Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Hongseong, Chungnam, 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

Hongseong, Chungnam, South Korea

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
2nd Aug 2023
79AQI
Lowest AQI recorded on
10th Aug 2026
20AQI

Same Day Analysis (14th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 46 of Good air quality, showing improvement over 2024 and 2023 on the same day.

Day & Night AQI Trend: 13th Aug - 14th Aug 2026

Hongseong, Chungnam, South Korea

AQI
Day
Night
.

5 AM13th Aug 2026

7 PM

4 AM14th Aug 2026

Day time
Avg. Highest Time
1PM13th Aug

48AQI

Avg. Lowest Time
5PM13th Aug

20AQI

Night time
Avg. Highest Time
4AM14th Aug

55AQI

Avg. Lowest Time
8PM13th Aug

26AQI

In the last 24 hours,

Hongseong's AQI reached its highest point of 55 at 4 AM during the Night, while the lowest point, 20, was recorded at 5 PM during the Day between 13th Aug and 14th Aug 2026.

Day & Night AQI Trend : Jul - Aug 2026

Hongseong, Chungnam, South Korea

JulAug
16th - 17th17th - 18th18th - 19th19th - 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
Day
Night
16th Jul 2026605 AMAQI
16th Jul 2026566 AMAQI
16th Jul 2026627 AMAQI
16th Jul 2026588 AMAQI
16th Jul 2026569 AMAQI
16th Jul 20265710 AMAQI
16th Jul 20266011 AMAQI
16th Jul 20266412 PMAQI
16th Jul 2026571 PMAQI
16th Jul 2026542 PMAQI
16th Jul 2026523 PMAQI
16th Jul 2026524 PMAQI
16th Jul 2026535 PMAQI
16th Jul 2026526 PMAQI
16th Jul 2026517 PMAQI
16th Jul 2026448 PMAQI
16th Jul 2026449 PMAQI
16th Jul 20264810 PMAQI
16th Jul 20265011 PMAQI
17th Jul 20265412 AMAQI
17th Jul 2026521 AMAQI
17th Jul 2026502 AMAQI
17th Jul 2026533 AMAQI
17th Jul 2026544 AMAQI

25°C21/30°C

17th Jul 2026565 AMAQI
17th Jul 2026566 AMAQI
17th Jul 2026547 AMAQI
17th Jul 2026568 AMAQI
17th Jul 2026599 AMAQI
17th Jul 20266010 AMAQI
17th Jul 20267011 AMAQI
17th Jul 20267412 PMAQI
17th Jul 2026831 PMAQI
17th Jul 2026722 PMAQI
17th Jul 2026583 PMAQI
17th Jul 2026614 PMAQI
17th Jul 2026635 PMAQI
17th Jul 2026576 PMAQI
17th Jul 2026587 PMAQI
17th Jul 2026558 PMAQI
17th Jul 2026559 PMAQI
17th Jul 20265710 PMAQI
17th Jul 20265011 PMAQI
18th Jul 20264512 AMAQI
18th Jul 2026481 AMAQI
18th Jul 2026442 AMAQI
18th Jul 2026393 AMAQI
18th Jul 2026364 AMAQI

25°C23/29°C

18th Jul 2026365 AMAQI
18th Jul 2026416 AMAQI
18th Jul 2026407 AMAQI
18th Jul 2026508 AMAQI
18th Jul 2026519 AMAQI
18th Jul 20265210 AMAQI
18th Jul 20265311 AMAQI
18th Jul 20264212 PMAQI
18th Jul 2026441 PMAQI
18th Jul 2026542 PMAQI
18th Jul 2026563 PMAQI
18th Jul 2026554 PMAQI
18th Jul 2026365 PMAQI
18th Jul 2026276 PMAQI
18th Jul 2026307 PMAQI
18th Jul 2026288 PMAQI
18th Jul 2026329 PMAQI
18th Jul 20263410 PMAQI
18th Jul 20263211 PMAQI
19th Jul 20263212 AMAQI
19th Jul 2026321 AMAQI
19th Jul 2026322 AMAQI
19th Jul 2026293 AMAQI
19th Jul 2026294 AMAQI

25°C24/26°C

19th Jul 2026305 AMAQI
19th Jul 2026346 AMAQI
19th Jul 2026337 AMAQI
19th Jul 2026338 AMAQI
19th Jul 2026259 AMAQI
19th Jul 20264110 AMAQI
19th Jul 20263311 AMAQI
19th Jul 20262612 PMAQI
19th Jul 2026261 PMAQI
19th Jul 2026352 PMAQI
19th Jul 2026413 PMAQI
19th Jul 2026404 PMAQI
19th Jul 2026285 PMAQI
19th Jul 2026266 PMAQI
19th Jul 2026247 PMAQI
19th Jul 2026248 PMAQI
19th Jul 2026349 PMAQI
19th Jul 20263610 PMAQI
19th Jul 20263311 PMAQI
20th Jul 20264212 AMAQI
20th Jul 2026441 AMAQI
20th Jul 2026402 AMAQI
20th Jul 2026403 AMAQI
20th Jul 2026384 AMAQI

24°C22/26°C

20th Jul 2026375 AMAQI
20th Jul 2026296 AMAQI
20th Jul 2026347 AMAQI
20th Jul 2026348 AMAQI
20th Jul 2026269 AMAQI
20th Jul 20262410 AMAQI
20th Jul 20262111 AMAQI
20th Jul 20262912 PMAQI
20th Jul 2026321 PMAQI
20th Jul 2026332 PMAQI
20th Jul 2026443 PMAQI
20th Jul 2026504 PMAQI
20th Jul 2026535 PMAQI
20th Jul 2026506 PMAQI
20th Jul 2026517 PMAQI
20th Jul 2026548 PMAQI
20th Jul 2026429 PMAQI
20th Jul 20263810 PMAQI
20th Jul 20262711 PMAQI
21st Jul 20263012 AMAQI
21st Jul 2026311 AMAQI
21st Jul 2026242 AMAQI
21st Jul 2026243 AMAQI
21st Jul 2026274 AMAQI

25°C21/30°C

21st Jul 2026275 AMAQI
21st Jul 2026256 AMAQI
21st Jul 2026267 AMAQI
21st Jul 2026258 AMAQI
21st Jul 2026289 AMAQI
21st Jul 20263810 AMAQI
21st Jul 20264511 AMAQI
21st Jul 2026411 PMAQI
21st Jul 2026342 PMAQI
21st Jul 2026363 PMAQI
21st Jul 2026364 PMAQI
21st Jul 2026305 PMAQI
21st Jul 2026256 PMAQI
21st Jul 2026817 PMAQI
21st Jul 2026378 PMAQI
21st Jul 2026319 PMAQI
21st Jul 20263010 PMAQI
21st Jul 20263011 PMAQI
22nd Jul 20263212 AMAQI
22nd Jul 2026301 AMAQI
22nd Jul 2026302 AMAQI
22nd Jul 2026293 AMAQI
22nd Jul 2026334 AMAQI

25°C23/27°C

22nd Jul 2026475 AMAQI
22nd Jul 2026296 AMAQI
22nd Jul 2026287 AMAQI
22nd Jul 2026248 AMAQI
22nd Jul 2026289 AMAQI
22nd Jul 20263010 AMAQI
22nd Jul 20263411 AMAQI
22nd Jul 20266512 PMAQI
22nd Jul 2026661 PMAQI
22nd Jul 2026582 PMAQI
22nd Jul 2026493 PMAQI
22nd Jul 2026484 PMAQI
22nd Jul 2026425 PMAQI
22nd Jul 2026606 PMAQI
22nd Jul 2026577 PMAQI
22nd Jul 2026488 PMAQI
22nd Jul 2026469 PMAQI
22nd Jul 20265610 PMAQI
22nd Jul 20266011 PMAQI
23rd Jul 20266012 AMAQI
23rd Jul 2026521 AMAQI
23rd Jul 2026512 AMAQI
23rd Jul 2026483 AMAQI
23rd Jul 2026474 AMAQI

27°C24/31°C

23rd Jul 2026525 AMAQI
23rd Jul 2026526 AMAQI
23rd Jul 2026477 AMAQI
23rd Jul 2026418 AMAQI
23rd Jul 2026409 AMAQI
23rd Jul 20264410 AMAQI
23rd Jul 20264911 AMAQI
23rd Jul 20265212 PMAQI
23rd Jul 2026551 PMAQI
23rd Jul 2026572 PMAQI
23rd Jul 2026623 PMAQI
23rd Jul 2026584 PMAQI
23rd Jul 2026585 PMAQI
23rd Jul 2026546 PMAQI
23rd Jul 2026587 PMAQI
23rd Jul 2026578 PMAQI
23rd Jul 2026519 PMAQI
23rd Jul 20264410 PMAQI
23rd Jul 20264511 PMAQI
24th Jul 20264312 AMAQI
24th Jul 2026411 AMAQI
24th Jul 2026402 AMAQI
24th Jul 2026363 AMAQI
24th Jul 2026424 AMAQI

26°C23/30°C

24th Jul 2026425 AMAQI
24th Jul 2026406 AMAQI
24th Jul 2026387 AMAQI
24th Jul 2026398 AMAQI
24th Jul 2026509 AMAQI
24th Jul 20265610 AMAQI
24th Jul 20265611 AMAQI
24th Jul 20265912 PMAQI
24th Jul 2026401 PMAQI
24th Jul 2026382 PMAQI
24th Jul 2026353 PMAQI
24th Jul 2026334 PMAQI
24th Jul 2026295 PMAQI
24th Jul 2026266 PMAQI
24th Jul 2026247 PMAQI
24th Jul 2026228 PMAQI
24th Jul 2026249 PMAQI
24th Jul 20263310 PMAQI
24th Jul 20263611 PMAQI
25th Jul 20263712 AMAQI
25th Jul 2026301 AMAQI
25th Jul 2026282 AMAQI
25th Jul 2026253 AMAQI
25th Jul 2026214 AMAQI

27°C23/32°C

25th Jul 2026245 AMAQI
25th Jul 2026246 AMAQI
25th Jul 2026267 AMAQI
25th Jul 2026248 AMAQI
25th Jul 2026269 AMAQI
25th Jul 20263810 AMAQI
25th Jul 20263411 AMAQI
25th Jul 20263912 PMAQI
25th Jul 2026361 PMAQI
25th Jul 2026382 PMAQI
25th Jul 2026363 PMAQI
25th Jul 2026224 PMAQI
25th Jul 2026205 PMAQI
25th Jul 2026226 PMAQI
25th Jul 2026277 PMAQI
25th Jul 2026248 PMAQI
25th Jul 2026289 PMAQI
25th Jul 20262510 PMAQI
25th Jul 20262511 PMAQI
26th Jul 20262812 AMAQI
26th Jul 2026271 AMAQI
26th Jul 2026282 AMAQI
26th Jul 2026283 AMAQI
26th Jul 2026224 AMAQI

27°C23/31°C

26th Jul 2026215 AMAQI
26th Jul 2026236 AMAQI
26th Jul 2026257 AMAQI
26th Jul 2026218 AMAQI
26th Jul 2026269 AMAQI
26th Jul 20263610 AMAQI
26th Jul 20263711 AMAQI
26th Jul 20262812 PMAQI
26th Jul 2026281 PMAQI
26th Jul 2026222 PMAQI
26th Jul 2026253 PMAQI
26th Jul 2026254 PMAQI
26th Jul 2026225 PMAQI
26th Jul 2026226 PMAQI
26th Jul 2026247 PMAQI
26th Jul 2026248 PMAQI
26th Jul 2026229 PMAQI
26th Jul 20262410 PMAQI
26th Jul 20262211 PMAQI
27th Jul 20262412 AMAQI
27th Jul 2026221 AMAQI
27th Jul 2026242 AMAQI
27th Jul 2026253 AMAQI
27th Jul 2026264 AMAQI

27°C24/32°C

27th Jul 2026295 AMAQI
27th Jul 2026306 AMAQI
27th Jul 2026317 AMAQI
27th Jul 2026288 AMAQI
27th Jul 2026289 AMAQI
27th Jul 20263010 AMAQI
27th Jul 20263511 AMAQI
27th Jul 20263412 PMAQI
27th Jul 2026261 PMAQI
27th Jul 2026272 PMAQI
27th Jul 2026283 PMAQI
27th Jul 2026294 PMAQI
27th Jul 2026265 PMAQI
27th Jul 2026306 PMAQI
27th Jul 2026287 PMAQI
27th Jul 2026248 PMAQI
27th Jul 2026279 PMAQI
27th Jul 20262910 PMAQI
27th Jul 20263111 PMAQI
28th Jul 20262412 AMAQI
28th Jul 2026261 AMAQI
28th Jul 2026322 AMAQI
28th Jul 2026383 AMAQI
28th Jul 2026284 AMAQI

27°C24/33°C

28th Jul 2026285 AMAQI
28th Jul 2026296 AMAQI
28th Jul 2026317 AMAQI
28th Jul 2026328 AMAQI
28th Jul 2026369 AMAQI
28th Jul 20264410 AMAQI
28th Jul 20265211 AMAQI
28th Jul 20265112 PMAQI
28th Jul 2026541 PMAQI
28th Jul 2026552 PMAQI
28th Jul 2026733 PMAQI
28th Jul 2026624 PMAQI
28th Jul 2026485 PMAQI
28th Jul 2026496 PMAQI
28th Jul 2026447 PMAQI
28th Jul 2026408 PMAQI
28th Jul 2026409 PMAQI
28th Jul 20263610 PMAQI
28th Jul 20262811 PMAQI
29th Jul 20263112 AMAQI
29th Jul 2026261 AMAQI
29th Jul 2026232 AMAQI
29th Jul 2026203 AMAQI
29th Jul 2026224 AMAQI

27°C24/32°C

29th Jul 2026225 AMAQI
29th Jul 2026206 AMAQI
29th Jul 2026227 AMAQI
29th Jul 2026218 AMAQI
29th Jul 2026259 AMAQI
29th Jul 20263010 AMAQI
29th Jul 20263011 AMAQI
29th Jul 20262012 PMAQI
29th Jul 2026221 PMAQI
29th Jul 2026242 PMAQI
29th Jul 2026243 PMAQI
29th Jul 2026234 PMAQI
29th Jul 2026225 PMAQI
29th Jul 2026236 PMAQI
29th Jul 2026227 PMAQI
29th Jul 2026208 PMAQI
29th Jul 2026199 PMAQI
29th Jul 20262110 PMAQI
29th Jul 20262211 PMAQI
30th Jul 20262312 AMAQI
30th Jul 2026241 AMAQI
30th Jul 2026212 AMAQI
30th Jul 2026233 AMAQI
30th Jul 2026264 AMAQI

26°C23/31°C

30th Jul 2026255 AMAQI
30th Jul 2026226 AMAQI
30th Jul 2026227 AMAQI
30th Jul 2026228 AMAQI
30th Jul 2026249 AMAQI
30th Jul 20263410 AMAQI
30th Jul 20264511 AMAQI
30th Jul 20267012 PMAQI
30th Jul 2026321 PMAQI
30th Jul 2026212 PMAQI
30th Jul 2026283 PMAQI
30th Jul 2026284 PMAQI
30th Jul 2026285 PMAQI
30th Jul 2026286 PMAQI
30th Jul 2026257 PMAQI
30th Jul 2026268 PMAQI
30th Jul 2026249 PMAQI
30th Jul 20262010 PMAQI
30th Jul 20262611 PMAQI
31st Jul 20262712 AMAQI
31st Jul 2026271 AMAQI
31st Jul 2026252 AMAQI
31st Jul 2026213 AMAQI
31st Jul 2026234 AMAQI

26°C22/32°C

31st Jul 2026245 AMAQI
31st Jul 2026326 AMAQI
31st Jul 2026447 AMAQI
31st Jul 2026338 AMAQI
31st Jul 2026499 AMAQI
31st Jul 20267310 AMAQI
31st Jul 20267111 AMAQI
31st Jul 20267412 PMAQI
31st Jul 2026661 PMAQI
31st Jul 2026482 PMAQI
31st Jul 2026483 PMAQI
31st Jul 2026424 PMAQI
31st Jul 2026535 PMAQI
31st Jul 2026506 PMAQI
31st Jul 2026407 PMAQI
31st Jul 2026388 PMAQI
31st Jul 2026349 PMAQI
31st Jul 20263610 PMAQI
31st Jul 20264311 PMAQI
1st Aug 20264712 AMAQI
1st Aug 2026491 AMAQI
1st Aug 2026522 AMAQI
1st Aug 2026603 AMAQI
1st Aug 2026694 AMAQI

27°C22/32°C

1st Aug 2026715 AMAQI
1st Aug 2026696 AMAQI
1st Aug 2026787 AMAQI
1st Aug 2026798 AMAQI
1st Aug 2026909 AMAQI
1st Aug 20268410 AMAQI
1st Aug 20268411 AMAQI
1st Aug 20268012 PMAQI
1st Aug 2026701 PMAQI
1st Aug 2026592 PMAQI
1st Aug 2026623 PMAQI
1st Aug 2026684 PMAQI
1st Aug 2026735 PMAQI
1st Aug 2026746 PMAQI
1st Aug 2026597 PMAQI
1st Aug 2026598 PMAQI
1st Aug 2026599 PMAQI
1st Aug 20265210 PMAQI
1st Aug 20264711 PMAQI
2nd Aug 20264812 AMAQI
2nd Aug 2026491 AMAQI
2nd Aug 2026542 AMAQI
2nd Aug 2026443 AMAQI
2nd Aug 2026334 AMAQI

28°C24/33°C

2nd Aug 2026405 AMAQI
2nd Aug 2026456 AMAQI
2nd Aug 2026437 AMAQI
2nd Aug 2026368 AMAQI
2nd Aug 2026469 AMAQI
2nd Aug 20264910 AMAQI
2nd Aug 20264411 AMAQI
2nd Aug 20264312 PMAQI
2nd Aug 2026431 PMAQI
2nd Aug 2026342 PMAQI
2nd Aug 2026443 PMAQI
2nd Aug 2026474 PMAQI
2nd Aug 2026445 PMAQI
2nd Aug 2026496 PMAQI
2nd Aug 2026497 PMAQI
2nd Aug 2026408 PMAQI
2nd Aug 2026349 PMAQI
2nd Aug 20262710 PMAQI
2nd Aug 20262611 PMAQI
3rd Aug 20263312 AMAQI
3rd Aug 2026381 AMAQI
3rd Aug 2026382 AMAQI
3rd Aug 2026413 AMAQI
3rd Aug 2026444 AMAQI

28°C24/34°C

3rd Aug 2026445 AMAQI
3rd Aug 2026296 AMAQI
3rd Aug 2026447 AMAQI
3rd Aug 2026438 AMAQI
3rd Aug 2026449 AMAQI
3rd Aug 20264410 AMAQI
3rd Aug 20264611 AMAQI
3rd Aug 20265612 PMAQI
3rd Aug 2026631 PMAQI
3rd Aug 2026762 PMAQI
3rd Aug 2026713 PMAQI
3rd Aug 2026744 PMAQI
3rd Aug 2026725 PMAQI
3rd Aug 2026586 PMAQI
3rd Aug 2026547 PMAQI
3rd Aug 2026618 PMAQI
3rd Aug 2026639 PMAQI
3rd Aug 20266610 PMAQI
3rd Aug 20266811 PMAQI
4th Aug 20266812 AMAQI
4th Aug 2026741 AMAQI
4th Aug 2026742 AMAQI
4th Aug 2026673 AMAQI
4th Aug 2026644 AMAQI

28°C22/36°C

4th Aug 2026655 AMAQI
4th Aug 2026646 AMAQI
4th Aug 2026687 AMAQI
4th Aug 2026678 AMAQI
4th Aug 2026689 AMAQI
4th Aug 20267310 AMAQI
4th Aug 20267911 AMAQI
4th Aug 20268412 PMAQI
4th Aug 2026831 PMAQI
4th Aug 2026812 PMAQI
4th Aug 2026783 PMAQI
4th Aug 2026764 PMAQI
4th Aug 2026765 PMAQI
4th Aug 2026696 PMAQI
4th Aug 2026627 PMAQI
4th Aug 2026808 PMAQI
4th Aug 2026789 PMAQI
4th Aug 20267210 PMAQI
4th Aug 20265511 PMAQI
5th Aug 20264212 AMAQI
5th Aug 2026381 AMAQI
5th Aug 2026332 AMAQI
5th Aug 2026353 AMAQI
5th Aug 2026384 AMAQI

29°C24/37°C

5th Aug 2026425 AMAQI
5th Aug 2026386 AMAQI
5th Aug 2026387 AMAQI
5th Aug 2026378 AMAQI
5th Aug 2026359 AMAQI
5th Aug 20264410 AMAQI
5th Aug 20263911 AMAQI
5th Aug 20263412 PMAQI
5th Aug 2026391 PMAQI
5th Aug 2026412 PMAQI
5th Aug 2026363 PMAQI
5th Aug 2026484 PMAQI
5th Aug 2026345 PMAQI
5th Aug 2026346 PMAQI
5th Aug 2026407 PMAQI
5th Aug 2026348 PMAQI
5th Aug 2026439 PMAQI
5th Aug 20264610 PMAQI
5th Aug 20265411 PMAQI
6th Aug 20267812 AMAQI
6th Aug 2026861 AMAQI
6th Aug 2026772 AMAQI
6th Aug 2026763 AMAQI
6th Aug 2026724 AMAQI

29°C24/36°C

6th Aug 2026795 AMAQI
6th Aug 2026766 AMAQI
6th Aug 2026757 AMAQI
6th Aug 2026668 AMAQI
6th Aug 2026569 AMAQI
6th Aug 20265310 AMAQI
6th Aug 20265311 AMAQI
6th Aug 20265212 PMAQI
6th Aug 2026521 PMAQI
6th Aug 2026502 PMAQI
6th Aug 2026293 PMAQI
6th Aug 2026304 PMAQI
6th Aug 2026325 PMAQI
6th Aug 2026346 PMAQI
6th Aug 2026357 PMAQI
6th Aug 2026388 PMAQI
6th Aug 2026399 PMAQI
6th Aug 20264910 PMAQI
6th Aug 20266811 PMAQI
7th Aug 20267512 AMAQI
7th Aug 2026891 AMAQI
7th Aug 20261002 AMAQI
7th Aug 2026973 AMAQI
7th Aug 2026994 AMAQI

29°C24/36°C

7th Aug 2026945 AMAQI
7th Aug 2026926 AMAQI
7th Aug 2026847 AMAQI
7th Aug 2026768 AMAQI
7th Aug 2026789 AMAQI
7th Aug 20267910 AMAQI
7th Aug 20267611 AMAQI
7th Aug 20267512 PMAQI
7th Aug 2026761 PMAQI
7th Aug 2026472 PMAQI
7th Aug 2026313 PMAQI
7th Aug 2026244 PMAQI
7th Aug 2026245 PMAQI
7th Aug 2026336 PMAQI
7th Aug 2026387 PMAQI
7th Aug 2026388 PMAQI
7th Aug 2026449 PMAQI
7th Aug 20265810 PMAQI
7th Aug 20266611 PMAQI
8th Aug 20266712 AMAQI
8th Aug 2026621 AMAQI
8th Aug 2026622 AMAQI
8th Aug 2026633 AMAQI
8th Aug 2026654 AMAQI

29°C24/37°C

8th Aug 2026735 AMAQI
8th Aug 2026806 AMAQI
8th Aug 2026767 AMAQI
8th Aug 2026708 AMAQI
8th Aug 2026769 AMAQI
8th Aug 20268110 AMAQI
8th Aug 20266711 AMAQI
8th Aug 20264012 PMAQI
8th Aug 2026271 PMAQI
8th Aug 2026262 PMAQI
8th Aug 2026183 PMAQI
8th Aug 2026204 PMAQI
8th Aug 2026215 PMAQI
8th Aug 2026336 PMAQI
8th Aug 2026267 PMAQI
8th Aug 2026218 PMAQI
8th Aug 2026179 PMAQI
8th Aug 20262610 PMAQI
8th Aug 20262411 PMAQI
9th Aug 20262212 AMAQI
9th Aug 2026161 AMAQI
9th Aug 2026182 AMAQI
9th Aug 2026183 AMAQI
9th Aug 2026184 AMAQI

29°C25/36°C

9th Aug 2026165 AMAQI
9th Aug 2026166 AMAQI
9th Aug 2026177 AMAQI
9th Aug 2026218 AMAQI
9th Aug 2026169 AMAQI
9th Aug 20261610 AMAQI
9th Aug 20262411 AMAQI
9th Aug 20262812 PMAQI
9th Aug 2026361 PMAQI
9th Aug 2026362 PMAQI
9th Aug 2026363 PMAQI
9th Aug 2026304 PMAQI
9th Aug 2026255 PMAQI
9th Aug 2026226 PMAQI
9th Aug 2026207 PMAQI
9th Aug 2026248 PMAQI
9th Aug 2026229 PMAQI
9th Aug 20262010 PMAQI
9th Aug 20261911 PMAQI
10th Aug 20261712 AMAQI
10th Aug 2026151 AMAQI
10th Aug 2026142 AMAQI
10th Aug 2026173 AMAQI
10th Aug 2026144 AMAQI

27°C23/31°C

10th Aug 2026145 AMAQI
10th Aug 2026166 AMAQI
10th Aug 2026187 AMAQI
10th Aug 2026188 AMAQI
10th Aug 2026189 AMAQI
10th Aug 20261810 AMAQI
10th Aug 20261811 AMAQI
10th Aug 20262312 PMAQI
10th Aug 2026211 PMAQI
10th Aug 2026212 PMAQI
10th Aug 2026233 PMAQI
10th Aug 2026244 PMAQI
10th Aug 2026265 PMAQI
10th Aug 2026266 PMAQI
10th Aug 2026257 PMAQI
10th Aug 2026288 PMAQI
10th Aug 2026299 PMAQI
10th Aug 20262410 PMAQI
10th Aug 20262511 PMAQI
11th Aug 20262412 AMAQI
11th Aug 2026251 AMAQI
11th Aug 2026232 AMAQI
11th Aug 2026223 AMAQI
11th Aug 2026204 AMAQI

26°C24/31°C

11th Aug 2026185 AMAQI
11th Aug 2026206 AMAQI
11th Aug 2026207 AMAQI
11th Aug 2026268 AMAQI
11th Aug 2026369 AMAQI
11th Aug 20263810 AMAQI
11th Aug 20262411 AMAQI
11th Aug 20262312 PMAQI
11th Aug 2026241 PMAQI
11th Aug 2026262 PMAQI
11th Aug 2026303 PMAQI
11th Aug 2026314 PMAQI
11th Aug 2026465 PMAQI
11th Aug 2026586 PMAQI
11th Aug 2026427 PMAQI
11th Aug 2026248 PMAQI
11th Aug 2026239 PMAQI
11th Aug 20263810 PMAQI
11th Aug 20263711 PMAQI
12th Aug 20263312 AMAQI
12th Aug 2026291 AMAQI
12th Aug 2026242 AMAQI
12th Aug 2026233 AMAQI
12th Aug 2026244 AMAQI

25°C21/31°C

12th Aug 2026245 AMAQI
12th Aug 2026246 AMAQI
12th Aug 2026227 AMAQI
12th Aug 2026228 AMAQI
12th Aug 2026269 AMAQI
12th Aug 20262610 AMAQI
12th Aug 20262511 AMAQI
12th Aug 20262412 PMAQI
12th Aug 2026241 PMAQI
12th Aug 2026242 PMAQI
12th Aug 2026243 PMAQI
12th Aug 2026304 PMAQI
12th Aug 2026355 PMAQI
12th Aug 2026316 PMAQI
12th Aug 2026267 PMAQI
12th Aug 2026228 PMAQI
12th Aug 2026309 PMAQI
12th Aug 20263110 PMAQI
12th Aug 20263811 PMAQI
13th Aug 20263312 AMAQI
13th Aug 2026261 AMAQI
13th Aug 2026252 AMAQI
13th Aug 2026243 AMAQI
13th Aug 2026224 AMAQI

23°C16/30°C

13th Aug 2026255 AMAQI
13th Aug 2026286 AMAQI
13th Aug 2026247 AMAQI
13th Aug 2026288 AMAQI
13th Aug 2026269 AMAQI
13th Aug 20263210 AMAQI
13th Aug 20263211 AMAQI
13th Aug 20263812 PMAQI
13th Aug 2026481 PMAQI
13th Aug 2026412 PMAQI
13th Aug 2026423 PMAQI
13th Aug 2026264 PMAQI
13th Aug 2026205 PMAQI
13th Aug 2026236 PMAQI
13th Aug 2026247 PMAQI
13th Aug 2026268 PMAQI
13th Aug 2026349 PMAQI
13th Aug 20264210 PMAQI
13th Aug 20264511 PMAQI
14th Aug 20263612 AMAQI
14th Aug 2026371 AMAQI
14th Aug 2026382 AMAQI
14th Aug 2026523 AMAQI
14th Aug 2026554 AMAQI

25°C19/31°C

14th Aug 2026495 AMAQI
5 AM
14th Aug 2026416 AMAQI
14th Aug 2026337 AMAQI
14th Aug 2026298 AMAQI
14th Aug 2026339 AMAQI
14th Aug 20265210 AMAQI
14th Aug 20265911 AMAQI
14th Aug 20264812 PMAQI
12 PM
14th Aug 2026311 PMAQI
14th Aug 2026292 PMAQI
14th Aug 2026343 PMAQI
14th Aug 2026404 PMAQI
14th Aug 2026545 PMAQI
14th Aug 2026566 PMAQI
14th Aug 2026567 PMAQI
7 PM
14th Aug 2026628 PMAQI
14th Aug 2026669 PMAQI
14th Aug 20266510 PMAQI
14th Aug 20266611 PMAQI
12 AM
4 AM

24°C20/30°C

Day time
Avg. Highest Time
10 AM - 12 PM

47AQI

3 hours / Day
90 hours / Month
Avg. Lowest Time
5 AM - 8 AM

40AQI

4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 10 AM to 12 PM (Avg. 47), while the lowest AQI was between 5 AM to 8 AM (Avg. 40).
Night time
Avg. Highest Time
12 AM - 4 AM

40AQI

5 hours / Day
150 hours / Month
Avg. Lowest Time
8 PM - 11 PM

39AQI

4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 4 AM (Avg. 40), while the lowest AQI was between 8 PM to 11 PM (Avg. 39).

2026 Days Vs Air Quality

Hongseong, Chungnam, South Korea

2026

45%

100

47%

104

9%

19

Total number of days with different AQI categories in last 226 days in 2026 (139 days remaining)

Good
100 Days
Moderate
104 Days
Poor
19 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 45%

Health Risk Level:

Significant

In 2026, 45% of 226 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

Hongseong, Chungnam, 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
28AQI (US)
2nd January 2026
39AQI (US)
3rd January 2026
52AQI (US)
4th January 2026
82AQI (US)
5th January 2026
58AQI (US)
6th January 2026
51AQI (US)
7th January 2026
60AQI (US)
8th January 2026
22AQI (US)
9th January 2026
38AQI (US)
10th January 2026
63AQI (US)
11th January 2026
28AQI (US)
12th January 2026
48AQI (US)
13th January 2026
53AQI (US)
14th January 2026
30AQI (US)
15th January 2026
110AQI (US)
16th January 2026
133AQI (US)
17th January 2026
122AQI (US)
18th January 2026
123AQI (US)
19th January 2026
63AQI (US)
20th January 2026
28AQI (US)
21st January 2026
36AQI (US)
22nd January 2026
36AQI (US)
23rd January 2026
64AQI (US)
24th January 2026
58AQI (US)
25th January 2026
31AQI (US)
26th January 2026
47AQI (US)
27th January 2026
58AQI (US)
28th January 2026
35AQI (US)
29th January 2026
49AQI (US)
30th January 2026
48AQI (US)
31st January 2026
76AQI (US)
1st February 2026
96AQI (US)
2nd February 2026
76AQI (US)
3rd February 2026
66AQI (US)
4th February 2026
100AQI (US)
5th February 2026
112AQI (US)
6th February 2026
66AQI (US)
7th February 2026
34AQI (US)
8th February 2026
39AQI (US)
9th February 2026
48AQI (US)
10th February 2026
69AQI (US)
11th February 2026
97AQI (US)
12th February 2026
108AQI (US)
13th February 2026
133AQI (US)
14th February 2026
138AQI (US)
15th February 2026
104AQI (US)
16th February 2026
43AQI (US)
17th February 2026
56AQI (US)
18th February 2026
62AQI (US)
19th February 2026
35AQI (US)
20th February 2026
68AQI (US)
21st February 2026
94AQI (US)
22nd February 2026
57AQI (US)
23rd February 2026
30AQI (US)
24th February 2026
52AQI (US)
25th February 2026
71AQI (US)
26th February 2026
36AQI (US)
27th February 2026
58AQI (US)
28th February 2026
60AQI (US)
1st March 2026
62AQI (US)
2nd March 2026
19AQI (US)
3rd March 2026
26AQI (US)
4th March 2026
66AQI (US)
5th March 2026
91AQI (US)
6th March 2026
61AQI (US)
7th March 2026
50AQI (US)
8th March 2026
60AQI (US)
9th March 2026
96AQI (US)
10th March 2026
85AQI (US)
11th March 2026
91AQI (US)
12th March 2026
108AQI (US)
13th March 2026
72AQI (US)
14th March 2026
82AQI (US)
15th March 2026
97AQI (US)
16th March 2026
132AQI (US)
17th March 2026
129AQI (US)
18th March 2026
130AQI (US)
19th March 2026
56AQI (US)
20th March 2026
54AQI (US)
21st March 2026
92AQI (US)
22nd March 2026
96AQI (US)
23rd March 2026
98AQI (US)
24th March 2026
121AQI (US)
25th March 2026
99AQI (US)
26th March 2026
98AQI (US)
27th March 2026
100AQI (US)
28th March 2026
97AQI (US)
29th March 2026
104AQI (US)
30th March 2026
108AQI (US)
31st March 2026
82AQI (US)
1st April 2026
92AQI (US)
2nd April 2026
113AQI (US)
3rd April 2026
124AQI (US)
4th April 2026
54AQI (US)
5th April 2026
72AQI (US)
6th April 2026
59AQI (US)
7th April 2026
22AQI (US)
8th April 2026
36AQI (US)
9th April 2026
52AQI (US)
10th April 2026
40AQI (US)
11th April 2026
82AQI (US)
12th April 2026
78AQI (US)
13th April 2026
68AQI (US)
14th April 2026
79AQI (US)
15th April 2026
92AQI (US)
16th April 2026
82AQI (US)
17th April 2026
18th April 2026
65AQI (US)
19th April 2026
66AQI (US)
20th April 2026
68AQI (US)
21st April 2026
68AQI (US)
22nd April 2026
23rd April 2026
59AQI (US)
24th April 2026
38AQI (US)
25th April 2026
50AQI (US)
26th April 2026
56AQI (US)
27th April 2026
50AQI (US)
28th April 2026
40AQI (US)
29th April 2026
47AQI (US)
30th April 2026
48AQI (US)
1st May 2026
56AQI (US)
2nd May 2026
111AQI (US)
3rd May 2026
64AQI (US)
4th May 2026
32AQI (US)
5th May 2026
41AQI (US)
6th May 2026
30AQI (US)
7th May 2026
36AQI (US)
8th May 2026
33AQI (US)
9th May 2026
10th May 2026
33AQI (US)
11th May 2026
36AQI (US)
12th May 2026
23AQI (US)
13th May 2026
50AQI (US)
14th May 2026
76AQI (US)
15th May 2026
73AQI (US)
16th May 2026
78AQI (US)
17th May 2026
66AQI (US)
18th May 2026
56AQI (US)
19th May 2026
53AQI (US)
20th May 2026
64AQI (US)
21st May 2026
67AQI (US)
22nd May 2026
78AQI (US)
23rd May 2026
72AQI (US)
24th May 2026
70AQI (US)
25th May 2026
65AQI (US)
26th May 2026
49AQI (US)
27th May 2026
36AQI (US)
28th May 2026
33AQI (US)
29th May 2026
66AQI (US)
30th May 2026
61AQI (US)
31st May 2026
52AQI (US)
1st June 2026
54AQI (US)
2nd June 2026
84AQI (US)
3rd June 2026
79AQI (US)
4th June 2026
82AQI (US)
5th June 2026
25AQI (US)
6th June 2026
37AQI (US)
7th June 2026
44AQI (US)
8th June 2026
49AQI (US)
9th June 2026
34AQI (US)
10th June 2026
39AQI (US)
11th June 2026
45AQI (US)
12th June 2026
56AQI (US)
13th June 2026
48AQI (US)
14th June 2026
49AQI (US)
15th June 2026
47AQI (US)
16th June 2026
68AQI (US)
17th June 2026
84AQI (US)
18th June 2026
72AQI (US)
19th June 2026
76AQI (US)
20th June 2026
29AQI (US)
21st June 2026
23AQI (US)
22nd June 2026
40AQI (US)
23rd June 2026
42AQI (US)
24th June 2026
18AQI (US)
25th June 2026
28AQI (US)
26th June 2026
43AQI (US)
27th June 2026
70AQI (US)
28th June 2026
54AQI (US)
29th June 2026
54AQI (US)
30th June 2026
50AQI (US)
1st July 2026
44AQI (US)
2nd July 2026
46AQI (US)
3rd July 2026
30AQI (US)
4th July 2026
56AQI (US)
5th July 2026
40AQI (US)
6th July 2026
38AQI (US)
7th July 2026
35AQI (US)
8th July 2026
28AQI (US)
9th July 2026
20AQI (US)
10th July 2026
31AQI (US)
11th July 2026
31AQI (US)
12th July 2026
46AQI (US)
13th July 2026
36AQI (US)
14th July 2026
28AQI (US)
15th July 2026
39AQI (US)
16th July 2026
56AQI (US)
17th July 2026
59AQI (US)
18th July 2026
42AQI (US)
19th July 2026
32AQI (US)
20th July 2026
38AQI (US)
21st July 2026
33AQI (US)
22nd July 2026
43AQI (US)
23rd July 2026
52AQI (US)
24th July 2026
38AQI (US)
25th July 2026
28AQI (US)
26th July 2026
26AQI (US)
27th July 2026
28AQI (US)
28th July 2026
41AQI (US)
29th July 2026
23AQI (US)
30th July 2026
28AQI (US)
31st July 2026
42AQI (US)
1st August 2026
66AQI (US)
2nd August 2026
42AQI (US)
3rd August 2026
53AQI (US)
4th August 2026
72AQI (US)
5th August 2026
39AQI (US)
6th August 2026
56AQI (US)
7th August 2026
67AQI (US)
8th August 2026
48AQI (US)
9th August 2026
22AQI (US)
10th August 2026
20AQI (US)
11th August 2026
29AQI (US)
12th August 2026
27AQI (US)
13th August 2026
30AQI (US)
14th August 2026
46AQI (US)
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

57AQI (US)

72AQI (US)

86AQI (US)

64AQI (US)

55AQI (US)

51AQI (US)

37AQI (US)

44AQI (US)

No. of days

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

202659AQI (US)

15
12
4
7
16
5
3
21
7
9
17
2
12
17
1
18
12
27
4
9
5
100
104
19

Highest AQI (US) recorded in

March

86AQI (US)

Lowest AQI (US) recorded in

July

37AQI (US)

202563AQI (US)

1
25
5
8
17
3
4
19
8
6
24
8
23
7
23
14
17
19
12
23
7
9
21
1
4
20
6
6
23
2
109
231
25

Highest AQI (US) recorded in

March

83AQI (US)

Lowest AQI (US) recorded in

September

45AQI (US)

202465AQI (US)

7
15
9
7
14
7
1
6
21
3
1
1
26
3
6
22
3
1
29
21
10
7
24
22
8
11
19
1
9
17
4
9
22
107
227
30
2

Highest AQI (US) recorded in

January

82AQI (US)

Lowest AQI (US) recorded in

July

43AQI (US)

202367AQI (US)

7
16
5
2
3
16
6
3
5
16
10
1
22
6
1
7
23
1
3
27
14
17
11
20
12
18
13
18
12
15
2
7
18
5
1
95
226
35
7

Highest AQI (US) recorded in

February

91AQI (US)

Lowest AQI (US) recorded in

September

52AQI (US)

202269AQI (US)

3
21
4
2
2
13
4
3
5
19
7
5
24
1
5
25
1
16
14
5
19
3
16
13
11
15
5
3
21
6
6
22
3
80
206
31
5

Highest AQI (US) recorded in

February

87AQI (US)

Lowest AQI (US) recorded in

August

42AQI (US)

202170AQI (US)

5
20
5
3
15
6
4
1
16
11
1
1
1
3
25
2
5
23
1
2
5
25
16
15
14
17
25
5
9
22
8
19
3
9
11
11
103
213
39
5
3
1

Highest AQI (US) recorded in

March

110AQI (US)

Lowest AQI (US) recorded in

September

41AQI (US)

202065AQI (US)

3
8
2
1
20
2
16
5
25
16
15
18
13
17
13
7
21
3
6
17
6
1
4
18
8
1
79
166
19
2

Highest AQI (US) recorded in

December

84AQI (US)

Lowest AQI (US) recorded in

September

49AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2021(Avg.)
70AQI (US)
Least Polluted Year Recorded
2026(Avg.)
59AQI (US)

Hongseong's annual 2026 AQI (US) (59) shows an average percentage change of -11.1% (improved AQI (US)) compared to previous years: 2020 (65), 2021 (70), 2022 (69), 2023 (67), 2024 (65), 2025 (63).