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

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
12th Aug 2021
88AQI
Lowest AQI recorded on
10th Aug 2023
30AQI

Same Day Analysis (1st August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 57 of Moderate air quality, showing improvement over 2023 and 2021 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 2nd Aug - 3rd Aug 2025

Hongseong, Chungnam, South Korea

AQI
Day
Night
.

5 AM2nd Aug 2025

7 PM

4 AM3rd Aug 2025

Day time
Avg. Highest Time
12AMNaNth undefined

AQI

Avg. Lowest Time
12AMNaNth undefined

AQI

Night time
Avg. Highest Time
12PM2nd Aug

81AQI

Avg. Lowest Time
1AM3rd Aug

54AQI

In the last 24 hours,

Hongseong's AQI reached its highest point of 81 at 12 PM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 2nd Aug and 3rd Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Hongseong, Chungnam, South Korea

JulAug
04th - 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 - 03rd03rd
Day
Night
4th Jul 2025535 AMAQI
4th Jul 2025536 AMAQI
4th Jul 2025537 AMAQI
4th Jul 2025538 AMAQI
4th Jul 2025519 AMAQI
4th Jul 20255210 AMAQI
4th Jul 20255611 AMAQI
4th Jul 20255112 PMAQI
4th Jul 2025511 PMAQI
4th Jul 2025462 PMAQI
4th Jul 2025463 PMAQI
4th Jul 2025504 PMAQI
4th Jul 2025455 PMAQI
4th Jul 2025456 PMAQI
4th Jul 2025417 PMAQI
4th Jul 2025488 PMAQI
4th Jul 2025499 PMAQI
4th Jul 20255010 PMAQI
4th Jul 20254911 PMAQI
5th Jul 20255112 AMAQI
5th Jul 2025531 AMAQI
5th Jul 2025532 AMAQI
5th Jul 2025523 AMAQI
5th Jul 2025524 AMAQI

25°C21/30°C

5th Jul 2025535 AMAQI
5th Jul 2025526 AMAQI
5th Jul 2025527 AMAQI
5th Jul 2025528 AMAQI
5th Jul 2025439 AMAQI
5th Jul 20254110 AMAQI
5th Jul 20254411 AMAQI
5th Jul 20253812 PMAQI
5th Jul 2025441 PMAQI
5th Jul 2025432 PMAQI
5th Jul 2025463 PMAQI
5th Jul 2025474 PMAQI
5th Jul 2025475 PMAQI
5th Jul 2025486 PMAQI
5th Jul 2025487 PMAQI
5th Jul 2025478 PMAQI
5th Jul 2025519 PMAQI
5th Jul 20255210 PMAQI
5th Jul 20255011 PMAQI
6th Jul 20255012 AMAQI
6th Jul 2025521 AMAQI
6th Jul 2025522 AMAQI
6th Jul 2025523 AMAQI
6th Jul 2025524 AMAQI

25°C21/31°C

6th Jul 2025525 AMAQI
6th Jul 2025526 AMAQI
6th Jul 2025527 AMAQI
6th Jul 2025528 AMAQI
6th Jul 2025529 AMAQI
6th Jul 20255110 AMAQI
6th Jul 20255211 AMAQI
6th Jul 20255312 PMAQI
6th Jul 2025531 PMAQI
6th Jul 2025522 PMAQI
6th Jul 2025493 PMAQI
6th Jul 2025504 PMAQI
6th Jul 2025505 PMAQI
6th Jul 2025456 PMAQI
6th Jul 2025427 PMAQI
6th Jul 2025468 PMAQI
6th Jul 2025499 PMAQI
6th Jul 20254910 PMAQI
6th Jul 20255011 PMAQI
7th Jul 20255212 AMAQI
7th Jul 2025521 AMAQI
7th Jul 2025522 AMAQI
7th Jul 2025523 AMAQI
7th Jul 2025524 AMAQI

27°C22/32°C

7th Jul 2025525 AMAQI
7th Jul 2025526 AMAQI
7th Jul 2025527 AMAQI
7th Jul 2025528 AMAQI
7th Jul 2025589 AMAQI
7th Jul 20256410 AMAQI
7th Jul 20257111 AMAQI
7th Jul 20257212 PMAQI
7th Jul 2025681 PMAQI
7th Jul 2025652 PMAQI
7th Jul 2025713 PMAQI
7th Jul 2025724 PMAQI
7th Jul 2025715 PMAQI
7th Jul 2025706 PMAQI
7th Jul 2025687 PMAQI
7th Jul 2025628 PMAQI
7th Jul 2025539 PMAQI
7th Jul 20255410 PMAQI
7th Jul 20255411 PMAQI
8th Jul 20255312 AMAQI
8th Jul 2025531 AMAQI
8th Jul 2025532 AMAQI
8th Jul 2025523 AMAQI
8th Jul 2025534 AMAQI

28°C22/35°C

8th Jul 2025535 AMAQI
8th Jul 2025536 AMAQI
8th Jul 2025537 AMAQI
8th Jul 2025538 AMAQI
8th Jul 2025709 AMAQI
8th Jul 20257610 AMAQI
8th Jul 20258211 AMAQI
8th Jul 20258612 PMAQI
8th Jul 2025771 PMAQI
8th Jul 2025762 PMAQI
8th Jul 2025773 PMAQI
8th Jul 2025774 PMAQI
8th Jul 2025765 PMAQI
8th Jul 2025766 PMAQI
8th Jul 2025777 PMAQI
8th Jul 2025728 PMAQI
8th Jul 2025589 PMAQI
8th Jul 20255710 PMAQI
8th Jul 20255611 PMAQI
9th Jul 20255512 AMAQI
9th Jul 2025541 AMAQI
9th Jul 2025542 AMAQI
9th Jul 2025543 AMAQI
9th Jul 2025544 AMAQI

28°C24/36°C

9th Jul 2025555 AMAQI
9th Jul 2025556 AMAQI
9th Jul 2025557 AMAQI
9th Jul 2025558 AMAQI
9th Jul 2025629 AMAQI
9th Jul 20255710 AMAQI
9th Jul 20254511 AMAQI
9th Jul 20254512 PMAQI
9th Jul 2025511 PMAQI
9th Jul 2025502 PMAQI
9th Jul 2025523 PMAQI
9th Jul 2025514 PMAQI
9th Jul 2025525 PMAQI
9th Jul 2025526 PMAQI
9th Jul 2025537 PMAQI
9th Jul 2025548 PMAQI
9th Jul 2025559 PMAQI
9th Jul 20255510 PMAQI
9th Jul 20255511 PMAQI
10th Jul 20255712 AMAQI
10th Jul 2025571 AMAQI
10th Jul 2025562 AMAQI
10th Jul 2025553 AMAQI
10th Jul 2025554 AMAQI

29°C23/35°C

10th Jul 2025555 AMAQI
10th Jul 2025556 AMAQI
10th Jul 2025557 AMAQI
10th Jul 2025558 AMAQI
10th Jul 2025489 AMAQI
10th Jul 20254810 AMAQI
10th Jul 20254411 AMAQI
10th Jul 20254112 PMAQI
10th Jul 2025481 PMAQI
10th Jul 2025472 PMAQI
10th Jul 2025473 PMAQI
10th Jul 2025474 PMAQI
10th Jul 2025475 PMAQI
10th Jul 2025506 PMAQI
10th Jul 2025477 PMAQI
10th Jul 2025558 PMAQI
10th Jul 2025589 PMAQI
10th Jul 20256110 PMAQI
10th Jul 20255911 PMAQI
11th Jul 20255712 AMAQI
11th Jul 2025601 AMAQI
11th Jul 2025592 AMAQI
11th Jul 2025593 AMAQI
11th Jul 2025594 AMAQI

28°C23/34°C

11th Jul 2025595 AMAQI
11th Jul 2025586 AMAQI
11th Jul 2025557 AMAQI
11th Jul 2025568 AMAQI
11th Jul 2025429 AMAQI
11th Jul 20253910 AMAQI
11th Jul 20254711 AMAQI
11th Jul 20254412 PMAQI
11th Jul 2025501 PMAQI
11th Jul 2025472 PMAQI
11th Jul 2025513 PMAQI
11th Jul 2025544 PMAQI
11th Jul 2025555 PMAQI
11th Jul 2025556 PMAQI
11th Jul 2025557 PMAQI
11th Jul 2025558 PMAQI
11th Jul 2025569 PMAQI
11th Jul 20255610 PMAQI
11th Jul 20255611 PMAQI
12th Jul 20255612 AMAQI
12th Jul 2025561 AMAQI
12th Jul 2025582 AMAQI
12th Jul 2025583 AMAQI
12th Jul 2025574 AMAQI

27°C22/34°C

12th Jul 2025575 AMAQI
12th Jul 2025576 AMAQI
12th Jul 2025577 AMAQI
12th Jul 2025578 AMAQI
12th Jul 2025449 AMAQI
12th Jul 20254010 AMAQI
12th Jul 20254111 AMAQI
12th Jul 20254612 PMAQI
12th Jul 2025471 PMAQI
12th Jul 2025462 PMAQI
12th Jul 2025453 PMAQI
12th Jul 2025474 PMAQI
12th Jul 2025515 PMAQI
12th Jul 2025476 PMAQI
12th Jul 2025527 PMAQI
12th Jul 2025548 PMAQI
12th Jul 2025569 PMAQI
12th Jul 20255610 PMAQI
12th Jul 20255711 PMAQI
13th Jul 20255712 AMAQI
13th Jul 2025571 AMAQI
13th Jul 2025562 AMAQI
13th Jul 2025563 AMAQI
13th Jul 2025564 AMAQI

26°C20/33°C

13th Jul 2025565 AMAQI
13th Jul 2025566 AMAQI
13th Jul 2025567 AMAQI
13th Jul 2025568 AMAQI
13th Jul 2025619 AMAQI
13th Jul 20256610 AMAQI
13th Jul 20256711 AMAQI
13th Jul 20256612 PMAQI
13th Jul 2025651 PMAQI
13th Jul 2025652 PMAQI
13th Jul 2025693 PMAQI
13th Jul 2025704 PMAQI
13th Jul 2025735 PMAQI
13th Jul 2025716 PMAQI
13th Jul 2025717 PMAQI
13th Jul 2025718 PMAQI
13th Jul 2025609 PMAQI
13th Jul 20255910 PMAQI
13th Jul 20255711 PMAQI
14th Jul 20255712 AMAQI
14th Jul 2025561 AMAQI
14th Jul 2025562 AMAQI
14th Jul 2025563 AMAQI
14th Jul 2025564 AMAQI

23°C19/27°C

14th Jul 2025575 AMAQI
14th Jul 2025576 AMAQI
14th Jul 2025577 AMAQI
14th Jul 2025578 AMAQI
14th Jul 2025679 AMAQI
14th Jul 20257210 AMAQI
14th Jul 20256911 AMAQI
14th Jul 20257112 PMAQI
14th Jul 2025661 PMAQI
14th Jul 2025682 PMAQI
14th Jul 2025683 PMAQI
14th Jul 2025654 PMAQI
14th Jul 2025635 PMAQI
14th Jul 2025546 PMAQI
14th Jul 2025487 PMAQI
14th Jul 2025508 PMAQI
14th Jul 2025549 PMAQI
14th Jul 20255410 PMAQI
14th Jul 20255411 PMAQI
15th Jul 20255412 AMAQI
15th Jul 2025571 AMAQI
15th Jul 2025572 AMAQI
15th Jul 2025573 AMAQI
15th Jul 2025584 AMAQI

23°C19/29°C

15th Jul 2025585 AMAQI
15th Jul 2025586 AMAQI
15th Jul 2025587 AMAQI
15th Jul 2025588 AMAQI
15th Jul 2025299 AMAQI
15th Jul 20252010 AMAQI
15th Jul 20252311 AMAQI
15th Jul 20252412 PMAQI
15th Jul 2025361 PMAQI
15th Jul 2025392 PMAQI
15th Jul 2025403 PMAQI
15th Jul 2025404 PMAQI
15th Jul 2025425 PMAQI
15th Jul 2025396 PMAQI
15th Jul 2025377 PMAQI
15th Jul 2025408 PMAQI
15th Jul 2025529 PMAQI
15th Jul 20255210 PMAQI
15th Jul 20255411 PMAQI
16th Jul 20255512 AMAQI
16th Jul 2025561 AMAQI
16th Jul 2025572 AMAQI
16th Jul 2025563 AMAQI
16th Jul 2025564 AMAQI

22°C19/26°C

16th Jul 2025555 AMAQI
16th Jul 2025556 AMAQI
16th Jul 2025557 AMAQI
16th Jul 2025558 AMAQI
16th Jul 2025639 AMAQI
16th Jul 20256510 AMAQI
16th Jul 20256411 AMAQI
16th Jul 20255912 PMAQI
16th Jul 2025501 PMAQI
16th Jul 2025522 PMAQI
16th Jul 2025503 PMAQI
16th Jul 2025474 PMAQI
16th Jul 2025465 PMAQI
16th Jul 2025426 PMAQI
16th Jul 2025397 PMAQI
16th Jul 2025468 PMAQI
16th Jul 2025539 PMAQI
16th Jul 20255310 PMAQI
16th Jul 20255411 PMAQI
17th Jul 20255412 AMAQI
17th Jul 2025551 AMAQI
17th Jul 2025552 AMAQI
17th Jul 2025553 AMAQI
17th Jul 2025554 AMAQI

21°C19/24°C

17th Jul 2025565 AMAQI
17th Jul 2025566 AMAQI
17th Jul 2025557 AMAQI
17th Jul 2025558 AMAQI
17th Jul 2025279 AMAQI
17th Jul 20252110 AMAQI
17th Jul 20252311 AMAQI
17th Jul 20252112 PMAQI
17th Jul 2025311 PMAQI
17th Jul 2025282 PMAQI
17th Jul 2025313 PMAQI
17th Jul 2025304 PMAQI
17th Jul 2025305 PMAQI
17th Jul 2025306 PMAQI
17th Jul 2025337 PMAQI
17th Jul 2025378 PMAQI
17th Jul 2025519 PMAQI
17th Jul 20255110 PMAQI
17th Jul 20255111 PMAQI
18th Jul 20255212 AMAQI
18th Jul 2025541 AMAQI
18th Jul 2025552 AMAQI
18th Jul 2025553 AMAQI
18th Jul 2025544 AMAQI

23°C21/26°C

18th Jul 2025545 AMAQI
18th Jul 2025546 AMAQI
18th Jul 2025547 AMAQI
18th Jul 2025548 AMAQI
18th Jul 2025339 AMAQI
18th Jul 20252810 AMAQI
18th Jul 20252811 AMAQI
18th Jul 20253012 PMAQI
18th Jul 2025361 PMAQI
18th Jul 2025362 PMAQI
18th Jul 2025383 PMAQI
18th Jul 2025404 PMAQI
18th Jul 2025415 PMAQI
18th Jul 2025446 PMAQI
18th Jul 2025487 PMAQI
18th Jul 2025488 PMAQI
18th Jul 2025539 PMAQI
18th Jul 20255310 PMAQI
18th Jul 20255311 PMAQI
19th Jul 20255312 AMAQI
19th Jul 2025531 AMAQI
19th Jul 2025532 AMAQI
19th Jul 2025533 AMAQI
19th Jul 2025534 AMAQI

23°C22/25°C

19th Jul 2025525 AMAQI
19th Jul 2025526 AMAQI
19th Jul 2025527 AMAQI
19th Jul 2025528 AMAQI
19th Jul 2025239 AMAQI
19th Jul 20251510 AMAQI
19th Jul 20251611 AMAQI
19th Jul 20251712 PMAQI
19th Jul 2025221 PMAQI
19th Jul 2025252 PMAQI
19th Jul 2025273 PMAQI
19th Jul 2025314 PMAQI
19th Jul 2025275 PMAQI
19th Jul 2025296 PMAQI
19th Jul 2025307 PMAQI
19th Jul 2025368 PMAQI
19th Jul 2025459 PMAQI
19th Jul 20254410 PMAQI
19th Jul 20254211 PMAQI
20th Jul 20254212 AMAQI
20th Jul 2025501 AMAQI
20th Jul 2025532 AMAQI
20th Jul 2025533 AMAQI
20th Jul 2025524 AMAQI

25°C22/27°C

20th Jul 2025505 AMAQI
20th Jul 2025516 AMAQI
20th Jul 2025507 AMAQI
20th Jul 2025508 AMAQI
20th Jul 2025399 AMAQI
20th Jul 20253210 AMAQI
20th Jul 20253511 AMAQI
20th Jul 20253612 PMAQI
20th Jul 2025381 PMAQI
20th Jul 2025382 PMAQI
20th Jul 2025393 PMAQI
20th Jul 2025394 PMAQI
20th Jul 2025445 PMAQI
20th Jul 2025476 PMAQI
20th Jul 2025517 PMAQI
20th Jul 2025508 PMAQI
20th Jul 2025509 PMAQI
20th Jul 20255010 PMAQI
20th Jul 20255111 PMAQI
21st Jul 20255212 AMAQI
21st Jul 2025521 AMAQI
21st Jul 2025512 AMAQI
21st Jul 2025513 AMAQI
21st Jul 2025504 AMAQI

26°C22/32°C

21st Jul 2025485 AMAQI
21st Jul 2025496 AMAQI
21st Jul 2025487 AMAQI
21st Jul 2025488 AMAQI
21st Jul 2025519 AMAQI
21st Jul 20255410 AMAQI
21st Jul 20254911 AMAQI
21st Jul 20254712 PMAQI
21st Jul 2025391 PMAQI
21st Jul 2025382 PMAQI
21st Jul 2025383 PMAQI
21st Jul 2025364 PMAQI
21st Jul 2025325 PMAQI
21st Jul 2025316 PMAQI
21st Jul 2025307 PMAQI
21st Jul 2025338 PMAQI
21st Jul 2025419 PMAQI
21st Jul 20254210 PMAQI
21st Jul 20254211 PMAQI
22nd Jul 20254112 AMAQI
22nd Jul 2025461 AMAQI
22nd Jul 2025492 AMAQI
22nd Jul 2025503 AMAQI
22nd Jul 2025504 AMAQI

27°C23/31°C

22nd Jul 2025505 AMAQI
22nd Jul 2025506 AMAQI
22nd Jul 2025507 AMAQI
22nd Jul 2025508 AMAQI
22nd Jul 2025319 AMAQI
22nd Jul 20252910 AMAQI
22nd Jul 20253311 AMAQI
22nd Jul 20253112 PMAQI
22nd Jul 2025331 PMAQI
22nd Jul 2025322 PMAQI
22nd Jul 2025303 PMAQI
22nd Jul 2025304 PMAQI
22nd Jul 2025325 PMAQI
22nd Jul 2025346 PMAQI
22nd Jul 2025347 PMAQI
22nd Jul 2025378 PMAQI
22nd Jul 2025469 PMAQI
22nd Jul 20254510 PMAQI
22nd Jul 20254511 PMAQI
23rd Jul 20254412 AMAQI
23rd Jul 2025441 AMAQI
23rd Jul 2025452 AMAQI
23rd Jul 2025493 AMAQI
23rd Jul 2025484 AMAQI

26°C22/31°C

23rd Jul 2025465 AMAQI
23rd Jul 2025466 AMAQI
23rd Jul 2025467 AMAQI
23rd Jul 2025468 AMAQI
23rd Jul 2025449 AMAQI
23rd Jul 20254410 AMAQI
23rd Jul 20254811 AMAQI
23rd Jul 20255312 PMAQI
23rd Jul 2025541 PMAQI
23rd Jul 2025552 PMAQI
23rd Jul 2025553 PMAQI
23rd Jul 2025554 PMAQI
23rd Jul 2025545 PMAQI
23rd Jul 2025546 PMAQI
23rd Jul 2025537 PMAQI
23rd Jul 2025448 PMAQI
23rd Jul 2025469 PMAQI
23rd Jul 20254610 PMAQI
23rd Jul 20254811 PMAQI
24th Jul 20254912 AMAQI
24th Jul 2025471 AMAQI
24th Jul 2025462 AMAQI
24th Jul 2025463 AMAQI
24th Jul 2025474 AMAQI

26°C22/32°C

24th Jul 2025485 AMAQI
24th Jul 2025486 AMAQI
24th Jul 2025487 AMAQI
24th Jul 2025488 AMAQI
24th Jul 2025499 AMAQI
24th Jul 20255310 AMAQI
24th Jul 20255311 AMAQI
24th Jul 20255612 PMAQI
24th Jul 2025571 PMAQI
24th Jul 2025612 PMAQI
24th Jul 2025633 PMAQI
24th Jul 2025624 PMAQI
24th Jul 2025645 PMAQI
24th Jul 2025636 PMAQI
24th Jul 2025637 PMAQI
24th Jul 2025608 PMAQI
24th Jul 2025569 PMAQI
24th Jul 20255810 PMAQI
24th Jul 20255711 PMAQI
25th Jul 20255712 AMAQI
25th Jul 2025571 AMAQI
25th Jul 2025522 AMAQI
25th Jul 2025473 AMAQI
25th Jul 2025494 AMAQI

27°C22/34°C

25th Jul 2025525 AMAQI
25th Jul 2025526 AMAQI
25th Jul 2025517 AMAQI
25th Jul 2025518 AMAQI
25th Jul 2025719 AMAQI
25th Jul 20258010 AMAQI
25th Jul 20258111 AMAQI
25th Jul 20257612 PMAQI
25th Jul 2025691 PMAQI
25th Jul 2025662 PMAQI
25th Jul 2025713 PMAQI
25th Jul 2025724 PMAQI
25th Jul 2025745 PMAQI
25th Jul 2025766 PMAQI
25th Jul 2025757 PMAQI
25th Jul 2025758 PMAQI
25th Jul 2025629 PMAQI
25th Jul 20256210 PMAQI
25th Jul 20256211 PMAQI
26th Jul 20256112 AMAQI
26th Jul 2025531 AMAQI
26th Jul 2025522 AMAQI
26th Jul 2025533 AMAQI
26th Jul 2025544 AMAQI

28°C23/35°C

26th Jul 2025555 AMAQI
26th Jul 2025556 AMAQI
26th Jul 2025567 AMAQI
26th Jul 2025558 AMAQI
26th Jul 2025589 AMAQI
26th Jul 20255310 AMAQI
26th Jul 20254311 AMAQI
26th Jul 20254612 PMAQI
26th Jul 2025531 PMAQI
26th Jul 2025522 PMAQI
26th Jul 2025533 PMAQI
26th Jul 2025574 PMAQI
26th Jul 2025575 PMAQI
26th Jul 2025646 PMAQI
26th Jul 2025737 PMAQI
26th Jul 2025708 PMAQI
26th Jul 2025639 PMAQI
26th Jul 20256210 PMAQI
26th Jul 20256211 PMAQI
27th Jul 20255912 AMAQI
27th Jul 2025551 AMAQI
27th Jul 2025552 AMAQI
27th Jul 2025553 AMAQI
27th Jul 2025554 AMAQI

29°C24/35°C

27th Jul 2025545 AMAQI
27th Jul 2025556 AMAQI
27th Jul 2025557 AMAQI
27th Jul 2025558 AMAQI
27th Jul 2025499 AMAQI
27th Jul 20254010 AMAQI
27th Jul 20252911 AMAQI
27th Jul 20252712 PMAQI
27th Jul 2025341 PMAQI
27th Jul 2025382 PMAQI
27th Jul 2025403 PMAQI
27th Jul 2025344 PMAQI
27th Jul 2025435 PMAQI
27th Jul 2025466 PMAQI
27th Jul 2025497 PMAQI
27th Jul 2025548 PMAQI
27th Jul 2025569 PMAQI
27th Jul 20255810 PMAQI
27th Jul 20255811 PMAQI
28th Jul 20255812 AMAQI
28th Jul 2025561 AMAQI
28th Jul 2025562 AMAQI
28th Jul 2025563 AMAQI
28th Jul 2025554 AMAQI

29°C24/36°C

28th Jul 2025545 AMAQI
28th Jul 2025546 AMAQI
28th Jul 2025547 AMAQI
28th Jul 2025548 AMAQI
28th Jul 2025679 AMAQI
28th Jul 20256910 AMAQI
28th Jul 20255811 AMAQI
28th Jul 20255712 PMAQI
28th Jul 2025561 PMAQI
28th Jul 2025552 PMAQI
28th Jul 2025503 PMAQI
28th Jul 2025534 PMAQI
28th Jul 2025565 PMAQI
28th Jul 2025636 PMAQI
28th Jul 2025627 PMAQI
28th Jul 2025608 PMAQI
28th Jul 2025559 PMAQI
28th Jul 20255510 PMAQI
28th Jul 20255611 PMAQI
29th Jul 20255712 AMAQI
29th Jul 2025561 AMAQI
29th Jul 2025562 AMAQI
29th Jul 2025563 AMAQI
29th Jul 2025564 AMAQI

28°C24/34°C

29th Jul 2025575 AMAQI
29th Jul 2025566 AMAQI
29th Jul 2025577 AMAQI
29th Jul 2025578 AMAQI
29th Jul 2025689 AMAQI
29th Jul 20257410 AMAQI
29th Jul 20257411 AMAQI
29th Jul 20257412 PMAQI
29th Jul 2025711 PMAQI
29th Jul 2025722 PMAQI
29th Jul 2025673 PMAQI
29th Jul 2025614 PMAQI
29th Jul 2025625 PMAQI
29th Jul 2025626 PMAQI
29th Jul 2025707 PMAQI
29th Jul 2025688 PMAQI
29th Jul 2025619 PMAQI
29th Jul 20256110 PMAQI
29th Jul 20256211 PMAQI
30th Jul 20256112 AMAQI
30th Jul 2025561 AMAQI
30th Jul 2025562 AMAQI
30th Jul 2025563 AMAQI
30th Jul 2025574 AMAQI

28°C23/35°C

30th Jul 2025585 AMAQI
30th Jul 2025586 AMAQI
30th Jul 2025587 AMAQI
30th Jul 2025588 AMAQI
30th Jul 2025749 AMAQI
30th Jul 20258110 AMAQI
30th Jul 20258511 AMAQI
30th Jul 20258612 PMAQI
30th Jul 2025801 PMAQI
30th Jul 2025762 PMAQI
30th Jul 2025723 PMAQI
30th Jul 2025674 PMAQI
30th Jul 2025575 PMAQI
30th Jul 2025536 PMAQI
30th Jul 2025547 PMAQI
30th Jul 2025608 PMAQI
30th Jul 2025609 PMAQI
30th Jul 20256210 PMAQI
30th Jul 20256311 PMAQI
31st Jul 20256212 AMAQI
31st Jul 2025581 AMAQI
31st Jul 2025582 AMAQI
31st Jul 2025583 AMAQI
31st Jul 2025584 AMAQI

28°C23/35°C

31st Jul 2025585 AMAQI
31st Jul 2025586 AMAQI
31st Jul 2025587 AMAQI
31st Jul 2025588 AMAQI
31st Jul 2025589 AMAQI
31st Jul 20255810 AMAQI
31st Jul 20256211 AMAQI
31st Jul 20255912 PMAQI
31st Jul 2025581 PMAQI
31st Jul 2025632 PMAQI
31st Jul 2025603 PMAQI
31st Jul 2025604 PMAQI
31st Jul 2025575 PMAQI
31st Jul 2025586 PMAQI
31st Jul 2025577 PMAQI
31st Jul 2025578 PMAQI
31st Jul 2025549 PMAQI
31st Jul 20255410 PMAQI
31st Jul 20255511 PMAQI
1st Aug 20255612 AMAQI
1st Aug 2025551 AMAQI
1st Aug 2025552 AMAQI
1st Aug 2025553 AMAQI
1st Aug 2025564 AMAQI

27°C24/33°C

1st Aug 2025565 AMAQI
1st Aug 2025566 AMAQI
1st Aug 2025567 AMAQI
1st Aug 2025558 AMAQI
1st Aug 2025579 AMAQI
1st Aug 20256210 AMAQI
1st Aug 20255811 AMAQI
1st Aug 20255912 PMAQI
1st Aug 2025551 PMAQI
1st Aug 2025602 PMAQI
1st Aug 2025613 PMAQI
1st Aug 2025594 PMAQI
1st Aug 2025605 PMAQI
1st Aug 2025596 PMAQI
1st Aug 2025597 PMAQI
1st Aug 2025588 PMAQI
1st Aug 2025609 PMAQI
1st Aug 20256110 PMAQI
1st Aug 20255911 PMAQI
2nd Aug 20256012 AMAQI
2nd Aug 2025541 AMAQI
2nd Aug 2025552 AMAQI
2nd Aug 2025553 AMAQI
2nd Aug 2025554 AMAQI

27°C23/34°C

2nd Aug 2025555 AMAQI
2nd Aug 2025556 AMAQI
2nd Aug 2025567 AMAQI
2nd Aug 2025558 AMAQI
2nd Aug 2025749 AMAQI
2nd Aug 20257810 AMAQI
2nd Aug 20257311 AMAQI
2nd Aug 20258112 PMAQI
2nd Aug 2025781 PMAQI
2nd Aug 2025632 PMAQI
2nd Aug 2025563 PMAQI
2nd Aug 2025594 PMAQI
2nd Aug 2025585 PMAQI
2nd Aug 2025666 PMAQI
2nd Aug 2025627 PMAQI
2nd Aug 2025578 PMAQI
2nd Aug 2025609 PMAQI
2nd Aug 20256010 PMAQI
2nd Aug 20256011 PMAQI
3rd Aug 20255712 AMAQI
3rd Aug 2025541 AMAQI

--°C/°C

5 AM
12 PM
7 PM
12 AM
4 AM

--°C/°C

Day time
Avg. Highest Time
5 AM - 7 PM

53AQI

15 hours / Day
450 hours / Month
Avg. Lowest Time
5 AM - 7 PM

53AQI

15 hours / Day
450 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 7 PM (Avg. 53), while the lowest AQI was between 5 AM to 7 PM (Avg. 53).
Night time
Avg. Highest Time
12 AM - 11 PM

54AQI

9 hours / Day
270 hours / Month
Avg. Lowest Time
12 AM - 11 PM

54AQI

9 hours / Day
270 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 54), while the lowest AQI was between 12 AM to 11 PM (Avg. 54).

2025 Days Vs Air Quality

Hongseong, Chungnam, South Korea

2025

22%

47

70%

150

8%

16

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

Good
47 Days
Moderate
150 Days
Poor
16 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 22%

Health Risk Level:

Very high

In 2025, 22% of 214 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

Hongseong, Chungnam, 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.

1st January 2025
72AQI
2nd January 2025
60AQI
3rd January 2025
58AQI
4th January 2025
58AQI
5th January 2025
66AQI
6th January 2025
78AQI
7th January 2025
54AQI
8th January 2025
60AQI
9th January 2025
39AQI
10th January 2025
59AQI
11th January 2025
62AQI
12th January 2025
78AQI
13th January 2025
84AQI
14th January 2025
90AQI
15th January 2025
53AQI
16th January 2025
66AQI
17th January 2025
73AQI
18th January 2025
73AQI
19th January 2025
75AQI
20th January 2025
115AQI
21st January 2025
125AQI
22nd January 2025
132AQI
23rd January 2025
110AQI
24th January 2025
118AQI
25th January 2025
85AQI
26th January 2025
63AQI
27th January 2025
64AQI
28th January 2025
51AQI
29th January 2025
52AQI
30th January 2025
57AQI
31st January 2025
77AQI
1st February 2025
101AQI
2nd February 2025
101AQI
3rd February 2025
58AQI
4th February 2025
51AQI
5th February 2025
44AQI
6th February 2025
52AQI
7th February 2025
45AQI
8th February 2025
41AQI
9th February 2025
50AQI
10th February 2025
56AQI
11th February 2025
76AQI
12th February 2025
66AQI
13th February 2025
51AQI
14th February 2025
75AQI
15th February 2025
57AQI
16th February 2025
106AQI
17th February 2025
50AQI
18th February 2025
58AQI
19th February 2025
45AQI
20th February 2025
51AQI
21st February 2025
51AQI
22nd February 2025
56AQI
23rd February 2025
51AQI
24th February 2025
50AQI
25th February 2025
51AQI
26th February 2025
74AQI
27th February 2025
58AQI
28th February 2025
76AQI
1st March 2025
106AQI
2nd March 2025
82AQI
3rd March 2025
56AQI
4th March 2025
47AQI
5th March 2025
41AQI
6th March 2025
75AQI
7th March 2025
82AQI
8th March 2025
84AQI
9th March 2025
110AQI
10th March 2025
105AQI
11th March 2025
103AQI
12th March 2025
96AQI
13th March 2025
86AQI
14th March 2025
84AQI
15th March 2025
59AQI
16th March 2025
72AQI
17th March 2025
63AQI
18th March 2025
80AQI
19th March 2025
80AQI
20th March 2025
95AQI
21st March 2025
98AQI
22nd March 2025
111AQI
23rd March 2025
117AQI
24th March 2025
114AQI
25th March 2025
129AQI
26th March 2025
93AQI
27th March 2025
91AQI
28th March 2025
57AQI
29th March 2025
49AQI
30th March 2025
48AQI
31st March 2025
63AQI
1st April 2025
74AQI
2nd April 2025
79AQI
3rd April 2025
86AQI
4th April 2025
81AQI
5th April 2025
76AQI
6th April 2025
66AQI
7th April 2025
73AQI
8th April 2025
75AQI
9th April 2025
67AQI
10th April 2025
74AQI
11th April 2025
83AQI
12th April 2025
65AQI
13th April 2025
63AQI
14th April 2025
45AQI
15th April 2025
60AQI
16th April 2025
62AQI
17th April 2025
71AQI
18th April 2025
83AQI
19th April 2025
49AQI
20th April 2025
71AQI
21st April 2025
58AQI
22nd April 2025
48AQI
23rd April 2025
44AQI
24th April 2025
65AQI
25th April 2025
58AQI
26th April 2025
50AQI
27th April 2025
40AQI
28th April 2025
58AQI
29th April 2025
63AQI
30th April 2025
57AQI
1st May 2025
57AQI
2nd May 2025
51AQI
3rd May 2025
53AQI
4th May 2025
47AQI
5th May 2025
51AQI
6th May 2025
48AQI
7th May 2025
52AQI
8th May 2025
60AQI
9th May 2025
50AQI
10th May 2025
60AQI
11th May 2025
70AQI
12th May 2025
69AQI
13th May 2025
74AQI
14th May 2025
71AQI
15th May 2025
57AQI
16th May 2025
50AQI
17th May 2025
41AQI
18th May 2025
58AQI
19th May 2025
58AQI
20th May 2025
38AQI
21st May 2025
50AQI
22nd May 2025
52AQI
23rd May 2025
58AQI
24th May 2025
54AQI
25th May 2025
49AQI
26th May 2025
64AQI
27th May 2025
70AQI
28th May 2025
74AQI
29th May 2025
79AQI
30th May 2025
82AQI
31st May 2025
87AQI
1st June 2025
85AQI
2nd June 2025
97AQI
3rd June 2025
74AQI
4th June 2025
61AQI
5th June 2025
55AQI
6th June 2025
59AQI
7th June 2025
68AQI
8th June 2025
61AQI
9th June 2025
64AQI
10th June 2025
55AQI
11th June 2025
54AQI
12th June 2025
59AQI
13th June 2025
66AQI
14th June 2025
55AQI
15th June 2025
59AQI
16th June 2025
62AQI
17th June 2025
62AQI
18th June 2025
63AQI
19th June 2025
64AQI
20th June 2025
50AQI
21st June 2025
48AQI
22nd June 2025
47AQI
23rd June 2025
55AQI
24th June 2025
57AQI
25th June 2025
46AQI
26th June 2025
49AQI
27th June 2025
61AQI
28th June 2025
56AQI
29th June 2025
48AQI
30th June 2025
47AQI
1st July 2025
45AQI
2nd July 2025
49AQI
3rd July 2025
53AQI
4th July 2025
50AQI
5th July 2025
49AQI
6th July 2025
50AQI
7th July 2025
59AQI
8th July 2025
63AQI
9th July 2025
54AQI
10th July 2025
53AQI
11th July 2025
54AQI
12th July 2025
53AQI
13th July 2025
62AQI
14th July 2025
59AQI
15th July 2025
47AQI
16th July 2025
53AQI
17th July 2025
44AQI
18th July 2025
47AQI
19th July 2025
40AQI
20th July 2025
46AQI
21st July 2025
44AQI
22nd July 2025
41AQI
23rd July 2025
48AQI
24th July 2025
54AQI
25th July 2025
63AQI
26th July 2025
58AQI
27th July 2025
50AQI
28th July 2025
57AQI
29th July 2025
62AQI
30th July 2025
63AQI
31st July 2025
58AQI
1st August 2025
57AQI

74AQI

61AQI

83AQI

65AQI

59AQI

60AQI

53AQI

57AQI

No. of days

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

202565AQI

1
25
5
7
18
3
4
19
8
6
24
8
23
7
23
14
17
1
47
150
16

Highest AQI recorded in

March

83AQI

Lowest AQI recorded in

July

53AQI

202465AQI

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 recorded in

January

82AQI

Lowest AQI recorded in

July

43AQI

202367AQI

7
16
6
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
17
6
1
95
225
37
7

Highest AQI recorded in

February

91AQI

Lowest AQI recorded in

September

52AQI

202269AQI

3
22
4
2
3
12
5
2
5
19
7
5
23
2
6
24
1
15
15
7
17
3
16
13
11
15
5
3
20
7
6
22
3
83
202
34
4

Highest AQI recorded in

February

86AQI

Lowest AQI recorded in

August

42AQI

202170AQI

4
20
7
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
7
20
3
11
9
11
103
212
41
5
3
1

Highest AQI recorded in

March

110AQI

Lowest AQI recorded in

September

41AQI

202065AQI

3
8
2
21
2
15
1
5
25
16
15
18
13
17
13
7
21
3
6
16
7
1
4
18
8
1
78
165
21
2

Highest AQI recorded in

December

85AQI

Lowest AQI recorded in

September

48AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2021(Avg.)
70AQI
Least Polluted Year Recorded
2024(Avg.)
65AQI

Hongseong's annual 2025 AQI (65) shows an average percentage change of -3.2% (improved AQI) compared to previous years: 2020 (65), 2021 (70), 2022 (69), 2023 (67), 2024 (65).