Dongtan Dong, Osan, Gyeonggi, South Korea 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+
September Air Quality Analysis
Dongtan Dong, Osan, Gyeonggi, South Korea
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
29th Sep 2022
143AQILowest AQI recorded on
25th Sep 2021
16AQISame Day Analysis (17th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 41 of Good air quality, showing improvement over 2023 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 17th Sep - 18th Sep 2025
Dongtan Dong, Osan, Gyeonggi, South Korea
AQI
Day
Night
.
6 AM17th Sep 2025
7 PM
5 AM18th Sep 2025
Day time
Avg. Highest Time
8AM17th Sep
53AQI
Avg. Lowest Time
4PM17th Sep
18AQI
Night time
Avg. Highest Time
2AM18th Sep
50AQI
Avg. Lowest Time
7PM17th Sep
22AQI
In the last 24 hours,
Dongtan Dong's AQI reached its highest point of 53 at 8 AM during the Day, while the lowest point, 18, was recorded at 4 PM during the Day between 17th Sep and 18th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Dongtan Dong, Osan, Gyeonggi, South Korea
AugSep
19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th
Day
Night
19th Aug 2025496 AMAQI
19th Aug 2025487 AMAQI
19th Aug 2025498 AMAQI
19th Aug 2025349 AMAQI
19th Aug 20253510 AMAQI
19th Aug 20253711 AMAQI
19th Aug 20254512 PMAQI
19th Aug 2025501 PMAQI
19th Aug 2025432 PMAQI
19th Aug 2025403 PMAQI
19th Aug 2025384 PMAQI
19th Aug 2025405 PMAQI
19th Aug 2025326 PMAQI
19th Aug 2025377 PMAQI
19th Aug 2025428 PMAQI
19th Aug 2025409 PMAQI
19th Aug 20254210 PMAQI
19th Aug 20254611 PMAQI
20th Aug 20254812 AMAQI
20th Aug 2025491 AMAQI
20th Aug 2025502 AMAQI
20th Aug 2025483 AMAQI
20th Aug 2025484 AMAQI
20th Aug 2025485 AMAQI
27°C24/31°C
20th Aug 2025476 AMAQI
20th Aug 2025477 AMAQI
20th Aug 2025488 AMAQI
20th Aug 2025349 AMAQI
20th Aug 20254010 AMAQI
20th Aug 20254211 AMAQI
20th Aug 20255012 PMAQI
20th Aug 2025461 PMAQI
20th Aug 2025422 PMAQI
20th Aug 2025413 PMAQI
20th Aug 2025554 PMAQI
20th Aug 2025375 PMAQI
20th Aug 2025446 PMAQI
20th Aug 2025487 PMAQI
20th Aug 2025508 PMAQI
20th Aug 2025489 PMAQI
20th Aug 20254810 PMAQI
20th Aug 20255111 PMAQI
21st Aug 20254912 AMAQI
21st Aug 2025471 AMAQI
21st Aug 2025482 AMAQI
21st Aug 2025493 AMAQI
21st Aug 2025484 AMAQI
21st Aug 2025485 AMAQI
27°C23/32°C
21st Aug 2025486 AMAQI
21st Aug 2025477 AMAQI
21st Aug 2025488 AMAQI
21st Aug 2025589 AMAQI
21st Aug 20255110 AMAQI
21st Aug 20254911 AMAQI
21st Aug 20254912 PMAQI
21st Aug 2025541 PMAQI
21st Aug 2025522 PMAQI
21st Aug 2025473 PMAQI
21st Aug 2025444 PMAQI
21st Aug 2025445 PMAQI
21st Aug 2025396 PMAQI
21st Aug 2025377 PMAQI
21st Aug 2025528 PMAQI
21st Aug 2025469 PMAQI
21st Aug 20254410 PMAQI
21st Aug 20254211 PMAQI
22nd Aug 20254312 AMAQI
22nd Aug 2025471 AMAQI
22nd Aug 2025492 AMAQI
22nd Aug 2025493 AMAQI
22nd Aug 2025504 AMAQI
22nd Aug 2025505 AMAQI
28°C25/33°C
22nd Aug 2025496 AMAQI
22nd Aug 2025507 AMAQI
22nd Aug 2025508 AMAQI
22nd Aug 2025459 AMAQI
22nd Aug 20254810 AMAQI
22nd Aug 20255311 AMAQI
22nd Aug 20255312 PMAQI
22nd Aug 2025591 PMAQI
22nd Aug 2025532 PMAQI
22nd Aug 2025523 PMAQI
22nd Aug 2025504 PMAQI
22nd Aug 2025365 PMAQI
22nd Aug 2025316 PMAQI
22nd Aug 2025467 PMAQI
22nd Aug 2025468 PMAQI
22nd Aug 2025449 PMAQI
22nd Aug 20254310 PMAQI
22nd Aug 20254411 PMAQI
23rd Aug 20254912 AMAQI
23rd Aug 2025481 AMAQI
23rd Aug 2025492 AMAQI
23rd Aug 2025493 AMAQI
23rd Aug 2025504 AMAQI
23rd Aug 2025515 AMAQI
28°C25/32°C
23rd Aug 2025516 AMAQI
23rd Aug 2025507 AMAQI
23rd Aug 2025508 AMAQI
23rd Aug 2025389 AMAQI
23rd Aug 20254210 AMAQI
23rd Aug 20254211 AMAQI
23rd Aug 20254512 PMAQI
23rd Aug 2025511 PMAQI
23rd Aug 2025542 PMAQI
23rd Aug 2025543 PMAQI
23rd Aug 2025554 PMAQI
23rd Aug 2025545 PMAQI
23rd Aug 2025546 PMAQI
23rd Aug 2025547 PMAQI
23rd Aug 2025548 PMAQI
23rd Aug 2025549 PMAQI
23rd Aug 20255410 PMAQI
23rd Aug 20255211 PMAQI
24th Aug 20255512 AMAQI
24th Aug 2025521 AMAQI
24th Aug 2025502 AMAQI
24th Aug 2025493 AMAQI
24th Aug 2025504 AMAQI
24th Aug 2025485 AMAQI
28°C24/33°C
24th Aug 2025486 AMAQI
24th Aug 2025487 AMAQI
24th Aug 2025498 AMAQI
24th Aug 2025569 AMAQI
24th Aug 20255610 AMAQI
24th Aug 20255711 AMAQI
24th Aug 20256412 PMAQI
24th Aug 2025651 PMAQI
24th Aug 2025642 PMAQI
24th Aug 2025603 PMAQI
24th Aug 2025564 PMAQI
24th Aug 2025545 PMAQI
24th Aug 2025456 PMAQI
24th Aug 2025527 PMAQI
24th Aug 2025548 PMAQI
24th Aug 2025529 PMAQI
24th Aug 20255210 PMAQI
24th Aug 20255011 PMAQI
25th Aug 20255112 AMAQI
25th Aug 2025501 AMAQI
25th Aug 2025512 AMAQI
25th Aug 2025503 AMAQI
25th Aug 2025524 AMAQI
25th Aug 2025525 AMAQI
29°C25/33°C
25th Aug 2025526 AMAQI
25th Aug 2025527 AMAQI
25th Aug 2025538 AMAQI
25th Aug 2025479 AMAQI
25th Aug 20254410 AMAQI
25th Aug 20254011 AMAQI
25th Aug 20254212 PMAQI
25th Aug 2025481 PMAQI
25th Aug 2025532 PMAQI
25th Aug 2025463 PMAQI
25th Aug 2025464 PMAQI
25th Aug 2025465 PMAQI
25th Aug 2025426 PMAQI
25th Aug 2025447 PMAQI
25th Aug 2025468 PMAQI
25th Aug 2025449 PMAQI
25th Aug 20254310 PMAQI
25th Aug 20253911 PMAQI
26th Aug 20254012 AMAQI
26th Aug 2025501 AMAQI
26th Aug 2025522 AMAQI
26th Aug 2025513 AMAQI
26th Aug 2025524 AMAQI
26th Aug 2025525 AMAQI
29°C25/34°C
26th Aug 2025526 AMAQI
26th Aug 2025527 AMAQI
26th Aug 2025528 AMAQI
26th Aug 2025369 AMAQI
26th Aug 20253810 AMAQI
26th Aug 20253411 AMAQI
26th Aug 20252812 PMAQI
26th Aug 2025401 PMAQI
26th Aug 2025392 PMAQI
26th Aug 2025363 PMAQI
26th Aug 2025404 PMAQI
26th Aug 2025405 PMAQI
26th Aug 2025426 PMAQI
26th Aug 2025367 PMAQI
26th Aug 2025488 PMAQI
26th Aug 2025439 PMAQI
26th Aug 20254710 PMAQI
26th Aug 20254611 PMAQI
27th Aug 20255212 AMAQI
27th Aug 2025521 AMAQI
27th Aug 2025512 AMAQI
27th Aug 2025513 AMAQI
27th Aug 2025494 AMAQI
27th Aug 2025485 AMAQI
26°C24/30°C
27th Aug 2025476 AMAQI
27th Aug 2025487 AMAQI
27th Aug 2025488 AMAQI
27th Aug 2025469 AMAQI
27th Aug 20255310 AMAQI
27th Aug 20255211 AMAQI
27th Aug 20255312 PMAQI
27th Aug 2025521 PMAQI
27th Aug 2025492 PMAQI
27th Aug 2025613 PMAQI
27th Aug 2025504 PMAQI
27th Aug 2025515 PMAQI
27th Aug 2025506 PMAQI
27th Aug 2025537 PMAQI
27th Aug 2025548 PMAQI
27th Aug 2025569 PMAQI
27th Aug 20255510 PMAQI
27th Aug 20255711 PMAQI
28th Aug 20255812 AMAQI
28th Aug 2025541 AMAQI
28th Aug 2025502 AMAQI
28th Aug 2025503 AMAQI
28th Aug 2025514 AMAQI
28th Aug 2025505 AMAQI
26°C22/32°C
28th Aug 2025516 AMAQI
28th Aug 2025507 AMAQI
28th Aug 2025508 AMAQI
28th Aug 2025509 AMAQI
28th Aug 20255010 AMAQI
28th Aug 20255211 AMAQI
28th Aug 20255512 PMAQI
28th Aug 2025601 PMAQI
28th Aug 2025562 PMAQI
28th Aug 2025563 PMAQI
28th Aug 2025524 PMAQI
28th Aug 2025545 PMAQI
28th Aug 2025526 PMAQI
28th Aug 2025497 PMAQI
28th Aug 2025518 PMAQI
28th Aug 2025509 PMAQI
28th Aug 20254910 PMAQI
28th Aug 20255011 PMAQI
29th Aug 20254912 AMAQI
29th Aug 2025511 AMAQI
29th Aug 2025522 AMAQI
29th Aug 2025523 AMAQI
29th Aug 2025524 AMAQI
29th Aug 2025525 AMAQI
27°C24/31°C
29th Aug 2025526 AMAQI
29th Aug 2025527 AMAQI
29th Aug 2025528 AMAQI
29th Aug 2025379 AMAQI
29th Aug 20253910 AMAQI
29th Aug 20254411 AMAQI
29th Aug 20254012 PMAQI
29th Aug 2025391 PMAQI
29th Aug 2025382 PMAQI
29th Aug 2025403 PMAQI
29th Aug 2025304 PMAQI
29th Aug 2025345 PMAQI
29th Aug 2025246 PMAQI
29th Aug 2025417 PMAQI
29th Aug 2025368 PMAQI
29th Aug 2025469 PMAQI
29th Aug 20254610 PMAQI
29th Aug 20254611 PMAQI
30th Aug 20255212 AMAQI
30th Aug 2025521 AMAQI
30th Aug 2025522 AMAQI
30th Aug 2025513 AMAQI
30th Aug 2025514 AMAQI
30th Aug 2025505 AMAQI
27°C24/32°C
30th Aug 2025516 AMAQI
30th Aug 2025517 AMAQI
30th Aug 2025508 AMAQI
30th Aug 2025249 AMAQI
30th Aug 20254410 AMAQI
30th Aug 20254711 AMAQI
30th Aug 20253712 PMAQI
30th Aug 2025401 PMAQI
30th Aug 2025342 PMAQI
30th Aug 2025283 PMAQI
30th Aug 2025364 PMAQI
30th Aug 2025245 PMAQI
30th Aug 2025306 PMAQI
30th Aug 2025407 PMAQI
30th Aug 2025378 PMAQI
30th Aug 2025409 PMAQI
30th Aug 20254010 PMAQI
30th Aug 20253811 PMAQI
31st Aug 20254112 AMAQI
31st Aug 2025511 AMAQI
31st Aug 2025512 AMAQI
31st Aug 2025523 AMAQI
31st Aug 2025504 AMAQI
31st Aug 2025495 AMAQI
27°C24/32°C
31st Aug 2025476 AMAQI
31st Aug 2025497 AMAQI
31st Aug 2025498 AMAQI
31st Aug 2025439 AMAQI
31st Aug 20254210 AMAQI
31st Aug 20254011 AMAQI
31st Aug 20254812 PMAQI
31st Aug 2025501 PMAQI
31st Aug 2025502 PMAQI
31st Aug 2025523 PMAQI
31st Aug 2025504 PMAQI
31st Aug 2025475 PMAQI
31st Aug 2025586 PMAQI
31st Aug 2025567 PMAQI
31st Aug 2025568 PMAQI
31st Aug 2025589 PMAQI
31st Aug 20255410 PMAQI
31st Aug 20255311 PMAQI
1st Sep 20255212 AMAQI
1st Sep 2025491 AMAQI
1st Sep 2025492 AMAQI
1st Sep 2025503 AMAQI
1st Sep 2025504 AMAQI
1st Sep 2025505 AMAQI
27°C23/33°C
1st Sep 2025506 AMAQI
1st Sep 2025507 AMAQI
1st Sep 2025528 AMAQI
1st Sep 2025259 AMAQI
1st Sep 20252210 AMAQI
1st Sep 20252011 AMAQI
1st Sep 20252512 PMAQI
1st Sep 2025251 PMAQI
1st Sep 2025302 PMAQI
1st Sep 2025383 PMAQI
1st Sep 2025364 PMAQI
1st Sep 2025225 PMAQI
1st Sep 2025306 PMAQI
1st Sep 2025417 PMAQI
1st Sep 2025358 PMAQI
1st Sep 2025419 PMAQI
1st Sep 20254410 PMAQI
1st Sep 20254311 PMAQI
2nd Sep 20254912 AMAQI
2nd Sep 2025521 AMAQI
2nd Sep 2025502 AMAQI
2nd Sep 2025503 AMAQI
2nd Sep 2025474 AMAQI
2nd Sep 2025465 AMAQI
25°C22/28°C
2nd Sep 2025466 AMAQI
2nd Sep 2025467 AMAQI
2nd Sep 2025458 AMAQI
2nd Sep 2025449 AMAQI
2nd Sep 20255010 AMAQI
2nd Sep 20254711 AMAQI
2nd Sep 20254812 PMAQI
2nd Sep 2025441 PMAQI
2nd Sep 2025412 PMAQI
2nd Sep 2025443 PMAQI
2nd Sep 2025544 PMAQI
2nd Sep 2025535 PMAQI
2nd Sep 2025556 PMAQI
2nd Sep 2025627 PMAQI
2nd Sep 2025508 PMAQI
2nd Sep 2025489 PMAQI
2nd Sep 20254910 PMAQI
2nd Sep 20255011 PMAQI
3rd Sep 20255212 AMAQI
3rd Sep 2025471 AMAQI
3rd Sep 2025482 AMAQI
3rd Sep 2025483 AMAQI
3rd Sep 2025484 AMAQI
3rd Sep 2025485 AMAQI
25°C22/30°C
3rd Sep 2025496 AMAQI
3rd Sep 2025497 AMAQI
3rd Sep 2025498 AMAQI
3rd Sep 2025579 AMAQI
3rd Sep 20255110 AMAQI
3rd Sep 20255611 AMAQI
3rd Sep 20255512 PMAQI
3rd Sep 2025541 PMAQI
3rd Sep 2025502 PMAQI
3rd Sep 2025483 PMAQI
3rd Sep 2025414 PMAQI
3rd Sep 2025475 PMAQI
3rd Sep 2025576 PMAQI
3rd Sep 2025527 PMAQI
3rd Sep 2025528 PMAQI
3rd Sep 2025499 PMAQI
3rd Sep 20254910 PMAQI
3rd Sep 20255111 PMAQI
4th Sep 20255312 AMAQI
4th Sep 2025471 AMAQI
4th Sep 2025492 AMAQI
4th Sep 2025503 AMAQI
4th Sep 2025514 AMAQI
4th Sep 2025515 AMAQI
26°C22/31°C
4th Sep 2025516 AMAQI
4th Sep 2025517 AMAQI
4th Sep 2025508 AMAQI
4th Sep 2025359 AMAQI
4th Sep 20253310 AMAQI
4th Sep 20252911 AMAQI
4th Sep 20252712 PMAQI
4th Sep 2025291 PMAQI
4th Sep 2025282 PMAQI
4th Sep 2025283 PMAQI
4th Sep 2025294 PMAQI
4th Sep 2025405 PMAQI
4th Sep 2025366 PMAQI
4th Sep 2025327 PMAQI
4th Sep 2025268 PMAQI
4th Sep 2025209 PMAQI
4th Sep 20251510 PMAQI
4th Sep 20251111 PMAQI
5th Sep 20251312 AMAQI
5th Sep 2025271 AMAQI
5th Sep 2025512 AMAQI
5th Sep 2025513 AMAQI
5th Sep 2025494 AMAQI
5th Sep 2025475 AMAQI
24°C22/28°C
5th Sep 2025476 AMAQI
5th Sep 2025487 AMAQI
5th Sep 2025478 AMAQI
5th Sep 2025289 AMAQI
5th Sep 20254010 AMAQI
5th Sep 20253411 AMAQI
5th Sep 20252612 PMAQI
5th Sep 2025301 PMAQI
5th Sep 2025302 PMAQI
5th Sep 2025363 PMAQI
5th Sep 2025364 PMAQI
5th Sep 2025305 PMAQI
5th Sep 2025346 PMAQI
5th Sep 2025347 PMAQI
5th Sep 2025448 PMAQI
5th Sep 2025529 PMAQI
5th Sep 20254410 PMAQI
5th Sep 20254311 PMAQI
6th Sep 20254412 AMAQI
6th Sep 2025371 AMAQI
6th Sep 2025402 AMAQI
6th Sep 2025383 AMAQI
6th Sep 2025404 AMAQI
6th Sep 2025405 AMAQI
27°C22/32°C
6th Sep 2025406 AMAQI
6th Sep 2025397 AMAQI
6th Sep 2025388 AMAQI
6th Sep 2025409 AMAQI
6th Sep 20255010 AMAQI
6th Sep 20254711 AMAQI
6th Sep 20254212 PMAQI
6th Sep 2025331 PMAQI
6th Sep 2025272 PMAQI
6th Sep 2025233 PMAQI
6th Sep 2025354 PMAQI
6th Sep 2025385 PMAQI
6th Sep 2025386 PMAQI
6th Sep 2025377 PMAQI
6th Sep 2025308 PMAQI
6th Sep 2025389 PMAQI
6th Sep 20254210 PMAQI
6th Sep 20253411 PMAQI
7th Sep 20253612 AMAQI
7th Sep 2025411 AMAQI
7th Sep 2025412 AMAQI
7th Sep 2025403 AMAQI
7th Sep 2025394 AMAQI
7th Sep 2025415 AMAQI
27°C24/31°C
7th Sep 2025416 AMAQI
7th Sep 2025427 AMAQI
7th Sep 2025428 AMAQI
7th Sep 2025329 AMAQI
7th Sep 20252310 AMAQI
7th Sep 20253211 AMAQI
7th Sep 20253412 PMAQI
7th Sep 2025401 PMAQI
7th Sep 2025482 PMAQI
7th Sep 2025523 PMAQI
7th Sep 2025504 PMAQI
7th Sep 2025525 PMAQI
7th Sep 2025436 PMAQI
7th Sep 2025507 PMAQI
7th Sep 2025438 PMAQI
7th Sep 2025429 PMAQI
7th Sep 20254210 PMAQI
7th Sep 20254311 PMAQI
8th Sep 20254012 AMAQI
8th Sep 2025381 AMAQI
8th Sep 2025392 AMAQI
8th Sep 2025393 AMAQI
8th Sep 2025384 AMAQI
8th Sep 2025395 AMAQI
25°C23/29°C
8th Sep 2025386 AMAQI
8th Sep 2025407 AMAQI
8th Sep 2025388 AMAQI
8th Sep 2025469 AMAQI
8th Sep 20255110 AMAQI
8th Sep 20254611 AMAQI
8th Sep 20255112 PMAQI
8th Sep 2025481 PMAQI
8th Sep 2025542 PMAQI
8th Sep 2025523 PMAQI
8th Sep 2025534 PMAQI
8th Sep 2025545 PMAQI
8th Sep 2025566 PMAQI
8th Sep 2025627 PMAQI
8th Sep 2025588 PMAQI
8th Sep 2025599 PMAQI
8th Sep 20255710 PMAQI
8th Sep 20255811 PMAQI
9th Sep 20255212 AMAQI
9th Sep 2025411 AMAQI
9th Sep 2025412 AMAQI
9th Sep 2025443 AMAQI
9th Sep 2025444 AMAQI
9th Sep 2025445 AMAQI
24°C21/29°C
9th Sep 2025436 AMAQI
9th Sep 2025427 AMAQI
9th Sep 2025438 AMAQI
9th Sep 2025579 AMAQI
9th Sep 20255410 AMAQI
9th Sep 20256111 AMAQI
9th Sep 20255612 PMAQI
9th Sep 2025561 PMAQI
9th Sep 2025632 PMAQI
9th Sep 2025613 PMAQI
9th Sep 2025584 PMAQI
9th Sep 2025585 PMAQI
9th Sep 2025656 PMAQI
9th Sep 2025727 PMAQI
9th Sep 2025668 PMAQI
9th Sep 2025629 PMAQI
9th Sep 20256010 PMAQI
9th Sep 20255611 PMAQI
10th Sep 20256012 AMAQI
10th Sep 2025491 AMAQI
10th Sep 2025452 AMAQI
10th Sep 2025473 AMAQI
10th Sep 2025504 AMAQI
10th Sep 2025525 AMAQI
24°C21/28°C
10th Sep 2025506 AMAQI
10th Sep 2025527 AMAQI
10th Sep 2025518 AMAQI
10th Sep 2025559 AMAQI
10th Sep 20255610 AMAQI
10th Sep 20255911 AMAQI
10th Sep 20255112 PMAQI
10th Sep 2025511 PMAQI
10th Sep 2025402 PMAQI
10th Sep 2025473 PMAQI
10th Sep 2025394 PMAQI
10th Sep 2025365 PMAQI
10th Sep 2025386 PMAQI
10th Sep 2025467 PMAQI
10th Sep 2025538 PMAQI
10th Sep 2025549 PMAQI
10th Sep 20255110 PMAQI
10th Sep 20255411 PMAQI
11th Sep 20255212 AMAQI
11th Sep 2025481 AMAQI
11th Sep 2025502 AMAQI
11th Sep 2025503 AMAQI
11th Sep 2025524 AMAQI
11th Sep 2025525 AMAQI
25°C21/31°C
11th Sep 2025516 AMAQI
11th Sep 2025527 AMAQI
11th Sep 2025528 AMAQI
11th Sep 2025499 AMAQI
11th Sep 20255010 AMAQI
11th Sep 20254311 AMAQI
11th Sep 20254412 PMAQI
11th Sep 2025311 PMAQI
11th Sep 2025262 PMAQI
11th Sep 2025393 PMAQI
11th Sep 2025334 PMAQI
11th Sep 2025385 PMAQI
11th Sep 2025416 PMAQI
11th Sep 2025467 PMAQI
11th Sep 2025558 PMAQI
11th Sep 2025569 PMAQI
11th Sep 20255610 PMAQI
11th Sep 20255511 PMAQI
12th Sep 20255412 AMAQI
12th Sep 2025521 AMAQI
12th Sep 2025522 AMAQI
12th Sep 2025503 AMAQI
12th Sep 2025504 AMAQI
12th Sep 2025505 AMAQI
26°C21/31°C
12th Sep 2025506 AMAQI
12th Sep 2025517 AMAQI
12th Sep 2025518 AMAQI
12th Sep 2025469 AMAQI
12th Sep 20253810 AMAQI
12th Sep 20254111 AMAQI
12th Sep 20254012 PMAQI
12th Sep 2025431 PMAQI
12th Sep 2025452 PMAQI
12th Sep 2025453 PMAQI
12th Sep 2025424 PMAQI
12th Sep 2025415 PMAQI
12th Sep 2025346 PMAQI
12th Sep 2025357 PMAQI
12th Sep 2025458 PMAQI
12th Sep 2025459 PMAQI
12th Sep 20254010 PMAQI
12th Sep 20253911 PMAQI
13th Sep 20254212 AMAQI
13th Sep 2025501 AMAQI
13th Sep 2025492 AMAQI
13th Sep 2025513 AMAQI
13th Sep 2025504 AMAQI
13th Sep 2025525 AMAQI
23°C20/27°C
13th Sep 2025506 AMAQI
13th Sep 2025507 AMAQI
13th Sep 2025508 AMAQI
13th Sep 2025179 AMAQI
13th Sep 20252110 AMAQI
13th Sep 20253011 AMAQI
13th Sep 20252412 PMAQI
13th Sep 2025181 PMAQI
13th Sep 2025192 PMAQI
13th Sep 2025223 PMAQI
13th Sep 2025284 PMAQI
13th Sep 2025265 PMAQI
13th Sep 2025306 PMAQI
13th Sep 2025277 PMAQI
13th Sep 2025388 PMAQI
13th Sep 2025419 PMAQI
13th Sep 20254110 PMAQI
13th Sep 20254411 PMAQI
14th Sep 20254412 AMAQI
14th Sep 2025501 AMAQI
14th Sep 2025492 AMAQI
14th Sep 2025483 AMAQI
14th Sep 2025464 AMAQI
14th Sep 2025465 AMAQI
22°C20/25°C
14th Sep 2025456 AMAQI
14th Sep 2025447 AMAQI
14th Sep 2025448 AMAQI
14th Sep 2025349 AMAQI
14th Sep 20253610 AMAQI
14th Sep 20252911 AMAQI
14th Sep 20253212 PMAQI
14th Sep 2025311 PMAQI
14th Sep 2025382 PMAQI
14th Sep 2025333 PMAQI
14th Sep 2025404 PMAQI
14th Sep 2025425 PMAQI
14th Sep 2025416 PMAQI
14th Sep 2025467 PMAQI
14th Sep 2025498 PMAQI
14th Sep 2025489 PMAQI
14th Sep 20254410 PMAQI
14th Sep 20254311 PMAQI
15th Sep 20254412 AMAQI
15th Sep 2025461 AMAQI
15th Sep 2025462 AMAQI
15th Sep 2025473 AMAQI
15th Sep 2025444 AMAQI
15th Sep 2025445 AMAQI
24°C21/28°C
15th Sep 2025446 AMAQI
15th Sep 2025447 AMAQI
15th Sep 2025448 AMAQI
15th Sep 2025559 AMAQI
15th Sep 20254410 AMAQI
15th Sep 20255011 AMAQI
15th Sep 20254412 PMAQI
15th Sep 2025501 PMAQI
15th Sep 2025382 PMAQI
15th Sep 2025363 PMAQI
15th Sep 2025484 PMAQI
15th Sep 2025475 PMAQI
15th Sep 2025526 PMAQI
15th Sep 2025587 PMAQI
15th Sep 2025548 PMAQI
15th Sep 2025549 PMAQI
15th Sep 20255510 PMAQI
15th Sep 20256011 PMAQI
16th Sep 20255512 AMAQI
16th Sep 2025461 AMAQI
16th Sep 2025452 AMAQI
16th Sep 2025463 AMAQI
16th Sep 2025464 AMAQI
16th Sep 2025465 AMAQI
25°C21/30°C
16th Sep 2025466 AMAQI
16th Sep 2025467 AMAQI
16th Sep 2025468 AMAQI
16th Sep 2025659 AMAQI
16th Sep 20256910 AMAQI
16th Sep 20256511 AMAQI
16th Sep 20256412 PMAQI
16th Sep 2025621 PMAQI
16th Sep 2025582 PMAQI
16th Sep 2025553 PMAQI
16th Sep 2025404 PMAQI
16th Sep 2025215 PMAQI
16th Sep 2025176 PMAQI
16th Sep 2025177 PMAQI
16th Sep 2025268 PMAQI
16th Sep 2025329 PMAQI
16th Sep 20253410 PMAQI
16th Sep 20253411 PMAQI
17th Sep 20254012 AMAQI
17th Sep 2025481 AMAQI
17th Sep 2025462 AMAQI
17th Sep 2025473 AMAQI
17th Sep 2025504 AMAQI
17th Sep 2025525 AMAQI
24°C22/28°C
17th Sep 2025526 AMAQI
17th Sep 2025527 AMAQI
17th Sep 2025538 AMAQI
17th Sep 2025359 AMAQI
17th Sep 20252610 AMAQI
17th Sep 20252811 AMAQI
17th Sep 20253212 PMAQI
17th Sep 2025281 PMAQI
17th Sep 2025222 PMAQI
17th Sep 2025203 PMAQI
17th Sep 2025184 PMAQI
17th Sep 2025265 PMAQI
17th Sep 2025246 PMAQI
17th Sep 2025227 PMAQI
17th Sep 2025388 PMAQI
17th Sep 2025419 PMAQI
17th Sep 20253710 PMAQI
17th Sep 20253511 PMAQI
18th Sep 20253712 AMAQI
18th Sep 2025491 AMAQI
18th Sep 2025502 AMAQI
18th Sep 2025503 AMAQI
18th Sep 2025484 AMAQI
18th Sep 2025465 AMAQI
22°C20/25°C
18th Sep 2025466 AMAQI
6 AM18th Sep 2025467 AMAQI
18th Sep 2025468 AMAQI
18th Sep 2025289 AMAQI
18th Sep 20252110 AMAQI
18th Sep 20252011 AMAQI
18th Sep 20251612 PMAQI
12 PM18th Sep 2025161 PMAQI
18th Sep 2025162 PMAQI
18th Sep 2025203 PMAQI
18th Sep 2025204 PMAQI
18th Sep 2025185 PMAQI
7 PM
12 AM
5 AM
--°C/°C
Day time
Avg. Highest Time
6 AM - 8 AM
48AQI
3 hours / Day
90 hours / Month
Avg. Lowest Time
5 PM - 6 PM
41AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 8 AM (Avg. 48), while the lowest AQI was between 5 PM to 6 PM (Avg. 41).
Night time
Avg. Highest Time
12 AM - 5 AM
48AQI
6 hours / Day
180 hours / Month
Avg. Lowest Time
8 PM - 11 PM
46AQI
4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 5 AM (Avg. 48), while the lowest AQI was between 8 PM to 11 PM (Avg. 46).
2025 Days Vs Air Quality
Dongtan Dong, Osan, Gyeonggi, South Korea
2025
25%
65
68%
176
7%
18
0.3%
1
Total number of days with different AQI categories in last 261 days in 2025 (104 days remaining)
Good
65 DaysModerate
176 DaysPoor
18 DaysUnhealthy
1 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 25%
Health Risk Level:
Very high
In 2025, 25% of 261 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
Dongtan Dong, Osan, Gyeonggi, South Korea
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
79AQI
79AQI
2nd January 2025
61AQI
61AQI
3rd January 2025
63AQI
63AQI
4th January 2025
67AQI
67AQI
5th January 2025
69AQI
69AQI
6th January 2025
99AQI
99AQI
7th January 2025
58AQI
58AQI
8th January 2025
73AQI
73AQI
9th January 2025
44AQI
44AQI
10th January 2025
59AQI
59AQI
11th January 2025
59AQI
59AQI
12th January 2025
81AQI
81AQI
13th January 2025
89AQI
89AQI
14th January 2025
103AQI
103AQI
15th January 2025
58AQI
58AQI
16th January 2025
78AQI
78AQI
17th January 2025
88AQI
88AQI
18th January 2025
84AQI
84AQI
19th January 2025
89AQI
89AQI
20th January 2025
131AQI
131AQI
21st January 2025
148AQI
148AQI
22nd January 2025
152AQI
152AQI
23rd January 2025
131AQI
131AQI
24th January 2025
104AQI
104AQI
25th January 2025
73AQI
73AQI
26th January 2025
56AQI
56AQI
27th January 2025
69AQI
69AQI
28th January 2025
57AQI
57AQI
29th January 2025
65AQI
65AQI
30th January 2025
54AQI
54AQI
31st January 2025
76AQI
76AQI
1st February 2025
74AQI
74AQI
2nd February 2025
88AQI
88AQI
3rd February 2025
56AQI
56AQI
4th February 2025
55AQI
55AQI
5th February 2025
47AQI
47AQI
6th February 2025
59AQI
59AQI
7th February 2025
51AQI
51AQI
8th February 2025
50AQI
50AQI
9th February 2025
51AQI
51AQI
10th February 2025
61AQI
61AQI
11th February 2025
71AQI
71AQI
12th February 2025
79AQI
79AQI
13th February 2025
54AQI
54AQI
14th February 2025
97AQI
97AQI
15th February 2025
59AQI
59AQI
16th February 2025
115AQI
115AQI
17th February 2025
56AQI
56AQI
18th February 2025
68AQI
68AQI
19th February 2025
50AQI
50AQI
20th February 2025
62AQI
62AQI
21st February 2025
58AQI
58AQI
22nd February 2025
61AQI
61AQI
23rd February 2025
57AQI
57AQI
24th February 2025
61AQI
61AQI
25th February 2025
60AQI
60AQI
26th February 2025
73AQI
73AQI
27th February 2025
62AQI
62AQI
28th February 2025
85AQI
85AQI
1st March 2025
103AQI
103AQI
2nd March 2025
76AQI
76AQI
3rd March 2025
57AQI
57AQI
4th March 2025
47AQI
47AQI
5th March 2025
39AQI
39AQI
6th March 2025
80AQI
80AQI
7th March 2025
97AQI
97AQI
8th March 2025
92AQI
92AQI
9th March 2025
111AQI
111AQI
10th March 2025
118AQI
118AQI
11th March 2025
112AQI
112AQI
12th March 2025
112AQI
112AQI
13th March 2025
101AQI
101AQI
14th March 2025
86AQI
86AQI
15th March 2025
63AQI
63AQI
16th March 2025
80AQI
80AQI
17th March 2025
67AQI
67AQI
18th March 2025
76AQI
76AQI
19th March 2025
85AQI
85AQI
20th March 2025
94AQI
94AQI
21st March 2025
110AQI
110AQI
22nd March 2025
110AQI
110AQI
23rd March 2025
121AQI
121AQI
24th March 2025
122AQI
122AQI
25th March 2025
136AQI
136AQI
26th March 2025
94AQI
94AQI
27th March 2025
98AQI
98AQI
28th March 2025
65AQI
65AQI
29th March 2025
56AQI
56AQI
30th March 2025
50AQI
50AQI
31st March 2025
65AQI
65AQI
1st April 2025
81AQI
81AQI
2nd April 2025
89AQI
89AQI
3rd April 2025
84AQI
84AQI
4th April 2025
90AQI
90AQI
5th April 2025
78AQI
78AQI
6th April 2025
75AQI
75AQI
7th April 2025
75AQI
75AQI
8th April 2025
81AQI
81AQI
9th April 2025
74AQI
74AQI
10th April 2025
81AQI
81AQI
11th April 2025
91AQI
91AQI
12th April 2025
70AQI
70AQI
13th April 2025
67AQI
67AQI
14th April 2025
48AQI
48AQI
15th April 2025
61AQI
61AQI
16th April 2025
66AQI
66AQI
17th April 2025
72AQI
72AQI
18th April 2025
90AQI
90AQI
19th April 2025
60AQI
60AQI
20th April 2025
68AQI
68AQI
21st April 2025
56AQI
56AQI
22nd April 2025
50AQI
50AQI
23rd April 2025
36AQI
36AQI
24th April 2025
68AQI
68AQI
25th April 2025
65AQI
65AQI
26th April 2025
60AQI
60AQI
27th April 2025
46AQI
46AQI
28th April 2025
61AQI
61AQI
29th April 2025
73AQI
73AQI
30th April 2025
60AQI
60AQI
1st May 2025
65AQI
65AQI
2nd May 2025
54AQI
54AQI
3rd May 2025
54AQI
54AQI
4th May 2025
52AQI
52AQI
5th May 2025
57AQI
57AQI
6th May 2025
46AQI
46AQI
7th May 2025
59AQI
59AQI
8th May 2025
69AQI
69AQI
9th May 2025
53AQI
53AQI
10th May 2025
65AQI
65AQI
11th May 2025
76AQI
76AQI
12th May 2025
76AQI
76AQI
13th May 2025
77AQI
77AQI
14th May 2025
77AQI
77AQI
15th May 2025
67AQI
67AQI
16th May 2025
54AQI
54AQI
17th May 2025
54AQI
54AQI
18th May 2025
61AQI
61AQI
19th May 2025
64AQI
64AQI
20th May 2025
40AQI
40AQI
21st May 2025
51AQI
51AQI
22nd May 2025
47AQI
47AQI
23rd May 2025
66AQI
66AQI
24th May 2025
50AQI
50AQI
25th May 2025
54AQI
54AQI
26th May 2025
65AQI
65AQI
27th May 2025
87AQI
87AQI
28th May 2025
92AQI
92AQI
29th May 2025
84AQI
84AQI
30th May 2025
77AQI
77AQI
31st May 2025
87AQI
87AQI
1st June 2025
91AQI
91AQI
2nd June 2025
104AQI
104AQI
3rd June 2025
83AQI
83AQI
4th June 2025
64AQI
64AQI
5th June 2025
63AQI
63AQI
6th June 2025
61AQI
61AQI
7th June 2025
72AQI
72AQI
8th June 2025
60AQI
60AQI
9th June 2025
66AQI
66AQI
10th June 2025
56AQI
56AQI
11th June 2025
54AQI
54AQI
12th June 2025
61AQI
61AQI
13th June 2025
81AQI
81AQI
14th June 2025
62AQI
62AQI
15th June 2025
59AQI
59AQI
16th June 2025
65AQI
65AQI
17th June 2025
66AQI
66AQI
18th June 2025
69AQI
69AQI
19th June 2025
66AQI
66AQI
20th June 2025
51AQI
51AQI
21st June 2025
61AQI
61AQI
22nd June 2025
71AQI
71AQI
23rd June 2025
73AQI
73AQI
24th June 2025
66AQI
66AQI
25th June 2025
54AQI
54AQI
26th June 2025
59AQI
59AQI
27th June 2025
67AQI
67AQI
28th June 2025
64AQI
64AQI
29th June 2025
52AQI
52AQI
30th June 2025
49AQI
49AQI
1st July 2025
47AQI
47AQI
2nd July 2025
45AQI
45AQI
3rd July 2025
53AQI
53AQI
4th July 2025
50AQI
50AQI
5th July 2025
51AQI
51AQI
6th July 2025
53AQI
53AQI
7th July 2025
64AQI
64AQI
8th July 2025
66AQI
66AQI
9th July 2025
58AQI
58AQI
10th July 2025
54AQI
54AQI
11th July 2025
52AQI
52AQI
12th July 2025
50AQI
50AQI
13th July 2025
61AQI
61AQI
14th July 2025
59AQI
59AQI
15th July 2025
46AQI
46AQI
16th July 2025
52AQI
52AQI
17th July 2025
44AQI
44AQI
18th July 2025
46AQI
46AQI
19th July 2025
40AQI
40AQI
20th July 2025
43AQI
43AQI
21st July 2025
43AQI
43AQI
22nd July 2025
41AQI
41AQI
23rd July 2025
45AQI
45AQI
24th July 2025
52AQI
52AQI
25th July 2025
57AQI
57AQI
26th July 2025
50AQI
50AQI
27th July 2025
46AQI
46AQI
28th July 2025
60AQI
60AQI
29th July 2025
67AQI
67AQI
30th July 2025
60AQI
60AQI
31st July 2025
59AQI
59AQI
1st August 2025
58AQI
58AQI
2nd August 2025
61AQI
61AQI
3rd August 2025
61AQI
61AQI
4th August 2025
49AQI
49AQI
5th August 2025
51AQI
51AQI
6th August 2025
45AQI
45AQI
7th August 2025
51AQI
51AQI
8th August 2025
56AQI
56AQI
9th August 2025
55AQI
55AQI
10th August 2025
55AQI
55AQI
11th August 2025
57AQI
57AQI
12th August 2025
50AQI
50AQI
13th August 2025
40AQI
40AQI
14th August 2025
43AQI
43AQI
15th August 2025
40AQI
40AQI
16th August 2025
38AQI
38AQI
17th August 2025
41AQI
41AQI
18th August 2025
50AQI
50AQI
19th August 2025
45AQI
45AQI
20th August 2025
46AQI
46AQI
21st August 2025
48AQI
48AQI
22nd August 2025
47AQI
47AQI
23rd August 2025
50AQI
50AQI
24th August 2025
53AQI
53AQI
25th August 2025
48AQI
48AQI
26th August 2025
44AQI
44AQI
27th August 2025
52AQI
52AQI
28th August 2025
53AQI
53AQI
29th August 2025
44AQI
44AQI
30th August 2025
43AQI
43AQI
31st August 2025
48AQI
48AQI
1st September 2025
41AQI
41AQI
2nd September 2025
49AQI
49AQI
3rd September 2025
50AQI
50AQI
4th September 2025
38AQI
38AQI
5th September 2025
33AQI
33AQI
6th September 2025
38AQI
38AQI
7th September 2025
41AQI
41AQI
8th September 2025
47AQI
47AQI
9th September 2025
55AQI
55AQI
10th September 2025
49AQI
49AQI
11th September 2025
47AQI
47AQI
12th September 2025
47AQI
47AQI
13th September 2025
37AQI
37AQI
14th September 2025
41AQI
41AQI
15th September 2025
48AQI
48AQI
16th September 2025
43AQI
43AQI
17th September 2025
41AQI
41AQI
18th September 2025
19th September 2025
20th September 2025
21st September 2025
22nd September 2025
23rd September 2025
24th September 2025
25th September 2025
26th September 2025
27th September 2025
28th September 2025
29th September 2025
30th September 2025
1st October 2025
2nd October 2025
3rd October 2025
4th October 2025
5th October 2025
6th October 2025
7th October 2025
8th October 2025
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
81AQI
65AQI
88AQI
69AQI
64AQI
66AQI
52AQI
49AQI
44AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202565AQI
1
24
5
1
3
24
1
3
17
11
4
26
4
27
1
28
1
14
17
19
12
16
1
65
176
18
1
Highest AQI recorded in
March88AQI
Lowest AQI recorded in
September44AQI
202461AQI
9
15
7
9
13
6
1
6
21
3
1
4
18
4
12
18
1
5
25
25
6
17
14
24
6
16
15
8
21
1
1
29
1
136
201
23
2
Highest AQI recorded in
March79AQI
Lowest AQI recorded in
July38AQI
202367AQI
10
12
6
3
2
18
4
4
2
16
13
3
21
5
1
7
22
2
5
25
15
14
2
21
10
14
15
1
14
15
2
13
14
2
11
13
6
1
117
195
43
9
Highest AQI recorded in
March94AQI
Lowest AQI recorded in
August45AQI
202266AQI
6
18
4
2
7
7
6
1
7
16
8
6
19
4
7
22
2
17
13
8
15
1
20
6
2
16
12
3
8
16
6
9
19
3
112
163
38
3
Highest AQI recorded in
February81AQI
Lowest AQI recorded in
August20AQI
202165AQI
11
17
3
10
11
5
2
3
17
9
1
1
9
19
2
9
17
3
1
1
3
24
3
15
16
17
14
27
3
19
11
1
9
16
3
2
13
10
8
145
175
37
5
2
1
Highest AQI recorded in
March96AQI
Lowest AQI recorded in
September33AQI
202070AQI
3
9
1
2
17
2
3
8
7
2
21
7
11
19
1
15
14
2
14
16
8
19
4
9
13
8
11
11
8
1
78
147
40
1
Highest AQI recorded in
June86AQI
Lowest AQI recorded in
September54AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2020(Avg.)
70AQILeast Polluted Year Recorded
2024(Avg.)
61AQIDongtan Dong's annual 2025 AQI (65) shows an average percentage change of -0.5% (improved AQI) compared to previous years: 2020 (70), 2021 (65), 2022 (66), 2023 (67), 2024 (61).
