
12th Jul 2025476 PMAQI
12th Jul 2025437 PMAQI
12th Jul 2025468 PMAQI
12th Jul 2025389 PMAQI
12th Jul 20254010 PMAQI
12th Jul 20254011 PMAQI
13th Jul 20254312 AMAQI
13th Jul 2025481 AMAQI
13th Jul 2025472 AMAQI
13th Jul 2025463 AMAQI
13th Jul 2025444 AMAQI

24°C20/29°C

13th Jul 2025465 AMAQI
13th Jul 2025456 AMAQI
13th Jul 2025367 AMAQI
13th Jul 2025368 AMAQI
13th Jul 2025419 AMAQI
13th Jul 20255110 AMAQI
13th Jul 20255211 AMAQI
13th Jul 20255412 PMAQI
13th Jul 2025491 PMAQI
13th Jul 2025492 PMAQI
13th Jul 2025423 PMAQI
13th Jul 2025424 PMAQI
13th Jul 2025435 PMAQI
13th Jul 2025426 PMAQI
13th Jul 2025527 PMAQI
13th Jul 2025508 PMAQI
13th Jul 2025529 PMAQI
13th Jul 20255310 PMAQI
13th Jul 20255111 PMAQI
14th Jul 20255312 AMAQI
14th Jul 2025491 AMAQI
14th Jul 2025412 AMAQI
14th Jul 2025453 AMAQI
14th Jul 2025444 AMAQI

24°C20/30°C

14th Jul 2025445 AMAQI
14th Jul 2025446 AMAQI
14th Jul 2025457 AMAQI
14th Jul 2025528 AMAQI
14th Jul 2025549 AMAQI
14th Jul 20255510 AMAQI
14th Jul 20255411 AMAQI
14th Jul 20255012 PMAQI
14th Jul 2025481 PMAQI
14th Jul 2025522 PMAQI
14th Jul 2025433 PMAQI
14th Jul 2025434 PMAQI
14th Jul 2025405 PMAQI
14th Jul 2025386 PMAQI
14th Jul 2025427 PMAQI
14th Jul 2025428 PMAQI
14th Jul 2025449 PMAQI
14th Jul 20254110 PMAQI
14th Jul 20254611 PMAQI
15th Jul 20255012 AMAQI
15th Jul 2025471 AMAQI
15th Jul 2025492 AMAQI
15th Jul 2025503 AMAQI
15th Jul 2025484 AMAQI

24°C21/30°C

15th Jul 2025475 AMAQI
15th Jul 2025476 AMAQI
15th Jul 2025347 AMAQI
15th Jul 2025278 AMAQI
15th Jul 2025309 AMAQI
15th Jul 20254110 AMAQI
15th Jul 20254811 AMAQI
15th Jul 20253912 PMAQI
15th Jul 2025411 PMAQI
15th Jul 2025382 PMAQI
15th Jul 2025343 PMAQI
15th Jul 2025414 PMAQI
15th Jul 2025355 PMAQI
15th Jul 2025476 PMAQI
15th Jul 2025447 PMAQI
15th Jul 2025448 PMAQI
15th Jul 2025479 PMAQI
15th Jul 20254910 PMAQI
15th Jul 20254411 PMAQI
16th Jul 20255012 AMAQI
16th Jul 2025491 AMAQI
16th Jul 2025482 AMAQI
16th Jul 2025463 AMAQI
16th Jul 2025444 AMAQI

23°C21/26°C

16th Jul 2025445 AMAQI
16th Jul 2025446 AMAQI
16th Jul 2025407 AMAQI
16th Jul 2025428 AMAQI
16th Jul 2025469 AMAQI
16th Jul 20255010 AMAQI
16th Jul 20254211 AMAQI
16th Jul 20253912 PMAQI
16th Jul 2025401 PMAQI
16th Jul 2025482 PMAQI
16th Jul 2025383 PMAQI
16th Jul 2025434 PMAQI
16th Jul 2025435 PMAQI
16th Jul 2025446 PMAQI
16th Jul 2025467 PMAQI
16th Jul 2025518 PMAQI
16th Jul 2025499 PMAQI
16th Jul 20254910 PMAQI
16th Jul 20254411 PMAQI
17th Jul 20254812 AMAQI
17th Jul 2025481 AMAQI
17th Jul 2025472 AMAQI
17th Jul 2025463 AMAQI
17th Jul 2025454 AMAQI

23°C21/26°C

17th Jul 2025445 AMAQI
17th Jul 2025456 AMAQI
17th Jul 2025377 AMAQI
17th Jul 2025308 AMAQI
17th Jul 2025409 AMAQI
17th Jul 20255210 AMAQI
17th Jul 20255211 AMAQI
17th Jul 20255212 PMAQI
17th Jul 2025481 PMAQI
17th Jul 2025462 PMAQI
17th Jul 2025463 PMAQI
17th Jul 2025444 PMAQI
17th Jul 2025495 PMAQI
17th Jul 2025456 PMAQI
17th Jul 2025537 PMAQI
17th Jul 2025558 PMAQI
17th Jul 2025559 PMAQI
17th Jul 20255810 PMAQI
17th Jul 20255511 PMAQI
18th Jul 20254712 AMAQI
18th Jul 2025471 AMAQI
18th Jul 2025482 AMAQI
18th Jul 2025463 AMAQI
18th Jul 2025454 AMAQI

22°C21/24°C

18th Jul 2025455 AMAQI
18th Jul 2025466 AMAQI
18th Jul 2025437 AMAQI
18th Jul 2025448 AMAQI
18th Jul 2025469 AMAQI
18th Jul 20253510 AMAQI
18th Jul 20253511 AMAQI
18th Jul 20255112 PMAQI
18th Jul 2025531 PMAQI
18th Jul 2025452 PMAQI
18th Jul 2025423 PMAQI
18th Jul 2025364 PMAQI
18th Jul 2025375 PMAQI
18th Jul 2025406 PMAQI
18th Jul 2025467 PMAQI
18th Jul 2025518 PMAQI
18th Jul 2025479 PMAQI
18th Jul 20255110 PMAQI
18th Jul 20255311 PMAQI
19th Jul 20254812 AMAQI
19th Jul 2025501 AMAQI
19th Jul 2025502 AMAQI
19th Jul 2025483 AMAQI
19th Jul 2025484 AMAQI

23°C20/28°C

19th Jul 2025475 AMAQI
19th Jul 2025476 AMAQI
19th Jul 2025397 AMAQI
19th Jul 2025458 AMAQI
19th Jul 2025479 AMAQI
19th Jul 20254610 AMAQI
19th Jul 20255211 AMAQI
19th Jul 20255212 PMAQI
19th Jul 2025521 PMAQI
19th Jul 2025452 PMAQI
19th Jul 2025453 PMAQI
19th Jul 2025474 PMAQI
19th Jul 2025465 PMAQI
19th Jul 2025516 PMAQI
19th Jul 2025557 PMAQI
19th Jul 2025568 PMAQI
19th Jul 2025539 PMAQI
19th Jul 20255110 PMAQI
19th Jul 20255011 PMAQI
20th Jul 20255312 AMAQI
20th Jul 2025521 AMAQI
20th Jul 2025492 AMAQI
20th Jul 2025483 AMAQI
20th Jul 2025494 AMAQI

24°C19/31°C

20th Jul 2025485 AMAQI
20th Jul 2025476 AMAQI
20th Jul 2025417 AMAQI
20th Jul 2025368 AMAQI
20th Jul 2025349 AMAQI
20th Jul 20253610 AMAQI
20th Jul 20253411 AMAQI
20th Jul 20253412 PMAQI
20th Jul 2025371 PMAQI
20th Jul 2025382 PMAQI
20th Jul 2025273 PMAQI
20th Jul 2025254 PMAQI
20th Jul 2025345 PMAQI
20th Jul 2025376 PMAQI
20th Jul 2025467 PMAQI
20th Jul 2025498 PMAQI
20th Jul 2025499 PMAQI
20th Jul 20255410 PMAQI
20th Jul 20255311 PMAQI
21st Jul 20255212 AMAQI
21st Jul 2025521 AMAQI
21st Jul 2025502 AMAQI
21st Jul 2025503 AMAQI
21st Jul 2025504 AMAQI

25°C20/30°C

21st Jul 2025485 AMAQI
21st Jul 2025496 AMAQI
21st Jul 2025407 AMAQI
21st Jul 2025428 AMAQI
21st Jul 2025469 AMAQI
21st Jul 20255210 AMAQI
21st Jul 20255211 AMAQI
21st Jul 20255012 PMAQI
21st Jul 2025491 PMAQI
21st Jul 2025492 PMAQI
21st Jul 2025463 PMAQI
21st Jul 2025394 PMAQI
21st Jul 2025455 PMAQI
21st Jul 2025516 PMAQI
21st Jul 2025537 PMAQI
21st Jul 2025538 PMAQI
21st Jul 2025529 PMAQI
21st Jul 20255110 PMAQI
21st Jul 20254411 PMAQI
22nd Jul 20254812 AMAQI
22nd Jul 2025521 AMAQI
22nd Jul 2025522 AMAQI
22nd Jul 2025523 AMAQI
22nd Jul 2025524 AMAQI

24°C20/30°C

22nd Jul 2025525 AMAQI
22nd Jul 2025536 AMAQI
22nd Jul 2025467 AMAQI
22nd Jul 2025408 AMAQI
22nd Jul 2025519 AMAQI
22nd Jul 20255410 AMAQI
22nd Jul 20255611 AMAQI
22nd Jul 20255112 PMAQI
22nd Jul 2025431 PMAQI
22nd Jul 2025452 PMAQI
22nd Jul 2025423 PMAQI
22nd Jul 2025374 PMAQI
22nd Jul 2025365 PMAQI
22nd Jul 2025426 PMAQI
22nd Jul 2025487 PMAQI
22nd Jul 2025498 PMAQI
22nd Jul 2025469 PMAQI
22nd Jul 20254810 PMAQI
22nd Jul 20254811 PMAQI
23rd Jul 20255012 AMAQI
23rd Jul 2025501 AMAQI
23rd Jul 2025512 AMAQI
23rd Jul 2025523 AMAQI
23rd Jul 2025524 AMAQI

23°C21/24°C

23rd Jul 2025525 AMAQI
23rd Jul 2025526 AMAQI
23rd Jul 2025337 AMAQI
23rd Jul 2025258 AMAQI
23rd Jul 2025349 AMAQI
23rd Jul 20253410 AMAQI
23rd Jul 20254711 AMAQI
23rd Jul 20254212 PMAQI
23rd Jul 2025321 PMAQI
23rd Jul 2025342 PMAQI
23rd Jul 2025363 PMAQI
23rd Jul 2025324 PMAQI
23rd Jul 2025325 PMAQI
23rd Jul 2025366 PMAQI
23rd Jul 2025427 PMAQI
23rd Jul 2025428 PMAQI
23rd Jul 2025409 PMAQI
23rd Jul 20253910 PMAQI
23rd Jul 20254111 PMAQI
24th Jul 20253812 AMAQI
24th Jul 2025441 AMAQI
24th Jul 2025492 AMAQI
24th Jul 2025473 AMAQI
24th Jul 2025464 AMAQI

22°C21/24°C

24th Jul 2025465 AMAQI
24th Jul 2025466 AMAQI
24th Jul 2025327 AMAQI
24th Jul 2025308 AMAQI
24th Jul 2025329 AMAQI
24th Jul 20253310 AMAQI
24th Jul 20253011 AMAQI
24th Jul 20252412 PMAQI
24th Jul 2025271 PMAQI
24th Jul 2025332 PMAQI
24th Jul 2025303 PMAQI
24th Jul 2025334 PMAQI
24th Jul 2025345 PMAQI
24th Jul 2025436 PMAQI
24th Jul 2025437 PMAQI
24th Jul 2025408 PMAQI
24th Jul 2025429 PMAQI
24th Jul 20254310 PMAQI
24th Jul 20254011 PMAQI
25th Jul 20254012 AMAQI
25th Jul 2025431 AMAQI
25th Jul 2025402 AMAQI
25th Jul 2025383 AMAQI
25th Jul 2025374 AMAQI

22°C20/25°C

25th Jul 2025385 AMAQI
25th Jul 2025386 AMAQI
25th Jul 2025337 AMAQI
25th Jul 2025328 AMAQI
25th Jul 2025439 AMAQI
25th Jul 20254310 AMAQI
25th Jul 20253811 AMAQI
25th Jul 20253412 PMAQI
25th Jul 2025361 PMAQI
25th Jul 2025342 PMAQI
25th Jul 2025403 PMAQI
25th Jul 2025344 PMAQI
25th Jul 2025345 PMAQI
25th Jul 2025376 PMAQI
25th Jul 2025417 PMAQI
25th Jul 2025428 PMAQI
25th Jul 2025459 PMAQI
25th Jul 20254610 PMAQI
25th Jul 20254611 PMAQI
26th Jul 20254012 AMAQI
26th Jul 2025411 AMAQI
26th Jul 2025382 AMAQI
26th Jul 2025393 AMAQI
26th Jul 2025424 AMAQI

23°C21/25°C

26th Jul 2025385 AMAQI
26th Jul 2025386 AMAQI
26th Jul 2025407 AMAQI
26th Jul 2025448 AMAQI
26th Jul 2025489 AMAQI
26th Jul 20255510 AMAQI
26th Jul 20253811 AMAQI
26th Jul 20253712 PMAQI
26th Jul 2025371 PMAQI
26th Jul 2025432 PMAQI
26th Jul 2025483 PMAQI
26th Jul 2025464 PMAQI
26th Jul 2025405 PMAQI
26th Jul 2025366 PMAQI
26th Jul 2025437 PMAQI
26th Jul 2025448 PMAQI
26th Jul 2025489 PMAQI
26th Jul 20254610 PMAQI
26th Jul 20254211 PMAQI
27th Jul 20254412 AMAQI
27th Jul 2025441 AMAQI
27th Jul 2025402 AMAQI
27th Jul 2025403 AMAQI
27th Jul 2025404 AMAQI

23°C20/26°C

27th Jul 2025405 AMAQI
27th Jul 2025406 AMAQI
27th Jul 2025367 AMAQI
27th Jul 2025368 AMAQI
27th Jul 2025409 AMAQI
27th Jul 20255110 AMAQI
27th Jul 20254411 AMAQI
27th Jul 20254812 PMAQI
27th Jul 2025411 PMAQI
27th Jul 2025362 PMAQI
27th Jul 2025343 PMAQI
27th Jul 2025344 PMAQI
27th Jul 2025315 PMAQI
27th Jul 2025316 PMAQI
27th Jul 2025407 PMAQI
27th Jul 2025428 PMAQI
27th Jul 2025429 PMAQI
27th Jul 20254410 PMAQI
27th Jul 20253811 PMAQI
28th Jul 20254012 AMAQI
28th Jul 2025421 AMAQI
28th Jul 2025402 AMAQI
28th Jul 2025413 AMAQI
28th Jul 2025414 AMAQI

23°C21/24°C

28th Jul 2025425 AMAQI
28th Jul 2025406 AMAQI
28th Jul 2025327 AMAQI
28th Jul 2025328 AMAQI
28th Jul 2025329 AMAQI
28th Jul 20253410 AMAQI
28th Jul 20254711 AMAQI
28th Jul 20253612 PMAQI
28th Jul 2025351 PMAQI
28th Jul 2025332 PMAQI
28th Jul 2025343 PMAQI
28th Jul 2025294 PMAQI
28th Jul 2025285 PMAQI
28th Jul 2025426 PMAQI
28th Jul 2025497 PMAQI
28th Jul 2025498 PMAQI
28th Jul 2025499 PMAQI
28th Jul 20254510 PMAQI
28th Jul 20254611 PMAQI
29th Jul 20254412 AMAQI
29th Jul 2025421 AMAQI
29th Jul 2025412 AMAQI
29th Jul 2025423 AMAQI
29th Jul 2025414 AMAQI

23°C22/23°C

29th Jul 2025415 AMAQI
29th Jul 2025406 AMAQI
29th Jul 2025387 AMAQI
29th Jul 2025508 AMAQI
29th Jul 2025529 AMAQI
29th Jul 20255910 AMAQI
29th Jul 20254711 AMAQI
29th Jul 20254512 PMAQI
29th Jul 2025421 PMAQI
29th Jul 2025402 PMAQI
29th Jul 2025413 PMAQI
29th Jul 2025414 PMAQI
29th Jul 2025565 PMAQI
29th Jul 2025586 PMAQI
29th Jul 2025617 PMAQI
29th Jul 2025578 PMAQI
29th Jul 2025549 PMAQI
29th Jul 20255110 PMAQI
29th Jul 20254611 PMAQI
30th Jul 20254512 AMAQI
30th Jul 2025441 AMAQI
30th Jul 2025432 AMAQI
30th Jul 2025463 AMAQI
30th Jul 2025474 AMAQI

24°C20/29°C

30th Jul 2025475 AMAQI
30th Jul 2025436 AMAQI
30th Jul 2025377 AMAQI
30th Jul 2025388 AMAQI
30th Jul 2025419 AMAQI
30th Jul 20254410 AMAQI
30th Jul 20254211 AMAQI
30th Jul 20254412 PMAQI
30th Jul 2025481 PMAQI
30th Jul 2025502 PMAQI
30th Jul 2025463 PMAQI
30th Jul 2025494 PMAQI
30th Jul 2025475 PMAQI
30th Jul 2025416 PMAQI
30th Jul 2025467 PMAQI
30th Jul 2025468 PMAQI
30th Jul 2025479 PMAQI
30th Jul 20254410 PMAQI
30th Jul 20254511 PMAQI
31st Jul 20254512 AMAQI
31st Jul 2025441 AMAQI
31st Jul 2025432 AMAQI
31st Jul 2025433 AMAQI
31st Jul 2025434 AMAQI

26°C22/32°C

31st Jul 2025435 AMAQI
31st Jul 2025436 AMAQI
31st Jul 2025437 AMAQI
31st Jul 2025438 AMAQI
31st Jul 2025529 AMAQI
31st Jul 20256010 AMAQI
31st Jul 20256111 AMAQI
31st Jul 20256412 PMAQI
31st Jul 2025621 PMAQI
31st Jul 2025582 PMAQI
31st Jul 2025573 PMAQI
31st Jul 2025574 PMAQI
31st Jul 2025595 PMAQI
31st Jul 2025526 PMAQI
31st Jul 2025567 PMAQI
31st Jul 2025588 PMAQI
31st Jul 2025619 PMAQI
31st Jul 20255910 PMAQI
31st Jul 20255811 PMAQI
1st Aug 20255812 AMAQI
1st Aug 2025571 AMAQI
1st Aug 2025542 AMAQI
1st Aug 2025553 AMAQI
1st Aug 2025544 AMAQI

25°C20/32°C

1st Aug 2025545 AMAQI
1st Aug 2025546 AMAQI
1st Aug 2025607 AMAQI
1st Aug 2025628 AMAQI
1st Aug 2025569 AMAQI
1st Aug 20255910 AMAQI
1st Aug 20255911 AMAQI
1st Aug 20256612 PMAQI
1st Aug 2025621 PMAQI
1st Aug 2025542 PMAQI
1st Aug 2025503 PMAQI
1st Aug 2025514 PMAQI
1st Aug 2025535 PMAQI
1st Aug 2025606 PMAQI
1st Aug 2025597 PMAQI
1st Aug 2025578 PMAQI
1st Aug 2025569 PMAQI
1st Aug 20255710 PMAQI
1st Aug 20255911 PMAQI
2nd Aug 20255812 AMAQI
2nd Aug 2025561 AMAQI
2nd Aug 2025562 AMAQI
2nd Aug 2025563 AMAQI
2nd Aug 2025554 AMAQI

24°C21/30°C

2nd Aug 2025565 AMAQI
5 AM
2nd Aug 2025566 AMAQI
2nd Aug 2025487 AMAQI
2nd Aug 2025508 AMAQI
2nd Aug 2025549 AMAQI
2nd Aug 20254810 AMAQI
2nd Aug 20255711 AMAQI
2nd Aug 20255212 PMAQI
12 PM
2nd Aug 2025421 PMAQI
2nd Aug 2025452 PMAQI
2nd Aug 2025463 PMAQI
2nd Aug 2025424 PMAQI
2nd Aug 2025465 PMAQI
2nd Aug 2025466 PMAQI
2nd Aug 2025507 PMAQI
7 PM
2nd Aug 2025538 PMAQI
2nd Aug 2025569 PMAQI
2nd Aug 20255210 PMAQI
12 AM
4 AM

--°C/°C

Day time
Avg. Highest Time
9 AM - 7 PM

45AQI

11 hours / Day
330 hours / Month
Avg. Lowest Time
7 AM - 8 AM

40AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 AM to 7 PM (Avg. 45), while the lowest AQI was between 7 AM to 8 AM (Avg. 40).
Night time
Avg. Highest Time
8 PM - 11 PM

49AQI

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

46AQI

5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 8 PM to 11 PM (Avg. 49), while the lowest AQI was between 12 AM to 4 AM (Avg. 46).

2025 Days Vs Air Quality

Koh Chang Maesai, Mae Sai, Chiang Rai, Thailand

2025

32%

69

31%

65

31%

66

6%

13

Total number of days with different AQI categories in last 214 days in 2025 (151 days remaining)

Good
69 Days
Moderate
65 Days
Poor
66 Days
Unhealthy
13 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 32%

Health Risk Level:

High

In 2025, 32% of 214 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

Koh Chang Maesai, Mae Sai, Chiang Rai, Thailand

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
92AQI
2nd January 2025
88AQI
3rd January 2025
78AQI
4th January 2025
83AQI
5th January 2025
94AQI
6th January 2025
110AQI
7th January 2025
116AQI
8th January 2025
112AQI
9th January 2025
119AQI
10th January 2025
115AQI
11th January 2025
107AQI
12th January 2025
96AQI
13th January 2025
90AQI
14th January 2025
96AQI
15th January 2025
105AQI
16th January 2025
102AQI
17th January 2025
96AQI
18th January 2025
98AQI
19th January 2025
99AQI
20th January 2025
107AQI
21st January 2025
121AQI
22nd January 2025
126AQI
23rd January 2025
125AQI
24th January 2025
108AQI
25th January 2025
104AQI
26th January 2025
99AQI
27th January 2025
81AQI
28th January 2025
81AQI
29th January 2025
96AQI
30th January 2025
116AQI
31st January 2025
106AQI
1st February 2025
100AQI
2nd February 2025
110AQI
3rd February 2025
109AQI
4th February 2025
117AQI
5th February 2025
118AQI
6th February 2025
116AQI
7th February 2025
108AQI
8th February 2025
109AQI
9th February 2025
92AQI
10th February 2025
106AQI
11th February 2025
111AQI
12th February 2025
113AQI
13th February 2025
104AQI
14th February 2025
108AQI
15th February 2025
101AQI
16th February 2025
127AQI
17th February 2025
125AQI
18th February 2025
127AQI
19th February 2025
120AQI
20th February 2025
118AQI
21st February 2025
112AQI
22nd February 2025
107AQI
23rd February 2025
102AQI
24th February 2025
83AQI
25th February 2025
72AQI
26th February 2025
61AQI
27th February 2025
67AQI
28th February 2025
72AQI
1st March 2025
78AQI
2nd March 2025
83AQI
3rd March 2025
98AQI
4th March 2025
114AQI
5th March 2025
132AQI
6th March 2025
130AQI
7th March 2025
140AQI
8th March 2025
118AQI
9th March 2025
111AQI
10th March 2025
103AQI
11th March 2025
113AQI
12th March 2025
121AQI
13th March 2025
108AQI
14th March 2025
118AQI
15th March 2025
131AQI
16th March 2025
132AQI
17th March 2025
143AQI
18th March 2025
130AQI
19th March 2025
87AQI
20th March 2025
90AQI
21st March 2025
102AQI
22nd March 2025
130AQI
23rd March 2025
139AQI
24th March 2025
151AQI
25th March 2025
155AQI
26th March 2025
157AQI
27th March 2025
159AQI
28th March 2025
164AQI
29th March 2025
163AQI
30th March 2025
164AQI
31st March 2025
159AQI
1st April 2025
152AQI
2nd April 2025
151AQI
3rd April 2025
151AQI
4th April 2025
154AQI
5th April 2025
154AQI
6th April 2025
149AQI
7th April 2025
127AQI
8th April 2025
125AQI
9th April 2025
140AQI
10th April 2025
141AQI
11th April 2025
146AQI
12th April 2025
118AQI
13th April 2025
84AQI
14th April 2025
69AQI
15th April 2025
61AQI
16th April 2025
59AQI
17th April 2025
60AQI
18th April 2025
59AQI
19th April 2025
63AQI
20th April 2025
66AQI
21st April 2025
70AQI
22nd April 2025
86AQI
23rd April 2025
89AQI
24th April 2025
103AQI
25th April 2025
109AQI
26th April 2025
114AQI
27th April 2025
111AQI
28th April 2025
82AQI
29th April 2025
75AQI
30th April 2025
67AQI
1st May 2025
55AQI
2nd May 2025
55AQI
3rd May 2025
51AQI
4th May 2025
55AQI
5th May 2025
59AQI
6th May 2025
62AQI
7th May 2025
70AQI
8th May 2025
75AQI
9th May 2025
64AQI
10th May 2025
70AQI
11th May 2025
70AQI
12th May 2025
49AQI
13th May 2025
54AQI
14th May 2025
57AQI
15th May 2025
39AQI
16th May 2025
40AQI
17th May 2025
42AQI
18th May 2025
34AQI
19th May 2025
36AQI
20th May 2025
42AQI
21st May 2025
48AQI
22nd May 2025
48AQI
23rd May 2025
49AQI
24th May 2025
42AQI
25th May 2025
37AQI
26th May 2025
34AQI
27th May 2025
43AQI
28th May 2025
36AQI
29th May 2025
41AQI
30th May 2025
40AQI
31st May 2025
36AQI
1st June 2025
40AQI
2nd June 2025
43AQI
3rd June 2025
47AQI
4th June 2025
53AQI
5th June 2025
54AQI
6th June 2025
60AQI
7th June 2025
61AQI
8th June 2025
57AQI
9th June 2025
57AQI
10th June 2025
48AQI
11th June 2025
38AQI
12th June 2025
44AQI
13th June 2025
45AQI
14th June 2025
46AQI
15th June 2025
43AQI
16th June 2025
38AQI
17th June 2025
42AQI
18th June 2025
45AQI
19th June 2025
45AQI
20th June 2025
48AQI
21st June 2025
51AQI
22nd June 2025
55AQI
23rd June 2025
48AQI
24th June 2025
48AQI
25th June 2025
48AQI
26th June 2025
50AQI
27th June 2025
46AQI
28th June 2025
46AQI
29th June 2025
47AQI
30th June 2025
49AQI
1st July 2025
50AQI
2nd July 2025
46AQI
3rd July 2025
51AQI
4th July 2025
48AQI
5th July 2025
47AQI
6th July 2025
41AQI
7th July 2025
40AQI
8th July 2025
43AQI
9th July 2025
50AQI
10th July 2025
49AQI
11th July 2025
47AQI
12th July 2025
45AQI
13th July 2025
46AQI
14th July 2025
47AQI
15th July 2025
44AQI
16th July 2025
45AQI
17th July 2025
48AQI
18th July 2025
45AQI
19th July 2025
49AQI
20th July 2025
43AQI
21st July 2025
49AQI
22nd July 2025
48AQI
23rd July 2025
42AQI
24th July 2025
39AQI
25th July 2025
39AQI
26th July 2025
42AQI
27th July 2025
40AQI
28th July 2025
40AQI
29th July 2025
47AQI
30th July 2025
45AQI
31st July 2025
53AQI
1st August 2025
57AQI

102AQI

104AQI

127AQI

105AQI

49AQI

48AQI

45AQI

57AQI

No. of days

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

202583AQI

15
16
7
21
5
18
8
14
11
5
18
13
22
8
29
2
1
69
65
66
13

Highest AQI recorded in

March

127AQI

Lowest AQI recorded in

July

45AQI

202455AQI

14
2
1
2
1
8
4
30
31
30
21
8
11
20
7
23
31
138
100
3
2
1

Highest AQI recorded in

April

226AQI

Lowest AQI recorded in

July

34AQI

202390AQI

2
1
28
3
30
4

Highest AQI recorded in

November

91AQI

Lowest AQI recorded in

December

90AQI

202289AQI

2
13
15
1
6
13
1
3
13
15
1
6
9
14
7
13
4
1
19
1
1
1
17
11
9
5
2
57
59
56
31

Highest AQI recorded in

March

140AQI

Lowest AQI recorded in

July

26AQI

202166AQI

3
20
8
4
18
6
8
14
1
1
1
1
6
3
25
6
26
4
20
7
13
12
5
18
2
3
8
103
93
33
14

Highest AQI recorded in

March

150AQI

Lowest AQI recorded in

August

36AQI

202071AQI

1
5
7
1
3
8
7
2
3
6
7
26
4
27
4
31
24
3
20
5
8
22
7
24
146
69
10
9
12
9

Highest AQI recorded in

March

319AQI

Lowest AQI recorded in

August

27AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2023(Avg.)
90AQI
Least Polluted Year Recorded
2024(Avg.)
55AQI

Koh Chang Maesai's annual 2025 AQI (83) shows an average percentage change of 14.7% (worsened AQI) compared to previous years: 2020 (71), 2021 (66), 2022 (89), 2023 (90), 2024 (55).