Cheonan, Chonan, 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
Cheonan, Chonan, Chungnam, South Korea
2022
2023
2024
2025
2026
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
2nd Aug 2023
72AQILowest AQI recorded on
9th Aug 2026
11AQISame Day Analysis (14th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 35 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.
Day & Night AQI Trend: 14th Aug - 15th Aug 2026
Cheonan, Chonan, Chungnam, South Korea
AQI
Day
Night
.
5 AM14th Aug 2026
7 PM
4 AM15th Aug 2026
Day time
Avg. Highest Time
11AM14th Aug
53AQI
Avg. Lowest Time
6PM14th Aug
14AQI
Night time
Avg. Highest Time
4AM15th Aug
74AQI
Avg. Lowest Time
11PM14th Aug
26AQI
In the last 24 hours,
Cheonan's AQI reached its highest point of 74 at 4 AM during the Night, while the lowest point, 14, was recorded at 6 PM during the Day between 14th Aug and 15th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Cheonan, Chonan, Chungnam, South Korea
JulAug
17th - 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 - 15th15th
Day
Night
17th Jul 2026575 AMAQI
17th Jul 2026556 AMAQI
17th Jul 2026577 AMAQI
17th Jul 2026588 AMAQI
17th Jul 2026599 AMAQI
17th Jul 20265810 AMAQI
17th Jul 20266211 AMAQI
17th Jul 20266212 PMAQI
17th Jul 2026761 PMAQI
17th Jul 2026732 PMAQI
17th Jul 2026643 PMAQI
17th Jul 2026684 PMAQI
17th Jul 2026705 PMAQI
17th Jul 2026656 PMAQI
17th Jul 2026647 PMAQI
17th Jul 2026598 PMAQI
17th Jul 2026609 PMAQI
17th Jul 20266210 PMAQI
17th Jul 20266211 PMAQI
18th Jul 20265712 AMAQI
18th Jul 2026511 AMAQI
18th Jul 2026502 AMAQI
18th Jul 2026523 AMAQI
18th Jul 2026444 AMAQI
24°C22/28°C
18th Jul 2026365 AMAQI
18th Jul 2026296 AMAQI
18th Jul 2026317 AMAQI
18th Jul 2026368 AMAQI
18th Jul 2026429 AMAQI
18th Jul 20264810 AMAQI
18th Jul 20265111 AMAQI
18th Jul 20264612 PMAQI
18th Jul 2026381 PMAQI
18th Jul 2026402 PMAQI
18th Jul 2026403 PMAQI
18th Jul 2026384 PMAQI
18th Jul 2026315 PMAQI
18th Jul 2026336 PMAQI
18th Jul 2026277 PMAQI
18th Jul 2026258 PMAQI
18th Jul 2026129 PMAQI
18th Jul 20262310 PMAQI
18th Jul 20261211 PMAQI
19th Jul 20262712 AMAQI
19th Jul 2026331 AMAQI
19th Jul 2026332 AMAQI
19th Jul 2026293 AMAQI
19th Jul 2026234 AMAQI
25°C24/26°C
19th Jul 2026305 AMAQI
19th Jul 2026286 AMAQI
19th Jul 2026317 AMAQI
19th Jul 2026338 AMAQI
19th Jul 2026389 AMAQI
19th Jul 20263610 AMAQI
19th Jul 20263111 AMAQI
19th Jul 20263612 PMAQI
19th Jul 2026381 PMAQI
19th Jul 2026402 PMAQI
19th Jul 2026383 PMAQI
19th Jul 2026314 PMAQI
19th Jul 2026295 PMAQI
19th Jul 2026296 PMAQI
19th Jul 2026317 PMAQI
19th Jul 2026278 PMAQI
19th Jul 2026279 PMAQI
19th Jul 20263110 PMAQI
19th Jul 20263111 PMAQI
20th Jul 20262912 AMAQI
20th Jul 2026331 AMAQI
20th Jul 2026362 AMAQI
20th Jul 2026383 AMAQI
20th Jul 2026554 AMAQI
24°C23/25°C
20th Jul 2026485 AMAQI
20th Jul 2026506 AMAQI
20th Jul 2026547 AMAQI
20th Jul 2026498 AMAQI
20th Jul 2026389 AMAQI
20th Jul 20263410 AMAQI
20th Jul 20262311 AMAQI
20th Jul 20262712 PMAQI
20th Jul 2026271 PMAQI
20th Jul 2026252 PMAQI
20th Jul 2026363 PMAQI
20th Jul 2026404 PMAQI
20th Jul 2026425 PMAQI
20th Jul 2026466 PMAQI
20th Jul 2026557 PMAQI
20th Jul 2026468 PMAQI
20th Jul 2026469 PMAQI
20th Jul 20263810 PMAQI
20th Jul 20264011 PMAQI
21st Jul 20264412 AMAQI
21st Jul 2026311 AMAQI
21st Jul 2026212 AMAQI
21st Jul 2026213 AMAQI
21st Jul 2026214 AMAQI
25°C21/30°C
21st Jul 2026295 AMAQI
21st Jul 2026236 AMAQI
21st Jul 2026277 AMAQI
21st Jul 2026298 AMAQI
21st Jul 2026259 AMAQI
21st Jul 20262510 AMAQI
21st Jul 20262511 AMAQI
21st Jul 2026361 PMAQI
21st Jul 2026332 PMAQI
21st Jul 2026403 PMAQI
21st Jul 2026504 PMAQI
21st Jul 2026405 PMAQI
21st Jul 2026256 PMAQI
21st Jul 2026727 PMAQI
21st Jul 2026258 PMAQI
21st Jul 2026369 PMAQI
21st Jul 20263310 PMAQI
21st Jul 20264211 PMAQI
22nd Jul 20264212 AMAQI
22nd Jul 2026421 AMAQI
22nd Jul 2026422 AMAQI
22nd Jul 2026363 AMAQI
22nd Jul 2026364 AMAQI
25°C23/28°C
22nd Jul 2026365 AMAQI
22nd Jul 2026316 AMAQI
22nd Jul 2026257 AMAQI
22nd Jul 2026218 AMAQI
22nd Jul 2026199 AMAQI
22nd Jul 20262710 AMAQI
22nd Jul 20263611 AMAQI
22nd Jul 20266312 PMAQI
22nd Jul 2026591 PMAQI
22nd Jul 2026522 PMAQI
22nd Jul 2026463 PMAQI
22nd Jul 2026484 PMAQI
22nd Jul 2026295 PMAQI
22nd Jul 2026506 PMAQI
22nd Jul 2026427 PMAQI
22nd Jul 2026448 PMAQI
22nd Jul 2026409 PMAQI
22nd Jul 20263810 PMAQI
22nd Jul 20263811 PMAQI
23rd Jul 20264212 AMAQI
23rd Jul 2026401 AMAQI
23rd Jul 2026422 AMAQI
23rd Jul 2026403 AMAQI
23rd Jul 2026364 AMAQI
27°C24/31°C
23rd Jul 2026405 AMAQI
23rd Jul 2026386 AMAQI
23rd Jul 2026427 AMAQI
23rd Jul 2026388 AMAQI
23rd Jul 2026409 AMAQI
23rd Jul 20264210 AMAQI
23rd Jul 20265011 AMAQI
23rd Jul 20265212 PMAQI
23rd Jul 2026531 PMAQI
23rd Jul 2026552 PMAQI
23rd Jul 2026603 PMAQI
23rd Jul 2026664 PMAQI
23rd Jul 2026665 PMAQI
23rd Jul 2026426 PMAQI
23rd Jul 2026257 PMAQI
23rd Jul 2026408 PMAQI
23rd Jul 2026429 PMAQI
23rd Jul 20264410 PMAQI
23rd Jul 20264911 PMAQI
24th Jul 20264112 AMAQI
24th Jul 2026291 AMAQI
24th Jul 2026302 AMAQI
24th Jul 2026303 AMAQI
24th Jul 2026364 AMAQI
26°C23/31°C
24th Jul 2026365 AMAQI
24th Jul 2026316 AMAQI
24th Jul 2026317 AMAQI
24th Jul 2026398 AMAQI
24th Jul 2026539 AMAQI
24th Jul 20265010 AMAQI
24th Jul 20265311 AMAQI
24th Jul 20265412 PMAQI
24th Jul 2026401 PMAQI
24th Jul 2026402 PMAQI
24th Jul 2026273 PMAQI
24th Jul 2026274 PMAQI
24th Jul 2026235 PMAQI
24th Jul 2026216 PMAQI
24th Jul 2026217 PMAQI
24th Jul 2026258 PMAQI
24th Jul 2026219 PMAQI
24th Jul 20262110 PMAQI
24th Jul 20261811 PMAQI
25th Jul 20261912 AMAQI
25th Jul 2026251 AMAQI
25th Jul 2026252 AMAQI
25th Jul 2026383 AMAQI
25th Jul 2026564 AMAQI
27°C22/33°C
25th Jul 2026335 AMAQI
25th Jul 2026336 AMAQI
25th Jul 2026197 AMAQI
25th Jul 2026198 AMAQI
25th Jul 2026299 AMAQI
25th Jul 20262710 AMAQI
25th Jul 20262711 AMAQI
25th Jul 20262412 PMAQI
25th Jul 2026151 PMAQI
25th Jul 2026102 PMAQI
25th Jul 2026123 PMAQI
25th Jul 2026194 PMAQI
25th Jul 2026255 PMAQI
25th Jul 2026216 PMAQI
25th Jul 2026257 PMAQI
25th Jul 2026218 PMAQI
25th Jul 2026239 PMAQI
25th Jul 20262310 PMAQI
25th Jul 20262911 PMAQI
26th Jul 20262912 AMAQI
26th Jul 2026271 AMAQI
26th Jul 2026322 AMAQI
26th Jul 2026323 AMAQI
26th Jul 2026234 AMAQI
27°C23/31°C
26th Jul 2026255 AMAQI
26th Jul 2026256 AMAQI
26th Jul 2026217 AMAQI
26th Jul 2026218 AMAQI
26th Jul 2026239 AMAQI
26th Jul 20262910 AMAQI
26th Jul 20264011 AMAQI
26th Jul 20263312 PMAQI
26th Jul 2026361 PMAQI
26th Jul 2026332 PMAQI
26th Jul 2026193 PMAQI
26th Jul 2026194 PMAQI
26th Jul 2026215 PMAQI
26th Jul 2026216 PMAQI
26th Jul 2026217 PMAQI
26th Jul 2026218 PMAQI
26th Jul 2026239 PMAQI
26th Jul 20262510 PMAQI
26th Jul 20262311 PMAQI
27th Jul 20262512 AMAQI
27th Jul 2026291 AMAQI
27th Jul 2026272 AMAQI
27th Jul 2026293 AMAQI
27th Jul 2026404 AMAQI
27°C23/32°C
27th Jul 2026505 AMAQI
27th Jul 2026426 AMAQI
27th Jul 2026387 AMAQI
27th Jul 2026388 AMAQI
27th Jul 2026369 AMAQI
27th Jul 20262510 AMAQI
27th Jul 20262711 AMAQI
27th Jul 20263212 PMAQI
27th Jul 2026231 PMAQI
27th Jul 2026212 PMAQI
27th Jul 2026213 PMAQI
27th Jul 2026274 PMAQI
27th Jul 2026275 PMAQI
27th Jul 2026256 PMAQI
27th Jul 2026217 PMAQI
27th Jul 2026238 PMAQI
27th Jul 2026239 PMAQI
27th Jul 20262710 PMAQI
27th Jul 20263311 PMAQI
28th Jul 20262512 AMAQI
28th Jul 2026291 AMAQI
28th Jul 2026312 AMAQI
28th Jul 2026403 AMAQI
28th Jul 2026274 AMAQI
27°C24/33°C
28th Jul 2026255 AMAQI
28th Jul 2026386 AMAQI
28th Jul 2026407 AMAQI
28th Jul 2026388 AMAQI
28th Jul 2026319 AMAQI
28th Jul 20264610 AMAQI
28th Jul 20265511 AMAQI
28th Jul 20265412 PMAQI
28th Jul 2026581 PMAQI
28th Jul 2026542 PMAQI
28th Jul 2026563 PMAQI
28th Jul 2026594 PMAQI
28th Jul 2026595 PMAQI
28th Jul 2026636 PMAQI
28th Jul 2026597 PMAQI
28th Jul 2026568 PMAQI
28th Jul 2026409 PMAQI
28th Jul 20262710 PMAQI
28th Jul 20261611 PMAQI
29th Jul 20261112 AMAQI
29th Jul 2026161 AMAQI
29th Jul 2026272 AMAQI
29th Jul 2026293 AMAQI
29th Jul 2026334 AMAQI
27°C23/31°C
29th Jul 2026315 AMAQI
29th Jul 2026296 AMAQI
29th Jul 2026297 AMAQI
29th Jul 2026368 AMAQI
29th Jul 2026259 AMAQI
29th Jul 20262310 AMAQI
29th Jul 20262511 AMAQI
29th Jul 20262912 PMAQI
29th Jul 2026211 PMAQI
29th Jul 2026212 PMAQI
29th Jul 2026233 PMAQI
29th Jul 2026234 PMAQI
29th Jul 2026235 PMAQI
29th Jul 2026216 PMAQI
29th Jul 2026237 PMAQI
29th Jul 2026218 PMAQI
29th Jul 2026219 PMAQI
29th Jul 20262710 PMAQI
29th Jul 20262311 PMAQI
30th Jul 20262512 AMAQI
30th Jul 2026291 AMAQI
30th Jul 2026272 AMAQI
30th Jul 2026293 AMAQI
30th Jul 2026294 AMAQI
26°C23/31°C
30th Jul 2026295 AMAQI
30th Jul 2026296 AMAQI
30th Jul 2026217 AMAQI
30th Jul 2026238 AMAQI
30th Jul 2026219 AMAQI
30th Jul 20262310 AMAQI
30th Jul 20262911 AMAQI
30th Jul 20262912 PMAQI
30th Jul 2026271 PMAQI
30th Jul 2026332 PMAQI
30th Jul 2026213 PMAQI
30th Jul 2026214 PMAQI
30th Jul 2026235 PMAQI
30th Jul 2026276 PMAQI
30th Jul 2026337 PMAQI
30th Jul 2026428 PMAQI
30th Jul 2026309 PMAQI
30th Jul 20263310 PMAQI
30th Jul 20262511 PMAQI
31st Jul 20262912 AMAQI
31st Jul 2026211 AMAQI
31st Jul 2026272 AMAQI
31st Jul 2026253 AMAQI
31st Jul 2026254 AMAQI
26°C22/31°C
31st Jul 2026295 AMAQI
31st Jul 2026296 AMAQI
31st Jul 2026297 AMAQI
31st Jul 2026238 AMAQI
31st Jul 2026339 AMAQI
31st Jul 20264410 AMAQI
31st Jul 20263611 AMAQI
31st Jul 20265312 PMAQI
31st Jul 2026511 PMAQI
31st Jul 2026482 PMAQI
31st Jul 2026443 PMAQI
31st Jul 2026334 PMAQI
31st Jul 2026445 PMAQI
31st Jul 2026446 PMAQI
31st Jul 2026467 PMAQI
31st Jul 2026428 PMAQI
31st Jul 2026449 PMAQI
31st Jul 20265110 PMAQI
31st Jul 20265211 PMAQI
1st Aug 20265212 AMAQI
1st Aug 2026531 AMAQI
1st Aug 2026582 AMAQI
1st Aug 2026623 AMAQI
1st Aug 2026674 AMAQI
26°C21/32°C
1st Aug 2026705 AMAQI
1st Aug 2026726 AMAQI
1st Aug 2026537 AMAQI
1st Aug 2026698 AMAQI
1st Aug 2026699 AMAQI
1st Aug 20266210 AMAQI
1st Aug 20266611 AMAQI
1st Aug 20266412 PMAQI
1st Aug 2026521 PMAQI
1st Aug 2026482 PMAQI
1st Aug 2026563 PMAQI
1st Aug 2026564 PMAQI
1st Aug 2026555 PMAQI
1st Aug 2026666 PMAQI
1st Aug 2026567 PMAQI
1st Aug 2026568 PMAQI
1st Aug 2026579 PMAQI
1st Aug 20265610 PMAQI
1st Aug 20265311 PMAQI
2nd Aug 20265012 AMAQI
2nd Aug 2026421 AMAQI
2nd Aug 2026252 AMAQI
2nd Aug 2026423 AMAQI
2nd Aug 2026484 AMAQI
28°C24/32°C
2nd Aug 2026525 AMAQI
2nd Aug 2026546 AMAQI
2nd Aug 2026527 AMAQI
2nd Aug 2026538 AMAQI
2nd Aug 2026319 AMAQI
2nd Aug 20263610 AMAQI
2nd Aug 20263811 AMAQI
2nd Aug 20264212 PMAQI
2nd Aug 2026511 PMAQI
2nd Aug 2026422 PMAQI
2nd Aug 2026573 PMAQI
2nd Aug 2026564 PMAQI
2nd Aug 2026425 PMAQI
2nd Aug 2026446 PMAQI
2nd Aug 2026407 PMAQI
2nd Aug 2026348 PMAQI
2nd Aug 2026259 PMAQI
2nd Aug 20262510 PMAQI
2nd Aug 20262511 PMAQI
3rd Aug 20262512 AMAQI
3rd Aug 2026251 AMAQI
3rd Aug 2026342 AMAQI
3rd Aug 2026423 AMAQI
3rd Aug 2026514 AMAQI
27°C23/33°C
3rd Aug 2026515 AMAQI
3rd Aug 2026446 AMAQI
3rd Aug 2026427 AMAQI
3rd Aug 2026468 AMAQI
3rd Aug 2026449 AMAQI
3rd Aug 20264610 AMAQI
3rd Aug 20265011 AMAQI
3rd Aug 20265712 PMAQI
3rd Aug 2026631 PMAQI
3rd Aug 2026602 PMAQI
3rd Aug 2026593 PMAQI
3rd Aug 2026534 PMAQI
3rd Aug 2026555 PMAQI
3rd Aug 2026536 PMAQI
3rd Aug 2026567 PMAQI
3rd Aug 2026588 PMAQI
3rd Aug 2026649 PMAQI
3rd Aug 20267310 PMAQI
3rd Aug 20267011 PMAQI
4th Aug 20267012 AMAQI
4th Aug 2026681 AMAQI
4th Aug 2026642 AMAQI
4th Aug 2026663 AMAQI
4th Aug 2026744 AMAQI
28°C22/35°C
4th Aug 2026715 AMAQI
4th Aug 2026706 AMAQI
4th Aug 2026867 AMAQI
4th Aug 2026838 AMAQI
4th Aug 2026699 AMAQI
4th Aug 20266510 AMAQI
4th Aug 20266011 AMAQI
4th Aug 20265412 PMAQI
4th Aug 2026381 PMAQI
4th Aug 2026642 PMAQI
4th Aug 2026603 PMAQI
4th Aug 2026584 PMAQI
4th Aug 2026625 PMAQI
4th Aug 2026566 PMAQI
4th Aug 2026587 PMAQI
4th Aug 2026828 PMAQI
4th Aug 2026829 PMAQI
4th Aug 20266810 PMAQI
4th Aug 20264311 PMAQI
5th Aug 20262412 AMAQI
5th Aug 2026121 AMAQI
5th Aug 2026102 AMAQI
5th Aug 2026203 AMAQI
5th Aug 2026294 AMAQI
29°C24/35°C
5th Aug 2026275 AMAQI
5th Aug 2026296 AMAQI
5th Aug 2026427 AMAQI
5th Aug 2026278 AMAQI
5th Aug 2026189 AMAQI
5th Aug 20261210 AMAQI
5th Aug 20262111 AMAQI
5th Aug 20262312 PMAQI
5th Aug 2026251 PMAQI
5th Aug 2026192 PMAQI
5th Aug 2026173 PMAQI
5th Aug 2026124 PMAQI
5th Aug 2026275 PMAQI
5th Aug 2026536 PMAQI
5th Aug 2026337 PMAQI
5th Aug 2026388 PMAQI
5th Aug 2026259 PMAQI
5th Aug 20261910 PMAQI
5th Aug 20263311 PMAQI
6th Aug 20265312 AMAQI
6th Aug 2026601 AMAQI
6th Aug 2026812 AMAQI
6th Aug 2026803 AMAQI
6th Aug 2026904 AMAQI
29°C24/35°C
6th Aug 2026605 AMAQI
6th Aug 2026426 AMAQI
6th Aug 2026487 AMAQI
6th Aug 2026178 AMAQI
6th Aug 202689 AMAQI
6th Aug 2026810 AMAQI
6th Aug 20261211 AMAQI
6th Aug 20261412 PMAQI
6th Aug 2026141 PMAQI
6th Aug 2026312 PMAQI
6th Aug 2026273 PMAQI
6th Aug 2026334 PMAQI
6th Aug 2026345 PMAQI
6th Aug 2026296 PMAQI
6th Aug 2026277 PMAQI
6th Aug 2026258 PMAQI
6th Aug 2026219 PMAQI
6th Aug 20261610 PMAQI
6th Aug 20261211 PMAQI
7th Aug 20261712 AMAQI
7th Aug 2026381 AMAQI
7th Aug 2026452 AMAQI
7th Aug 2026523 AMAQI
7th Aug 2026764 AMAQI
29°C23/35°C
7th Aug 2026625 AMAQI
7th Aug 2026426 AMAQI
7th Aug 2026297 AMAQI
7th Aug 2026188 AMAQI
7th Aug 202689 AMAQI
7th Aug 2026810 AMAQI
7th Aug 2026811 AMAQI
7th Aug 2026812 PMAQI
7th Aug 2026461 PMAQI
7th Aug 2026122 PMAQI
7th Aug 2026233 PMAQI
7th Aug 2026274 PMAQI
7th Aug 2026255 PMAQI
7th Aug 2026406 PMAQI
7th Aug 2026337 PMAQI
7th Aug 2026338 PMAQI
7th Aug 2026219 PMAQI
7th Aug 20262710 PMAQI
7th Aug 20265011 PMAQI
8th Aug 20267812 AMAQI
8th Aug 2026851 AMAQI
8th Aug 2026782 AMAQI
8th Aug 2026783 AMAQI
8th Aug 2026734 AMAQI
29°C23/36°C
8th Aug 2026605 AMAQI
8th Aug 2026176 AMAQI
8th Aug 2026177 AMAQI
8th Aug 2026258 AMAQI
8th Aug 2026369 AMAQI
8th Aug 20262710 AMAQI
8th Aug 20261011 AMAQI
8th Aug 2026812 PMAQI
8th Aug 2026101 PMAQI
8th Aug 202682 PMAQI
8th Aug 2026173 PMAQI
8th Aug 2026124 PMAQI
8th Aug 2026125 PMAQI
8th Aug 2026176 PMAQI
8th Aug 2026177 PMAQI
8th Aug 2026178 PMAQI
8th Aug 2026179 PMAQI
8th Aug 20261810 PMAQI
8th Aug 20261411 PMAQI
9th Aug 2026512 AMAQI
9th Aug 202681 AMAQI
9th Aug 202682 AMAQI
9th Aug 2026163 AMAQI
9th Aug 2026124 AMAQI
28°C22/35°C
9th Aug 202685 AMAQI
9th Aug 202666 AMAQI
9th Aug 202687 AMAQI
9th Aug 2026128 AMAQI
9th Aug 2026239 AMAQI
9th Aug 20261210 AMAQI
9th Aug 20261211 AMAQI
9th Aug 20261012 PMAQI
9th Aug 202681 PMAQI
9th Aug 202682 PMAQI
9th Aug 2026123 PMAQI
9th Aug 2026144 PMAQI
9th Aug 202685 PMAQI
9th Aug 202686 PMAQI
9th Aug 2026107 PMAQI
9th Aug 2026128 PMAQI
9th Aug 2026129 PMAQI
9th Aug 20261210 PMAQI
9th Aug 20261011 PMAQI
10th Aug 20261212 AMAQI
10th Aug 2026141 AMAQI
10th Aug 2026122 AMAQI
10th Aug 2026253 AMAQI
10th Aug 2026214 AMAQI
25°C21/30°C
10th Aug 2026235 AMAQI
10th Aug 2026216 AMAQI
10th Aug 2026197 AMAQI
10th Aug 2026218 AMAQI
10th Aug 2026259 AMAQI
10th Aug 20262510 AMAQI
10th Aug 20262511 AMAQI
10th Aug 20262512 PMAQI
10th Aug 2026271 PMAQI
10th Aug 2026312 PMAQI
10th Aug 2026253 PMAQI
10th Aug 2026254 PMAQI
10th Aug 2026255 PMAQI
10th Aug 2026296 PMAQI
10th Aug 2026277 PMAQI
10th Aug 2026328 PMAQI
10th Aug 2026389 PMAQI
10th Aug 20262510 PMAQI
10th Aug 20262911 PMAQI
11th Aug 20262512 AMAQI
11th Aug 2026251 AMAQI
11th Aug 2026252 AMAQI
11th Aug 2026253 AMAQI
11th Aug 2026294 AMAQI
25°C21/30°C
11th Aug 2026315 AMAQI
11th Aug 2026336 AMAQI
11th Aug 2026317 AMAQI
11th Aug 2026258 AMAQI
11th Aug 2026259 AMAQI
11th Aug 20262710 AMAQI
11th Aug 20262711 AMAQI
11th Aug 20262512 PMAQI
11th Aug 2026271 PMAQI
11th Aug 2026252 PMAQI
11th Aug 2026423 PMAQI
11th Aug 2026494 PMAQI
11th Aug 2026465 PMAQI
11th Aug 2026466 PMAQI
11th Aug 2026407 PMAQI
11th Aug 2026308 PMAQI
11th Aug 2026219 PMAQI
11th Aug 20262310 PMAQI
11th Aug 20262111 PMAQI
12th Aug 20262112 AMAQI
12th Aug 2026211 AMAQI
12th Aug 2026212 AMAQI
12th Aug 2026213 AMAQI
12th Aug 2026214 AMAQI
24°C19/31°C
12th Aug 2026215 AMAQI
12th Aug 2026256 AMAQI
12th Aug 2026237 AMAQI
12th Aug 2026258 AMAQI
12th Aug 2026369 AMAQI
12th Aug 20263310 AMAQI
12th Aug 20263611 AMAQI
12th Aug 20262712 PMAQI
12th Aug 2026231 PMAQI
12th Aug 2026422 PMAQI
12th Aug 2026403 PMAQI
12th Aug 2026334 PMAQI
12th Aug 2026335 PMAQI
12th Aug 2026336 PMAQI
12th Aug 2026277 PMAQI
12th Aug 2026278 PMAQI
12th Aug 2026219 PMAQI
12th Aug 20262510 PMAQI
12th Aug 20262711 PMAQI
13th Aug 20262712 AMAQI
13th Aug 2026251 AMAQI
13th Aug 2026252 AMAQI
13th Aug 2026233 AMAQI
13th Aug 2026214 AMAQI
22°C15/30°C
13th Aug 2026255 AMAQI
13th Aug 2026316 AMAQI
13th Aug 2026337 AMAQI
13th Aug 2026428 AMAQI
13th Aug 2026389 AMAQI
13th Aug 20265210 AMAQI
13th Aug 20264211 AMAQI
13th Aug 20264612 PMAQI
13th Aug 2026501 PMAQI
13th Aug 2026292 PMAQI
13th Aug 2026293 PMAQI
13th Aug 2026274 PMAQI
13th Aug 2026235 PMAQI
13th Aug 2026256 PMAQI
13th Aug 2026277 PMAQI
13th Aug 2026218 PMAQI
13th Aug 2026329 PMAQI
13th Aug 20262110 PMAQI
13th Aug 20262311 PMAQI
14th Aug 20263412 AMAQI
14th Aug 2026541 AMAQI
14th Aug 2026522 AMAQI
14th Aug 2026463 AMAQI
14th Aug 2026334 AMAQI
24°C18/30°C
14th Aug 2026305 AMAQI
14th Aug 2026296 AMAQI
14th Aug 2026277 AMAQI
14th Aug 2026368 AMAQI
14th Aug 2026259 AMAQI
14th Aug 20264610 AMAQI
14th Aug 20265311 AMAQI
14th Aug 20265212 PMAQI
14th Aug 2026531 PMAQI
14th Aug 2026342 PMAQI
14th Aug 2026173 PMAQI
14th Aug 2026144 PMAQI
14th Aug 2026155 PMAQI
14th Aug 2026146 PMAQI
14th Aug 2026237 PMAQI
14th Aug 2026368 PMAQI
14th Aug 2026539 PMAQI
14th Aug 20264010 PMAQI
14th Aug 20262611 PMAQI
15th Aug 20263112 AMAQI
15th Aug 2026381 AMAQI
15th Aug 2026712 AMAQI
15th Aug 2026703 AMAQI
15th Aug 2026744 AMAQI
24°C20/30°C
15th Aug 2026665 AMAQI
5 AM15th Aug 2026766 AMAQI
15th Aug 2026697 AMAQI
15th Aug 2026658 AMAQI
15th Aug 2026659 AMAQI
15th Aug 20266010 AMAQI
15th Aug 20265611 AMAQI
15th Aug 20262012 PMAQI
12 PM15th Aug 2026291 PMAQI
15th Aug 2026442 PMAQI
15th Aug 2026703 PMAQI
15th Aug 2026704 PMAQI
15th Aug 2026255 PMAQI
15th Aug 2026366 PMAQI
15th Aug 2026547 PMAQI
7 PM15th Aug 2026368 PMAQI
15th Aug 2026209 PMAQI
15th Aug 20261810 PMAQI
15th Aug 20261911 PMAQI
12 AM
4 AM
24°C22/29°C
Day time
Avg. Highest Time
5 AM
40AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
9 AM - 7 PM
36AQI
11 hours / Day
330 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 5 AM (Avg. 40), while the lowest AQI was between 9 AM to 7 PM (Avg. 36).
Night time
Avg. Highest Time
4 AM
42AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
10 PM - 11 PM
32AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 4 AM to 4 AM (Avg. 42), while the lowest AQI was between 10 PM to 11 PM (Avg. 32).
2026 Days Vs Air Quality
Cheonan, Chonan, Chungnam, South Korea
2026
48%
106
42%
93
11%
24
Total number of days with different AQI categories in last 227 days in 2026 (138 days remaining)
Good
106 DaysModerate
93 DaysPoor
24 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 48%
Health Risk Level:
Significant
In 2026, 48% of 227 days were within WHO’s safe air quality limits, and 52% exceeded them. The risk of health issues is Significant, especially for those with existing respiratory or heart conditions.
Annual Air Quality Insights
Cheonan, Chonan, 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
30AQI (US)
30AQI (US)
2nd January 2026
39AQI (US)
39AQI (US)
3rd January 2026
52AQI (US)
52AQI (US)
4th January 2026
74AQI (US)
74AQI (US)
5th January 2026
61AQI (US)
61AQI (US)
6th January 2026
51AQI (US)
51AQI (US)
7th January 2026
53AQI (US)
53AQI (US)
8th January 2026
23AQI (US)
23AQI (US)
9th January 2026
43AQI (US)
43AQI (US)
10th January 2026
56AQI (US)
56AQI (US)
11th January 2026
26AQI (US)
26AQI (US)
12th January 2026
42AQI (US)
42AQI (US)
13th January 2026
48AQI (US)
48AQI (US)
14th January 2026
31AQI (US)
31AQI (US)
15th January 2026
98AQI (US)
98AQI (US)
16th January 2026
139AQI (US)
139AQI (US)
17th January 2026
119AQI (US)
119AQI (US)
18th January 2026
113AQI (US)
113AQI (US)
19th January 2026
60AQI (US)
60AQI (US)
20th January 2026
35AQI (US)
35AQI (US)
21st January 2026
39AQI (US)
39AQI (US)
22nd January 2026
36AQI (US)
36AQI (US)
23rd January 2026
63AQI (US)
63AQI (US)
24th January 2026
48AQI (US)
48AQI (US)
25th January 2026
28AQI (US)
28AQI (US)
26th January 2026
51AQI (US)
51AQI (US)
27th January 2026
61AQI (US)
61AQI (US)
28th January 2026
39AQI (US)
39AQI (US)
29th January 2026
44AQI (US)
44AQI (US)
30th January 2026
53AQI (US)
53AQI (US)
31st January 2026
68AQI (US)
68AQI (US)
1st February 2026
76AQI (US)
76AQI (US)
2nd February 2026
66AQI (US)
66AQI (US)
3rd February 2026
58AQI (US)
58AQI (US)
4th February 2026
98AQI (US)
98AQI (US)
5th February 2026
129AQI (US)
129AQI (US)
6th February 2026
68AQI (US)
68AQI (US)
7th February 2026
44AQI (US)
44AQI (US)
8th February 2026
44AQI (US)
44AQI (US)
9th February 2026
57AQI (US)
57AQI (US)
10th February 2026
82AQI (US)
82AQI (US)
11th February 2026
107AQI (US)
107AQI (US)
12th February 2026
112AQI (US)
112AQI (US)
13th February 2026
125AQI (US)
125AQI (US)
14th February 2026
137AQI (US)
137AQI (US)
15th February 2026
106AQI (US)
106AQI (US)
16th February 2026
46AQI (US)
46AQI (US)
17th February 2026
50AQI (US)
50AQI (US)
18th February 2026
59AQI (US)
59AQI (US)
19th February 2026
32AQI (US)
32AQI (US)
20th February 2026
76AQI (US)
76AQI (US)
21st February 2026
89AQI (US)
89AQI (US)
22nd February 2026
56AQI (US)
56AQI (US)
23rd February 2026
28AQI (US)
28AQI (US)
24th February 2026
50AQI (US)
50AQI (US)
25th February 2026
53AQI (US)
53AQI (US)
26th February 2026
22AQI (US)
22AQI (US)
27th February 2026
30AQI (US)
30AQI (US)
28th February 2026
49AQI (US)
49AQI (US)
1st March 2026
28AQI (US)
28AQI (US)
2nd March 2026
19AQI (US)
19AQI (US)
3rd March 2026
48AQI (US)
48AQI (US)
4th March 2026
66AQI (US)
66AQI (US)
5th March 2026
86AQI (US)
86AQI (US)
6th March 2026
72AQI (US)
72AQI (US)
7th March 2026
56AQI (US)
56AQI (US)
8th March 2026
60AQI (US)
60AQI (US)
9th March 2026
100AQI (US)
100AQI (US)
10th March 2026
100AQI (US)
100AQI (US)
11th March 2026
105AQI (US)
105AQI (US)
12th March 2026
122AQI (US)
122AQI (US)
13th March 2026
49AQI (US)
49AQI (US)
14th March 2026
54AQI (US)
54AQI (US)
15th March 2026
97AQI (US)
97AQI (US)
16th March 2026
131AQI (US)
131AQI (US)
17th March 2026
136AQI (US)
136AQI (US)
18th March 2026
129AQI (US)
129AQI (US)
19th March 2026
60AQI (US)
60AQI (US)
20th March 2026
70AQI (US)
70AQI (US)
21st March 2026
103AQI (US)
103AQI (US)
22nd March 2026
92AQI (US)
92AQI (US)
23rd March 2026
124AQI (US)
124AQI (US)
24th March 2026
119AQI (US)
119AQI (US)
25th March 2026
106AQI (US)
106AQI (US)
26th March 2026
119AQI (US)
119AQI (US)
27th March 2026
131AQI (US)
131AQI (US)
28th March 2026
117AQI (US)
117AQI (US)
29th March 2026
117AQI (US)
117AQI (US)
30th March 2026
108AQI (US)
108AQI (US)
31st March 2026
50AQI (US)
50AQI (US)
1st April 2026
92AQI (US)
92AQI (US)
2nd April 2026
94AQI (US)
94AQI (US)
3rd April 2026
123AQI (US)
123AQI (US)
4th April 2026
50AQI (US)
50AQI (US)
5th April 2026
66AQI (US)
66AQI (US)
6th April 2026
63AQI (US)
63AQI (US)
7th April 2026
26AQI (US)
26AQI (US)
8th April 2026
51AQI (US)
51AQI (US)
9th April 2026
64AQI (US)
64AQI (US)
10th April 2026
38AQI (US)
38AQI (US)
11th April 2026
79AQI (US)
79AQI (US)
12th April 2026
82AQI (US)
82AQI (US)
13th April 2026
76AQI (US)
76AQI (US)
14th April 2026
65AQI (US)
65AQI (US)
15th April 2026
81AQI (US)
81AQI (US)
16th April 2026
63AQI (US)
63AQI (US)
17th April 2026
18th April 2026
60AQI (US)
60AQI (US)
19th April 2026
84AQI (US)
84AQI (US)
20th April 2026
84AQI (US)
84AQI (US)
21st April 2026
67AQI (US)
67AQI (US)
22nd April 2026
23rd April 2026
55AQI (US)
55AQI (US)
24th April 2026
34AQI (US)
34AQI (US)
25th April 2026
55AQI (US)
55AQI (US)
26th April 2026
61AQI (US)
61AQI (US)
27th April 2026
55AQI (US)
55AQI (US)
28th April 2026
40AQI (US)
40AQI (US)
29th April 2026
53AQI (US)
53AQI (US)
30th April 2026
55AQI (US)
55AQI (US)
1st May 2026
48AQI (US)
48AQI (US)
2nd May 2026
100AQI (US)
100AQI (US)
3rd May 2026
63AQI (US)
63AQI (US)
4th May 2026
32AQI (US)
32AQI (US)
5th May 2026
35AQI (US)
35AQI (US)
6th May 2026
40AQI (US)
40AQI (US)
7th May 2026
43AQI (US)
43AQI (US)
8th May 2026
45AQI (US)
45AQI (US)
9th May 2026
10th May 2026
35AQI (US)
35AQI (US)
11th May 2026
40AQI (US)
40AQI (US)
12th May 2026
34AQI (US)
34AQI (US)
13th May 2026
55AQI (US)
55AQI (US)
14th May 2026
48AQI (US)
48AQI (US)
15th May 2026
57AQI (US)
57AQI (US)
16th May 2026
78AQI (US)
78AQI (US)
17th May 2026
65AQI (US)
65AQI (US)
18th May 2026
56AQI (US)
56AQI (US)
19th May 2026
53AQI (US)
53AQI (US)
20th May 2026
63AQI (US)
63AQI (US)
21st May 2026
67AQI (US)
67AQI (US)
22nd May 2026
77AQI (US)
77AQI (US)
23rd May 2026
71AQI (US)
71AQI (US)
24th May 2026
70AQI (US)
70AQI (US)
25th May 2026
64AQI (US)
64AQI (US)
26th May 2026
49AQI (US)
49AQI (US)
27th May 2026
30AQI (US)
30AQI (US)
28th May 2026
33AQI (US)
33AQI (US)
29th May 2026
60AQI (US)
60AQI (US)
30th May 2026
47AQI (US)
47AQI (US)
31st May 2026
50AQI (US)
50AQI (US)
1st June 2026
45AQI (US)
45AQI (US)
2nd June 2026
55AQI (US)
55AQI (US)
3rd June 2026
72AQI (US)
72AQI (US)
4th June 2026
65AQI (US)
65AQI (US)
5th June 2026
26AQI (US)
26AQI (US)
6th June 2026
37AQI (US)
37AQI (US)
7th June 2026
34AQI (US)
34AQI (US)
8th June 2026
51AQI (US)
51AQI (US)
9th June 2026
40AQI (US)
40AQI (US)
10th June 2026
47AQI (US)
47AQI (US)
11th June 2026
39AQI (US)
39AQI (US)
12th June 2026
44AQI (US)
44AQI (US)
13th June 2026
47AQI (US)
47AQI (US)
14th June 2026
48AQI (US)
48AQI (US)
15th June 2026
45AQI (US)
45AQI (US)
16th June 2026
54AQI (US)
54AQI (US)
17th June 2026
60AQI (US)
60AQI (US)
18th June 2026
64AQI (US)
64AQI (US)
19th June 2026
53AQI (US)
53AQI (US)
20th June 2026
29AQI (US)
29AQI (US)
21st June 2026
24AQI (US)
24AQI (US)
22nd June 2026
35AQI (US)
35AQI (US)
23rd June 2026
26AQI (US)
26AQI (US)
24th June 2026
14AQI (US)
14AQI (US)
25th June 2026
26AQI (US)
26AQI (US)
26th June 2026
35AQI (US)
35AQI (US)
27th June 2026
62AQI (US)
62AQI (US)
28th June 2026
57AQI (US)
57AQI (US)
29th June 2026
54AQI (US)
54AQI (US)
30th June 2026
61AQI (US)
61AQI (US)
1st July 2026
52AQI (US)
52AQI (US)
2nd July 2026
35AQI (US)
35AQI (US)
3rd July 2026
27AQI (US)
27AQI (US)
4th July 2026
51AQI (US)
51AQI (US)
5th July 2026
39AQI (US)
39AQI (US)
6th July 2026
32AQI (US)
32AQI (US)
7th July 2026
31AQI (US)
31AQI (US)
8th July 2026
22AQI (US)
22AQI (US)
9th July 2026
19AQI (US)
19AQI (US)
10th July 2026
36AQI (US)
36AQI (US)
11th July 2026
35AQI (US)
35AQI (US)
12th July 2026
42AQI (US)
42AQI (US)
13th July 2026
27AQI (US)
27AQI (US)
14th July 2026
23AQI (US)
23AQI (US)
15th July 2026
32AQI (US)
32AQI (US)
16th July 2026
58AQI (US)
58AQI (US)
17th July 2026
61AQI (US)
61AQI (US)
18th July 2026
37AQI (US)
37AQI (US)
19th July 2026
32AQI (US)
32AQI (US)
20th July 2026
40AQI (US)
40AQI (US)
21st July 2026
33AQI (US)
33AQI (US)
22nd July 2026
39AQI (US)
39AQI (US)
23rd July 2026
45AQI (US)
45AQI (US)
24th July 2026
33AQI (US)
33AQI (US)
25th July 2026
25AQI (US)
25AQI (US)
26th July 2026
26AQI (US)
26AQI (US)
27th July 2026
30AQI (US)
30AQI (US)
28th July 2026
43AQI (US)
43AQI (US)
29th July 2026
25AQI (US)
25AQI (US)
30th July 2026
27AQI (US)
27AQI (US)
31st July 2026
38AQI (US)
38AQI (US)
1st August 2026
60AQI (US)
60AQI (US)
2nd August 2026
42AQI (US)
42AQI (US)
3rd August 2026
51AQI (US)
51AQI (US)
4th August 2026
65AQI (US)
65AQI (US)
5th August 2026
25AQI (US)
25AQI (US)
6th August 2026
35AQI (US)
35AQI (US)
7th August 2026
31AQI (US)
31AQI (US)
8th August 2026
31AQI (US)
31AQI (US)
9th August 2026
11AQI (US)
11AQI (US)
10th August 2026
24AQI (US)
24AQI (US)
11th August 2026
30AQI (US)
30AQI (US)
12th August 2026
28AQI (US)
28AQI (US)
13th August 2026
31AQI (US)
31AQI (US)
14th August 2026
35AQI (US)
35AQI (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
56AQI (US)
70AQI (US)
89AQI (US)
65AQI (US)
54AQI (US)
45AQI (US)
35AQI (US)
36AQI (US)
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202657AQI (US)
15
13
3
10
12
6
5
12
14
5
22
1
15
15
18
12
27
4
11
3
106
93
24
Highest AQI (US) recorded in
March89AQI (US)
Lowest AQI (US) recorded in
July35AQI (US)
202560AQI (US)
1
25
5
4
23
1
4
23
4
7
23
13
18
5
25
15
16
19
12
27
3
13
18
7
20
3
8
21
2
123
227
15
Highest AQI (US) recorded in
January79AQI (US)
Lowest AQI (US) recorded in
September41AQI (US)
202460AQI (US)
10
13
7
9
14
5
1
7
19
5
4
23
3
8
22
1
3
27
26
5
11
20
24
6
17
14
9
18
3
7
24
135
205
24
1
Highest AQI (US) recorded in
January77AQI (US)
Lowest AQI (US) recorded in
July37AQI (US)
202368AQI (US)
6
17
4
3
17
6
4
1
21
9
2
22
5
1
5
21
5
2
28
17
14
19
12
19
11
12
19
16
12
1
10
15
5
1
109
209
35
8
1
Highest AQI (US) recorded in
February99AQI (US)
Lowest AQI (US) recorded in
September43AQI (US)
202274AQI (US)
18
8
3
1
11
6
3
5
15
11
2
12
3
5
25
1
17
13
7
17
1
14
12
2
11
14
6
3
16
9
2
5
22
4
71
175
50
8
Highest AQI (US) recorded in
January95AQI (US)
Lowest AQI (US) recorded in
August22AQI (US)
202174AQI (US)
5
18
7
2
16
7
3
3
14
10
2
2
4
23
3
7
20
2
1
1
3
26
1
15
16
15
16
23
7
6
20
5
5
17
6
2
5
15
11
93
208
52
7
3
1
Highest AQI (US) recorded in
March107AQI (US)
Lowest AQI (US) recorded in
September44AQI (US)
202062AQI (US)
3
10
6
15
12
6
3
27
20
11
17
14
19
11
7
19
5
4
17
8
1
2
18
10
1
93
148
23
2
Highest AQI (US) recorded in
December86AQI (US)
Lowest AQI (US) recorded in
July41AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Most Polluted Year Recorded
2022(Avg.)
74AQI (US)Least Polluted Year Recorded
2026(Avg.)
57AQI (US)Cheonan's annual 2026 AQI (US) (57) shows an average percentage change of -13.3% (improved AQI (US)) compared to previous years: 2020 (62), 2021 (74), 2022 (74), 2023 (68), 2024 (60), 2025 (60).
