Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Chillan, Biobio, Chile 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+

July Air Quality Analysis

Chillan, Biobio, Chile

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
13th Jul 2024
202AQI
Lowest AQI recorded on
22nd Jul 2026
24AQI

Same Day Analysis (28th July):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 30 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.

Day & Night AQI Trend: 27th Jul - 28th Jul 2026

Chillan, Biobio, Chile

AQI
Day
Night
.

7 AM27th Jul 2026

5 PM

6 AM28th Jul 2026

Day time
Avg. Highest Time
5PM27th Jul

44AQI

Avg. Lowest Time
3PM27th Jul

23AQI

Night time
Avg. Highest Time
9PM27th Jul

37AQI

Avg. Lowest Time
6AM28th Jul

23AQI

In the last 24 hours,

Chillan's AQI reached its highest point of 44 at 5 PM during the Day, while the lowest point, 23, was recorded at 6 AM during the Night between 27th Jul and 28th Jul 2026.

Day & Night AQI Trend : Jun - Jul 2026

Chillan, Biobio, Chile

JunJul
29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th
Day
Night
29th Jun 2026267 AMAQI
29th Jun 2026458 AMAQI
29th Jun 2026619 AMAQI
29th Jun 20266710 AMAQI
29th Jun 20267511 AMAQI
29th Jun 20265412 PMAQI
29th Jun 2026251 PMAQI
29th Jun 2026152 PMAQI
29th Jun 2026133 PMAQI
29th Jun 2026184 PMAQI
29th Jun 2026215 PMAQI
29th Jun 2026206 PMAQI
29th Jun 2026207 PMAQI
29th Jun 2026868 PMAQI
29th Jun 20261079 PMAQI
29th Jun 202611810 PMAQI
29th Jun 202610411 PMAQI
30th Jun 20269112 AMAQI
30th Jun 20261031 AMAQI
30th Jun 2026682 AMAQI
30th Jun 2026543 AMAQI
30th Jun 2026444 AMAQI
30th Jun 2026365 AMAQI
30th Jun 2026386 AMAQI

7°C3/14°C

30th Jun 2026547 AMAQI
30th Jun 2026468 AMAQI
30th Jun 2026329 AMAQI
30th Jun 20262710 AMAQI
30th Jun 20262611 AMAQI
30th Jun 20263412 PMAQI
30th Jun 2026381 PMAQI
30th Jun 2026372 PMAQI
30th Jun 2026213 PMAQI
30th Jun 2026214 PMAQI
30th Jun 2026345 PMAQI
30th Jun 2026346 PMAQI
30th Jun 2026547 PMAQI
30th Jun 2026848 PMAQI
30th Jun 2026949 PMAQI
30th Jun 20268010 PMAQI
30th Jun 202610511 PMAQI
1st Jul 20269012 AMAQI
1st Jul 20261481 AMAQI
1st Jul 20261092 AMAQI
1st Jul 2026693 AMAQI
1st Jul 2026624 AMAQI
1st Jul 2026365 AMAQI
1st Jul 2026276 AMAQI

5°C0/11°C

1st Jul 2026487 AMAQI
1st Jul 2026578 AMAQI
1st Jul 2026449 AMAQI
1st Jul 20266410 AMAQI
1st Jul 20266611 AMAQI
1st Jul 20268412 PMAQI
1st Jul 2026661 PMAQI
1st Jul 2026542 PMAQI
1st Jul 2026533 PMAQI
1st Jul 2026544 PMAQI
1st Jul 2026685 PMAQI
1st Jul 2026596 PMAQI
1st Jul 2026697 PMAQI
1st Jul 2026848 PMAQI
1st Jul 20261129 PMAQI
1st Jul 202614910 PMAQI
1st Jul 202612811 PMAQI
2nd Jul 202612812 AMAQI
2nd Jul 20261271 AMAQI
2nd Jul 20261212 AMAQI
2nd Jul 20261303 AMAQI
2nd Jul 20261504 AMAQI
2nd Jul 20261505 AMAQI
2nd Jul 2026866 AMAQI

5°C1/12°C

2nd Jul 2026927 AMAQI
2nd Jul 2026628 AMAQI
2nd Jul 2026589 AMAQI
2nd Jul 20266710 AMAQI
2nd Jul 20267611 AMAQI
2nd Jul 20269912 PMAQI
2nd Jul 20261461 PMAQI
2nd Jul 20261142 PMAQI
2nd Jul 20261083 PMAQI
2nd Jul 20261164 PMAQI
2nd Jul 20261005 PMAQI
2nd Jul 2026916 PMAQI
2nd Jul 2026727 PMAQI
2nd Jul 20261068 PMAQI
2nd Jul 20261439 PMAQI
2nd Jul 202612510 PMAQI
2nd Jul 202615011 PMAQI
3rd Jul 202617112 AMAQI
3rd Jul 20261581 AMAQI
3rd Jul 20261612 AMAQI
3rd Jul 20261493 AMAQI
3rd Jul 20261594 AMAQI
3rd Jul 20261455 AMAQI
3rd Jul 20261316 AMAQI

5°C0/11°C

3rd Jul 20261127 AMAQI
3rd Jul 20261318 AMAQI
3rd Jul 20261189 AMAQI
3rd Jul 20269510 AMAQI
3rd Jul 202611611 AMAQI
3rd Jul 202613212 PMAQI
3rd Jul 20261461 PMAQI
3rd Jul 20261412 PMAQI
3rd Jul 20261383 PMAQI
3rd Jul 20261444 PMAQI
3rd Jul 20261415 PMAQI
3rd Jul 20261396 PMAQI
3rd Jul 20261427 PMAQI
3rd Jul 20261368 PMAQI
3rd Jul 20261349 PMAQI
3rd Jul 202614510 PMAQI
3rd Jul 202612711 PMAQI
4th Jul 202610712 AMAQI
4th Jul 20261241 AMAQI
4th Jul 20261372 AMAQI
4th Jul 20261453 AMAQI
4th Jul 20261374 AMAQI
4th Jul 20261405 AMAQI
4th Jul 20261476 AMAQI

5°C0/12°C

4th Jul 20261467 AMAQI
4th Jul 20261418 AMAQI
4th Jul 20261189 AMAQI
4th Jul 202612110 AMAQI
4th Jul 202612411 AMAQI
4th Jul 202613912 PMAQI
4th Jul 20261561 PMAQI
4th Jul 20261672 PMAQI
4th Jul 20261483 PMAQI
4th Jul 20261244 PMAQI
4th Jul 20261305 PMAQI
4th Jul 20261386 PMAQI
4th Jul 20261627 PMAQI
4th Jul 20261648 PMAQI
4th Jul 20261649 PMAQI
4th Jul 202616410 PMAQI
4th Jul 202615211 PMAQI
5th Jul 202616012 AMAQI
5th Jul 20261571 AMAQI
5th Jul 20261562 AMAQI
5th Jul 20261583 AMAQI
5th Jul 20261434 AMAQI
5th Jul 20261235 AMAQI
5th Jul 20261156 AMAQI

5°C1/10°C

5th Jul 20261117 AMAQI
5th Jul 20261098 AMAQI
5th Jul 20261099 AMAQI
5th Jul 202611110 AMAQI
5th Jul 20269811 AMAQI
5th Jul 202612812 PMAQI
5th Jul 20261461 PMAQI
5th Jul 20261662 PMAQI
5th Jul 20261643 PMAQI
5th Jul 20261484 PMAQI
5th Jul 20261105 PMAQI
5th Jul 2026876 PMAQI
5th Jul 2026747 PMAQI
5th Jul 20261328 PMAQI
5th Jul 2026869 PMAQI
5th Jul 202611010 PMAQI
5th Jul 202616211 PMAQI
6th Jul 202616312 AMAQI
6th Jul 20261581 AMAQI
6th Jul 20261622 AMAQI
6th Jul 20261673 AMAQI
6th Jul 20261684 AMAQI
6th Jul 20261605 AMAQI
6th Jul 20261486 AMAQI

8°C5/14°C

6th Jul 20261397 AMAQI
6th Jul 20261248 AMAQI
6th Jul 20261269 AMAQI
6th Jul 202613610 AMAQI
6th Jul 202614611 AMAQI
6th Jul 202615412 PMAQI
6th Jul 20261341 PMAQI
6th Jul 20261262 PMAQI
6th Jul 20261633 PMAQI
6th Jul 20261474 PMAQI
6th Jul 20261465 PMAQI
6th Jul 20261356 PMAQI
6th Jul 20261277 PMAQI
6th Jul 20261048 PMAQI
6th Jul 20261459 PMAQI
6th Jul 202611810 PMAQI
6th Jul 20268011 PMAQI
7th Jul 202616512 AMAQI
7th Jul 20261521 AMAQI
7th Jul 20261432 AMAQI
7th Jul 2026843 AMAQI
7th Jul 2026534 AMAQI
7th Jul 20261595 AMAQI
7th Jul 20261646 AMAQI

8°C2/15°C

7th Jul 20261467 AMAQI
7th Jul 20261328 AMAQI
7th Jul 20261219 AMAQI
7th Jul 202612710 AMAQI
7th Jul 202612211 AMAQI
7th Jul 202612912 PMAQI
7th Jul 20261291 PMAQI
7th Jul 20261322 PMAQI
7th Jul 20261413 PMAQI
7th Jul 20261564 PMAQI
7th Jul 20261475 PMAQI
7th Jul 20261556 PMAQI
7th Jul 20261587 PMAQI
7th Jul 20261608 PMAQI
7th Jul 20261449 PMAQI
7th Jul 202612810 PMAQI
7th Jul 202616711 PMAQI
8th Jul 202615812 AMAQI
8th Jul 20261571 AMAQI
8th Jul 20261582 AMAQI
8th Jul 20261603 AMAQI
8th Jul 20261624 AMAQI
8th Jul 20261595 AMAQI
8th Jul 20261506 AMAQI

11°C8/17°C

8th Jul 20261547 AMAQI
8th Jul 20261588 AMAQI
8th Jul 20261449 AMAQI
8th Jul 202610910 AMAQI
8th Jul 20262911 AMAQI
8th Jul 20268712 PMAQI
8th Jul 2026941 PMAQI
8th Jul 2026622 PMAQI
8th Jul 2026223 PMAQI
8th Jul 2026284 PMAQI
8th Jul 2026255 PMAQI
8th Jul 2026596 PMAQI
8th Jul 2026887 PMAQI
8th Jul 2026988 PMAQI
8th Jul 2026779 PMAQI
8th Jul 20267010 PMAQI
8th Jul 20266811 PMAQI
9th Jul 20267912 AMAQI
9th Jul 2026881 AMAQI
9th Jul 2026982 AMAQI
9th Jul 20261063 AMAQI
9th Jul 2026774 AMAQI
9th Jul 2026645 AMAQI
9th Jul 2026606 AMAQI

10°C9/12°C

9th Jul 2026647 AMAQI
9th Jul 2026628 AMAQI
9th Jul 2026609 AMAQI
9th Jul 20265610 AMAQI
9th Jul 20265011 AMAQI
9th Jul 20265012 PMAQI
9th Jul 2026571 PMAQI
9th Jul 2026602 PMAQI
9th Jul 2026603 PMAQI
9th Jul 2026604 PMAQI
9th Jul 2026635 PMAQI
9th Jul 2026746 PMAQI
9th Jul 2026847 PMAQI
9th Jul 20261008 PMAQI
9th Jul 20261229 PMAQI
9th Jul 202612210 PMAQI
9th Jul 202612011 PMAQI
10th Jul 20269312 AMAQI
10th Jul 2026741 AMAQI
10th Jul 2026562 AMAQI
10th Jul 2026443 AMAQI
10th Jul 2026444 AMAQI
10th Jul 2026275 AMAQI
10th Jul 2026276 AMAQI

10°C8/12°C

10th Jul 2026197 AMAQI
10th Jul 2026128 AMAQI
10th Jul 2026149 AMAQI
10th Jul 20262110 AMAQI
10th Jul 20262211 AMAQI
10th Jul 20262412 PMAQI
10th Jul 2026221 PMAQI
10th Jul 2026222 PMAQI
10th Jul 2026223 PMAQI
10th Jul 2026234 PMAQI
10th Jul 2026265 PMAQI
10th Jul 2026406 PMAQI
10th Jul 2026517 PMAQI
10th Jul 2026528 PMAQI
10th Jul 2026529 PMAQI
10th Jul 20266710 PMAQI
10th Jul 20265911 PMAQI
11th Jul 20265612 AMAQI
11th Jul 2026581 AMAQI
11th Jul 2026502 AMAQI
11th Jul 2026383 AMAQI
11th Jul 2026364 AMAQI
11th Jul 2026325 AMAQI
11th Jul 2026296 AMAQI

13°C11/14°C

11th Jul 2026207 AMAQI
11th Jul 2026168 AMAQI
11th Jul 2026329 AMAQI
11th Jul 20265310 AMAQI
11th Jul 20265411 AMAQI
11th Jul 20265612 PMAQI
11th Jul 2026581 PMAQI
11th Jul 2026502 PMAQI
11th Jul 2026383 PMAQI
11th Jul 2026434 PMAQI
11th Jul 2026385 PMAQI
11th Jul 2026346 PMAQI
11th Jul 2026507 PMAQI
11th Jul 2026718 PMAQI
11th Jul 2026889 PMAQI
11th Jul 20268810 PMAQI
11th Jul 20268211 PMAQI
12th Jul 20268212 AMAQI
12th Jul 2026941 AMAQI
12th Jul 20261022 AMAQI
12th Jul 2026793 AMAQI
12th Jul 2026584 AMAQI
12th Jul 2026515 AMAQI
12th Jul 2026526 AMAQI

11°C7/16°C

12th Jul 2026547 AMAQI
12th Jul 2026568 AMAQI
12th Jul 2026549 AMAQI
12th Jul 20266010 AMAQI
12th Jul 20266611 AMAQI
12th Jul 20266412 PMAQI
12th Jul 2026881 PMAQI
12th Jul 2026842 PMAQI
12th Jul 2026943 PMAQI
12th Jul 20261004 PMAQI
12th Jul 20261045 PMAQI
12th Jul 20261216 PMAQI
12th Jul 20261207 PMAQI
12th Jul 20261288 PMAQI
12th Jul 20261369 PMAQI
12th Jul 202612810 PMAQI
12th Jul 202610411 PMAQI
13th Jul 202610812 AMAQI
13th Jul 20261221 AMAQI
13th Jul 2026882 AMAQI
13th Jul 2026963 AMAQI
13th Jul 2026824 AMAQI
13th Jul 2026665 AMAQI
13th Jul 2026646 AMAQI

11°C8/17°C

13th Jul 2026607 AMAQI
13th Jul 2026598 AMAQI
13th Jul 2026599 AMAQI
13th Jul 20266210 AMAQI
13th Jul 20267811 AMAQI
13th Jul 20267512 PMAQI
13th Jul 2026661 PMAQI
13th Jul 2026702 PMAQI
13th Jul 2026643 PMAQI
13th Jul 2026354 PMAQI
13th Jul 2026405 PMAQI
13th Jul 2026546 PMAQI
13th Jul 2026867 PMAQI
13th Jul 20261128 PMAQI
13th Jul 20261369 PMAQI
13th Jul 202614010 PMAQI
13th Jul 202612711 PMAQI
14th Jul 202610512 AMAQI
14th Jul 20261301 AMAQI
14th Jul 20261222 AMAQI
14th Jul 20261203 AMAQI
14th Jul 20261124 AMAQI
14th Jul 2026955 AMAQI
14th Jul 2026646 AMAQI

12°C9/16°C

14th Jul 2026647 AMAQI
14th Jul 2026568 AMAQI
14th Jul 2026479 AMAQI
14th Jul 20263810 AMAQI
14th Jul 20263811 AMAQI
14th Jul 20263412 PMAQI
14th Jul 2026271 PMAQI
14th Jul 2026222 PMAQI
14th Jul 2026263 PMAQI
14th Jul 2026204 PMAQI
14th Jul 2026425 PMAQI
14th Jul 2026326 PMAQI
14th Jul 2026397 PMAQI
14th Jul 2026428 PMAQI
14th Jul 2026409 PMAQI
14th Jul 20263810 PMAQI
14th Jul 20263911 PMAQI
15th Jul 20264012 AMAQI
15th Jul 2026361 AMAQI
15th Jul 2026322 AMAQI
15th Jul 2026363 AMAQI
15th Jul 2026294 AMAQI
15th Jul 2026185 AMAQI
15th Jul 2026126 AMAQI

12°C10/14°C

15th Jul 2026187 AMAQI
15th Jul 2026208 AMAQI
15th Jul 2026199 AMAQI
15th Jul 20261810 AMAQI
15th Jul 20262011 AMAQI
15th Jul 20263412 PMAQI
15th Jul 2026281 PMAQI
15th Jul 2026282 PMAQI
15th Jul 2026413 PMAQI
15th Jul 2026504 PMAQI
15th Jul 2026365 PMAQI
15th Jul 2026446 PMAQI
15th Jul 2026467 PMAQI
15th Jul 2026528 PMAQI
15th Jul 2026429 PMAQI
15th Jul 20264010 PMAQI
15th Jul 20264111 PMAQI
16th Jul 20263812 AMAQI
16th Jul 2026361 AMAQI
16th Jul 2026322 AMAQI
16th Jul 2026343 AMAQI
16th Jul 2026324 AMAQI
16th Jul 2026305 AMAQI
16th Jul 2026406 AMAQI

12°C12/13°C

16th Jul 2026347 AMAQI
16th Jul 2026278 AMAQI
16th Jul 2026329 AMAQI
16th Jul 20263110 AMAQI
16th Jul 20262411 AMAQI
16th Jul 20261912 PMAQI
16th Jul 2026141 PMAQI
16th Jul 2026202 PMAQI
16th Jul 2026243 PMAQI
16th Jul 2026224 PMAQI
16th Jul 2026235 PMAQI
16th Jul 2026276 PMAQI
16th Jul 2026327 PMAQI
16th Jul 2026508 PMAQI
16th Jul 2026469 PMAQI
16th Jul 20267010 PMAQI
16th Jul 20266811 PMAQI
17th Jul 20265012 AMAQI
17th Jul 2026401 AMAQI
17th Jul 2026322 AMAQI
17th Jul 2026283 AMAQI
17th Jul 2026244 AMAQI
17th Jul 2026395 AMAQI
17th Jul 2026166 AMAQI

12°C10/14°C

17th Jul 2026227 AMAQI
17th Jul 2026238 AMAQI
17th Jul 2026189 AMAQI
17th Jul 20263610 AMAQI
17th Jul 20266311 AMAQI
17th Jul 20267312 PMAQI
17th Jul 2026601 PMAQI
17th Jul 2026592 PMAQI
17th Jul 2026493 PMAQI
17th Jul 2026504 PMAQI
17th Jul 2026425 PMAQI
17th Jul 2026626 PMAQI
17th Jul 2026667 PMAQI
17th Jul 2026608 PMAQI
17th Jul 2026469 PMAQI
17th Jul 20266810 PMAQI
17th Jul 20266111 PMAQI
18th Jul 20267412 AMAQI
18th Jul 2026391 AMAQI
18th Jul 2026282 AMAQI
18th Jul 2026543 AMAQI
18th Jul 2026244 AMAQI
18th Jul 2026285 AMAQI
18th Jul 2026106 AMAQI

10°C8/11°C

18th Jul 2026127 AMAQI
18th Jul 2026308 AMAQI
18th Jul 2026299 AMAQI
18th Jul 20263210 AMAQI
18th Jul 20262211 AMAQI
18th Jul 20261812 PMAQI
18th Jul 2026391 PMAQI
18th Jul 2026272 PMAQI
18th Jul 2026323 PMAQI
18th Jul 2026324 PMAQI
18th Jul 2026385 PMAQI
18th Jul 2026326 PMAQI
18th Jul 2026327 PMAQI
18th Jul 2026308 PMAQI
18th Jul 2026389 PMAQI
18th Jul 20265410 PMAQI
18th Jul 20263911 PMAQI
19th Jul 20266412 AMAQI
19th Jul 2026411 AMAQI
19th Jul 2026242 AMAQI
19th Jul 2026223 AMAQI
19th Jul 2026164 AMAQI
19th Jul 2026185 AMAQI
19th Jul 2026316 AMAQI

10°C8/13°C

19th Jul 2026167 AMAQI
19th Jul 2026188 AMAQI
19th Jul 2026309 AMAQI
19th Jul 20263210 AMAQI
19th Jul 20268611 AMAQI
19th Jul 20266412 PMAQI
19th Jul 2026411 PMAQI
19th Jul 2026162 PMAQI
19th Jul 2026183 PMAQI
19th Jul 2026124 PMAQI
19th Jul 2026225 PMAQI
19th Jul 2026326 PMAQI
19th Jul 2026577 PMAQI
19th Jul 2026788 PMAQI
19th Jul 2026769 PMAQI
19th Jul 20269610 PMAQI
19th Jul 202611611 PMAQI
20th Jul 202611412 AMAQI
20th Jul 20261111 AMAQI
20th Jul 2026982 AMAQI
20th Jul 2026883 AMAQI
20th Jul 2026584 AMAQI
20th Jul 2026365 AMAQI
20th Jul 2026486 AMAQI

9°C6/12°C

20th Jul 2026487 AMAQI
20th Jul 2026538 AMAQI
20th Jul 2026559 AMAQI
20th Jul 20265810 AMAQI
20th Jul 20266311 AMAQI
20th Jul 20265712 PMAQI
20th Jul 2026361 PMAQI
20th Jul 2026322 PMAQI
20th Jul 2026273 PMAQI
20th Jul 2026344 PMAQI
20th Jul 2026235 PMAQI
20th Jul 2026246 PMAQI
20th Jul 2026807 PMAQI
20th Jul 2026648 PMAQI
20th Jul 2026819 PMAQI
20th Jul 202613710 PMAQI
21st Jul 202613112 AMAQI
21st Jul 20261201 AMAQI
21st Jul 20261042 AMAQI
21st Jul 20261413 AMAQI
21st Jul 20261034 AMAQI
21st Jul 2026645 AMAQI
21st Jul 2026706 AMAQI

7°C5/10°C

21st Jul 2026247 AMAQI
21st Jul 202688 AMAQI
21st Jul 2026419 AMAQI
21st Jul 20262410 AMAQI
21st Jul 2026911 AMAQI
21st Jul 20267912 PMAQI
21st Jul 2026601 PMAQI
21st Jul 2026372 PMAQI
21st Jul 2026403 PMAQI
21st Jul 2026244 PMAQI
21st Jul 2026205 PMAQI
21st Jul 2026166 PMAQI
21st Jul 2026167 PMAQI
21st Jul 2026288 PMAQI
21st Jul 2026309 PMAQI
21st Jul 20262210 PMAQI
21st Jul 20261911 PMAQI
22nd Jul 20262212 AMAQI
22nd Jul 2026161 AMAQI
22nd Jul 2026182 AMAQI
22nd Jul 2026113 AMAQI
22nd Jul 2026164 AMAQI
22nd Jul 2026185 AMAQI
22nd Jul 202696 AMAQI

9°C6/11°C

22nd Jul 2026107 AMAQI
22nd Jul 202688 AMAQI
22nd Jul 202689 AMAQI
22nd Jul 2026910 AMAQI
22nd Jul 20261311 AMAQI
22nd Jul 20262512 PMAQI
22nd Jul 2026341 PMAQI
22nd Jul 2026322 PMAQI
22nd Jul 2026303 PMAQI
22nd Jul 2026284 PMAQI
22nd Jul 2026285 PMAQI
22nd Jul 2026366 PMAQI
22nd Jul 2026307 PMAQI
22nd Jul 2026488 PMAQI
22nd Jul 2026529 PMAQI
22nd Jul 20264410 PMAQI
22nd Jul 20264211 PMAQI
23rd Jul 20264012 AMAQI
23rd Jul 2026381 AMAQI
23rd Jul 2026402 AMAQI
23rd Jul 2026383 AMAQI
23rd Jul 2026254 AMAQI
23rd Jul 2026205 AMAQI
23rd Jul 2026236 AMAQI

11°C10/14°C

23rd Jul 2026207 AMAQI
23rd Jul 2026148 AMAQI
23rd Jul 2026299 AMAQI
23rd Jul 20262110 AMAQI
23rd Jul 20261811 AMAQI
23rd Jul 20262212 PMAQI
23rd Jul 2026221 PMAQI
23rd Jul 2026222 PMAQI
23rd Jul 2026213 PMAQI
23rd Jul 2026244 PMAQI
23rd Jul 2026305 PMAQI
23rd Jul 2026236 PMAQI
23rd Jul 2026377 PMAQI
23rd Jul 2026548 PMAQI
23rd Jul 2026589 PMAQI
23rd Jul 20266210 PMAQI
23rd Jul 20265411 PMAQI
24th Jul 20265312 AMAQI
24th Jul 2026401 AMAQI
24th Jul 2026282 AMAQI
24th Jul 2026373 AMAQI
24th Jul 2026344 AMAQI
24th Jul 2026295 AMAQI
24th Jul 2026256 AMAQI

10°C8/11°C

24th Jul 2026447 AMAQI
24th Jul 2026688 AMAQI
24th Jul 2026669 AMAQI
24th Jul 20266010 AMAQI
24th Jul 20267911 AMAQI
24th Jul 20268012 PMAQI
24th Jul 2026541 PMAQI
24th Jul 2026502 PMAQI
24th Jul 2026463 PMAQI
24th Jul 2026434 PMAQI
24th Jul 2026445 PMAQI
24th Jul 2026496 PMAQI
24th Jul 2026597 PMAQI
24th Jul 2026748 PMAQI
24th Jul 2026959 PMAQI
24th Jul 202610210 PMAQI
24th Jul 20269811 PMAQI
25th Jul 202610812 AMAQI
25th Jul 20261061 AMAQI
25th Jul 2026742 AMAQI
25th Jul 2026683 AMAQI
25th Jul 2026754 AMAQI
25th Jul 2026525 AMAQI
25th Jul 2026486 AMAQI

10°C7/14°C

25th Jul 2026287 AMAQI
25th Jul 2026308 AMAQI
25th Jul 2026229 AMAQI
25th Jul 20261410 AMAQI
25th Jul 20261611 AMAQI
25th Jul 20261612 PMAQI
25th Jul 2026231 PMAQI
25th Jul 2026282 PMAQI
25th Jul 2026243 PMAQI
25th Jul 2026234 PMAQI
25th Jul 2026305 PMAQI
25th Jul 2026406 PMAQI
25th Jul 2026387 PMAQI
25th Jul 2026388 PMAQI
25th Jul 2026559 PMAQI
25th Jul 20266410 PMAQI
25th Jul 20265011 PMAQI
26th Jul 20263412 AMAQI
26th Jul 2026461 AMAQI
26th Jul 2026562 AMAQI
26th Jul 2026473 AMAQI
26th Jul 2026204 AMAQI
26th Jul 2026185 AMAQI
26th Jul 2026206 AMAQI

12°C10/14°C

26th Jul 2026317 AMAQI
26th Jul 2026248 AMAQI
26th Jul 2026199 AMAQI
26th Jul 20261710 AMAQI
26th Jul 20262211 AMAQI
26th Jul 20262212 PMAQI
26th Jul 2026201 PMAQI
26th Jul 2026222 PMAQI
26th Jul 2026223 PMAQI
26th Jul 2026194 PMAQI
26th Jul 2026215 PMAQI
26th Jul 2026216 PMAQI
26th Jul 2026237 PMAQI
26th Jul 2026188 PMAQI
26th Jul 2026229 PMAQI
26th Jul 20262810 PMAQI
26th Jul 20262911 PMAQI
27th Jul 20263812 AMAQI
27th Jul 2026451 AMAQI
27th Jul 2026422 AMAQI
27th Jul 2026273 AMAQI
27th Jul 2026244 AMAQI
27th Jul 2026275 AMAQI
27th Jul 2026266 AMAQI

13°C12/14°C

27th Jul 2026247 AMAQI
27th Jul 2026258 AMAQI
27th Jul 2026339 AMAQI
27th Jul 20262910 AMAQI
27th Jul 20262611 AMAQI
27th Jul 20262612 PMAQI
27th Jul 2026291 PMAQI
27th Jul 2026252 PMAQI
27th Jul 2026233 PMAQI
27th Jul 2026324 PMAQI
27th Jul 2026445 PMAQI
27th Jul 2026256 PMAQI
27th Jul 2026277 PMAQI
27th Jul 2026298 PMAQI
27th Jul 2026379 PMAQI
27th Jul 20263510 PMAQI
27th Jul 20262911 PMAQI
28th Jul 20263212 AMAQI
28th Jul 2026251 AMAQI
28th Jul 2026232 AMAQI
28th Jul 2026233 AMAQI
28th Jul 2026254 AMAQI
28th Jul 2026235 AMAQI
28th Jul 2026236 AMAQI

12°C10/14°C

28th Jul 2026197 AMAQI
7 AM
28th Jul 2026228 AMAQI
28th Jul 2026249 AMAQI
28th Jul 20262910 AMAQI
28th Jul 20262611 AMAQI
28th Jul 20262712 PMAQI
12 PM
28th Jul 2026261 PMAQI
28th Jul 2026242 PMAQI
28th Jul 2026263 PMAQI
28th Jul 2026274 PMAQI
28th Jul 2026255 PMAQI
5 PM
28th Jul 2026256 PMAQI
28th Jul 2026257 PMAQI
28th Jul 2026418 PMAQI
28th Jul 2026649 PMAQI
28th Jul 20266210 PMAQI
28th Jul 20266011 PMAQI
12 AM
6 AM

10°C8/11°C

Day time
Avg. Highest Time
12 PM - 1 PM

64AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
7 AM - 10 AM

55AQI

4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 PM to 1 PM (Avg. 64), while the lowest AQI was between 7 AM to 10 AM (Avg. 55).
Night time
Avg. Highest Time
12 AM - 1 AM

89AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
6 AM - 6 PM

58AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 1 AM (Avg. 89), while the lowest AQI was between 6 AM to 6 PM (Avg. 58).

2026 Days Vs Air Quality

Chillan, Biobio, Chile

2026

70%

144

24%

49

6%

13

Total number of days with different AQI categories in last 210 days in 2026 (155 days remaining)

Good
144 Days
Moderate
49 Days
Poor
13 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 70%

Health Risk Level:

Low

In 2026, 70% of 210 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.

Annual Air Quality Insights

Chillan, Biobio, Chile

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
23AQI (US)
2nd January 2026
26AQI (US)
3rd January 2026
30AQI (US)
4th January 2026
34AQI (US)
5th January 2026
24AQI (US)
6th January 2026
24AQI (US)
7th January 2026
28AQI (US)
8th January 2026
42AQI (US)
9th January 2026
32AQI (US)
10th January 2026
28AQI (US)
11th January 2026
20AQI (US)
12th January 2026
21AQI (US)
13th January 2026
17AQI (US)
14th January 2026
50AQI (US)
15th January 2026
53AQI (US)
16th January 2026
22AQI (US)
17th January 2026
30AQI (US)
18th January 2026
33AQI (US)
19th January 2026
90AQI (US)
20th January 2026
146AQI (US)
21st January 2026
100AQI (US)
22nd January 2026
52AQI (US)
23rd January 2026
56AQI (US)
24th January 2026
46AQI (US)
25th January 2026
48AQI (US)
26th January 2026
45AQI (US)
27th January 2026
39AQI (US)
28th January 2026
42AQI (US)
29th January 2026
43AQI (US)
30th January 2026
51AQI (US)
31st January 2026
42AQI (US)
1st February 2026
44AQI (US)
2nd February 2026
54AQI (US)
3rd February 2026
50AQI (US)
4th February 2026
49AQI (US)
5th February 2026
47AQI (US)
6th February 2026
44AQI (US)
7th February 2026
42AQI (US)
8th February 2026
45AQI (US)
9th February 2026
46AQI (US)
10th February 2026
42AQI (US)
11th February 2026
42AQI (US)
12th February 2026
42AQI (US)
13th February 2026
49AQI (US)
14th February 2026
50AQI (US)
15th February 2026
42AQI (US)
16th February 2026
46AQI (US)
17th February 2026
46AQI (US)
18th February 2026
46AQI (US)
19th February 2026
50AQI (US)
20th February 2026
42AQI (US)
21st February 2026
38AQI (US)
22nd February 2026
34AQI (US)
23rd February 2026
39AQI (US)
24th February 2026
43AQI (US)
25th February 2026
44AQI (US)
26th February 2026
32AQI (US)
27th February 2026
34AQI (US)
28th February 2026
34AQI (US)
1st March 2026
38AQI (US)
2nd March 2026
50AQI (US)
3rd March 2026
44AQI (US)
4th March 2026
41AQI (US)
5th March 2026
38AQI (US)
6th March 2026
29AQI (US)
7th March 2026
32AQI (US)
8th March 2026
36AQI (US)
9th March 2026
37AQI (US)
10th March 2026
31AQI (US)
11th March 2026
35AQI (US)
12th March 2026
40AQI (US)
13th March 2026
39AQI (US)
14th March 2026
36AQI (US)
15th March 2026
30AQI (US)
16th March 2026
36AQI (US)
17th March 2026
35AQI (US)
18th March 2026
32AQI (US)
19th March 2026
32AQI (US)
20th March 2026
34AQI (US)
21st March 2026
32AQI (US)
22nd March 2026
33AQI (US)
23rd March 2026
38AQI (US)
24th March 2026
35AQI (US)
25th March 2026
32AQI (US)
26th March 2026
30AQI (US)
27th March 2026
32AQI (US)
28th March 2026
32AQI (US)
29th March 2026
28AQI (US)
30th March 2026
28AQI (US)
31st March 2026
28AQI (US)
1st April 2026
29AQI (US)
2nd April 2026
32AQI (US)
3rd April 2026
29AQI (US)
4th April 2026
28AQI (US)
5th April 2026
30AQI (US)
6th April 2026
36AQI (US)
7th April 2026
30AQI (US)
8th April 2026
37AQI (US)
9th April 2026
30AQI (US)
10th April 2026
35AQI (US)
11th April 2026
36AQI (US)
12th April 2026
31AQI (US)
13th April 2026
29AQI (US)
14th April 2026
32AQI (US)
15th April 2026
30AQI (US)
16th April 2026
32AQI (US)
17th April 2026
18th April 2026
32AQI (US)
19th April 2026
34AQI (US)
20th April 2026
33AQI (US)
21st April 2026
27AQI (US)
22nd April 2026
23rd April 2026
24AQI (US)
24th April 2026
27AQI (US)
25th April 2026
30AQI (US)
26th April 2026
34AQI (US)
27th April 2026
28AQI (US)
28th April 2026
28AQI (US)
29th April 2026
26AQI (US)
30th April 2026
26AQI (US)
1st May 2026
28AQI (US)
2nd May 2026
26AQI (US)
3rd May 2026
26AQI (US)
4th May 2026
30AQI (US)
5th May 2026
34AQI (US)
6th May 2026
34AQI (US)
7th May 2026
30AQI (US)
8th May 2026
28AQI (US)
9th May 2026
10th May 2026
32AQI (US)
11th May 2026
34AQI (US)
12th May 2026
36AQI (US)
13th May 2026
36AQI (US)
14th May 2026
30AQI (US)
15th May 2026
52AQI (US)
16th May 2026
54AQI (US)
17th May 2026
42AQI (US)
18th May 2026
40AQI (US)
19th May 2026
53AQI (US)
20th May 2026
56AQI (US)
21st May 2026
48AQI (US)
22nd May 2026
53AQI (US)
23rd May 2026
58AQI (US)
24th May 2026
58AQI (US)
25th May 2026
72AQI (US)
26th May 2026
108AQI (US)
27th May 2026
95AQI (US)
28th May 2026
72AQI (US)
29th May 2026
74AQI (US)
30th May 2026
97AQI (US)
31st May 2026
86AQI (US)
1st June 2026
63AQI (US)
2nd June 2026
91AQI (US)
3rd June 2026
66AQI (US)
4th June 2026
64AQI (US)
5th June 2026
90AQI (US)
6th June 2026
119AQI (US)
7th June 2026
82AQI (US)
8th June 2026
67AQI (US)
9th June 2026
68AQI (US)
10th June 2026
46AQI (US)
11th June 2026
73AQI (US)
12th June 2026
74AQI (US)
13th June 2026
66AQI (US)
14th June 2026
50AQI (US)
15th June 2026
82AQI (US)
16th June 2026
111AQI (US)
17th June 2026
110AQI (US)
18th June 2026
87AQI (US)
19th June 2026
110AQI (US)
20th June 2026
51AQI (US)
21st June 2026
48AQI (US)
22nd June 2026
73AQI (US)
23rd June 2026
48AQI (US)
24th June 2026
79AQI (US)
25th June 2026
76AQI (US)
26th June 2026
81AQI (US)
27th June 2026
59AQI (US)
28th June 2026
62AQI (US)
29th June 2026
50AQI (US)
30th June 2026
52AQI (US)
1st July 2026
75AQI (US)
2nd July 2026
109AQI (US)
3rd July 2026
138AQI (US)
4th July 2026
142AQI (US)
5th July 2026
128AQI (US)
6th July 2026
140AQI (US)
7th July 2026
138AQI (US)
8th July 2026
103AQI (US)
9th July 2026
77AQI (US)
10th July 2026
38AQI (US)
11th July 2026
49AQI (US)
12th July 2026
87AQI (US)
13th July 2026
82AQI (US)
14th July 2026
58AQI (US)
15th July 2026
32AQI (US)
16th July 2026
34AQI (US)
17th July 2026
46AQI (US)
18th July 2026
33AQI (US)
19th July 2026
43AQI (US)
20th July 2026
62AQI (US)
21st July 2026
52AQI (US)
22nd July 2026
24AQI (US)
23rd July 2026
32AQI (US)
24th July 2026
56AQI (US)
25th July 2026
45AQI (US)
26th July 2026
26AQI (US)
27th July 2026
30AQI (US)
28th July 2026
30AQI (US)
29th July 2026
30th July 2026
31st July 2026
1st August 2026
2nd August 2026
3rd August 2026
4th August 2026
5th August 2026
6th August 2026
7th August 2026
8th August 2026
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

43AQI (US)

43AQI (US)

35AQI (US)

31AQI (US)

51AQI (US)

73AQI (US)

68AQI (US)

No. of days

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

202649AQI (US)

24
6
1
27
1
31
28
16
13
1
5
21
4
13
8
7
144
49
13

Highest AQI (US) recorded in

June

73AQI (US)

Lowest AQI (US) recorded in

April

31AQI (US)

202556AQI (US)

30
1
21
7
26
5
12
15
3
1
23
7
2
11
14
3
2
17
8
4
7
22
2
21
9
25
5
1
28
2
31
206
117
35
7

Highest AQI (US) recorded in

June

107AQI (US)

Lowest AQI (US) recorded in

December

28AQI (US)

202459AQI (US)

26
5
23
3
23
4
11
17
2
1
11
10
9
12
10
7
1
3
13
10
4
1
7
17
7
18
10
2
29
2
30
31
214
92
38
14
1

Highest AQI (US) recorded in

May

118AQI (US)

Lowest AQI (US) recorded in

November

27AQI (US)

202361AQI (US)

31
11
6
5
3
3
23
8
12
12
5
1
6
16
7
2
8
12
3
7
5
14
9
3
11
12
7
1
18
12
19
4
26
1
31
201
97
36
17
3

Highest AQI (US) recorded in

February

93AQI (US)

Lowest AQI (US) recorded in

January

27AQI (US)

202256AQI (US)

30
10
9
1
1
24
7
13
14
3
4
14
9
4
4
14
10
2
4
12
5
2
3
13
13
3
27
4
30
31
190
90
31
9

Highest AQI (US) recorded in

May

100AQI (US)

Lowest AQI (US) recorded in

December

26AQI (US)

202169AQI (US)

29
1
27
1
18
12
1
10
17
3
1
8
10
12
13
8
7
2
11
11
9
2
14
8
7
8
22
26
5
30
25
6
176
110
41
35
2

Highest AQI (US) recorded in

May

125AQI (US)

Lowest AQI (US) recorded in

January

32AQI (US)

202061AQI (US)

12
1
9
11
1
10
7
1
4
12
9
5
4
11
11
4
1
9
15
7
15
14
1
28
3
30
30
1
141
78
36
10
1

Highest AQI (US) recorded in

July

106AQI (US)

Lowest AQI (US) recorded in

December

27AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2021(Avg.)
69AQI (US)
Least Polluted Year Recorded
2026(Avg.)
49AQI (US)

Chillan's annual 2026 AQI (US) (49) shows an average percentage change of -18.3% (improved AQI (US)) compared to previous years: 2020 (61), 2021 (69), 2022 (56), 2023 (61), 2024 (59), 2025 (56).