Ansan, 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
Ansan, Gyeonggi, South Korea
2022
2023
2024
2025
2026
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
24th Aug 2024
84AQILowest AQI recorded on
9th Aug 2023
22AQISame Day Analysis (8th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 35 of Good air quality, showing improvement over 2025 and 2024 on the same day.
Day & Night AQI Trend: 8th Aug - 9th Aug 2026
Ansan, Gyeonggi, South Korea
AQI
Day
Night
.
5 AM8th Aug 2026
7 PM
4 AM9th Aug 2026
Day time
Avg. Highest Time
5AM8th Aug
63AQI
Avg. Lowest Time
5PM8th Aug
15AQI
Night time
Avg. Highest Time
8PM8th Aug
23AQI
Avg. Lowest Time
1AM9th Aug
15AQI
In the last 24 hours,
Ansan's AQI reached its highest point of 63 at 5 AM during the Day, while the lowest point, 15, was recorded at 1 AM during the Night between 8th Aug and 9th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Ansan, 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 2026325 AMAQI
11th Jul 2026326 AMAQI
11th Jul 2026327 AMAQI
11th Jul 2026348 AMAQI
11th Jul 2026349 AMAQI
11th Jul 20263410 AMAQI
11th Jul 20262911 AMAQI
11th Jul 20262812 PMAQI
11th Jul 2026261 PMAQI
11th Jul 2026252 PMAQI
11th Jul 2026243 PMAQI
11th Jul 2026274 PMAQI
11th Jul 2026315 PMAQI
11th Jul 2026306 PMAQI
11th Jul 2026307 PMAQI
11th Jul 2026328 PMAQI
11th Jul 2026339 PMAQI
11th Jul 20263310 PMAQI
11th Jul 20263311 PMAQI
12th Jul 20263112 AMAQI
12th Jul 2026321 AMAQI
12th Jul 2026322 AMAQI
12th Jul 2026313 AMAQI
12th Jul 2026294 AMAQI
26°C23/28°C
12th Jul 2026315 AMAQI
12th Jul 2026316 AMAQI
12th Jul 2026317 AMAQI
12th Jul 2026318 AMAQI
12th Jul 2026369 AMAQI
12th Jul 20263610 AMAQI
12th Jul 20263011 AMAQI
12th Jul 20263012 PMAQI
12th Jul 2026271 PMAQI
12th Jul 2026292 PMAQI
12th Jul 2026263 PMAQI
12th Jul 2026264 PMAQI
12th Jul 2026405 PMAQI
12th Jul 2026416 PMAQI
12th Jul 2026417 PMAQI
12th Jul 2026408 PMAQI
12th Jul 2026389 PMAQI
12th Jul 20264110 PMAQI
12th Jul 20264011 PMAQI
13th Jul 20264312 AMAQI
13th Jul 2026371 AMAQI
13th Jul 2026392 AMAQI
13th Jul 2026373 AMAQI
13th Jul 2026354 AMAQI
28°C26/31°C
13th Jul 2026345 AMAQI
13th Jul 2026366 AMAQI
13th Jul 2026307 AMAQI
13th Jul 2026348 AMAQI
13th Jul 2026319 AMAQI
13th Jul 20263310 AMAQI
13th Jul 20263011 AMAQI
13th Jul 20263112 PMAQI
13th Jul 2026341 PMAQI
13th Jul 2026342 PMAQI
13th Jul 2026383 PMAQI
13th Jul 2026384 PMAQI
13th Jul 2026355 PMAQI
13th Jul 2026366 PMAQI
13th Jul 2026347 PMAQI
13th Jul 2026398 PMAQI
13th Jul 2026409 PMAQI
13th Jul 20263310 PMAQI
13th Jul 20263411 PMAQI
14th Jul 20263312 AMAQI
14th Jul 2026371 AMAQI
14th Jul 2026402 AMAQI
14th Jul 2026353 AMAQI
14th Jul 2026324 AMAQI
27°C26/29°C
14th Jul 2026305 AMAQI
14th Jul 2026296 AMAQI
14th Jul 2026277 AMAQI
14th Jul 2026288 AMAQI
14th Jul 2026279 AMAQI
14th Jul 20262610 AMAQI
14th Jul 20262511 AMAQI
14th Jul 20262512 PMAQI
14th Jul 2026271 PMAQI
14th Jul 2026282 PMAQI
14th Jul 2026303 PMAQI
14th Jul 2026354 PMAQI
14th Jul 2026395 PMAQI
14th Jul 2026396 PMAQI
14th Jul 2026367 PMAQI
14th Jul 2026398 PMAQI
14th Jul 2026399 PMAQI
14th Jul 20264210 PMAQI
14th Jul 20263411 PMAQI
15th Jul 20261212 AMAQI
15th Jul 2026101 AMAQI
15th Jul 2026172 AMAQI
15th Jul 2026233 AMAQI
15th Jul 2026334 AMAQI
26°C24/29°C
15th Jul 2026435 AMAQI
15th Jul 2026346 AMAQI
15th Jul 2026357 AMAQI
15th Jul 2026308 AMAQI
15th Jul 2026369 AMAQI
15th Jul 20263310 AMAQI
15th Jul 20263111 AMAQI
15th Jul 20263412 PMAQI
15th Jul 2026441 PMAQI
15th Jul 2026442 PMAQI
15th Jul 2026413 PMAQI
15th Jul 2026464 PMAQI
15th Jul 2026535 PMAQI
15th Jul 2026556 PMAQI
15th Jul 2026547 PMAQI
15th Jul 2026518 PMAQI
15th Jul 2026529 PMAQI
15th Jul 20266410 PMAQI
15th Jul 20266411 PMAQI
16th Jul 20266312 AMAQI
16th Jul 2026611 AMAQI
16th Jul 2026582 AMAQI
16th Jul 2026573 AMAQI
16th Jul 2026604 AMAQI
24°C23/25°C
16th Jul 2026615 AMAQI
16th Jul 2026616 AMAQI
16th Jul 2026677 AMAQI
16th Jul 2026668 AMAQI
16th Jul 2026679 AMAQI
16th Jul 20266910 AMAQI
16th Jul 20267211 AMAQI
16th Jul 20267612 PMAQI
16th Jul 2026781 PMAQI
16th Jul 2026812 PMAQI
16th Jul 2026783 PMAQI
16th Jul 2026554 PMAQI
16th Jul 2026505 PMAQI
16th Jul 2026486 PMAQI
16th Jul 2026407 PMAQI
16th Jul 2026378 PMAQI
16th Jul 2026399 PMAQI
16th Jul 20264210 PMAQI
16th Jul 20264311 PMAQI
17th Jul 20264512 AMAQI
17th Jul 2026431 AMAQI
17th Jul 2026422 AMAQI
17th Jul 2026443 AMAQI
17th Jul 2026504 AMAQI
24°C23/26°C
17th Jul 2026515 AMAQI
17th Jul 2026506 AMAQI
17th Jul 2026527 AMAQI
17th Jul 2026558 AMAQI
17th Jul 2026589 AMAQI
17th Jul 20266510 AMAQI
17th Jul 20266711 AMAQI
17th Jul 20267012 PMAQI
17th Jul 2026761 PMAQI
17th Jul 2026772 PMAQI
17th Jul 2026823 PMAQI
17th Jul 2026884 PMAQI
17th Jul 2026895 PMAQI
17th Jul 2026956 PMAQI
17th Jul 2026967 PMAQI
17th Jul 2026918 PMAQI
17th Jul 2026889 PMAQI
17th Jul 20268810 PMAQI
17th Jul 20269111 PMAQI
18th Jul 202610012 AMAQI
18th Jul 20261051 AMAQI
18th Jul 20261062 AMAQI
18th Jul 2026893 AMAQI
18th Jul 2026754 AMAQI
24°C23/27°C
18th Jul 2026605 AMAQI
18th Jul 2026486 AMAQI
18th Jul 2026367 AMAQI
18th Jul 2026288 AMAQI
18th Jul 2026249 AMAQI
18th Jul 20262710 AMAQI
18th Jul 20263011 AMAQI
18th Jul 20262712 PMAQI
18th Jul 2026251 PMAQI
18th Jul 2026292 PMAQI
18th Jul 2026273 PMAQI
18th Jul 2026304 PMAQI
18th Jul 2026345 PMAQI
18th Jul 2026366 PMAQI
18th Jul 2026427 PMAQI
18th Jul 2026438 PMAQI
18th Jul 2026389 PMAQI
18th Jul 20263110 PMAQI
18th Jul 20262711 PMAQI
19th Jul 20262012 AMAQI
19th Jul 2026181 AMAQI
19th Jul 2026182 AMAQI
19th Jul 2026173 AMAQI
19th Jul 2026184 AMAQI
23°C22/24°C
19th Jul 2026245 AMAQI
19th Jul 2026316 AMAQI
19th Jul 2026447 AMAQI
19th Jul 2026498 AMAQI
19th Jul 2026529 AMAQI
19th Jul 20263610 AMAQI
19th Jul 20263511 AMAQI
19th Jul 20263412 PMAQI
19th Jul 2026361 PMAQI
19th Jul 2026412 PMAQI
19th Jul 2026453 PMAQI
19th Jul 2026454 PMAQI
19th Jul 2026415 PMAQI
19th Jul 2026346 PMAQI
19th Jul 2026307 PMAQI
19th Jul 2026298 PMAQI
19th Jul 2026319 PMAQI
19th Jul 20263110 PMAQI
19th Jul 20262911 PMAQI
20th Jul 20263112 AMAQI
20th Jul 2026311 AMAQI
20th Jul 2026252 AMAQI
20th Jul 2026283 AMAQI
20th Jul 2026264 AMAQI
23°C23/24°C
20th Jul 2026295 AMAQI
20th Jul 2026356 AMAQI
20th Jul 2026367 AMAQI
20th Jul 2026378 AMAQI
20th Jul 2026389 AMAQI
20th Jul 20263910 AMAQI
20th Jul 20263911 AMAQI
20th Jul 20263712 PMAQI
20th Jul 2026321 PMAQI
20th Jul 2026282 PMAQI
20th Jul 2026243 PMAQI
20th Jul 2026224 PMAQI
20th Jul 2026235 PMAQI
20th Jul 2026226 PMAQI
20th Jul 2026227 PMAQI
20th Jul 2026278 PMAQI
20th Jul 2026279 PMAQI
20th Jul 20262310 PMAQI
20th Jul 20262411 PMAQI
21st Jul 20263312 AMAQI
21st Jul 2026391 AMAQI
21st Jul 2026472 AMAQI
21st Jul 2026423 AMAQI
21st Jul 2026404 AMAQI
24°C23/24°C
21st Jul 2026395 AMAQI
21st Jul 2026316 AMAQI
21st Jul 2026317 AMAQI
21st Jul 2026328 AMAQI
21st Jul 2026309 AMAQI
21st Jul 20262910 AMAQI
21st Jul 20263011 AMAQI
21st Jul 2026351 PMAQI
21st Jul 2026342 PMAQI
21st Jul 2026293 PMAQI
21st Jul 2026254 PMAQI
21st Jul 2026255 PMAQI
21st Jul 2026266 PMAQI
21st Jul 2026787 PMAQI
21st Jul 2026268 PMAQI
21st Jul 2026249 PMAQI
21st Jul 20262410 PMAQI
21st Jul 20263011 PMAQI
22nd Jul 20263412 AMAQI
22nd Jul 2026341 AMAQI
22nd Jul 2026302 AMAQI
22nd Jul 2026263 AMAQI
22nd Jul 2026254 AMAQI
24°C24/25°C
22nd Jul 2026265 AMAQI
22nd Jul 2026246 AMAQI
22nd Jul 2026317 AMAQI
22nd Jul 2026388 AMAQI
22nd Jul 2026399 AMAQI
22nd Jul 20264510 AMAQI
22nd Jul 20264611 AMAQI
22nd Jul 20265412 PMAQI
22nd Jul 2026341 PMAQI
22nd Jul 2026422 PMAQI
22nd Jul 2026493 PMAQI
22nd Jul 2026554 PMAQI
22nd Jul 2026475 PMAQI
22nd Jul 2026526 PMAQI
22nd Jul 2026547 PMAQI
22nd Jul 2026558 PMAQI
22nd Jul 2026549 PMAQI
22nd Jul 20264510 PMAQI
22nd Jul 20264911 PMAQI
23rd Jul 20264312 AMAQI
23rd Jul 2026451 AMAQI
23rd Jul 2026452 AMAQI
23rd Jul 2026533 AMAQI
23rd Jul 2026504 AMAQI
25°C23/26°C
23rd Jul 2026535 AMAQI
23rd Jul 2026546 AMAQI
23rd Jul 2026537 AMAQI
23rd Jul 2026518 AMAQI
23rd Jul 2026539 AMAQI
23rd Jul 20265010 AMAQI
23rd Jul 20265411 AMAQI
23rd Jul 20266112 PMAQI
23rd Jul 2026631 PMAQI
23rd Jul 2026572 PMAQI
23rd Jul 2026553 PMAQI
23rd Jul 2026564 PMAQI
23rd Jul 2026565 PMAQI
23rd Jul 2026586 PMAQI
23rd Jul 2026557 PMAQI
23rd Jul 2026568 PMAQI
23rd Jul 2026609 PMAQI
23rd Jul 20266310 PMAQI
23rd Jul 20266211 PMAQI
24th Jul 20265912 AMAQI
24th Jul 2026581 AMAQI
24th Jul 2026542 AMAQI
24th Jul 2026463 AMAQI
24th Jul 2026524 AMAQI
25°C24/26°C
24th Jul 2026505 AMAQI
24th Jul 2026476 AMAQI
24th Jul 2026487 AMAQI
24th Jul 2026518 AMAQI
24th Jul 2026509 AMAQI
24th Jul 20265310 AMAQI
24th Jul 20264911 AMAQI
24th Jul 20264612 PMAQI
24th Jul 2026421 PMAQI
24th Jul 2026412 PMAQI
24th Jul 2026453 PMAQI
24th Jul 2026434 PMAQI
24th Jul 2026445 PMAQI
24th Jul 2026426 PMAQI
24th Jul 2026477 PMAQI
24th Jul 2026508 PMAQI
24th Jul 2026519 PMAQI
24th Jul 20264010 PMAQI
24th Jul 20263511 PMAQI
25th Jul 20263012 AMAQI
25th Jul 2026271 AMAQI
25th Jul 2026262 AMAQI
25th Jul 2026283 AMAQI
25th Jul 2026284 AMAQI
26°C24/28°C
25th Jul 2026305 AMAQI
25th Jul 2026296 AMAQI
25th Jul 2026307 AMAQI
25th Jul 2026328 AMAQI
25th Jul 2026319 AMAQI
25th Jul 20262910 AMAQI
25th Jul 20263111 AMAQI
25th Jul 20263412 PMAQI
25th Jul 2026431 PMAQI
25th Jul 2026382 PMAQI
25th Jul 2026323 PMAQI
25th Jul 2026304 PMAQI
25th Jul 2026285 PMAQI
25th Jul 2026296 PMAQI
25th Jul 2026257 PMAQI
25th Jul 2026268 PMAQI
25th Jul 2026329 PMAQI
25th Jul 20262510 PMAQI
25th Jul 20262511 PMAQI
26th Jul 20262312 AMAQI
26th Jul 2026231 AMAQI
26th Jul 2026242 AMAQI
26th Jul 2026243 AMAQI
26th Jul 2026244 AMAQI
26°C25/28°C
26th Jul 2026255 AMAQI
26th Jul 2026236 AMAQI
26th Jul 2026257 AMAQI
26th Jul 2026288 AMAQI
26th Jul 2026289 AMAQI
26th Jul 20262710 AMAQI
26th Jul 20262511 AMAQI
26th Jul 20262212 PMAQI
26th Jul 2026251 PMAQI
26th Jul 2026232 PMAQI
26th Jul 2026263 PMAQI
26th Jul 2026264 PMAQI
26th Jul 2026295 PMAQI
26th Jul 2026476 PMAQI
26th Jul 2026477 PMAQI
26th Jul 2026408 PMAQI
26th Jul 2026309 PMAQI
26th Jul 20262610 PMAQI
26th Jul 20262811 PMAQI
27th Jul 20262812 AMAQI
27th Jul 2026271 AMAQI
27th Jul 2026272 AMAQI
27th Jul 2026263 AMAQI
27th Jul 2026264 AMAQI
26°C24/28°C
27th Jul 2026255 AMAQI
27th Jul 2026246 AMAQI
27th Jul 2026257 AMAQI
27th Jul 2026268 AMAQI
27th Jul 2026289 AMAQI
27th Jul 20262510 AMAQI
27th Jul 20262811 AMAQI
27th Jul 20263212 PMAQI
27th Jul 2026231 PMAQI
27th Jul 2026262 PMAQI
27th Jul 2026263 PMAQI
27th Jul 2026284 PMAQI
27th Jul 2026275 PMAQI
27th Jul 2026466 PMAQI
27th Jul 2026677 PMAQI
27th Jul 2026498 PMAQI
27th Jul 2026399 PMAQI
27th Jul 20262610 PMAQI
27th Jul 20262711 PMAQI
28th Jul 20262512 AMAQI
28th Jul 2026261 AMAQI
28th Jul 2026262 AMAQI
28th Jul 2026273 AMAQI
28th Jul 2026264 AMAQI
26°C25/28°C
28th Jul 2026255 AMAQI
28th Jul 2026276 AMAQI
28th Jul 2026287 AMAQI
28th Jul 2026288 AMAQI
28th Jul 2026359 AMAQI
28th Jul 20263810 AMAQI
28th Jul 20264111 AMAQI
28th Jul 20264812 PMAQI
28th Jul 2026521 PMAQI
28th Jul 2026532 PMAQI
28th Jul 2026553 PMAQI
28th Jul 2026584 PMAQI
28th Jul 2026675 PMAQI
28th Jul 2026606 PMAQI
28th Jul 2026627 PMAQI
28th Jul 2026628 PMAQI
28th Jul 2026609 PMAQI
28th Jul 20265310 PMAQI
28th Jul 20264111 PMAQI
29th Jul 20264012 AMAQI
29th Jul 2026361 AMAQI
29th Jul 2026312 AMAQI
29th Jul 2026313 AMAQI
29th Jul 2026294 AMAQI
26°C25/28°C
29th Jul 2026265 AMAQI
29th Jul 2026226 AMAQI
29th Jul 2026227 AMAQI
29th Jul 2026248 AMAQI
29th Jul 2026239 AMAQI
29th Jul 20262210 AMAQI
29th Jul 20262211 AMAQI
29th Jul 20262112 PMAQI
29th Jul 2026221 PMAQI
29th Jul 2026222 PMAQI
29th Jul 2026223 PMAQI
29th Jul 2026224 PMAQI
29th Jul 2026235 PMAQI
29th Jul 2026246 PMAQI
29th Jul 2026267 PMAQI
29th Jul 2026248 PMAQI
29th Jul 2026249 PMAQI
29th Jul 20262210 PMAQI
29th Jul 20262211 PMAQI
30th Jul 20262712 AMAQI
30th Jul 2026281 AMAQI
30th Jul 2026272 AMAQI
30th Jul 2026253 AMAQI
30th Jul 2026244 AMAQI
26°C25/27°C
30th Jul 2026295 AMAQI
30th Jul 2026316 AMAQI
30th Jul 2026317 AMAQI
30th Jul 2026318 AMAQI
30th Jul 2026289 AMAQI
30th Jul 20262510 AMAQI
30th Jul 20262111 AMAQI
30th Jul 20262212 PMAQI
30th Jul 2026251 PMAQI
30th Jul 2026212 PMAQI
30th Jul 2026223 PMAQI
30th Jul 2026224 PMAQI
30th Jul 2026255 PMAQI
30th Jul 2026226 PMAQI
30th Jul 2026227 PMAQI
30th Jul 2026258 PMAQI
30th Jul 2026279 PMAQI
30th Jul 20262710 PMAQI
30th Jul 20263011 PMAQI
31st Jul 20262812 AMAQI
31st Jul 2026281 AMAQI
31st Jul 2026252 AMAQI
31st Jul 2026313 AMAQI
31st Jul 2026434 AMAQI
26°C24/28°C
31st Jul 2026405 AMAQI
31st Jul 2026256 AMAQI
31st Jul 2026257 AMAQI
31st Jul 2026268 AMAQI
31st Jul 2026279 AMAQI
31st Jul 20262510 AMAQI
31st Jul 20262911 AMAQI
31st Jul 20263312 PMAQI
31st Jul 2026301 PMAQI
31st Jul 2026282 PMAQI
31st Jul 2026383 PMAQI
31st Jul 2026414 PMAQI
31st Jul 2026375 PMAQI
31st Jul 2026416 PMAQI
31st Jul 2026557 PMAQI
31st Jul 2026578 PMAQI
31st Jul 2026579 PMAQI
31st Jul 20265310 PMAQI
31st Jul 20265611 PMAQI
1st Aug 20266312 AMAQI
1st Aug 2026671 AMAQI
1st Aug 2026702 AMAQI
1st Aug 2026683 AMAQI
1st Aug 2026754 AMAQI
27°C25/28°C
1st Aug 2026815 AMAQI
1st Aug 2026886 AMAQI
1st Aug 2026877 AMAQI
1st Aug 2026898 AMAQI
1st Aug 2026899 AMAQI
1st Aug 20268610 AMAQI
1st Aug 20268211 AMAQI
1st Aug 20267512 PMAQI
1st Aug 2026681 PMAQI
1st Aug 2026622 PMAQI
1st Aug 2026623 PMAQI
1st Aug 2026624 PMAQI
1st Aug 2026655 PMAQI
1st Aug 2026726 PMAQI
1st Aug 2026737 PMAQI
1st Aug 2026738 PMAQI
1st Aug 2026739 PMAQI
1st Aug 20266610 PMAQI
1st Aug 20265811 PMAQI
2nd Aug 20265012 AMAQI
2nd Aug 2026461 AMAQI
2nd Aug 2026472 AMAQI
2nd Aug 2026443 AMAQI
2nd Aug 2026404 AMAQI
27°C26/28°C
2nd Aug 2026435 AMAQI
2nd Aug 2026476 AMAQI
2nd Aug 2026447 AMAQI
2nd Aug 2026468 AMAQI
2nd Aug 2026439 AMAQI
2nd Aug 20264410 AMAQI
2nd Aug 20264311 AMAQI
2nd Aug 20264412 PMAQI
2nd Aug 2026421 PMAQI
2nd Aug 2026362 PMAQI
2nd Aug 2026333 PMAQI
2nd Aug 2026304 PMAQI
2nd Aug 2026325 PMAQI
2nd Aug 2026326 PMAQI
2nd Aug 2026297 PMAQI
2nd Aug 2026268 PMAQI
2nd Aug 2026289 PMAQI
2nd Aug 20263110 PMAQI
2nd Aug 20263411 PMAQI
3rd Aug 20263412 AMAQI
3rd Aug 2026331 AMAQI
3rd Aug 2026332 AMAQI
3rd Aug 2026343 AMAQI
3rd Aug 2026394 AMAQI
27°C25/29°C
3rd Aug 2026405 AMAQI
3rd Aug 2026356 AMAQI
3rd Aug 2026397 AMAQI
3rd Aug 2026448 AMAQI
3rd Aug 2026449 AMAQI
3rd Aug 20264310 AMAQI
3rd Aug 20264411 AMAQI
3rd Aug 20264812 PMAQI
3rd Aug 2026521 PMAQI
3rd Aug 2026562 PMAQI
3rd Aug 2026563 PMAQI
3rd Aug 2026564 PMAQI
3rd Aug 2026625 PMAQI
3rd Aug 2026646 PMAQI
3rd Aug 2026687 PMAQI
3rd Aug 2026698 PMAQI
3rd Aug 2026649 PMAQI
3rd Aug 20265710 PMAQI
3rd Aug 20265411 PMAQI
4th Aug 20265512 AMAQI
4th Aug 2026531 AMAQI
4th Aug 2026512 AMAQI
4th Aug 2026523 AMAQI
4th Aug 2026514 AMAQI
28°C26/30°C
4th Aug 2026555 AMAQI
4th Aug 2026556 AMAQI
4th Aug 2026557 AMAQI
4th Aug 2026578 AMAQI
4th Aug 2026599 AMAQI
4th Aug 20266310 AMAQI
4th Aug 20266811 AMAQI
4th Aug 20266712 PMAQI
4th Aug 2026731 PMAQI
4th Aug 2026752 PMAQI
4th Aug 2026753 PMAQI
4th Aug 2026804 PMAQI
4th Aug 2026835 PMAQI
4th Aug 2026876 PMAQI
4th Aug 2026867 PMAQI
4th Aug 2026868 PMAQI
4th Aug 2026839 PMAQI
4th Aug 20267910 PMAQI
4th Aug 20268611 PMAQI
5th Aug 20269012 AMAQI
5th Aug 2026761 AMAQI
5th Aug 2026462 AMAQI
5th Aug 2026303 AMAQI
5th Aug 2026324 AMAQI
29°C27/31°C
5th Aug 2026435 AMAQI
5th Aug 2026446 AMAQI
5th Aug 2026507 AMAQI
5th Aug 2026548 AMAQI
5th Aug 2026479 AMAQI
5th Aug 20264210 AMAQI
5th Aug 20263611 AMAQI
5th Aug 20263212 PMAQI
5th Aug 2026311 PMAQI
5th Aug 2026382 PMAQI
5th Aug 2026383 PMAQI
5th Aug 2026464 PMAQI
5th Aug 2026505 PMAQI
5th Aug 2026506 PMAQI
5th Aug 2026527 PMAQI
5th Aug 2026548 PMAQI
5th Aug 2026589 PMAQI
5th Aug 20266210 PMAQI
5th Aug 20266011 PMAQI
6th Aug 20266312 AMAQI
6th Aug 2026641 AMAQI
6th Aug 2026632 AMAQI
6th Aug 2026643 AMAQI
6th Aug 2026654 AMAQI
28°C26/31°C
6th Aug 2026675 AMAQI
6th Aug 2026696 AMAQI
6th Aug 2026727 AMAQI
6th Aug 2026728 AMAQI
6th Aug 2026609 AMAQI
6th Aug 20266210 AMAQI
6th Aug 20265111 AMAQI
6th Aug 20263712 PMAQI
6th Aug 2026361 PMAQI
6th Aug 2026392 PMAQI
6th Aug 2026363 PMAQI
6th Aug 2026424 PMAQI
6th Aug 2026425 PMAQI
6th Aug 2026436 PMAQI
6th Aug 2026517 PMAQI
6th Aug 2026638 PMAQI
6th Aug 2026669 PMAQI
6th Aug 20267310 PMAQI
6th Aug 20268311 PMAQI
7th Aug 20268712 AMAQI
7th Aug 2026861 AMAQI
7th Aug 2026872 AMAQI
7th Aug 2026873 AMAQI
7th Aug 2026894 AMAQI
29°C27/31°C
7th Aug 2026905 AMAQI
7th Aug 2026916 AMAQI
7th Aug 2026967 AMAQI
7th Aug 2026918 AMAQI
7th Aug 2026909 AMAQI
7th Aug 20269010 AMAQI
7th Aug 20269111 AMAQI
7th Aug 20269112 PMAQI
7th Aug 2026821 PMAQI
7th Aug 2026442 PMAQI
7th Aug 2026473 PMAQI
7th Aug 2026484 PMAQI
7th Aug 2026505 PMAQI
7th Aug 2026666 PMAQI
7th Aug 2026687 PMAQI
7th Aug 2026638 PMAQI
7th Aug 2026609 PMAQI
7th Aug 20266410 PMAQI
7th Aug 20266711 PMAQI
8th Aug 20266912 AMAQI
8th Aug 2026731 AMAQI
8th Aug 2026722 AMAQI
8th Aug 2026683 AMAQI
8th Aug 2026644 AMAQI
30°C28/32°C
8th Aug 2026635 AMAQI
8th Aug 2026486 AMAQI
8th Aug 2026377 AMAQI
8th Aug 2026368 AMAQI
8th Aug 2026289 AMAQI
8th Aug 20262510 AMAQI
8th Aug 20262311 AMAQI
8th Aug 20262112 PMAQI
8th Aug 2026221 PMAQI
8th Aug 2026202 PMAQI
8th Aug 2026153 PMAQI
8th Aug 2026174 PMAQI
8th Aug 2026155 PMAQI
8th Aug 2026176 PMAQI
8th Aug 2026227 PMAQI
8th Aug 2026238 PMAQI
8th Aug 2026219 PMAQI
8th Aug 20262110 PMAQI
8th Aug 20261911 PMAQI
9th Aug 20261612 AMAQI
9th Aug 2026151 AMAQI
9th Aug 2026162 AMAQI
9th Aug 2026193 AMAQI
9th Aug 2026204 AMAQI
29°C25/32°C
9th Aug 2026205 AMAQI
5 AM9th Aug 2026196 AMAQI
9th Aug 2026177 AMAQI
9th Aug 2026158 AMAQI
9th Aug 2026159 AMAQI
9th Aug 20261610 AMAQI
9th Aug 20261811 AMAQI
9th Aug 20261612 PMAQI
12 PM9th Aug 2026131 PMAQI
9th Aug 2026142 PMAQI
9th Aug 2026123 PMAQI
9th Aug 2026114 PMAQI
9th Aug 2026105 PMAQI
9th Aug 2026126 PMAQI
9th Aug 2026137 PMAQI
7 PM9th Aug 2026148 PMAQI
9th Aug 2026149 PMAQI
9th Aug 20261510 PMAQI
9th Aug 20261511 PMAQI
12 AM
4 AM
26°C23/31°C
Day time
Avg. Highest Time
7 PM
48AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
5 AM - 4 PM
41AQI
12 hours / Day
360 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 7 PM to 7 PM (Avg. 48), while the lowest AQI was between 5 AM to 4 PM (Avg. 41).
Night time
Avg. Highest Time
8 PM - 9 PM
46AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
12 AM - 4 AM
42AQI
5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 8 PM to 9 PM (Avg. 46), while the lowest AQI was between 12 AM to 4 AM (Avg. 42).
2026 Days Vs Air Quality
Ansan, Gyeonggi, South Korea
2026
47%
101
45%
97
9%
19
Total number of days with different AQI categories in last 221 days in 2026 (144 days remaining)
Good
101 DaysModerate
97 DaysPoor
19 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 47%
Health Risk Level:
Significant
In 2026, 47% of 221 days were within WHO’s safe air quality limits, and 53% exceeded them. The risk of health issues is Significant, especially for those with existing respiratory or heart conditions.
Annual Air Quality Insights
Ansan, 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
25AQI (US)
25AQI (US)
2nd January 2026
39AQI (US)
39AQI (US)
3rd January 2026
56AQI (US)
56AQI (US)
4th January 2026
81AQI (US)
81AQI (US)
5th January 2026
55AQI (US)
55AQI (US)
6th January 2026
58AQI (US)
58AQI (US)
7th January 2026
59AQI (US)
59AQI (US)
8th January 2026
27AQI (US)
27AQI (US)
9th January 2026
45AQI (US)
45AQI (US)
10th January 2026
60AQI (US)
60AQI (US)
11th January 2026
30AQI (US)
30AQI (US)
12th January 2026
40AQI (US)
40AQI (US)
13th January 2026
42AQI (US)
42AQI (US)
14th January 2026
34AQI (US)
34AQI (US)
15th January 2026
85AQI (US)
85AQI (US)
16th January 2026
124AQI (US)
124AQI (US)
17th January 2026
121AQI (US)
121AQI (US)
18th January 2026
87AQI (US)
87AQI (US)
19th January 2026
62AQI (US)
62AQI (US)
20th January 2026
36AQI (US)
36AQI (US)
21st January 2026
37AQI (US)
37AQI (US)
22nd January 2026
27AQI (US)
27AQI (US)
23rd January 2026
53AQI (US)
53AQI (US)
24th January 2026
49AQI (US)
49AQI (US)
25th January 2026
28AQI (US)
28AQI (US)
26th January 2026
52AQI (US)
52AQI (US)
27th January 2026
58AQI (US)
58AQI (US)
28th January 2026
34AQI (US)
34AQI (US)
29th January 2026
44AQI (US)
44AQI (US)
30th January 2026
60AQI (US)
60AQI (US)
31st January 2026
60AQI (US)
60AQI (US)
1st February 2026
64AQI (US)
64AQI (US)
2nd February 2026
71AQI (US)
71AQI (US)
3rd February 2026
55AQI (US)
55AQI (US)
4th February 2026
113AQI (US)
113AQI (US)
5th February 2026
124AQI (US)
124AQI (US)
6th February 2026
63AQI (US)
63AQI (US)
7th February 2026
35AQI (US)
35AQI (US)
8th February 2026
49AQI (US)
49AQI (US)
9th February 2026
44AQI (US)
44AQI (US)
10th February 2026
89AQI (US)
89AQI (US)
11th February 2026
113AQI (US)
113AQI (US)
12th February 2026
113AQI (US)
113AQI (US)
13th February 2026
135AQI (US)
135AQI (US)
14th February 2026
141AQI (US)
141AQI (US)
15th February 2026
108AQI (US)
108AQI (US)
16th February 2026
47AQI (US)
47AQI (US)
17th February 2026
45AQI (US)
45AQI (US)
18th February 2026
47AQI (US)
47AQI (US)
19th February 2026
44AQI (US)
44AQI (US)
20th February 2026
78AQI (US)
78AQI (US)
21st February 2026
94AQI (US)
94AQI (US)
22nd February 2026
50AQI (US)
50AQI (US)
23rd February 2026
29AQI (US)
29AQI (US)
24th February 2026
35AQI (US)
35AQI (US)
25th February 2026
58AQI (US)
58AQI (US)
26th February 2026
45AQI (US)
45AQI (US)
27th February 2026
27AQI (US)
27AQI (US)
28th February 2026
41AQI (US)
41AQI (US)
1st March 2026
36AQI (US)
36AQI (US)
2nd March 2026
15AQI (US)
15AQI (US)
3rd March 2026
22AQI (US)
22AQI (US)
4th March 2026
68AQI (US)
68AQI (US)
5th March 2026
98AQI (US)
98AQI (US)
6th March 2026
72AQI (US)
72AQI (US)
7th March 2026
47AQI (US)
47AQI (US)
8th March 2026
55AQI (US)
55AQI (US)
9th March 2026
96AQI (US)
96AQI (US)
10th March 2026
87AQI (US)
87AQI (US)
11th March 2026
88AQI (US)
88AQI (US)
12th March 2026
108AQI (US)
108AQI (US)
13th March 2026
46AQI (US)
46AQI (US)
14th March 2026
56AQI (US)
56AQI (US)
15th March 2026
92AQI (US)
92AQI (US)
16th March 2026
131AQI (US)
131AQI (US)
17th March 2026
145AQI (US)
145AQI (US)
18th March 2026
109AQI (US)
109AQI (US)
19th March 2026
46AQI (US)
46AQI (US)
20th March 2026
57AQI (US)
57AQI (US)
21st March 2026
96AQI (US)
96AQI (US)
22nd March 2026
91AQI (US)
91AQI (US)
23rd March 2026
115AQI (US)
115AQI (US)
24th March 2026
107AQI (US)
107AQI (US)
25th March 2026
91AQI (US)
91AQI (US)
26th March 2026
94AQI (US)
94AQI (US)
27th March 2026
118AQI (US)
118AQI (US)
28th March 2026
95AQI (US)
95AQI (US)
29th March 2026
98AQI (US)
98AQI (US)
30th March 2026
89AQI (US)
89AQI (US)
31st March 2026
65AQI (US)
65AQI (US)
1st April 2026
77AQI (US)
77AQI (US)
2nd April 2026
97AQI (US)
97AQI (US)
3rd April 2026
122AQI (US)
122AQI (US)
4th April 2026
54AQI (US)
54AQI (US)
5th April 2026
78AQI (US)
78AQI (US)
6th April 2026
55AQI (US)
55AQI (US)
7th April 2026
26AQI (US)
26AQI (US)
8th April 2026
48AQI (US)
48AQI (US)
9th April 2026
41AQI (US)
41AQI (US)
10th April 2026
39AQI (US)
39AQI (US)
11th April 2026
75AQI (US)
75AQI (US)
12th April 2026
76AQI (US)
76AQI (US)
13th April 2026
73AQI (US)
73AQI (US)
14th April 2026
91AQI (US)
91AQI (US)
15th April 2026
127AQI (US)
127AQI (US)
16th April 2026
59AQI (US)
59AQI (US)
17th April 2026
18th April 2026
54AQI (US)
54AQI (US)
19th April 2026
70AQI (US)
70AQI (US)
20th April 2026
63AQI (US)
63AQI (US)
21st April 2026
67AQI (US)
67AQI (US)
22nd April 2026
23rd April 2026
47AQI (US)
47AQI (US)
24th April 2026
40AQI (US)
40AQI (US)
25th April 2026
61AQI (US)
61AQI (US)
26th April 2026
60AQI (US)
60AQI (US)
27th April 2026
48AQI (US)
48AQI (US)
28th April 2026
36AQI (US)
36AQI (US)
29th April 2026
45AQI (US)
45AQI (US)
30th April 2026
51AQI (US)
51AQI (US)
1st May 2026
48AQI (US)
48AQI (US)
2nd May 2026
107AQI (US)
107AQI (US)
3rd May 2026
48AQI (US)
48AQI (US)
4th May 2026
26AQI (US)
26AQI (US)
5th May 2026
44AQI (US)
44AQI (US)
6th May 2026
33AQI (US)
33AQI (US)
7th May 2026
41AQI (US)
41AQI (US)
8th May 2026
37AQI (US)
37AQI (US)
9th May 2026
10th May 2026
31AQI (US)
31AQI (US)
11th May 2026
33AQI (US)
33AQI (US)
12th May 2026
37AQI (US)
37AQI (US)
13th May 2026
45AQI (US)
45AQI (US)
14th May 2026
61AQI (US)
61AQI (US)
15th May 2026
78AQI (US)
78AQI (US)
16th May 2026
77AQI (US)
77AQI (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
72AQI (US)
72AQI (US)
24th May 2026
70AQI (US)
70AQI (US)
25th May 2026
65AQI (US)
65AQI (US)
26th May 2026
48AQI (US)
48AQI (US)
27th May 2026
33AQI (US)
33AQI (US)
28th May 2026
36AQI (US)
36AQI (US)
29th May 2026
59AQI (US)
59AQI (US)
30th May 2026
64AQI (US)
64AQI (US)
31st May 2026
54AQI (US)
54AQI (US)
1st June 2026
55AQI (US)
55AQI (US)
2nd June 2026
64AQI (US)
64AQI (US)
3rd June 2026
76AQI (US)
76AQI (US)
4th June 2026
74AQI (US)
74AQI (US)
5th June 2026
24AQI (US)
24AQI (US)
6th June 2026
40AQI (US)
40AQI (US)
7th June 2026
26AQI (US)
26AQI (US)
8th June 2026
36AQI (US)
36AQI (US)
9th June 2026
29AQI (US)
29AQI (US)
10th June 2026
58AQI (US)
58AQI (US)
11th June 2026
57AQI (US)
57AQI (US)
12th June 2026
51AQI (US)
51AQI (US)
13th June 2026
51AQI (US)
51AQI (US)
14th June 2026
52AQI (US)
52AQI (US)
15th June 2026
55AQI (US)
55AQI (US)
16th June 2026
76AQI (US)
76AQI (US)
17th June 2026
77AQI (US)
77AQI (US)
18th June 2026
52AQI (US)
52AQI (US)
19th June 2026
66AQI (US)
66AQI (US)
20th June 2026
20AQI (US)
20AQI (US)
21st June 2026
17AQI (US)
17AQI (US)
22nd June 2026
36AQI (US)
36AQI (US)
23rd June 2026
46AQI (US)
46AQI (US)
24th June 2026
18AQI (US)
18AQI (US)
25th June 2026
26AQI (US)
26AQI (US)
26th June 2026
36AQI (US)
36AQI (US)
27th June 2026
58AQI (US)
58AQI (US)
28th June 2026
46AQI (US)
46AQI (US)
29th June 2026
48AQI (US)
48AQI (US)
30th June 2026
43AQI (US)
43AQI (US)
1st July 2026
56AQI (US)
56AQI (US)
2nd July 2026
51AQI (US)
51AQI (US)
3rd July 2026
35AQI (US)
35AQI (US)
4th July 2026
51AQI (US)
51AQI (US)
5th July 2026
36AQI (US)
36AQI (US)
6th July 2026
43AQI (US)
43AQI (US)
7th July 2026
42AQI (US)
42AQI (US)
8th July 2026
28AQI (US)
28AQI (US)
9th July 2026
24AQI (US)
24AQI (US)
10th July 2026
28AQI (US)
28AQI (US)
11th July 2026
31AQI (US)
31AQI (US)
12th July 2026
33AQI (US)
33AQI (US)
13th July 2026
35AQI (US)
35AQI (US)
14th July 2026
33AQI (US)
33AQI (US)
15th July 2026
39AQI (US)
39AQI (US)
16th July 2026
60AQI (US)
60AQI (US)
17th July 2026
69AQI (US)
69AQI (US)
18th July 2026
47AQI (US)
47AQI (US)
19th July 2026
33AQI (US)
33AQI (US)
20th July 2026
29AQI (US)
29AQI (US)
21st July 2026
34AQI (US)
34AQI (US)
22nd July 2026
41AQI (US)
41AQI (US)
23rd July 2026
55AQI (US)
55AQI (US)
24th July 2026
48AQI (US)
48AQI (US)
25th July 2026
30AQI (US)
30AQI (US)
26th July 2026
28AQI (US)
28AQI (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
26AQI (US)
26AQI (US)
31st July 2026
37AQI (US)
37AQI (US)
1st August 2026
73AQI (US)
73AQI (US)
2nd August 2026
39AQI (US)
39AQI (US)
3rd August 2026
49AQI (US)
49AQI (US)
4th August 2026
68AQI (US)
68AQI (US)
5th August 2026
48AQI (US)
48AQI (US)
6th August 2026
58AQI (US)
58AQI (US)
7th August 2026
76AQI (US)
76AQI (US)
8th August 2026
35AQI (US)
35AQI (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
54AQI (US)
70AQI (US)
82AQI (US)
64AQI (US)
54AQI (US)
47AQI (US)
39AQI (US)
56AQI (US)
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202658AQI (US)
15
14
2
13
8
7
6
18
7
9
17
2
14
15
1
15
15
25
6
4
4
101
97
19
Highest AQI (US) recorded in
March82AQI (US)
Lowest AQI (US) recorded in
July39AQI (US)
202562AQI (US)
3
23
5
6
21
1
4
17
10
5
25
8
23
1
29
10
21
16
15
23
7
20
11
7
19
4
9
20
2
112
231
22
Highest AQI (US) recorded in
March84AQI (US)
Lowest AQI (US) recorded in
September43AQI (US)
202462AQI (US)
10
15
6
10
12
6
1
6
21
2
2
2
25
3
10
21
6
24
23
7
1
10
21
23
7
14
16
1
9
21
7
24
130
214
19
3
Highest AQI (US) recorded in
January78AQI (US)
Lowest AQI (US) recorded in
September42AQI (US)
202368AQI (US)
7
16
6
2
2
19
5
2
2
16
13
5
20
4
1
5
24
2
5
25
14
16
1
15
16
16
14
11
19
1
12
15
2
11
16
4
105
216
38
5
Highest AQI (US) recorded in
March93AQI (US)
Lowest AQI (US) recorded in
September49AQI (US)
202267AQI (US)
2
19
7
2
4
12
4
2
6
18
7
7
18
5
7
22
2
18
12
6
19
3
1
18
9
2
17
11
3
5
18
6
1
8
21
2
101
180
38
5
Highest AQI (US) recorded in
January87AQI (US)
Lowest AQI (US) recorded in
August34AQI (US)
202168AQI (US)
8
19
3
7
13
6
2
4
16
8
2
1
8
19
3
11
17
1
2
6
22
2
11
19
1
18
13
25
5
13
18
6
18
4
2
8
13
10
125
192
38
6
1
2
Highest AQI (US) recorded in
March99AQI (US)
Lowest AQI (US) recorded in
September39AQI (US)
202061AQI (US)
3
9
1
5
16
6
12
6
23
1
16
13
2
17
14
21
9
12
16
3
9
13
8
7
16
7
1
102
141
22
1
Highest AQI (US) recorded in
December79AQI (US)
Lowest AQI (US) recorded in
September44AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Most Polluted Year Recorded
2023(Avg.)
68AQI (US)Least Polluted Year Recorded
2026(Avg.)
58AQI (US)Ansan's annual 2026 AQI (US) (58) shows an average percentage change of -10.1% (improved AQI (US)) compared to previous years: 2020 (61), 2021 (68), 2022 (67), 2023 (68), 2024 (62), 2025 (62).
