Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

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+

August Air Quality Analysis

Osan, Gyeonggi, South Korea

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
24th Aug 2024
88AQI
Lowest AQI recorded on
2nd Aug 2022
22AQI

Same Day Analysis (8th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 32 of Good air quality, showing improvement over 2025 and 2024 on the same day.

Day & Night AQI Trend: 8th Aug - 9th Aug 2026

Osan, Gyeonggi, South Korea

AQI
Day
Night
.

5 AM8th Aug 2026

7 PM

4 AM9th Aug 2026

Day time
Avg. Highest Time
5AM8th Aug

46AQI

Avg. Lowest Time
2PM8th Aug

18AQI

Night time
Avg. Highest Time
8PM8th Aug

22AQI

Avg. Lowest Time
2AM9th Aug

16AQI

In the last 24 hours,

Osan's AQI reached its highest point of 46 at 5 AM during the Day, while the lowest point, 16, was recorded at 2 AM during the Night between 8th Aug and 9th Aug 2026.

Day & Night AQI Trend : Jul - Aug 2026

Osan, Gyeonggi, South Korea

JulAug
11th - 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 - 06th06th - 07th07th - 08th08th - 09th09th
Day
Night
11th Jul 2026335 AMAQI
11th Jul 2026336 AMAQI
11th Jul 2026327 AMAQI
11th Jul 2026348 AMAQI
11th Jul 2026359 AMAQI
11th Jul 20263410 AMAQI
11th Jul 20263011 AMAQI
11th Jul 20262712 PMAQI
11th Jul 2026241 PMAQI
11th Jul 2026242 PMAQI
11th Jul 2026243 PMAQI
11th Jul 2026274 PMAQI
11th Jul 2026315 PMAQI
11th Jul 2026316 PMAQI
11th Jul 2026317 PMAQI
11th Jul 2026298 PMAQI
11th Jul 2026669 PMAQI
11th Jul 20266310 PMAQI
11th Jul 20267011 PMAQI
12th Jul 20267912 AMAQI
12th Jul 2026761 AMAQI
12th Jul 2026692 AMAQI
12th Jul 2026703 AMAQI
12th Jul 2026604 AMAQI

27°C23/33°C

12th Jul 2026665 AMAQI
12th Jul 2026676 AMAQI
12th Jul 2026677 AMAQI
12th Jul 2026648 AMAQI
12th Jul 2026639 AMAQI
12th Jul 20265010 AMAQI
12th Jul 20264011 AMAQI
12th Jul 20264012 PMAQI
12th Jul 2026431 PMAQI
12th Jul 2026522 PMAQI
12th Jul 2026483 PMAQI
12th Jul 2026454 PMAQI
12th Jul 2026565 PMAQI
12th Jul 2026536 PMAQI
12th Jul 2026527 PMAQI
12th Jul 2026558 PMAQI
12th Jul 2026589 PMAQI
12th Jul 20265010 PMAQI
12th Jul 20264811 PMAQI
13th Jul 20264812 AMAQI
13th Jul 2026501 AMAQI
13th Jul 2026502 AMAQI
13th Jul 2026523 AMAQI
13th Jul 2026484 AMAQI

29°C24/35°C

13th Jul 2026475 AMAQI
13th Jul 2026476 AMAQI
13th Jul 2026417 AMAQI
13th Jul 2026348 AMAQI
13th Jul 2026389 AMAQI
13th Jul 20264710 AMAQI
13th Jul 20263211 AMAQI
13th Jul 20264212 PMAQI
13th Jul 2026371 PMAQI
13th Jul 2026352 PMAQI
13th Jul 2026383 PMAQI
13th Jul 2026294 PMAQI
13th Jul 2026315 PMAQI
13th Jul 2026316 PMAQI
13th Jul 2026287 PMAQI
13th Jul 2026268 PMAQI
13th Jul 2026289 PMAQI
13th Jul 20264210 PMAQI
13th Jul 20264311 PMAQI
14th Jul 20264212 AMAQI
14th Jul 2026371 AMAQI
14th Jul 2026402 AMAQI
14th Jul 2026323 AMAQI
14th Jul 2026284 AMAQI

29°C25/33°C

14th Jul 2026295 AMAQI
14th Jul 2026326 AMAQI
14th Jul 2026257 AMAQI
14th Jul 2026268 AMAQI
14th Jul 2026289 AMAQI
14th Jul 20263010 AMAQI
14th Jul 20262311 AMAQI
14th Jul 20262212 PMAQI
14th Jul 2026141 PMAQI
14th Jul 2026172 PMAQI
14th Jul 2026223 PMAQI
14th Jul 2026224 PMAQI
14th Jul 2026265 PMAQI
14th Jul 2026286 PMAQI
14th Jul 2026287 PMAQI
14th Jul 2026298 PMAQI
14th Jul 2026309 PMAQI
14th Jul 20263110 PMAQI
14th Jul 20263011 PMAQI
15th Jul 20263012 AMAQI
15th Jul 2026291 AMAQI
15th Jul 2026292 AMAQI
15th Jul 2026283 AMAQI
15th Jul 2026284 AMAQI

28°C25/33°C

15th Jul 2026335 AMAQI
15th Jul 2026596 AMAQI
15th Jul 2026517 AMAQI
15th Jul 2026308 AMAQI
15th Jul 2026389 AMAQI
15th Jul 20264310 AMAQI
15th Jul 20264211 AMAQI
15th Jul 20263612 PMAQI
15th Jul 2026491 PMAQI
15th Jul 2026452 PMAQI
15th Jul 2026443 PMAQI
15th Jul 2026444 PMAQI
15th Jul 2026475 PMAQI
15th Jul 2026476 PMAQI
15th Jul 2026447 PMAQI
15th Jul 2026568 PMAQI
15th Jul 2026579 PMAQI
15th Jul 20266010 PMAQI
15th Jul 20266311 PMAQI
16th Jul 20266112 AMAQI
16th Jul 2026631 AMAQI
16th Jul 2026612 AMAQI
16th Jul 2026613 AMAQI
16th Jul 2026644 AMAQI

25°C23/27°C

16th Jul 2026645 AMAQI
16th Jul 2026636 AMAQI
16th Jul 2026617 AMAQI
16th Jul 2026648 AMAQI
16th Jul 2026679 AMAQI
16th Jul 20267310 AMAQI
16th Jul 20267411 AMAQI
16th Jul 20268312 PMAQI
16th Jul 2026861 PMAQI
16th Jul 2026872 PMAQI
16th Jul 2026923 PMAQI
16th Jul 2026804 PMAQI
16th Jul 2026565 PMAQI
16th Jul 2026496 PMAQI
16th Jul 2026397 PMAQI
16th Jul 2026318 PMAQI
16th Jul 2026359 PMAQI
16th Jul 20263910 PMAQI
16th Jul 20264311 PMAQI
17th Jul 20264512 AMAQI
17th Jul 2026491 AMAQI
17th Jul 2026502 AMAQI
17th Jul 2026513 AMAQI
17th Jul 2026544 AMAQI

25°C21/31°C

17th Jul 2026595 AMAQI
17th Jul 2026576 AMAQI
17th Jul 2026577 AMAQI
17th Jul 2026588 AMAQI
17th Jul 2026679 AMAQI
17th Jul 20266710 AMAQI
17th Jul 20267011 AMAQI
17th Jul 20267312 PMAQI
17th Jul 2026761 PMAQI
17th Jul 2026802 PMAQI
17th Jul 2026843 PMAQI
17th Jul 2026824 PMAQI
17th Jul 2026835 PMAQI
17th Jul 2026886 PMAQI
17th Jul 2026907 PMAQI
17th Jul 20261028 PMAQI
17th Jul 20261069 PMAQI
17th Jul 202611310 PMAQI
17th Jul 202611611 PMAQI
18th Jul 202611012 AMAQI
18th Jul 2026961 AMAQI
18th Jul 2026722 AMAQI
18th Jul 2026583 AMAQI
18th Jul 2026454 AMAQI

25°C23/29°C

18th Jul 2026355 AMAQI
18th Jul 2026276 AMAQI
18th Jul 2026277 AMAQI
18th Jul 2026338 AMAQI
18th Jul 2026419 AMAQI
18th Jul 20265010 AMAQI
18th Jul 20264911 AMAQI
18th Jul 20264112 PMAQI
18th Jul 2026301 PMAQI
18th Jul 2026282 PMAQI
18th Jul 2026263 PMAQI
18th Jul 2026284 PMAQI
18th Jul 2026265 PMAQI
18th Jul 2026276 PMAQI
18th Jul 2026277 PMAQI
18th Jul 2026298 PMAQI
18th Jul 2026309 PMAQI
18th Jul 20262810 PMAQI
18th Jul 20263611 PMAQI
19th Jul 20263012 AMAQI
19th Jul 2026291 AMAQI
19th Jul 2026282 AMAQI
19th Jul 2026293 AMAQI
19th Jul 2026224 AMAQI

24°C22/26°C

19th Jul 2026265 AMAQI
19th Jul 2026356 AMAQI
19th Jul 2026467 AMAQI
19th Jul 2026548 AMAQI
19th Jul 2026539 AMAQI
19th Jul 20265010 AMAQI
19th Jul 20264611 AMAQI
19th Jul 20264612 PMAQI
19th Jul 2026381 PMAQI
19th Jul 2026302 PMAQI
19th Jul 2026283 PMAQI
19th Jul 2026264 PMAQI
19th Jul 2026315 PMAQI
19th Jul 2026336 PMAQI
19th Jul 2026287 PMAQI
19th Jul 2026248 PMAQI
19th Jul 2026339 PMAQI
19th Jul 20264010 PMAQI
19th Jul 20263611 PMAQI
20th Jul 20263212 AMAQI
20th Jul 2026321 AMAQI
20th Jul 2026362 AMAQI
20th Jul 2026303 AMAQI
20th Jul 2026434 AMAQI

24°C23/24°C

20th Jul 2026415 AMAQI
20th Jul 2026416 AMAQI
20th Jul 2026417 AMAQI
20th Jul 2026458 AMAQI
20th Jul 2026469 AMAQI
20th Jul 20264310 AMAQI
20th Jul 20262711 AMAQI
20th Jul 20262612 PMAQI
20th Jul 2026251 PMAQI
20th Jul 2026242 PMAQI
20th Jul 2026243 PMAQI
20th Jul 2026254 PMAQI
20th Jul 2026245 PMAQI
20th Jul 2026246 PMAQI
20th Jul 2026257 PMAQI
20th Jul 2026288 PMAQI
20th Jul 2026269 PMAQI
20th Jul 20262610 PMAQI
20th Jul 20262711 PMAQI
21st Jul 20262812 AMAQI
21st Jul 2026311 AMAQI
21st Jul 2026322 AMAQI
21st Jul 2026303 AMAQI
21st Jul 2026334 AMAQI

25°C22/29°C

21st Jul 2026345 AMAQI
21st Jul 2026356 AMAQI
21st Jul 2026277 AMAQI
21st Jul 2026258 AMAQI
21st Jul 2026299 AMAQI
21st Jul 20263210 AMAQI
21st Jul 20263411 AMAQI
21st Jul 2026441 PMAQI
21st Jul 2026412 PMAQI
21st Jul 2026343 PMAQI
21st Jul 2026254 PMAQI
21st Jul 2026235 PMAQI
21st Jul 2026226 PMAQI
21st Jul 2026747 PMAQI
21st Jul 2026248 PMAQI
21st Jul 2026369 PMAQI
21st Jul 20263610 PMAQI
21st Jul 20263911 PMAQI
22nd Jul 20263912 AMAQI
22nd Jul 2026381 AMAQI
22nd Jul 2026342 AMAQI
22nd Jul 2026263 AMAQI
22nd Jul 2026304 AMAQI

25°C23/28°C

22nd Jul 2026325 AMAQI
22nd Jul 2026286 AMAQI
22nd Jul 2026307 AMAQI
22nd Jul 2026298 AMAQI
22nd Jul 2026359 AMAQI
22nd Jul 20262810 AMAQI
22nd Jul 20263411 AMAQI
22nd Jul 20264212 PMAQI
22nd Jul 2026431 PMAQI
22nd Jul 2026542 PMAQI
22nd Jul 2026543 PMAQI
22nd Jul 2026544 PMAQI
22nd Jul 2026545 PMAQI
22nd Jul 2026486 PMAQI
22nd Jul 2026477 PMAQI
22nd Jul 2026528 PMAQI
22nd Jul 2026549 PMAQI
22nd Jul 20265110 PMAQI
22nd Jul 20265711 PMAQI
23rd Jul 20266012 AMAQI
23rd Jul 2026541 AMAQI
23rd Jul 2026542 AMAQI
23rd Jul 2026523 AMAQI
23rd Jul 2026524 AMAQI

26°C24/30°C

23rd Jul 2026515 AMAQI
23rd Jul 2026516 AMAQI
23rd Jul 2026467 AMAQI
23rd Jul 2026498 AMAQI
23rd Jul 2026489 AMAQI
23rd Jul 20264910 AMAQI
23rd Jul 20265611 AMAQI
23rd Jul 20265212 PMAQI
23rd Jul 2026531 PMAQI
23rd Jul 2026572 PMAQI
23rd Jul 2026593 PMAQI
23rd Jul 2026534 PMAQI
23rd Jul 2026535 PMAQI
23rd Jul 2026586 PMAQI
23rd Jul 2026607 PMAQI
23rd Jul 2026608 PMAQI
23rd Jul 2026669 PMAQI
23rd Jul 20266510 PMAQI
23rd Jul 20266111 PMAQI
24th Jul 20265212 AMAQI
24th Jul 2026521 AMAQI
24th Jul 2026442 AMAQI
24th Jul 2026473 AMAQI
24th Jul 2026494 AMAQI

26°C23/29°C

24th Jul 2026475 AMAQI
24th Jul 2026446 AMAQI
24th Jul 2026467 AMAQI
24th Jul 2026508 AMAQI
24th Jul 2026499 AMAQI
24th Jul 20265210 AMAQI
24th Jul 20265011 AMAQI
24th Jul 20264712 PMAQI
24th Jul 2026501 PMAQI
24th Jul 2026502 PMAQI
24th Jul 2026433 PMAQI
24th Jul 2026464 PMAQI
24th Jul 2026445 PMAQI
24th Jul 2026416 PMAQI
24th Jul 2026347 PMAQI
24th Jul 2026378 PMAQI
24th Jul 2026389 PMAQI
24th Jul 20263510 PMAQI
24th Jul 20263411 PMAQI
25th Jul 20262912 AMAQI
25th Jul 2026281 AMAQI
25th Jul 2026302 AMAQI
25th Jul 2026323 AMAQI
25th Jul 2026294 AMAQI

27°C23/31°C

25th Jul 2026305 AMAQI
25th Jul 2026306 AMAQI
25th Jul 2026307 AMAQI
25th Jul 2026318 AMAQI
25th Jul 2026299 AMAQI
25th Jul 20262810 AMAQI
25th Jul 20262711 AMAQI
25th Jul 20262712 PMAQI
25th Jul 2026301 PMAQI
25th Jul 2026302 PMAQI
25th Jul 2026403 PMAQI
25th Jul 2026334 PMAQI
25th Jul 2026295 PMAQI
25th Jul 2026256 PMAQI
25th Jul 2026247 PMAQI
25th Jul 2026258 PMAQI
25th Jul 2026269 PMAQI
25th Jul 20262610 PMAQI
25th Jul 20262511 PMAQI
26th Jul 20262212 AMAQI
26th Jul 2026241 AMAQI
26th Jul 2026232 AMAQI
26th Jul 2026243 AMAQI
26th Jul 2026224 AMAQI

27°C24/31°C

26th Jul 2026225 AMAQI
26th Jul 2026236 AMAQI
26th Jul 2026237 AMAQI
26th Jul 2026248 AMAQI
26th Jul 2026249 AMAQI
26th Jul 20262510 AMAQI
26th Jul 20262711 AMAQI
26th Jul 20262912 PMAQI
26th Jul 2026291 PMAQI
26th Jul 2026272 PMAQI
26th Jul 2026263 PMAQI
26th Jul 2026224 PMAQI
26th Jul 2026255 PMAQI
26th Jul 2026366 PMAQI
26th Jul 2026337 PMAQI
26th Jul 2026238 PMAQI
26th Jul 2026239 PMAQI
26th Jul 20262310 PMAQI
26th Jul 20263211 PMAQI
27th Jul 20263112 AMAQI
27th Jul 2026241 AMAQI
27th Jul 2026232 AMAQI
27th Jul 2026263 AMAQI
27th Jul 2026274 AMAQI

27°C24/31°C

27th Jul 2026285 AMAQI
27th Jul 2026256 AMAQI
27th Jul 2026257 AMAQI
27th Jul 2026258 AMAQI
27th Jul 2026259 AMAQI
27th Jul 20262610 AMAQI
27th Jul 20262611 AMAQI
27th Jul 20263112 PMAQI
27th Jul 2026261 PMAQI
27th Jul 2026262 PMAQI
27th Jul 2026263 PMAQI
27th Jul 2026304 PMAQI
27th Jul 2026285 PMAQI
27th Jul 2026316 PMAQI
27th Jul 2026457 PMAQI
27th Jul 2026358 PMAQI
27th Jul 2026329 PMAQI
27th Jul 20262410 PMAQI
27th Jul 20262411 PMAQI
28th Jul 20262412 AMAQI
28th Jul 2026241 AMAQI
28th Jul 2026232 AMAQI
28th Jul 2026293 AMAQI
28th Jul 2026304 AMAQI

28°C24/32°C

28th Jul 2026265 AMAQI
28th Jul 2026266 AMAQI
28th Jul 2026267 AMAQI
28th Jul 2026278 AMAQI
28th Jul 2026339 AMAQI
28th Jul 20264010 AMAQI
28th Jul 20264611 AMAQI
28th Jul 20264812 PMAQI
28th Jul 2026521 PMAQI
28th Jul 2026542 PMAQI
28th Jul 2026573 PMAQI
28th Jul 2026604 PMAQI
28th Jul 2026615 PMAQI
28th Jul 2026546 PMAQI
28th Jul 2026587 PMAQI
28th Jul 2026598 PMAQI
28th Jul 2026559 PMAQI
28th Jul 20265210 PMAQI
28th Jul 20263911 PMAQI
29th Jul 20263312 AMAQI
29th Jul 2026311 AMAQI
29th Jul 2026322 AMAQI
29th Jul 2026303 AMAQI
29th Jul 2026304 AMAQI

27°C25/30°C

29th Jul 2026295 AMAQI
29th Jul 2026296 AMAQI
29th Jul 2026267 AMAQI
29th Jul 2026248 AMAQI
29th Jul 2026229 AMAQI
29th Jul 20262010 AMAQI
29th Jul 20262311 AMAQI
29th Jul 20262212 PMAQI
29th Jul 2026201 PMAQI
29th Jul 2026192 PMAQI
29th Jul 2026213 PMAQI
29th Jul 2026244 PMAQI
29th Jul 2026215 PMAQI
29th Jul 2026226 PMAQI
29th Jul 2026277 PMAQI
29th Jul 2026248 PMAQI
29th Jul 2026229 PMAQI
29th Jul 20262310 PMAQI
29th Jul 20262411 PMAQI
30th Jul 20262212 AMAQI
30th Jul 2026251 AMAQI
30th Jul 2026252 AMAQI
30th Jul 2026223 AMAQI
30th Jul 2026234 AMAQI

26°C24/30°C

30th Jul 2026245 AMAQI
30th Jul 2026276 AMAQI
30th Jul 2026317 AMAQI
30th Jul 2026308 AMAQI
30th Jul 2026329 AMAQI
30th Jul 20263010 AMAQI
30th Jul 20263011 AMAQI
30th Jul 20262512 PMAQI
30th Jul 2026211 PMAQI
30th Jul 2026242 PMAQI
30th Jul 2026233 PMAQI
30th Jul 2026234 PMAQI
30th Jul 2026265 PMAQI
30th Jul 2026256 PMAQI
30th Jul 2026277 PMAQI
30th Jul 2026288 PMAQI
30th Jul 2026249 PMAQI
30th Jul 20262510 PMAQI
30th Jul 20263511 PMAQI
31st Jul 20263112 AMAQI
31st Jul 2026271 AMAQI
31st Jul 2026242 AMAQI
31st Jul 2026263 AMAQI
31st Jul 2026354 AMAQI

26°C23/31°C

31st Jul 2026335 AMAQI
31st Jul 2026276 AMAQI
31st Jul 2026347 AMAQI
31st Jul 2026328 AMAQI
31st Jul 2026349 AMAQI
31st Jul 20265310 AMAQI
31st Jul 20263411 AMAQI
31st Jul 20264412 PMAQI
31st Jul 2026531 PMAQI
31st Jul 2026562 PMAQI
31st Jul 2026583 PMAQI
31st Jul 2026574 PMAQI
31st Jul 2026565 PMAQI
31st Jul 2026566 PMAQI
31st Jul 2026517 PMAQI
31st Jul 2026518 PMAQI
31st Jul 2026489 PMAQI
31st Jul 20266110 PMAQI
31st Jul 20265811 PMAQI
1st Aug 20266012 AMAQI
1st Aug 2026681 AMAQI
1st Aug 2026692 AMAQI
1st Aug 2026683 AMAQI
1st Aug 2026814 AMAQI

27°C23/32°C

1st Aug 2026785 AMAQI
1st Aug 2026806 AMAQI
1st Aug 2026837 AMAQI
1st Aug 2026898 AMAQI
1st Aug 2026829 AMAQI
1st Aug 20268210 AMAQI
1st Aug 20268811 AMAQI
1st Aug 20268012 PMAQI
1st Aug 2026601 PMAQI
1st Aug 2026422 PMAQI
1st Aug 2026543 PMAQI
1st Aug 2026574 PMAQI
1st Aug 2026585 PMAQI
1st Aug 2026626 PMAQI
1st Aug 2026637 PMAQI
1st Aug 2026638 PMAQI
1st Aug 2026639 PMAQI
1st Aug 20266510 PMAQI
1st Aug 20266711 PMAQI
2nd Aug 20266212 AMAQI
2nd Aug 2026601 AMAQI
2nd Aug 2026562 AMAQI
2nd Aug 2026563 AMAQI
2nd Aug 2026434 AMAQI

28°C25/32°C

2nd Aug 2026475 AMAQI
2nd Aug 2026526 AMAQI
2nd Aug 2026527 AMAQI
2nd Aug 2026468 AMAQI
2nd Aug 2026429 AMAQI
2nd Aug 20264710 AMAQI
2nd Aug 20266111 AMAQI
2nd Aug 20265912 PMAQI
2nd Aug 2026531 PMAQI
2nd Aug 2026522 PMAQI
2nd Aug 2026433 PMAQI
2nd Aug 2026384 PMAQI
2nd Aug 2026405 PMAQI
2nd Aug 2026366 PMAQI
2nd Aug 2026347 PMAQI
2nd Aug 2026348 PMAQI
2nd Aug 2026349 PMAQI
2nd Aug 20263010 PMAQI
2nd Aug 20263011 PMAQI
3rd Aug 20263412 AMAQI
3rd Aug 2026411 AMAQI
3rd Aug 2026422 AMAQI
3rd Aug 2026373 AMAQI
3rd Aug 2026404 AMAQI

28°C24/32°C

3rd Aug 2026415 AMAQI
3rd Aug 2026426 AMAQI
3rd Aug 2026417 AMAQI
3rd Aug 2026498 AMAQI
3rd Aug 2026499 AMAQI
3rd Aug 20264910 AMAQI
3rd Aug 20264711 AMAQI
3rd Aug 20265312 PMAQI
3rd Aug 2026561 PMAQI
3rd Aug 2026562 PMAQI
3rd Aug 2026523 PMAQI
3rd Aug 2026514 PMAQI
3rd Aug 2026485 PMAQI
3rd Aug 2026586 PMAQI
3rd Aug 2026667 PMAQI
3rd Aug 2026718 PMAQI
3rd Aug 2026689 PMAQI
3rd Aug 20266610 PMAQI
3rd Aug 20266211 PMAQI
4th Aug 20265612 AMAQI
4th Aug 2026611 AMAQI
4th Aug 2026622 AMAQI
4th Aug 2026593 AMAQI
4th Aug 2026594 AMAQI

28°C24/34°C

4th Aug 2026585 AMAQI
4th Aug 2026656 AMAQI
4th Aug 2026737 AMAQI
4th Aug 2026768 AMAQI
4th Aug 2026759 AMAQI
4th Aug 20266410 AMAQI
4th Aug 20265711 AMAQI
4th Aug 20265712 PMAQI
4th Aug 2026671 PMAQI
4th Aug 2026692 PMAQI
4th Aug 2026613 PMAQI
4th Aug 2026594 PMAQI
4th Aug 2026615 PMAQI
4th Aug 2026626 PMAQI
4th Aug 2026747 PMAQI
4th Aug 2026858 PMAQI
4th Aug 2026799 PMAQI
4th Aug 20266710 PMAQI
4th Aug 20266211 PMAQI
5th Aug 20265012 AMAQI
5th Aug 2026371 AMAQI
5th Aug 2026312 AMAQI
5th Aug 2026283 AMAQI
5th Aug 2026244 AMAQI

29°C25/35°C

5th Aug 2026285 AMAQI
5th Aug 2026266 AMAQI
5th Aug 2026287 AMAQI
5th Aug 2026388 AMAQI
5th Aug 2026299 AMAQI
5th Aug 20262310 AMAQI
5th Aug 20262311 AMAQI
5th Aug 20262112 PMAQI
5th Aug 2026231 PMAQI
5th Aug 2026262 PMAQI
5th Aug 2026333 PMAQI
5th Aug 2026334 PMAQI
5th Aug 2026345 PMAQI
5th Aug 2026366 PMAQI
5th Aug 2026367 PMAQI
5th Aug 2026398 PMAQI
5th Aug 2026469 PMAQI
5th Aug 20265210 PMAQI
5th Aug 20265911 PMAQI
6th Aug 20266612 AMAQI
6th Aug 2026701 AMAQI
6th Aug 2026752 AMAQI
6th Aug 2026693 AMAQI
6th Aug 2026704 AMAQI

29°C25/34°C

6th Aug 2026725 AMAQI
6th Aug 2026626 AMAQI
6th Aug 2026637 AMAQI
6th Aug 2026698 AMAQI
6th Aug 2026489 AMAQI
6th Aug 20264010 AMAQI
6th Aug 20263311 AMAQI
6th Aug 20262612 PMAQI
6th Aug 2026311 PMAQI
6th Aug 2026342 PMAQI
6th Aug 2026313 PMAQI
6th Aug 2026374 PMAQI
6th Aug 2026365 PMAQI
6th Aug 2026356 PMAQI
6th Aug 2026367 PMAQI
6th Aug 2026448 PMAQI
6th Aug 2026469 PMAQI
6th Aug 20265410 PMAQI
6th Aug 20267111 PMAQI
7th Aug 20267812 AMAQI
7th Aug 2026741 AMAQI
7th Aug 2026742 AMAQI
7th Aug 2026753 AMAQI
7th Aug 2026684 AMAQI

30°C26/35°C

7th Aug 2026645 AMAQI
7th Aug 2026556 AMAQI
7th Aug 2026547 AMAQI
7th Aug 2026508 AMAQI
7th Aug 2026499 AMAQI
7th Aug 20264710 AMAQI
7th Aug 20264911 AMAQI
7th Aug 20264812 PMAQI
7th Aug 2026611 PMAQI
7th Aug 2026372 PMAQI
7th Aug 2026373 PMAQI
7th Aug 2026364 PMAQI
7th Aug 2026395 PMAQI
7th Aug 2026366 PMAQI
7th Aug 2026397 PMAQI
7th Aug 2026478 PMAQI
7th Aug 2026619 PMAQI
7th Aug 20267710 PMAQI
7th Aug 20266811 PMAQI
8th Aug 20267012 AMAQI
8th Aug 2026681 AMAQI
8th Aug 2026632 AMAQI
8th Aug 2026543 AMAQI
8th Aug 2026504 AMAQI

30°C25/35°C

8th Aug 2026465 AMAQI
8th Aug 2026406 AMAQI
8th Aug 2026327 AMAQI
8th Aug 2026258 AMAQI
8th Aug 2026289 AMAQI
8th Aug 20262410 AMAQI
8th Aug 20261911 AMAQI
8th Aug 20262112 PMAQI
8th Aug 2026181 PMAQI
8th Aug 2026182 PMAQI
8th Aug 2026193 PMAQI
8th Aug 2026214 PMAQI
8th Aug 2026225 PMAQI
8th Aug 2026266 PMAQI
8th Aug 2026267 PMAQI
8th Aug 2026228 PMAQI
8th Aug 2026219 PMAQI
8th Aug 20261610 PMAQI
8th Aug 20261811 PMAQI
9th Aug 20261912 AMAQI
9th Aug 2026171 AMAQI
9th Aug 2026162 AMAQI
9th Aug 2026193 AMAQI
9th Aug 2026184 AMAQI

29°C23/35°C

9th Aug 2026185 AMAQI
5 AM
9th Aug 2026186 AMAQI
9th Aug 2026167 AMAQI
9th Aug 2026158 AMAQI
9th Aug 2026179 AMAQI
9th Aug 20261710 AMAQI
9th Aug 20261511 AMAQI
9th Aug 20261412 PMAQI
12 PM
9th Aug 2026141 PMAQI
9th Aug 2026152 PMAQI
9th Aug 2026173 PMAQI
9th Aug 2026164 PMAQI
9th Aug 2026185 PMAQI
9th Aug 2026186 PMAQI
9th Aug 2026167 PMAQI
7 PM
9th Aug 2026148 PMAQI
9th Aug 2026149 PMAQI
9th Aug 20262010 PMAQI
9th Aug 20262111 PMAQI
12 AM
4 AM

26°C22/31°C

Day time
Avg. Highest Time
5 AM - 10 AM

42AQI

6 hours / Day
180 hours / Month
Avg. Lowest Time
4 PM - 6 PM

40AQI

3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 10 AM (Avg. 42), while the lowest AQI was between 4 PM to 6 PM (Avg. 40).
Night time
Avg. Highest Time
11 PM

47AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
2 AM - 8 PM

42AQI

4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 11 PM to 11 PM (Avg. 47), while the lowest AQI was between 2 AM to 8 PM (Avg. 42).

2026 Days Vs Air Quality

Osan, Gyeonggi, South Korea

2026

45%

97

45%

98

10%

21

0.4%

1

Total number of days with different AQI categories in last 221 days in 2026 (144 days remaining)

Good
97 Days
Moderate
98 Days
Poor
21 Days
Unhealthy
1 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 45%

Health Risk Level:

Significant

In 2026, 45% of 221 days were within WHO’s safe air quality limits, and 55% exceeded them. The risk of health issues is Significant, especially for those with existing respiratory or heart conditions.

Annual Air Quality Insights

Osan, Gyeonggi, South Korea

AQI levels in 2026

AQI (US)
PM₂.₅
PM₁₀
CO
SO₂
NO₂
O₃
Sun.Mon.Tue.Wed.Thu.Fri.Sat.

Jan.

Feb.

Mar.

Apr.

May

Jun.

Jul.

Aug.

Sep.

Oct.

Nov.

Dec.

-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
1st January 2026
34AQI (US)
2nd January 2026
40AQI (US)
3rd January 2026
60AQI (US)
4th January 2026
78AQI (US)
5th January 2026
64AQI (US)
6th January 2026
60AQI (US)
7th January 2026
59AQI (US)
8th January 2026
28AQI (US)
9th January 2026
45AQI (US)
10th January 2026
66AQI (US)
11th January 2026
31AQI (US)
12th January 2026
42AQI (US)
13th January 2026
43AQI (US)
14th January 2026
33AQI (US)
15th January 2026
93AQI (US)
16th January 2026
134AQI (US)
17th January 2026
130AQI (US)
18th January 2026
100AQI (US)
19th January 2026
64AQI (US)
20th January 2026
39AQI (US)
21st January 2026
40AQI (US)
22nd January 2026
34AQI (US)
23rd January 2026
58AQI (US)
24th January 2026
61AQI (US)
25th January 2026
28AQI (US)
26th January 2026
54AQI (US)
27th January 2026
60AQI (US)
28th January 2026
36AQI (US)
29th January 2026
48AQI (US)
30th January 2026
56AQI (US)
31st January 2026
65AQI (US)
1st February 2026
71AQI (US)
2nd February 2026
72AQI (US)
3rd February 2026
62AQI (US)
4th February 2026
120AQI (US)
5th February 2026
138AQI (US)
6th February 2026
65AQI (US)
7th February 2026
40AQI (US)
8th February 2026
45AQI (US)
9th February 2026
50AQI (US)
10th February 2026
87AQI (US)
11th February 2026
119AQI (US)
12th February 2026
121AQI (US)
13th February 2026
138AQI (US)
14th February 2026
151AQI (US)
15th February 2026
120AQI (US)
16th February 2026
49AQI (US)
17th February 2026
53AQI (US)
18th February 2026
52AQI (US)
19th February 2026
49AQI (US)
20th February 2026
84AQI (US)
21st February 2026
96AQI (US)
22nd February 2026
54AQI (US)
23rd February 2026
29AQI (US)
24th February 2026
36AQI (US)
25th February 2026
45AQI (US)
26th February 2026
34AQI (US)
27th February 2026
26AQI (US)
28th February 2026
40AQI (US)
1st March 2026
36AQI (US)
2nd March 2026
16AQI (US)
3rd March 2026
30AQI (US)
4th March 2026
64AQI (US)
5th March 2026
100AQI (US)
6th March 2026
70AQI (US)
7th March 2026
56AQI (US)
8th March 2026
57AQI (US)
9th March 2026
95AQI (US)
10th March 2026
110AQI (US)
11th March 2026
92AQI (US)
12th March 2026
111AQI (US)
13th March 2026
41AQI (US)
14th March 2026
50AQI (US)
15th March 2026
93AQI (US)
16th March 2026
131AQI (US)
17th March 2026
131AQI (US)
18th March 2026
116AQI (US)
19th March 2026
57AQI (US)
20th March 2026
64AQI (US)
21st March 2026
100AQI (US)
22nd March 2026
83AQI (US)
23rd March 2026
120AQI (US)
24th March 2026
103AQI (US)
25th March 2026
90AQI (US)
26th March 2026
117AQI (US)
27th March 2026
127AQI (US)
28th March 2026
113AQI (US)
29th March 2026
94AQI (US)
30th March 2026
86AQI (US)
31st March 2026
52AQI (US)
1st April 2026
57AQI (US)
2nd April 2026
99AQI (US)
3rd April 2026
120AQI (US)
4th April 2026
57AQI (US)
5th April 2026
82AQI (US)
6th April 2026
54AQI (US)
7th April 2026
27AQI (US)
8th April 2026
47AQI (US)
9th April 2026
43AQI (US)
10th April 2026
44AQI (US)
11th April 2026
86AQI (US)
12th April 2026
81AQI (US)
13th April 2026
83AQI (US)
14th April 2026
79AQI (US)
15th April 2026
120AQI (US)
16th April 2026
51AQI (US)
17th April 2026
18th April 2026
56AQI (US)
19th April 2026
69AQI (US)
20th April 2026
71AQI (US)
21st April 2026
65AQI (US)
22nd April 2026
23rd April 2026
48AQI (US)
24th April 2026
38AQI (US)
25th April 2026
58AQI (US)
26th April 2026
56AQI (US)
27th April 2026
56AQI (US)
28th April 2026
42AQI (US)
29th April 2026
51AQI (US)
30th April 2026
52AQI (US)
1st May 2026
50AQI (US)
2nd May 2026
104AQI (US)
3rd May 2026
48AQI (US)
4th May 2026
29AQI (US)
5th May 2026
43AQI (US)
6th May 2026
34AQI (US)
7th May 2026
38AQI (US)
8th May 2026
37AQI (US)
9th May 2026
10th May 2026
36AQI (US)
11th May 2026
34AQI (US)
12th May 2026
42AQI (US)
13th May 2026
53AQI (US)
14th May 2026
56AQI (US)
15th May 2026
69AQI (US)
16th May 2026
77AQI (US)
17th May 2026
65AQI (US)
18th May 2026
56AQI (US)
19th May 2026
52AQI (US)
20th May 2026
63AQI (US)
21st May 2026
66AQI (US)
22nd May 2026
77AQI (US)
23rd May 2026
71AQI (US)
24th May 2026
70AQI (US)
25th May 2026
65AQI (US)
26th May 2026
48AQI (US)
27th May 2026
31AQI (US)
28th May 2026
40AQI (US)
29th May 2026
63AQI (US)
30th May 2026
63AQI (US)
31st May 2026
47AQI (US)
1st June 2026
42AQI (US)
2nd June 2026
60AQI (US)
3rd June 2026
80AQI (US)
4th June 2026
76AQI (US)
5th June 2026
26AQI (US)
6th June 2026
40AQI (US)
7th June 2026
24AQI (US)
8th June 2026
44AQI (US)
9th June 2026
40AQI (US)
10th June 2026
56AQI (US)
11th June 2026
69AQI (US)
12th June 2026
57AQI (US)
13th June 2026
43AQI (US)
14th June 2026
50AQI (US)
15th June 2026
43AQI (US)
16th June 2026
62AQI (US)
17th June 2026
68AQI (US)
18th June 2026
54AQI (US)
19th June 2026
62AQI (US)
20th June 2026
18AQI (US)
21st June 2026
17AQI (US)
22nd June 2026
27AQI (US)
23rd June 2026
43AQI (US)
24th June 2026
13AQI (US)
25th June 2026
24AQI (US)
26th June 2026
35AQI (US)
27th June 2026
61AQI (US)
28th June 2026
54AQI (US)
29th June 2026
53AQI (US)
30th June 2026
48AQI (US)
1st July 2026
49AQI (US)
2nd July 2026
36AQI (US)
3rd July 2026
30AQI (US)
4th July 2026
53AQI (US)
5th July 2026
38AQI (US)
6th July 2026
37AQI (US)
7th July 2026
38AQI (US)
8th July 2026
29AQI (US)
9th July 2026
24AQI (US)
10th July 2026
27AQI (US)
11th July 2026
35AQI (US)
12th July 2026
57AQI (US)
13th July 2026
39AQI (US)
14th July 2026
28AQI (US)
15th July 2026
43AQI (US)
16th July 2026
62AQI (US)
17th July 2026
74AQI (US)
18th July 2026
42AQI (US)
19th July 2026
35AQI (US)
20th July 2026
32AQI (US)
21st July 2026
33AQI (US)
22nd July 2026
41AQI (US)
23rd July 2026
55AQI (US)
24th July 2026
45AQI (US)
25th July 2026
29AQI (US)
26th July 2026
26AQI (US)
27th July 2026
28AQI (US)
28th July 2026
42AQI (US)
29th July 2026
25AQI (US)
30th July 2026
26AQI (US)
31st July 2026
43AQI (US)
1st August 2026
69AQI (US)
2nd August 2026
46AQI (US)
3rd August 2026
51AQI (US)
4th August 2026
65AQI (US)
5th August 2026
34AQI (US)
6th August 2026
51AQI (US)
7th August 2026
55AQI (US)
8th August 2026
32AQI (US)
9th August 2026
10th August 2026
11th August 2026
12th August 2026
13th August 2026
14th August 2026
15th August 2026
16th August 2026
17th August 2026
18th August 2026
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
30th September 2026
1st October 2026
2nd October 2026
3rd October 2026
4th October 2026
5th October 2026
6th October 2026
7th October 2026
8th October 2026
9th October 2026
10th October 2026
11th October 2026
12th October 2026
13th October 2026
14th October 2026
15th October 2026
16th October 2026
17th October 2026
18th October 2026
19th October 2026
20th October 2026
21st October 2026
22nd October 2026
23rd October 2026
24th October 2026
25th October 2026
26th October 2026
27th October 2026
28th October 2026
29th October 2026
30th October 2026
31st October 2026
1st November 2026
2nd November 2026
3rd November 2026
4th November 2026
5th November 2026
6th November 2026
7th November 2026
8th November 2026
9th November 2026
10th November 2026
11th November 2026
12th November 2026
13th November 2026
14th November 2026
15th November 2026
16th November 2026
17th November 2026
18th November 2026
19th November 2026
20th November 2026
21st November 2026
22nd November 2026
23rd November 2026
24th November 2026
25th November 2026
26th November 2026
27th November 2026
28th November 2026
29th November 2026
30th November 2026
1st December 2026
2nd December 2026
3rd December 2026
4th December 2026
5th December 2026
6th December 2026
7th December 2026
8th December 2026
9th December 2026
10th December 2026
11th December 2026
12th December 2026
13th December 2026
14th December 2026
15th December 2026
16th December 2026
17th December 2026
18th December 2026
19th December 2026
20th December 2026
21st December 2026
22nd December 2026
23rd December 2026
24th December 2026
25th December 2026
26th December 2026
27th December 2026
28th December 2026
29th December 2026
30th December 2026
31st December 2026

58AQI (US)

73AQI (US)

84AQI (US)

64AQI (US)

54AQI (US)

46AQI (US)

39AQI (US)

50AQI (US)

No. of days

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

202659AQI (US)

14
15
2
11
10
6
1
5
16
10
7
19
2
14
15
1
17
13
26
5
3
5
97
98
21
1

Highest AQI (US) recorded in

March

84AQI (US)

Lowest AQI (US) recorded in

July

39AQI (US)

202563AQI (US)

1
24
6
5
22
1
3
19
9
3
27
7
24
4
25
1
14
17
21
10
25
5
19
12
7
19
3
1
11
18
2
120
222
22
1

Highest AQI (US) recorded in

March

85AQI (US)

Lowest AQI (US) recorded in

September

43AQI (US)

202463AQI (US)

10
15
6
9
13
6
1
6
22
2
1
2
23
5
10
20
1
5
25
21
9
1
10
21
21
9
16
14
1
9
20
1
5
26
124
217
23
2

Highest AQI (US) recorded in

March

77AQI (US)

Lowest AQI (US) recorded in

September

43AQI (US)

202370AQI (US)

5
17
6
3
2
18
5
3
2
16
13
2
22
5
1
5
24
2
3
27
12
17
2
14
17
17
13
11
18
2
12
15
2
11
13
7
96
217
44
7

Highest AQI (US) recorded in

March

96AQI (US)

Lowest AQI (US) recorded in

September

51AQI (US)

202271AQI (US)

1
20
7
2
3
11
5
2
4
19
8
5
18
7
6
23
2
13
17
5
20
2
1
18
9
2
14
12
5
5
17
7
1
5
22
4
81
189
47
5

Highest AQI (US) recorded in

January

87AQI (US)

Lowest AQI (US) recorded in

August

38AQI (US)

202168AQI (US)

8
20
2
5
15
6
2
3
17
9
1
1
8
20
2
8
18
3
2
3
24
3
15
16
17
14
25
5
13
17
1
7
19
2
2
9
13
9
121
198
37
5
1
2

Highest AQI (US) recorded in

March

96AQI (US)

Lowest AQI (US) recorded in

September

39AQI (US)

202065AQI (US)

3
9
1
3
17
1
4
12
2
3
23
4
18
12
1
18
13
19
11
10
19
2
7
15
8
8
13
9
1
93
144
28
1

Highest AQI (US) recorded in

December

79AQI (US)

Lowest AQI (US) recorded in

September

47AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2022(Avg.)
71AQI (US)
Least Polluted Year Recorded
2026(Avg.)
59AQI (US)

Osan's annual 2026 AQI (US) (59) shows an average percentage change of -11.2% (improved AQI (US)) compared to previous years: 2020 (65), 2021 (68), 2022 (71), 2023 (70), 2024 (63), 2025 (63).