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+

August Air Quality Analysis

Chillan, Biobio, Chile

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
12th Aug 2021
175AQI
Lowest AQI recorded on
20th Aug 2023
23AQI

Same Day Analysis (1st August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks the most lowest AQI at 30 of Good air quality, showing improvement over 2024, 2023, 2022 and 2021 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 1st Aug - 2nd Aug 2025

Chillan, Biobio, Chile

AQI
Day
Night
.

7 AM1st Aug 2025

5 PM

6 AM2nd Aug 2025

Day time
Avg. Highest Time
11AM1st Aug

49AQI

Avg. Lowest Time
8AM1st Aug

19AQI

Night time
Avg. Highest Time
3AM2nd Aug

55AQI

Avg. Lowest Time
5AM2nd Aug

27AQI

In the last 24 hours,

Chillan's AQI reached its highest point of 55 at 3 AM during the Night, while the lowest point, 19, was recorded at 8 AM during the Day between 1st Aug and 2nd Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Chillan, Biobio, Chile

JulAug
03rd - 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 - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd
Day
Night
3rd Jul 20251947 AMAQI
3rd Jul 20251718 AMAQI
3rd Jul 20251579 AMAQI
3rd Jul 202516710 AMAQI
3rd Jul 202517611 AMAQI
3rd Jul 202516212 PMAQI
3rd Jul 20251571 PMAQI
3rd Jul 20251582 PMAQI
3rd Jul 20251533 PMAQI
3rd Jul 20251524 PMAQI
3rd Jul 20251565 PMAQI
3rd Jul 20251386 PMAQI
3rd Jul 20251477 PMAQI
3rd Jul 20251628 PMAQI
3rd Jul 20251669 PMAQI
3rd Jul 202517610 PMAQI
3rd Jul 202516611 PMAQI
4th Jul 202517012 AMAQI
4th Jul 20251691 AMAQI
4th Jul 20251632 AMAQI
4th Jul 20251633 AMAQI
4th Jul 20251744 AMAQI
4th Jul 20251625 AMAQI
4th Jul 20251696 AMAQI

9°C5/16°C

4th Jul 20251547 AMAQI
4th Jul 20251298 AMAQI
4th Jul 20251469 AMAQI
4th Jul 202515510 AMAQI
4th Jul 202515011 AMAQI
4th Jul 202514712 PMAQI
4th Jul 20251181 PMAQI
4th Jul 20251342 PMAQI
4th Jul 20251323 PMAQI
4th Jul 20251474 PMAQI
4th Jul 20251475 PMAQI
4th Jul 20251466 PMAQI
4th Jul 20251567 PMAQI
4th Jul 20251688 PMAQI
4th Jul 20251659 PMAQI
4th Jul 202517010 PMAQI
4th Jul 202516211 PMAQI
5th Jul 202516212 AMAQI
5th Jul 20251841 AMAQI
5th Jul 20251852 AMAQI
5th Jul 20251623 AMAQI
5th Jul 20251684 AMAQI
5th Jul 20251275 AMAQI
5th Jul 2025906 AMAQI

9°C5/16°C

5th Jul 20251187 AMAQI
5th Jul 20251358 AMAQI
5th Jul 20251419 AMAQI
5th Jul 202514210 AMAQI
5th Jul 202513811 AMAQI
5th Jul 202512012 PMAQI
5th Jul 20251161 PMAQI
5th Jul 20251082 PMAQI
5th Jul 20251363 PMAQI
5th Jul 20251424 PMAQI
5th Jul 20251505 PMAQI
5th Jul 20251426 PMAQI
5th Jul 20251287 PMAQI
5th Jul 20251418 PMAQI
5th Jul 20251519 PMAQI
5th Jul 202513810 PMAQI
5th Jul 202513811 PMAQI
6th Jul 202514212 AMAQI
6th Jul 2025821 AMAQI
6th Jul 2025502 AMAQI
6th Jul 2025433 AMAQI
6th Jul 2025384 AMAQI
6th Jul 2025415 AMAQI
6th Jul 2025356 AMAQI

10°C6/13°C

6th Jul 2025427 AMAQI
6th Jul 2025508 AMAQI
6th Jul 2025499 AMAQI
6th Jul 20255010 AMAQI
6th Jul 20255011 AMAQI
6th Jul 20255412 PMAQI
6th Jul 2025541 PMAQI
6th Jul 2025542 PMAQI
6th Jul 2025573 PMAQI
6th Jul 2025584 PMAQI
6th Jul 2025565 PMAQI
6th Jul 2025576 PMAQI
6th Jul 2025587 PMAQI
6th Jul 2025608 PMAQI
6th Jul 2025609 PMAQI
6th Jul 20255810 PMAQI
6th Jul 20255911 PMAQI
7th Jul 20256112 AMAQI
7th Jul 2025531 AMAQI
7th Jul 2025372 AMAQI
7th Jul 2025353 AMAQI
7th Jul 2025494 AMAQI
7th Jul 2025375 AMAQI
7th Jul 2025486 AMAQI

12°C11/14°C

7th Jul 2025577 AMAQI
7th Jul 2025588 AMAQI
7th Jul 2025799 AMAQI
7th Jul 20257610 AMAQI
7th Jul 20258211 AMAQI
7th Jul 20256112 PMAQI
7th Jul 2025491 PMAQI
7th Jul 2025442 PMAQI
7th Jul 2025503 PMAQI
7th Jul 2025524 PMAQI
7th Jul 2025525 PMAQI
7th Jul 2025546 PMAQI
7th Jul 2025607 PMAQI
7th Jul 2025608 PMAQI
7th Jul 2025629 PMAQI
7th Jul 20256410 PMAQI
7th Jul 20257211 PMAQI
8th Jul 20256312 AMAQI
8th Jul 2025671 AMAQI
8th Jul 2025502 AMAQI
8th Jul 2025513 AMAQI
8th Jul 2025564 AMAQI
8th Jul 2025485 AMAQI
8th Jul 2025476 AMAQI

12°C8/17°C

8th Jul 2025507 AMAQI
8th Jul 2025538 AMAQI
8th Jul 2025509 AMAQI
8th Jul 20254510 AMAQI
8th Jul 20254311 AMAQI
8th Jul 20255012 PMAQI
8th Jul 2025441 PMAQI
8th Jul 2025482 PMAQI
8th Jul 2025463 PMAQI
8th Jul 2025534 PMAQI
8th Jul 2025535 PMAQI
8th Jul 2025546 PMAQI
8th Jul 2025587 PMAQI
8th Jul 2025598 PMAQI
8th Jul 2025569 PMAQI
8th Jul 20255510 PMAQI
8th Jul 20255611 PMAQI
9th Jul 20255512 AMAQI
9th Jul 2025671 AMAQI
9th Jul 2025702 AMAQI
9th Jul 2025513 AMAQI
9th Jul 2025544 AMAQI
9th Jul 2025465 AMAQI
9th Jul 2025516 AMAQI

9°C6/14°C

9th Jul 2025477 AMAQI
9th Jul 2025568 AMAQI
9th Jul 2025589 AMAQI
9th Jul 20256610 AMAQI
9th Jul 20256211 AMAQI
9th Jul 20256012 PMAQI
9th Jul 2025621 PMAQI
9th Jul 2025612 PMAQI
9th Jul 2025543 PMAQI
9th Jul 2025574 PMAQI
9th Jul 2025595 PMAQI
9th Jul 2025596 PMAQI
9th Jul 2025607 PMAQI
9th Jul 2025628 PMAQI
9th Jul 2025749 PMAQI
9th Jul 20257210 PMAQI
9th Jul 20256211 PMAQI
10th Jul 20256012 AMAQI
10th Jul 20251491 AMAQI
10th Jul 20251272 AMAQI
10th Jul 20251153 AMAQI
10th Jul 2025844 AMAQI
10th Jul 2025795 AMAQI
10th Jul 2025676 AMAQI

6°C3/13°C

10th Jul 2025757 AMAQI
10th Jul 2025828 AMAQI
10th Jul 2025799 AMAQI
10th Jul 20258910 AMAQI
10th Jul 20259211 AMAQI
10th Jul 20257912 PMAQI
10th Jul 2025831 PMAQI
10th Jul 2025822 PMAQI
10th Jul 2025993 PMAQI
10th Jul 2025924 PMAQI
10th Jul 2025895 PMAQI
10th Jul 2025836 PMAQI
10th Jul 2025887 PMAQI
10th Jul 2025928 PMAQI
10th Jul 2025999 PMAQI
10th Jul 20259910 PMAQI
10th Jul 202510411 PMAQI
11th Jul 202510712 AMAQI
11th Jul 20251431 AMAQI
11th Jul 20251242 AMAQI
11th Jul 20251273 AMAQI
11th Jul 20251044 AMAQI
11th Jul 2025815 AMAQI
11th Jul 2025706 AMAQI

6°C2/13°C

11th Jul 2025757 AMAQI
11th Jul 2025848 AMAQI
11th Jul 2025819 AMAQI
11th Jul 202510110 AMAQI
11th Jul 20258911 AMAQI
11th Jul 20259512 PMAQI
11th Jul 20251001 PMAQI
11th Jul 2025872 PMAQI
11th Jul 2025893 PMAQI
11th Jul 20251014 PMAQI
11th Jul 2025915 PMAQI
11th Jul 20251006 PMAQI
11th Jul 2025987 PMAQI
11th Jul 20251128 PMAQI
11th Jul 20251329 PMAQI
11th Jul 202513810 PMAQI
11th Jul 202511511 PMAQI
12th Jul 202512412 AMAQI
12th Jul 20251321 AMAQI
12th Jul 20251372 AMAQI
12th Jul 2025793 AMAQI
12th Jul 2025524 AMAQI
12th Jul 2025445 AMAQI
12th Jul 2025546 AMAQI

8°C3/15°C

12th Jul 2025567 AMAQI
12th Jul 2025668 AMAQI
12th Jul 2025629 AMAQI
12th Jul 20256410 AMAQI
12th Jul 20256411 AMAQI
12th Jul 20257112 PMAQI
12th Jul 2025701 PMAQI
12th Jul 2025642 PMAQI
12th Jul 2025753 PMAQI
12th Jul 2025844 PMAQI
12th Jul 2025775 PMAQI
12th Jul 2025746 PMAQI
12th Jul 2025807 PMAQI
12th Jul 2025908 PMAQI
12th Jul 20251019 PMAQI
12th Jul 202510210 PMAQI
12th Jul 202511511 PMAQI
13th Jul 20259412 AMAQI
13th Jul 2025891 AMAQI
13th Jul 2025762 AMAQI
13th Jul 2025633 AMAQI
13th Jul 2025544 AMAQI
13th Jul 2025455 AMAQI
13th Jul 2025346 AMAQI

8°C4/16°C

13th Jul 2025487 AMAQI
13th Jul 2025568 AMAQI
13th Jul 2025569 AMAQI
13th Jul 20255710 AMAQI
13th Jul 20255811 AMAQI
13th Jul 20255812 PMAQI
13th Jul 2025611 PMAQI
13th Jul 2025612 PMAQI
13th Jul 2025623 PMAQI
13th Jul 2025644 PMAQI
13th Jul 2025675 PMAQI
13th Jul 2025696 PMAQI
13th Jul 2025677 PMAQI
13th Jul 2025668 PMAQI
13th Jul 2025679 PMAQI
13th Jul 20257210 PMAQI
13th Jul 20256611 PMAQI
14th Jul 20256512 AMAQI
14th Jul 2025651 AMAQI
14th Jul 2025692 AMAQI
14th Jul 2025533 AMAQI
14th Jul 2025534 AMAQI
14th Jul 2025515 AMAQI
14th Jul 2025526 AMAQI

8°C3/14°C

14th Jul 2025547 AMAQI
14th Jul 2025588 AMAQI
14th Jul 2025599 AMAQI
14th Jul 20256410 AMAQI
14th Jul 20256611 AMAQI
14th Jul 20256412 PMAQI
14th Jul 2025621 PMAQI
14th Jul 2025702 PMAQI
14th Jul 2025603 PMAQI
14th Jul 2025634 PMAQI
14th Jul 2025605 PMAQI
14th Jul 2025626 PMAQI
14th Jul 2025607 PMAQI
14th Jul 2025688 PMAQI
14th Jul 2025619 PMAQI
14th Jul 20257210 PMAQI
14th Jul 20257311 PMAQI
15th Jul 20256412 AMAQI
15th Jul 2025721 AMAQI
15th Jul 2025702 AMAQI
15th Jul 2025623 AMAQI
15th Jul 2025524 AMAQI
15th Jul 2025585 AMAQI
15th Jul 2025536 AMAQI

8°C5/12°C

15th Jul 2025547 AMAQI
15th Jul 2025598 AMAQI
15th Jul 2025599 AMAQI
15th Jul 20256510 AMAQI
15th Jul 20255811 AMAQI
15th Jul 20255812 PMAQI
15th Jul 2025561 PMAQI
15th Jul 2025542 PMAQI
15th Jul 2025553 PMAQI
15th Jul 2025424 PMAQI
15th Jul 2025505 PMAQI
15th Jul 2025616 PMAQI
15th Jul 2025647 PMAQI
15th Jul 2025818 PMAQI
15th Jul 2025649 PMAQI
15th Jul 20256910 PMAQI
15th Jul 20256911 PMAQI
16th Jul 20256212 AMAQI
16th Jul 20251571 AMAQI
16th Jul 20251612 AMAQI
16th Jul 20251393 AMAQI
16th Jul 20251424 AMAQI
16th Jul 2025965 AMAQI
16th Jul 2025756 AMAQI

7°C4/11°C

16th Jul 2025827 AMAQI
16th Jul 2025918 AMAQI
16th Jul 2025929 AMAQI
16th Jul 20259210 AMAQI
16th Jul 20259311 AMAQI
16th Jul 20258312 PMAQI
16th Jul 2025831 PMAQI
16th Jul 2025862 PMAQI
16th Jul 2025713 PMAQI
16th Jul 2025354 PMAQI
16th Jul 2025475 PMAQI
16th Jul 2025936 PMAQI
16th Jul 20251017 PMAQI
16th Jul 20251058 PMAQI
16th Jul 2025989 PMAQI
16th Jul 202510410 PMAQI
16th Jul 202510611 PMAQI
17th Jul 202511112 AMAQI
17th Jul 20251041 AMAQI
17th Jul 20251012 AMAQI
17th Jul 2025783 AMAQI
17th Jul 2025854 AMAQI
17th Jul 2025565 AMAQI
17th Jul 2025536 AMAQI

6°C1/13°C

17th Jul 2025627 AMAQI
17th Jul 2025688 AMAQI
17th Jul 2025699 AMAQI
17th Jul 20257410 AMAQI
17th Jul 20257311 AMAQI
17th Jul 20256812 PMAQI
17th Jul 2025681 PMAQI
17th Jul 2025642 PMAQI
17th Jul 2025743 PMAQI
17th Jul 2025504 PMAQI
17th Jul 2025525 PMAQI
17th Jul 2025746 PMAQI
17th Jul 2025757 PMAQI
17th Jul 2025768 PMAQI
17th Jul 2025829 PMAQI
17th Jul 20258410 PMAQI
17th Jul 20259111 PMAQI
18th Jul 20258212 AMAQI
18th Jul 2025971 AMAQI
18th Jul 2025972 AMAQI
18th Jul 20251423 AMAQI
18th Jul 2025854 AMAQI
18th Jul 20251035 AMAQI
18th Jul 20251146 AMAQI

8°C4/16°C

18th Jul 2025847 AMAQI
18th Jul 2025868 AMAQI
18th Jul 2025889 AMAQI
18th Jul 202510310 AMAQI
18th Jul 20259411 AMAQI
18th Jul 20258512 PMAQI
18th Jul 2025851 PMAQI
18th Jul 2025802 PMAQI
18th Jul 2025763 PMAQI
18th Jul 2025634 PMAQI
18th Jul 2025705 PMAQI
18th Jul 2025916 PMAQI
18th Jul 2025877 PMAQI
18th Jul 20251008 PMAQI
18th Jul 20251269 PMAQI
18th Jul 202512810 PMAQI
18th Jul 202510011 PMAQI
19th Jul 20258612 AMAQI
19th Jul 2025731 AMAQI
19th Jul 20251382 AMAQI
19th Jul 20251623 AMAQI
19th Jul 20251494 AMAQI
19th Jul 20251005 AMAQI
19th Jul 2025906 AMAQI

9°C4/16°C

19th Jul 2025847 AMAQI
19th Jul 2025688 AMAQI
19th Jul 2025869 AMAQI
19th Jul 20258710 AMAQI
19th Jul 20259211 AMAQI
19th Jul 20259812 PMAQI
19th Jul 2025841 PMAQI
19th Jul 2025782 PMAQI
19th Jul 2025923 PMAQI
19th Jul 2025744 PMAQI
19th Jul 2025675 PMAQI
19th Jul 2025896 PMAQI
19th Jul 20251037 PMAQI
19th Jul 20251158 PMAQI
19th Jul 20251189 PMAQI
19th Jul 202510610 PMAQI
19th Jul 202510611 PMAQI
20th Jul 202510012 AMAQI
20th Jul 20251611 AMAQI
20th Jul 20251712 AMAQI
20th Jul 20251253 AMAQI
20th Jul 2025974 AMAQI
20th Jul 20251045 AMAQI
20th Jul 20251106 AMAQI

10°C6/16°C

20th Jul 20251007 AMAQI
20th Jul 20251228 AMAQI
20th Jul 20251049 AMAQI
20th Jul 202511110 AMAQI
20th Jul 202514511 AMAQI
20th Jul 202514212 PMAQI
20th Jul 2025891 PMAQI
20th Jul 2025982 PMAQI
20th Jul 2025883 PMAQI
20th Jul 2025824 PMAQI
20th Jul 2025745 PMAQI
20th Jul 20251076 PMAQI
20th Jul 20251167 PMAQI
20th Jul 20251248 PMAQI
20th Jul 20251389 PMAQI
20th Jul 202512710 PMAQI
20th Jul 202515911 PMAQI
21st Jul 202512612 AMAQI
21st Jul 20251481 AMAQI
21st Jul 20251362 AMAQI
21st Jul 20251243 AMAQI
21st Jul 20251064 AMAQI
21st Jul 20251395 AMAQI
21st Jul 2025796 AMAQI

10°C8/15°C

21st Jul 2025847 AMAQI
21st Jul 20251038 AMAQI
21st Jul 20251029 AMAQI
21st Jul 20259110 AMAQI
21st Jul 20259311 AMAQI
21st Jul 202511812 PMAQI
21st Jul 20251011 PMAQI
21st Jul 2025872 PMAQI
21st Jul 2025793 PMAQI
21st Jul 2025584 PMAQI
21st Jul 2025705 PMAQI
21st Jul 20251106 PMAQI
21st Jul 20251027 PMAQI
21st Jul 20251108 PMAQI
21st Jul 20251029 PMAQI
21st Jul 202512510 PMAQI
21st Jul 202510811 PMAQI
22nd Jul 202511212 AMAQI
22nd Jul 2025961 AMAQI
22nd Jul 20251022 AMAQI
22nd Jul 2025783 AMAQI
22nd Jul 2025514 AMAQI
22nd Jul 2025435 AMAQI
22nd Jul 2025426 AMAQI

10°C7/15°C

22nd Jul 2025487 AMAQI
22nd Jul 2025548 AMAQI
22nd Jul 2025639 AMAQI
22nd Jul 20256410 AMAQI
22nd Jul 20255911 AMAQI
22nd Jul 20255912 PMAQI
22nd Jul 2025611 PMAQI
22nd Jul 2025582 PMAQI
22nd Jul 2025543 PMAQI
22nd Jul 2025684 PMAQI
22nd Jul 2025555 PMAQI
22nd Jul 2025686 PMAQI
22nd Jul 2025717 PMAQI
22nd Jul 2025688 PMAQI
22nd Jul 2025889 PMAQI
22nd Jul 20257810 PMAQI
22nd Jul 20257511 PMAQI
23rd Jul 20257212 AMAQI
23rd Jul 20251521 AMAQI
23rd Jul 20251282 AMAQI
23rd Jul 2025843 AMAQI
23rd Jul 20251264 AMAQI
23rd Jul 2025825 AMAQI
23rd Jul 2025706 AMAQI

10°C6/15°C

23rd Jul 2025787 AMAQI
23rd Jul 2025928 AMAQI
23rd Jul 2025929 AMAQI
23rd Jul 202512310 AMAQI
23rd Jul 20259111 AMAQI
23rd Jul 202511912 PMAQI
23rd Jul 20251361 PMAQI
23rd Jul 2025912 PMAQI
23rd Jul 2025863 PMAQI
23rd Jul 2025744 PMAQI
23rd Jul 2025785 PMAQI
23rd Jul 20251016 PMAQI
23rd Jul 20251067 PMAQI
23rd Jul 20251348 PMAQI
23rd Jul 20251499 PMAQI
23rd Jul 202511610 PMAQI
23rd Jul 202513611 PMAQI
24th Jul 202510412 AMAQI
24th Jul 20251141 AMAQI
24th Jul 20251112 AMAQI
24th Jul 20251913 AMAQI
24th Jul 20251014 AMAQI
24th Jul 20251105 AMAQI
24th Jul 2025856 AMAQI

10°C6/16°C

24th Jul 20251007 AMAQI
24th Jul 20251118 AMAQI
24th Jul 20251089 AMAQI
24th Jul 202510510 AMAQI
24th Jul 202510211 AMAQI
24th Jul 202510212 PMAQI
24th Jul 2025961 PMAQI
24th Jul 20251012 PMAQI
24th Jul 2025803 PMAQI
24th Jul 2025624 PMAQI
24th Jul 2025705 PMAQI
24th Jul 20251046 PMAQI
24th Jul 20251147 PMAQI
24th Jul 20251038 PMAQI
24th Jul 20251049 PMAQI
24th Jul 202510410 PMAQI
24th Jul 202510711 PMAQI
25th Jul 202510312 AMAQI
25th Jul 2025571 AMAQI
25th Jul 2025452 AMAQI
25th Jul 2025253 AMAQI
25th Jul 2025294 AMAQI
25th Jul 2025255 AMAQI
25th Jul 2025206 AMAQI

9°C6/12°C

25th Jul 2025257 AMAQI
25th Jul 2025338 AMAQI
25th Jul 2025349 AMAQI
25th Jul 20253410 AMAQI
25th Jul 20253711 AMAQI
25th Jul 20254212 PMAQI
25th Jul 2025401 PMAQI
25th Jul 2025392 PMAQI
25th Jul 2025393 PMAQI
25th Jul 2025424 PMAQI
25th Jul 2025465 PMAQI
25th Jul 2025476 PMAQI
25th Jul 2025497 PMAQI
25th Jul 2025538 PMAQI
25th Jul 2025529 PMAQI
25th Jul 20255910 PMAQI
25th Jul 20257411 PMAQI
26th Jul 202510912 AMAQI
26th Jul 2025821 AMAQI
26th Jul 2025962 AMAQI
26th Jul 20251433 AMAQI
26th Jul 20251384 AMAQI
26th Jul 20251635 AMAQI
26th Jul 20251236 AMAQI

11°C9/14°C

26th Jul 20251537 AMAQI
26th Jul 20251428 AMAQI
26th Jul 20251189 AMAQI
26th Jul 202513110 AMAQI
26th Jul 202512411 AMAQI
26th Jul 202511312 PMAQI
26th Jul 20251071 PMAQI
26th Jul 20251212 PMAQI
26th Jul 2025803 PMAQI
26th Jul 2025574 PMAQI
26th Jul 2025825 PMAQI
26th Jul 20251146 PMAQI
26th Jul 20251147 PMAQI
26th Jul 20251168 PMAQI
26th Jul 20251189 PMAQI
26th Jul 202512810 PMAQI
26th Jul 202512911 PMAQI
27th Jul 202512412 AMAQI
27th Jul 20251261 AMAQI
27th Jul 20251062 AMAQI
27th Jul 2025893 AMAQI
27th Jul 2025844 AMAQI
27th Jul 2025745 AMAQI
27th Jul 2025706 AMAQI

10°C8/13°C

27th Jul 2025737 AMAQI
27th Jul 2025878 AMAQI
27th Jul 2025759 AMAQI
27th Jul 20257910 AMAQI
27th Jul 20258011 AMAQI
27th Jul 20257412 PMAQI
27th Jul 2025701 PMAQI
27th Jul 2025682 PMAQI
27th Jul 2025673 PMAQI
27th Jul 2025634 PMAQI
27th Jul 2025745 PMAQI
27th Jul 2025836 PMAQI
27th Jul 2025807 PMAQI
27th Jul 2025828 PMAQI
27th Jul 2025859 PMAQI
27th Jul 20257810 PMAQI
27th Jul 20258011 PMAQI
28th Jul 20258012 AMAQI
28th Jul 2025571 AMAQI
28th Jul 2025622 AMAQI
28th Jul 2025383 AMAQI
28th Jul 2025464 AMAQI
28th Jul 2025485 AMAQI
28th Jul 2025336 AMAQI

10°C9/12°C

28th Jul 2025417 AMAQI
28th Jul 2025398 AMAQI
28th Jul 2025429 AMAQI
28th Jul 20255210 AMAQI
28th Jul 20255611 AMAQI
28th Jul 20256312 PMAQI
28th Jul 2025601 PMAQI
28th Jul 2025512 PMAQI
28th Jul 2025503 PMAQI
28th Jul 2025554 PMAQI
28th Jul 2025535 PMAQI
28th Jul 2025536 PMAQI
28th Jul 2025627 PMAQI
28th Jul 2025588 PMAQI
28th Jul 2025639 PMAQI
28th Jul 20258010 PMAQI
28th Jul 20257211 PMAQI
29th Jul 20258012 AMAQI
29th Jul 20251311 AMAQI
29th Jul 20251562 AMAQI
29th Jul 20251223 AMAQI
29th Jul 20251314 AMAQI
29th Jul 20251025 AMAQI
29th Jul 2025776 AMAQI

13°C10/17°C

29th Jul 20251067 AMAQI
29th Jul 20251038 AMAQI
29th Jul 20251169 AMAQI
29th Jul 202511510 AMAQI
29th Jul 202510911 AMAQI
29th Jul 202510612 PMAQI
29th Jul 2025871 PMAQI
29th Jul 2025842 PMAQI
29th Jul 2025903 PMAQI
29th Jul 20251044 PMAQI
29th Jul 20251065 PMAQI
29th Jul 2025836 PMAQI
29th Jul 20251007 PMAQI
29th Jul 20251078 PMAQI
29th Jul 20251409 PMAQI
29th Jul 202514210 PMAQI
29th Jul 202510311 PMAQI
30th Jul 202511112 AMAQI
30th Jul 2025961 AMAQI
30th Jul 2025792 AMAQI
30th Jul 2025643 AMAQI
30th Jul 2025514 AMAQI
30th Jul 2025485 AMAQI
30th Jul 2025456 AMAQI

14°C11/18°C

30th Jul 2025507 AMAQI
30th Jul 2025568 AMAQI
30th Jul 2025569 AMAQI
30th Jul 20255410 AMAQI
30th Jul 20255511 AMAQI
30th Jul 20255912 PMAQI
30th Jul 2025591 PMAQI
30th Jul 2025562 PMAQI
30th Jul 2025563 PMAQI
30th Jul 2025564 PMAQI
30th Jul 2025565 PMAQI
30th Jul 2025566 PMAQI
30th Jul 2025567 PMAQI
30th Jul 2025568 PMAQI
30th Jul 2025569 PMAQI
30th Jul 20255810 PMAQI
30th Jul 20256111 PMAQI
31st Jul 20255912 AMAQI
31st Jul 2025381 AMAQI
31st Jul 2025242 AMAQI
31st Jul 2025213 AMAQI
31st Jul 2025204 AMAQI
31st Jul 2025165 AMAQI
31st Jul 2025146 AMAQI

13°C12/15°C

31st Jul 2025257 AMAQI
31st Jul 2025558 AMAQI
31st Jul 2025509 AMAQI
31st Jul 20255110 AMAQI
31st Jul 20255811 AMAQI
31st Jul 20254612 PMAQI
31st Jul 2025541 PMAQI
31st Jul 2025532 PMAQI
31st Jul 2025523 PMAQI
31st Jul 2025534 PMAQI
31st Jul 2025535 PMAQI
31st Jul 2025516 PMAQI
31st Jul 2025457 PMAQI
31st Jul 2025538 PMAQI
31st Jul 2025569 PMAQI
31st Jul 20256410 PMAQI
31st Jul 20255411 PMAQI
1st Aug 20254212 AMAQI
1st Aug 2025271 AMAQI
1st Aug 2025222 AMAQI
1st Aug 2025253 AMAQI
1st Aug 2025314 AMAQI
1st Aug 2025175 AMAQI
1st Aug 2025376 AMAQI

12°C11/13°C

1st Aug 2025277 AMAQI
1st Aug 2025198 AMAQI
1st Aug 2025229 AMAQI
1st Aug 20252310 AMAQI
1st Aug 20254911 AMAQI
1st Aug 20253012 PMAQI
1st Aug 2025461 PMAQI
1st Aug 2025292 PMAQI
1st Aug 2025313 PMAQI
1st Aug 2025314 PMAQI
1st Aug 2025365 PMAQI
1st Aug 2025376 PMAQI
1st Aug 2025327 PMAQI
1st Aug 2025318 PMAQI
1st Aug 2025339 PMAQI
1st Aug 20253310 PMAQI
1st Aug 20253411 PMAQI
2nd Aug 20253012 AMAQI
2nd Aug 2025491 AMAQI
2nd Aug 2025412 AMAQI
2nd Aug 2025553 AMAQI
2nd Aug 2025464 AMAQI
2nd Aug 2025275 AMAQI
2nd Aug 2025306 AMAQI

10°C9/12°C

2nd Aug 2025267 AMAQI
7 AM
2nd Aug 2025348 AMAQI
2nd Aug 2025279 AMAQI
2nd Aug 20255310 AMAQI
2nd Aug 20253611 AMAQI
2nd Aug 20254012 PMAQI
12 PM
2nd Aug 2025321 PMAQI
2nd Aug 2025402 PMAQI
2nd Aug 2025433 PMAQI
2nd Aug 2025434 PMAQI
2nd Aug 2025435 PMAQI
5 PM
2nd Aug 2025446 PMAQI
12 AM
6 AM

--°C/°C

Day time
Avg. Highest Time
10 AM - 5 PM

77AQI

8 hours / Day
240 hours / Month
Avg. Lowest Time
1 PM - 5 PM

73AQI

5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 10 AM to 5 PM (Avg. 77), while the lowest AQI was between 1 PM to 5 PM (Avg. 73).
Night time
Avg. Highest Time
1 AM - 2 AM

102AQI

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

69AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 AM to 2 AM (Avg. 102), while the lowest AQI was between 6 AM to 6 AM (Avg. 69).

2025 Days Vs Air Quality

Chillan, Biobio, Chile

2025

45%

95

37%

79

15%

32

3%

7

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

Good
95 Days
Moderate
79 Days
Poor
32 Days
Unhealthy
7 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 45%

Health Risk Level:

Significant

In 2025, 45% of 214 days were within WHO’s safe air quality limits, and 55% exceeded them. The risk of health issues is Significant, especially for those with existing respiratory or heart conditions.

Annual Air Quality Insights

Chillan, Biobio, Chile

AQI levels in 2025

AQI
PM2.5
PM10
CO
SO2
NO2
O3
Sun.Mon.Tue.Wed.Thu.Fri.Sat.

Jan.

Feb.

Mar.

Apr.

May

Jun.

Jul.

Aug.

Sep.

Oct.

Nov.

Dec.

1st January 2025
30AQI
2nd January 2025
30AQI
3rd January 2025
37AQI
4th January 2025
36AQI
5th January 2025
31AQI
6th January 2025
42AQI
7th January 2025
32AQI
8th January 2025
31AQI
9th January 2025
25AQI
10th January 2025
34AQI
11th January 2025
31AQI
12th January 2025
57AQI
13th January 2025
34AQI
14th January 2025
31AQI
15th January 2025
21AQI
16th January 2025
23AQI
17th January 2025
25AQI
18th January 2025
26AQI
19th January 2025
27AQI
20th January 2025
32AQI
21st January 2025
25AQI
22nd January 2025
28AQI
23rd January 2025
24AQI
24th January 2025
28AQI
25th January 2025
28AQI
26th January 2025
31AQI
27th January 2025
25AQI
28th January 2025
33AQI
29th January 2025
44AQI
30th January 2025
45AQI
31st January 2025
30AQI
1st February 2025
27AQI
2nd February 2025
24AQI
3rd February 2025
27AQI
4th February 2025
37AQI
5th February 2025
25AQI
6th February 2025
34AQI
7th February 2025
63AQI
8th February 2025
59AQI
9th February 2025
56AQI
10th February 2025
65AQI
11th February 2025
68AQI
12th February 2025
51AQI
13th February 2025
48AQI
14th February 2025
31AQI
15th February 2025
31AQI
16th February 2025
32AQI
17th February 2025
30AQI
18th February 2025
42AQI
19th February 2025
46AQI
20th February 2025
42AQI
21st February 2025
47AQI
22nd February 2025
28AQI
23rd February 2025
30AQI
24th February 2025
22AQI
25th February 2025
41AQI
26th February 2025
90AQI
27th February 2025
46AQI
28th February 2025
24AQI
1st March 2025
21AQI
2nd March 2025
20AQI
3rd March 2025
22AQI
4th March 2025
29AQI
5th March 2025
28AQI
6th March 2025
25AQI
7th March 2025
22AQI
8th March 2025
22AQI
9th March 2025
23AQI
10th March 2025
23AQI
11th March 2025
39AQI
12th March 2025
53AQI
13th March 2025
36AQI
14th March 2025
33AQI
15th March 2025
35AQI
16th March 2025
41AQI
17th March 2025
34AQI
18th March 2025
27AQI
19th March 2025
38AQI
20th March 2025
31AQI
21st March 2025
25AQI
22nd March 2025
49AQI
23rd March 2025
65AQI
24th March 2025
45AQI
25th March 2025
53AQI
26th March 2025
60AQI
27th March 2025
54AQI
28th March 2025
45AQI
29th March 2025
41AQI
30th March 2025
22AQI
31st March 2025
26AQI
1st April 2025
31AQI
2nd April 2025
47AQI
3rd April 2025
46AQI
4th April 2025
53AQI
5th April 2025
50AQI
6th April 2025
42AQI
7th April 2025
58AQI
8th April 2025
107AQI
9th April 2025
59AQI
10th April 2025
40AQI
11th April 2025
41AQI
12th April 2025
39AQI
13th April 2025
53AQI
14th April 2025
60AQI
15th April 2025
74AQI
16th April 2025
68AQI
17th April 2025
50AQI
18th April 2025
42AQI
19th April 2025
64AQI
20th April 2025
82AQI
21st April 2025
101AQI
22nd April 2025
103AQI
23rd April 2025
64AQI
24th April 2025
44AQI
25th April 2025
37AQI
26th April 2025
70AQI
27th April 2025
63AQI
28th April 2025
54AQI
29th April 2025
76AQI
30th April 2025
89AQI
1st May 2025
63AQI
2nd May 2025
86AQI
3rd May 2025
103AQI
4th May 2025
54AQI
5th May 2025
85AQI
6th May 2025
101AQI
7th May 2025
79AQI
8th May 2025
62AQI
9th May 2025
58AQI
10th May 2025
66AQI
11th May 2025
64AQI
12th May 2025
92AQI
13th May 2025
120AQI
14th May 2025
107AQI
15th May 2025
113AQI
16th May 2025
104AQI
17th May 2025
53AQI
18th May 2025
87AQI
19th May 2025
94AQI
20th May 2025
80AQI
21st May 2025
93AQI
22nd May 2025
88AQI
23rd May 2025
146AQI
24th May 2025
96AQI
25th May 2025
74AQI
26th May 2025
47AQI
27th May 2025
74AQI
28th May 2025
64AQI
29th May 2025
86AQI
30th May 2025
72AQI
31st May 2025
67AQI
1st June 2025
93AQI
2nd June 2025
149AQI
3rd June 2025
151AQI
4th June 2025
155AQI
5th June 2025
105AQI
6th June 2025
111AQI
7th June 2025
100AQI
8th June 2025
121AQI
9th June 2025
135AQI
10th June 2025
171AQI
11th June 2025
133AQI
12th June 2025
52AQI
13th June 2025
65AQI
14th June 2025
58AQI
15th June 2025
38AQI
16th June 2025
38AQI
17th June 2025
69AQI
18th June 2025
102AQI
19th June 2025
95AQI
20th June 2025
111AQI
21st June 2025
81AQI
22nd June 2025
80AQI
23rd June 2025
86AQI
24th June 2025
117AQI
25th June 2025
96AQI
26th June 2025
127AQI
27th June 2025
143AQI
28th June 2025
132AQI
29th June 2025
150AQI
30th June 2025
131AQI
1st July 2025
156AQI
2nd July 2025
161AQI
3rd July 2025
165AQI
4th July 2025
156AQI
5th July 2025
141AQI
6th July 2025
56AQI
7th July 2025
56AQI
8th July 2025
53AQI
9th July 2025
60AQI
10th July 2025
92AQI
11th July 2025
104AQI
12th July 2025
82AQI
13th July 2025
63AQI
14th July 2025
62AQI
15th July 2025
61AQI
16th July 2025
99AQI
17th July 2025
76AQI
18th July 2025
97AQI
19th July 2025
100AQI
20th July 2025
118AQI
21st July 2025
107AQI
22nd July 2025
68AQI
23rd July 2025
107AQI
24th July 2025
105AQI
25th July 2025
44AQI
26th July 2025
118AQI
27th July 2025
83AQI
28th July 2025
55AQI
29th July 2025
109AQI
30th July 2025
61AQI
31st July 2025
43AQI
1st August 2025
30AQI

31AQI

42AQI

35AQI

60AQI

83AQI

107AQI

92AQI

30AQI

No. of days

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

202564AQI

30
1
21
7
26
5
12
15
3
1
23
7
2
11
14
3
2
17
8
4
1
95
79
32
7

Highest AQI recorded in

June

107AQI

Lowest AQI recorded in

August

30AQI

202459AQI

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
28
3
30
31
213
93
38
14
1

Highest AQI recorded in

May

118AQI

Lowest AQI recorded in

November

27AQI

202361AQI

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
11
8
1
18
12
19
4
26
1
31
201
96
37
17
3

Highest AQI recorded in

July

94AQI

Lowest AQI recorded in

January

27AQI

202256AQI

31
10
9
1
1
24
7
13
14
3
2
16
9
4
4
14
10
2
4
12
5
2
3
13
13
3
27
4
30
31
189
92
31
9

Highest AQI recorded in

May

100AQI

Lowest AQI recorded in

December

26AQI

202169AQI

29
1
27
1
18
12
1
10
17
3
1
8
10
12
13
7
8
2
11
11
9
2
14
8
7
8
21
1
26
5
30
25
6
176
109
41
36
2

Highest AQI recorded in

May

125AQI

Lowest AQI recorded in

January

32AQI

202061AQI

12
1
8
12
1
10
7
1
4
12
9
5
4
11
11
4
1
9
15
7
15
14
1
28
3
30
30
1
140
79
36
10
1

Highest AQI recorded in

July

106AQI

Lowest AQI recorded in

December

27AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2021(Avg.)
69AQI
Least Polluted Year Recorded
2022(Avg.)
56AQI

Chillan's annual 2025 AQI (64) shows an average percentage change of 5.6% (worsened AQI) compared to previous years: 2020 (61), 2021 (69), 2022 (56), 2023 (61), 2024 (59).