Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Cerro Merquan, Coronel, 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

Cerro Merquan, Coronel, Biobio, Chile

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
12th Aug 2021
138AQI
Lowest AQI recorded on
18th Aug 2023
22AQI

Same Day Analysis (3rd August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 74 of Moderate air quality, showing improvement over 2023 and 2021 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

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

Cerro Merquan, Coronel, Biobio, Chile

AQI
Day
Night
.

8 AM2nd Aug 2025

5 PM

7 AM3rd Aug 2025

Day time
Avg. Highest Time
7AM3rd Aug

66AQI

Avg. Lowest Time
9AM2nd Aug

28AQI

Night time
Avg. Highest Time
2AM3rd Aug

118AQI

Avg. Lowest Time
11PM2nd Aug

46AQI

In the last 24 hours,

Cerro Merquan's AQI reached its highest point of 118 at 2 AM during the Night, while the lowest point, 28, was recorded at 9 AM during the Day between 2nd Aug and 3rd Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Cerro Merquan, Coronel, Biobio, Chile

JulAug
04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd
Day
Night
4th Jul 20251268 AMAQI
4th Jul 20251229 AMAQI
4th Jul 202515110 AMAQI
4th Jul 202513411 AMAQI
4th Jul 202516012 PMAQI
4th Jul 20251481 PMAQI
4th Jul 20251172 PMAQI
4th Jul 20251273 PMAQI
4th Jul 20251434 PMAQI
4th Jul 20251485 PMAQI
4th Jul 20251486 PMAQI
4th Jul 20251527 PMAQI
4th Jul 20251628 PMAQI
4th Jul 20251829 PMAQI
4th Jul 202516010 PMAQI
4th Jul 202516911 PMAQI
5th Jul 202516812 AMAQI
5th Jul 20251361 AMAQI
5th Jul 20251442 AMAQI
5th Jul 20251023 AMAQI
5th Jul 2025884 AMAQI
5th Jul 2025855 AMAQI
5th Jul 2025706 AMAQI
5th Jul 2025807 AMAQI

11°C8/15°C

5th Jul 2025838 AMAQI
5th Jul 2025839 AMAQI
5th Jul 20258410 AMAQI
5th Jul 20258311 AMAQI
5th Jul 20257912 PMAQI
5th Jul 2025851 PMAQI
5th Jul 2025742 PMAQI
5th Jul 2025883 PMAQI
5th Jul 2025924 PMAQI
5th Jul 20251005 PMAQI
5th Jul 2025966 PMAQI
5th Jul 2025947 PMAQI
5th Jul 2025958 PMAQI
5th Jul 20251009 PMAQI
5th Jul 20258710 PMAQI
5th Jul 20259211 PMAQI
6th Jul 20258912 AMAQI
6th Jul 2025671 AMAQI
6th Jul 2025332 AMAQI
6th Jul 2025263 AMAQI
6th Jul 2025324 AMAQI
6th Jul 2025225 AMAQI
6th Jul 2025216 AMAQI
6th Jul 2025277 AMAQI

11°C8/13°C

6th Jul 2025328 AMAQI
6th Jul 2025279 AMAQI
6th Jul 20253210 AMAQI
6th Jul 20253411 AMAQI
6th Jul 20254012 PMAQI
6th Jul 2025421 PMAQI
6th Jul 2025472 PMAQI
6th Jul 2025523 PMAQI
6th Jul 2025524 PMAQI
6th Jul 2025465 PMAQI
6th Jul 2025496 PMAQI
6th Jul 2025477 PMAQI
6th Jul 2025568 PMAQI
6th Jul 2025529 PMAQI
6th Jul 20255410 PMAQI
6th Jul 20256011 PMAQI
7th Jul 20255812 AMAQI
7th Jul 2025741 AMAQI
7th Jul 2025522 AMAQI
7th Jul 2025563 AMAQI
7th Jul 2025484 AMAQI
7th Jul 2025505 AMAQI
7th Jul 2025396 AMAQI
7th Jul 2025537 AMAQI

12°C11/12°C

7th Jul 2025528 AMAQI
7th Jul 2025549 AMAQI
7th Jul 20256310 AMAQI
7th Jul 20255911 AMAQI
7th Jul 20255112 PMAQI
7th Jul 2025611 PMAQI
7th Jul 2025622 PMAQI
7th Jul 2025583 PMAQI
7th Jul 2025564 PMAQI
7th Jul 2025545 PMAQI
7th Jul 2025546 PMAQI
7th Jul 2025607 PMAQI
7th Jul 2025568 PMAQI
7th Jul 2025619 PMAQI
7th Jul 20257310 PMAQI
7th Jul 20257511 PMAQI
8th Jul 20257212 AMAQI
8th Jul 2025741 AMAQI
8th Jul 2025582 AMAQI
8th Jul 2025803 AMAQI
8th Jul 2025674 AMAQI
8th Jul 2025625 AMAQI
8th Jul 2025446 AMAQI
8th Jul 2025567 AMAQI

12°C10/14°C

8th Jul 2025568 AMAQI
8th Jul 2025599 AMAQI
8th Jul 20255810 AMAQI
8th Jul 20255911 AMAQI
8th Jul 20257112 PMAQI
8th Jul 2025711 PMAQI
8th Jul 2025652 PMAQI
8th Jul 2025623 PMAQI
8th Jul 2025624 PMAQI
8th Jul 2025625 PMAQI
8th Jul 2025626 PMAQI
8th Jul 2025627 PMAQI
8th Jul 2025658 PMAQI
8th Jul 2025739 PMAQI
8th Jul 20256810 PMAQI
8th Jul 20257911 PMAQI
9th Jul 20258612 AMAQI
9th Jul 2025991 AMAQI
9th Jul 20251152 AMAQI
9th Jul 20251263 AMAQI
9th Jul 2025814 AMAQI
9th Jul 2025765 AMAQI
9th Jul 2025786 AMAQI
9th Jul 2025687 AMAQI

10°C7/14°C

9th Jul 2025688 AMAQI
9th Jul 2025749 AMAQI
9th Jul 20256910 AMAQI
9th Jul 20259011 AMAQI
9th Jul 20258012 PMAQI
9th Jul 2025861 PMAQI
9th Jul 2025782 PMAQI
9th Jul 2025813 PMAQI
9th Jul 2025804 PMAQI
9th Jul 2025745 PMAQI
9th Jul 2025766 PMAQI
9th Jul 2025727 PMAQI
9th Jul 2025948 PMAQI
9th Jul 20251049 PMAQI
9th Jul 202510810 PMAQI
9th Jul 202512511 PMAQI
10th Jul 202515412 AMAQI
10th Jul 20251611 AMAQI
10th Jul 20251162 AMAQI
10th Jul 20251403 AMAQI
10th Jul 2025964 AMAQI
10th Jul 2025785 AMAQI
10th Jul 2025676 AMAQI
10th Jul 2025767 AMAQI

8°C5/12°C

10th Jul 2025848 AMAQI
10th Jul 2025869 AMAQI
10th Jul 20259410 AMAQI
10th Jul 202510411 AMAQI
10th Jul 202511012 PMAQI
10th Jul 20251461 PMAQI
10th Jul 20251272 PMAQI
10th Jul 20251143 PMAQI
10th Jul 20251024 PMAQI
10th Jul 2025925 PMAQI
10th Jul 2025906 PMAQI
10th Jul 2025907 PMAQI
10th Jul 20251008 PMAQI
10th Jul 20251049 PMAQI
10th Jul 202511110 PMAQI
10th Jul 202512611 PMAQI
11th Jul 202513912 AMAQI
11th Jul 20251441 AMAQI
11th Jul 20251082 AMAQI
11th Jul 2025923 AMAQI
11th Jul 2025834 AMAQI
11th Jul 2025725 AMAQI
11th Jul 2025866 AMAQI
11th Jul 2025767 AMAQI

8°C4/13°C

11th Jul 2025788 AMAQI
11th Jul 2025869 AMAQI
11th Jul 20258910 AMAQI
11th Jul 202511611 AMAQI
11th Jul 202514612 PMAQI
11th Jul 2025991 PMAQI
11th Jul 2025842 PMAQI
11th Jul 2025823 PMAQI
11th Jul 2025884 PMAQI
11th Jul 2025795 PMAQI
11th Jul 2025856 PMAQI
11th Jul 2025837 PMAQI
11th Jul 2025948 PMAQI
11th Jul 2025969 PMAQI
11th Jul 202510010 PMAQI
11th Jul 202510811 PMAQI
12th Jul 202511712 AMAQI
12th Jul 20251121 AMAQI
12th Jul 2025942 AMAQI
12th Jul 2025743 AMAQI
12th Jul 2025604 AMAQI
12th Jul 2025605 AMAQI
12th Jul 2025546 AMAQI
12th Jul 2025547 AMAQI

9°C6/15°C

12th Jul 2025678 AMAQI
12th Jul 2025629 AMAQI
12th Jul 20256410 AMAQI
12th Jul 20256711 AMAQI
12th Jul 20256712 PMAQI
12th Jul 2025711 PMAQI
12th Jul 2025682 PMAQI
12th Jul 2025663 PMAQI
12th Jul 2025684 PMAQI
12th Jul 2025685 PMAQI
12th Jul 2025706 PMAQI
12th Jul 2025707 PMAQI
12th Jul 2025798 PMAQI
12th Jul 2025869 PMAQI
12th Jul 20259210 PMAQI
12th Jul 20259911 PMAQI
13th Jul 20259612 AMAQI
13th Jul 2025841 AMAQI
13th Jul 2025792 AMAQI
13th Jul 2025793 AMAQI
13th Jul 2025754 AMAQI
13th Jul 2025635 AMAQI
13th Jul 2025516 AMAQI
13th Jul 2025567 AMAQI

9°C6/14°C

13th Jul 2025578 AMAQI
13th Jul 2025569 AMAQI
13th Jul 20255810 AMAQI
13th Jul 20256311 AMAQI
13th Jul 20257012 PMAQI
13th Jul 2025631 PMAQI
13th Jul 2025562 PMAQI
13th Jul 2025593 PMAQI
13th Jul 2025614 PMAQI
13th Jul 2025635 PMAQI
13th Jul 2025656 PMAQI
13th Jul 2025757 PMAQI
13th Jul 2025878 PMAQI
13th Jul 2025809 PMAQI
13th Jul 20259410 PMAQI
13th Jul 20258611 PMAQI
14th Jul 20257912 AMAQI
14th Jul 2025621 AMAQI
14th Jul 2025652 AMAQI
14th Jul 2025573 AMAQI
14th Jul 2025594 AMAQI
14th Jul 2025545 AMAQI
14th Jul 2025546 AMAQI
14th Jul 2025537 AMAQI

9°C6/13°C

14th Jul 2025568 AMAQI
14th Jul 2025609 AMAQI
14th Jul 20256110 AMAQI
14th Jul 20256211 AMAQI
14th Jul 20256412 PMAQI
14th Jul 2025611 PMAQI
14th Jul 2025642 PMAQI
14th Jul 2025663 PMAQI
14th Jul 2025664 PMAQI
14th Jul 2025685 PMAQI
14th Jul 2025726 PMAQI
14th Jul 2025847 PMAQI
14th Jul 2025778 PMAQI
14th Jul 2025889 PMAQI
14th Jul 20258610 PMAQI
14th Jul 20258011 PMAQI
15th Jul 20256812 AMAQI
15th Jul 2025631 AMAQI
15th Jul 2025582 AMAQI
15th Jul 2025373 AMAQI
15th Jul 2025344 AMAQI
15th Jul 2025265 AMAQI
15th Jul 2025286 AMAQI
15th Jul 2025327 AMAQI

9°C7/11°C

15th Jul 2025348 AMAQI
15th Jul 2025429 AMAQI
15th Jul 20254410 AMAQI
15th Jul 20254911 AMAQI
15th Jul 20255012 PMAQI
15th Jul 2025491 PMAQI
15th Jul 2025462 PMAQI
15th Jul 2025503 PMAQI
15th Jul 2025564 PMAQI
15th Jul 2025505 PMAQI
15th Jul 2025476 PMAQI
15th Jul 2025547 PMAQI
15th Jul 2025658 PMAQI
15th Jul 2025749 PMAQI
15th Jul 20257610 PMAQI
15th Jul 20257211 PMAQI
16th Jul 20255512 AMAQI
16th Jul 20251321 AMAQI
16th Jul 20251552 AMAQI
16th Jul 20251583 AMAQI
16th Jul 20251304 AMAQI
16th Jul 2025935 AMAQI
16th Jul 20251226 AMAQI
16th Jul 20251007 AMAQI

9°C6/12°C

16th Jul 2025828 AMAQI
16th Jul 2025689 AMAQI
16th Jul 20258410 AMAQI
16th Jul 202510411 AMAQI
16th Jul 20259512 PMAQI
16th Jul 20251111 PMAQI
16th Jul 2025772 PMAQI
16th Jul 2025823 PMAQI
16th Jul 2025514 PMAQI
16th Jul 2025595 PMAQI
16th Jul 2025906 PMAQI
16th Jul 20251057 PMAQI
16th Jul 20251258 PMAQI
16th Jul 20251229 PMAQI
16th Jul 202513810 PMAQI
16th Jul 202514311 PMAQI
17th Jul 202511912 AMAQI
17th Jul 20251361 AMAQI
17th Jul 20251162 AMAQI
17th Jul 20251403 AMAQI
17th Jul 2025924 AMAQI
17th Jul 2025935 AMAQI
17th Jul 2025876 AMAQI
17th Jul 20251107 AMAQI

8°C4/13°C

17th Jul 2025918 AMAQI
17th Jul 2025809 AMAQI
17th Jul 202510010 AMAQI
17th Jul 202513711 AMAQI
17th Jul 202511612 PMAQI
17th Jul 2025981 PMAQI
17th Jul 20251062 PMAQI
17th Jul 2025773 PMAQI
17th Jul 2025674 PMAQI
17th Jul 2025725 PMAQI
17th Jul 2025866 PMAQI
17th Jul 2025827 PMAQI
17th Jul 2025928 PMAQI
17th Jul 20251039 PMAQI
17th Jul 202511810 PMAQI
17th Jul 202513311 PMAQI
18th Jul 202512512 AMAQI
18th Jul 2025951 AMAQI
18th Jul 2025932 AMAQI
18th Jul 20251223 AMAQI
18th Jul 20251124 AMAQI
18th Jul 20251065 AMAQI
18th Jul 2025736 AMAQI
18th Jul 2025577 AMAQI

10°C7/16°C

18th Jul 2025718 AMAQI
18th Jul 2025749 AMAQI
18th Jul 20257710 AMAQI
18th Jul 20256811 AMAQI
18th Jul 20259612 PMAQI
18th Jul 2025991 PMAQI
18th Jul 2025732 PMAQI
18th Jul 2025903 PMAQI
18th Jul 2025574 PMAQI
18th Jul 2025675 PMAQI
18th Jul 2025916 PMAQI
18th Jul 2025867 PMAQI
18th Jul 2025938 PMAQI
18th Jul 20251099 PMAQI
18th Jul 202511110 PMAQI
18th Jul 20259011 PMAQI
19th Jul 20258112 AMAQI
19th Jul 2025631 AMAQI
19th Jul 20251402 AMAQI
19th Jul 20251103 AMAQI
19th Jul 20251414 AMAQI
19th Jul 20251005 AMAQI
19th Jul 2025866 AMAQI
19th Jul 2025787 AMAQI

10°C7/15°C

19th Jul 20251038 AMAQI
19th Jul 20251169 AMAQI
19th Jul 202511510 AMAQI
19th Jul 20259111 AMAQI
19th Jul 20259412 PMAQI
19th Jul 2025921 PMAQI
19th Jul 2025802 PMAQI
19th Jul 2025883 PMAQI
19th Jul 2025754 PMAQI
19th Jul 2025805 PMAQI
19th Jul 2025846 PMAQI
19th Jul 2025827 PMAQI
19th Jul 20251178 PMAQI
19th Jul 20251169 PMAQI
19th Jul 202511110 PMAQI
19th Jul 202515311 PMAQI
20th Jul 202516012 AMAQI
20th Jul 20251701 AMAQI
20th Jul 20251662 AMAQI
20th Jul 20251313 AMAQI
20th Jul 20251044 AMAQI
20th Jul 2025975 AMAQI
20th Jul 2025896 AMAQI
20th Jul 2025977 AMAQI

11°C9/15°C

20th Jul 2025908 AMAQI
20th Jul 2025899 AMAQI
20th Jul 20258410 AMAQI
20th Jul 20258511 AMAQI
20th Jul 20259112 PMAQI
20th Jul 2025991 PMAQI
20th Jul 20251102 PMAQI
20th Jul 20251093 PMAQI
20th Jul 2025994 PMAQI
20th Jul 2025975 PMAQI
20th Jul 20251056 PMAQI
20th Jul 20251187 PMAQI
20th Jul 20251258 PMAQI
20th Jul 20251409 PMAQI
20th Jul 202513510 PMAQI
20th Jul 202515011 PMAQI
21st Jul 202513212 AMAQI
21st Jul 20251521 AMAQI
21st Jul 20251462 AMAQI
21st Jul 20251283 AMAQI
21st Jul 20251074 AMAQI
21st Jul 2025935 AMAQI
21st Jul 2025736 AMAQI
21st Jul 2025797 AMAQI

11°C9/15°C

21st Jul 2025848 AMAQI
21st Jul 2025909 AMAQI
21st Jul 20258910 AMAQI
21st Jul 20258311 AMAQI
21st Jul 202510212 PMAQI
21st Jul 2025821 PMAQI
21st Jul 2025802 PMAQI
21st Jul 2025693 PMAQI
21st Jul 2025644 PMAQI
21st Jul 2025705 PMAQI
21st Jul 2025986 PMAQI
21st Jul 2025887 PMAQI
21st Jul 2025908 PMAQI
21st Jul 20251099 PMAQI
21st Jul 202510310 PMAQI
21st Jul 202510811 PMAQI
22nd Jul 20259412 AMAQI
22nd Jul 2025821 AMAQI
22nd Jul 2025672 AMAQI
22nd Jul 2025683 AMAQI
22nd Jul 2025444 AMAQI
22nd Jul 2025345 AMAQI
22nd Jul 2025546 AMAQI
22nd Jul 2025407 AMAQI

10°C8/12°C

22nd Jul 2025578 AMAQI
22nd Jul 2025609 AMAQI
22nd Jul 20256210 AMAQI
22nd Jul 20257711 AMAQI
22nd Jul 20257212 PMAQI
22nd Jul 2025701 PMAQI
22nd Jul 2025602 PMAQI
22nd Jul 2025603 PMAQI
22nd Jul 2025624 PMAQI
22nd Jul 2025585 PMAQI
22nd Jul 2025706 PMAQI
22nd Jul 2025717 PMAQI
22nd Jul 2025718 PMAQI
22nd Jul 2025809 PMAQI
22nd Jul 20257810 PMAQI
22nd Jul 20256811 PMAQI
23rd Jul 20256512 AMAQI
23rd Jul 20251171 AMAQI
23rd Jul 20251042 AMAQI
23rd Jul 20251603 AMAQI
23rd Jul 20251404 AMAQI
23rd Jul 2025875 AMAQI
23rd Jul 2025806 AMAQI
23rd Jul 2025857 AMAQI

10°C8/14°C

23rd Jul 2025888 AMAQI
23rd Jul 2025989 AMAQI
23rd Jul 202510510 AMAQI
23rd Jul 20259911 AMAQI
23rd Jul 202512412 PMAQI
23rd Jul 20251451 PMAQI
23rd Jul 2025942 PMAQI
23rd Jul 2025883 PMAQI
23rd Jul 2025744 PMAQI
23rd Jul 2025765 PMAQI
23rd Jul 20251006 PMAQI
23rd Jul 2025927 PMAQI
23rd Jul 20251048 PMAQI
23rd Jul 20251129 PMAQI
23rd Jul 202512710 PMAQI
23rd Jul 202511811 PMAQI
24th Jul 202512012 AMAQI
24th Jul 2025751 AMAQI
24th Jul 20251082 AMAQI
24th Jul 20251043 AMAQI
24th Jul 2025624 AMAQI
24th Jul 2025465 AMAQI
24th Jul 2025326 AMAQI
24th Jul 2025527 AMAQI

10°C8/14°C

24th Jul 2025628 AMAQI
24th Jul 2025669 AMAQI
24th Jul 20255810 AMAQI
24th Jul 20255911 AMAQI
24th Jul 20255812 PMAQI
24th Jul 2025761 PMAQI
24th Jul 2025852 PMAQI
24th Jul 2025703 PMAQI
24th Jul 2025614 PMAQI
24th Jul 2025495 PMAQI
24th Jul 2025626 PMAQI
24th Jul 2025687 PMAQI
24th Jul 2025738 PMAQI
24th Jul 2025709 PMAQI
24th Jul 20257710 PMAQI
24th Jul 20257111 PMAQI
25th Jul 20256712 AMAQI
25th Jul 2025411 AMAQI
25th Jul 2025352 AMAQI
25th Jul 2025263 AMAQI
25th Jul 2025164 AMAQI
25th Jul 2025165 AMAQI
25th Jul 2025186 AMAQI
25th Jul 2025187 AMAQI

9°C7/11°C

25th Jul 2025238 AMAQI
25th Jul 2025279 AMAQI
25th Jul 20253010 AMAQI
25th Jul 20252911 AMAQI
25th Jul 20252812 PMAQI
25th Jul 2025301 PMAQI
25th Jul 2025312 PMAQI
25th Jul 2025343 PMAQI
25th Jul 2025404 PMAQI
25th Jul 2025365 PMAQI
25th Jul 2025386 PMAQI
25th Jul 2025367 PMAQI
25th Jul 2025518 PMAQI
25th Jul 2025559 PMAQI
25th Jul 20256310 PMAQI
25th Jul 20257211 PMAQI
26th Jul 20256712 AMAQI
26th Jul 20251231 AMAQI
26th Jul 2025852 AMAQI
26th Jul 2025823 AMAQI
26th Jul 2025434 AMAQI
26th Jul 2025285 AMAQI
26th Jul 2025386 AMAQI
26th Jul 2025387 AMAQI

11°C9/13°C

26th Jul 2025508 AMAQI
26th Jul 2025539 AMAQI
26th Jul 20255410 AMAQI
26th Jul 20255411 AMAQI
26th Jul 20255712 PMAQI
26th Jul 2025551 PMAQI
26th Jul 2025612 PMAQI
26th Jul 2025713 PMAQI
26th Jul 2025744 PMAQI
26th Jul 2025675 PMAQI
26th Jul 2025666 PMAQI
26th Jul 2025607 PMAQI
26th Jul 2025688 PMAQI
26th Jul 2025749 PMAQI
26th Jul 20257810 PMAQI
26th Jul 20257011 PMAQI
27th Jul 20257612 AMAQI
27th Jul 2025721 AMAQI
27th Jul 2025602 AMAQI
27th Jul 2025503 AMAQI
27th Jul 2025374 AMAQI
27th Jul 2025375 AMAQI
27th Jul 2025426 AMAQI
27th Jul 2025407 AMAQI

10°C9/12°C

27th Jul 2025488 AMAQI
27th Jul 2025349 AMAQI
27th Jul 20253610 AMAQI
27th Jul 20253611 AMAQI
27th Jul 20253912 PMAQI
27th Jul 2025411 PMAQI
27th Jul 2025452 PMAQI
27th Jul 2025483 PMAQI
27th Jul 2025504 PMAQI
27th Jul 2025565 PMAQI
27th Jul 2025526 PMAQI
27th Jul 2025487 PMAQI
27th Jul 2025548 PMAQI
27th Jul 2025529 PMAQI
27th Jul 20255210 PMAQI
27th Jul 20255511 PMAQI
28th Jul 20255612 AMAQI
28th Jul 2025291 AMAQI
28th Jul 2025182 AMAQI
28th Jul 2025213 AMAQI
28th Jul 2025164 AMAQI
28th Jul 2025255 AMAQI
28th Jul 2025146 AMAQI
28th Jul 2025177 AMAQI

10°C9/11°C

28th Jul 2025188 AMAQI
28th Jul 2025199 AMAQI
28th Jul 20252010 AMAQI
28th Jul 20252811 AMAQI
28th Jul 20253112 PMAQI
28th Jul 2025291 PMAQI
28th Jul 2025352 PMAQI
28th Jul 2025363 PMAQI
28th Jul 2025384 PMAQI
28th Jul 2025345 PMAQI
28th Jul 2025406 PMAQI
28th Jul 2025437 PMAQI
28th Jul 2025508 PMAQI
28th Jul 2025629 PMAQI
28th Jul 20257210 PMAQI
28th Jul 20257211 PMAQI
29th Jul 20258912 AMAQI
29th Jul 20251161 AMAQI
29th Jul 2025962 AMAQI
29th Jul 2025723 AMAQI
29th Jul 2025514 AMAQI
29th Jul 2025505 AMAQI
29th Jul 2025336 AMAQI
29th Jul 2025597 AMAQI

11°C10/13°C

29th Jul 2025548 AMAQI
29th Jul 2025569 AMAQI
29th Jul 20257410 AMAQI
29th Jul 20257411 AMAQI
29th Jul 20256112 PMAQI
29th Jul 2025621 PMAQI
29th Jul 2025582 PMAQI
29th Jul 2025683 PMAQI
29th Jul 2025664 PMAQI
29th Jul 2025665 PMAQI
29th Jul 2025786 PMAQI
29th Jul 2025867 PMAQI
29th Jul 2025928 PMAQI
29th Jul 2025979 PMAQI
29th Jul 202510210 PMAQI
29th Jul 20256811 PMAQI
30th Jul 20257512 AMAQI
30th Jul 2025461 AMAQI
30th Jul 2025322 AMAQI
30th Jul 2025253 AMAQI
30th Jul 2025224 AMAQI
30th Jul 2025175 AMAQI
30th Jul 2025206 AMAQI
30th Jul 2025227 AMAQI

13°C11/15°C

30th Jul 2025238 AMAQI
30th Jul 2025269 AMAQI
30th Jul 20252510 AMAQI
30th Jul 20252211 AMAQI
30th Jul 20252612 PMAQI
30th Jul 2025311 PMAQI
30th Jul 2025382 PMAQI
30th Jul 2025393 PMAQI
30th Jul 2025424 PMAQI
30th Jul 2025425 PMAQI
30th Jul 2025426 PMAQI
30th Jul 2025427 PMAQI
30th Jul 2025428 PMAQI
30th Jul 2025429 PMAQI
30th Jul 20253810 PMAQI
30th Jul 20253611 PMAQI
31st Jul 20253512 AMAQI
31st Jul 2025241 AMAQI
31st Jul 2025172 AMAQI
31st Jul 2025143 AMAQI
31st Jul 2025154 AMAQI
31st Jul 2025145 AMAQI
31st Jul 2025126 AMAQI
31st Jul 2025237 AMAQI

12°C11/13°C

31st Jul 2025568 AMAQI
31st Jul 2025539 AMAQI
31st Jul 20255210 AMAQI
31st Jul 20256011 AMAQI
31st Jul 20254712 PMAQI
31st Jul 2025571 PMAQI
31st Jul 2025602 PMAQI
31st Jul 2025533 PMAQI
31st Jul 2025544 PMAQI
31st Jul 2025525 PMAQI
31st Jul 2025526 PMAQI
31st Jul 2025467 PMAQI
31st Jul 2025578 PMAQI
31st Jul 2025579 PMAQI
31st Jul 20256710 PMAQI
31st Jul 20255211 PMAQI
1st Aug 20255012 AMAQI
1st Aug 2025271 AMAQI
1st Aug 2025232 AMAQI
1st Aug 2025263 AMAQI
1st Aug 2025274 AMAQI
1st Aug 2025165 AMAQI
1st Aug 2025366 AMAQI
1st Aug 2025307 AMAQI

12°C11/13°C

1st Aug 2025228 AMAQI
1st Aug 2025209 AMAQI
1st Aug 20252410 AMAQI
1st Aug 20254311 AMAQI
1st Aug 20252412 PMAQI
1st Aug 2025311 PMAQI
1st Aug 2025252 PMAQI
1st Aug 2025293 PMAQI
1st Aug 2025294 PMAQI
1st Aug 2025355 PMAQI
1st Aug 2025386 PMAQI
1st Aug 2025327 PMAQI
1st Aug 2025318 PMAQI
1st Aug 2025329 PMAQI
1st Aug 20253210 PMAQI
1st Aug 20254011 PMAQI
2nd Aug 20253512 AMAQI
2nd Aug 2025521 AMAQI
2nd Aug 2025312 AMAQI
2nd Aug 2025603 AMAQI
2nd Aug 2025344 AMAQI
2nd Aug 2025295 AMAQI
2nd Aug 2025186 AMAQI
2nd Aug 2025297 AMAQI

11°C9/12°C

2nd Aug 2025298 AMAQI
2nd Aug 2025289 AMAQI
2nd Aug 20254310 AMAQI
2nd Aug 20254811 AMAQI
2nd Aug 20254612 PMAQI
2nd Aug 2025411 PMAQI
2nd Aug 2025442 PMAQI
2nd Aug 2025463 PMAQI
2nd Aug 2025464 PMAQI
2nd Aug 2025445 PMAQI
2nd Aug 2025456 PMAQI
2nd Aug 2025567 PMAQI
2nd Aug 2025478 PMAQI
2nd Aug 2025489 PMAQI
2nd Aug 20256010 PMAQI
2nd Aug 20254611 PMAQI
3rd Aug 20256812 AMAQI
3rd Aug 2025471 AMAQI
3rd Aug 20251182 AMAQI
3rd Aug 2025783 AMAQI
3rd Aug 2025804 AMAQI
3rd Aug 2025885 AMAQI
3rd Aug 2025696 AMAQI
3rd Aug 2025667 AMAQI

9°C6/11°C

3rd Aug 2025548 AMAQI
8 AM
3rd Aug 2025549 AMAQI
3rd Aug 20256210 AMAQI
3rd Aug 20256311 AMAQI
3rd Aug 20256112 PMAQI
12 PM
3rd Aug 2025631 PMAQI
3rd Aug 2025662 PMAQI
3rd Aug 2025683 PMAQI
3rd Aug 2025704 PMAQI
3rd Aug 2025705 PMAQI
5 PM
3rd Aug 2025696 PMAQI
12 AM
7 AM

--°C/°C

Day time
Avg. Highest Time
11 AM - 1 PM

72AQI

3 hours / Day
90 hours / Month
Avg. Lowest Time
8 AM - 9 AM

62AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 11 AM to 1 PM (Avg. 72), while the lowest AQI was between 8 AM to 9 AM (Avg. 62).
Night time
Avg. Highest Time
12 AM - 1 AM

92AQI

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

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. 92), while the lowest AQI was between 6 AM to 7 AM (Avg. 58).

2025 Days Vs Air Quality

Cerro Merquan, Coronel, Biobio, Chile

2025

49%

105

35%

76

15%

32

0.9%

2

Total number of days with different AQI categories in last 215 days in 2025 (150 days remaining)

Good
105 Days
Moderate
76 Days
Poor
32 Days
Unhealthy
2 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 49%

Health Risk Level:

Significant

In 2025, 49% of 215 days were within WHO’s safe air quality limits, and 51% exceeded them. The risk of health issues is Significant, especially for those with existing respiratory or heart conditions.

Annual Air Quality Insights

Cerro Merquan, Coronel, 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
43AQI
2nd January 2025
39AQI
3rd January 2025
46AQI
4th January 2025
38AQI
5th January 2025
47AQI
6th January 2025
45AQI
7th January 2025
31AQI
8th January 2025
32AQI
9th January 2025
34AQI
10th January 2025
43AQI
11th January 2025
39AQI
12th January 2025
28AQI
13th January 2025
36AQI
14th January 2025
42AQI
15th January 2025
24AQI
16th January 2025
22AQI
17th January 2025
26AQI
18th January 2025
29AQI
19th January 2025
32AQI
20th January 2025
31AQI
21st January 2025
27AQI
22nd January 2025
25AQI
23rd January 2025
28AQI
24th January 2025
33AQI
25th January 2025
31AQI
26th January 2025
31AQI
27th January 2025
28AQI
28th January 2025
48AQI
29th January 2025
46AQI
30th January 2025
28AQI
31st January 2025
33AQI
1st February 2025
38AQI
2nd February 2025
23AQI
3rd February 2025
30AQI
4th February 2025
42AQI
5th February 2025
27AQI
6th February 2025
33AQI
7th February 2025
93AQI
8th February 2025
47AQI
9th February 2025
50AQI
10th February 2025
40AQI
11th February 2025
59AQI
12th February 2025
51AQI
13th February 2025
47AQI
14th February 2025
41AQI
15th February 2025
46AQI
16th February 2025
35AQI
17th February 2025
39AQI
18th February 2025
52AQI
19th February 2025
47AQI
20th February 2025
29AQI
21st February 2025
32AQI
22nd February 2025
24AQI
23rd February 2025
21AQI
24th February 2025
29AQI
25th February 2025
44AQI
26th February 2025
39AQI
27th February 2025
32AQI
28th February 2025
25AQI
1st March 2025
26AQI
2nd March 2025
22AQI
3rd March 2025
21AQI
4th March 2025
28AQI
5th March 2025
29AQI
6th March 2025
23AQI
7th March 2025
18AQI
8th March 2025
30AQI
9th March 2025
34AQI
10th March 2025
33AQI
11th March 2025
46AQI
12th March 2025
54AQI
13th March 2025
48AQI
14th March 2025
50AQI
15th March 2025
48AQI
16th March 2025
48AQI
17th March 2025
44AQI
18th March 2025
46AQI
19th March 2025
53AQI
20th March 2025
42AQI
21st March 2025
27AQI
22nd March 2025
41AQI
23rd March 2025
53AQI
24th March 2025
77AQI
25th March 2025
78AQI
26th March 2025
131AQI
27th March 2025
68AQI
28th March 2025
39AQI
29th March 2025
29AQI
30th March 2025
31AQI
31st March 2025
39AQI
1st April 2025
39AQI
2nd April 2025
50AQI
3rd April 2025
57AQI
4th April 2025
74AQI
5th April 2025
54AQI
6th April 2025
45AQI
7th April 2025
72AQI
8th April 2025
73AQI
9th April 2025
46AQI
10th April 2025
28AQI
11th April 2025
46AQI
12th April 2025
45AQI
13th April 2025
56AQI
14th April 2025
38AQI
15th April 2025
49AQI
16th April 2025
45AQI
17th April 2025
58AQI
18th April 2025
69AQI
19th April 2025
81AQI
20th April 2025
87AQI
21st April 2025
54AQI
22nd April 2025
35AQI
23rd April 2025
59AQI
24th April 2025
36AQI
25th April 2025
47AQI
26th April 2025
71AQI
27th April 2025
77AQI
28th April 2025
72AQI
29th April 2025
75AQI
30th April 2025
81AQI
1st May 2025
42AQI
2nd May 2025
91AQI
3rd May 2025
80AQI
4th May 2025
63AQI
5th May 2025
80AQI
6th May 2025
68AQI
7th May 2025
67AQI
8th May 2025
49AQI
9th May 2025
50AQI
10th May 2025
81AQI
11th May 2025
82AQI
12th May 2025
80AQI
13th May 2025
109AQI
14th May 2025
78AQI
15th May 2025
116AQI
16th May 2025
61AQI
17th May 2025
52AQI
18th May 2025
73AQI
19th May 2025
77AQI
20th May 2025
97AQI
21st May 2025
78AQI
22nd May 2025
112AQI
23rd May 2025
127AQI
24th May 2025
102AQI
25th May 2025
58AQI
26th May 2025
57AQI
27th May 2025
85AQI
28th May 2025
105AQI
29th May 2025
109AQI
30th May 2025
79AQI
31st May 2025
99AQI
1st June 2025
129AQI
2nd June 2025
145AQI
3rd June 2025
95AQI
4th June 2025
95AQI
5th June 2025
110AQI
6th June 2025
113AQI
7th June 2025
86AQI
8th June 2025
124AQI
9th June 2025
148AQI
10th June 2025
139AQI
11th June 2025
62AQI
12th June 2025
55AQI
13th June 2025
67AQI
14th June 2025
41AQI
15th June 2025
44AQI
16th June 2025
54AQI
17th June 2025
59AQI
18th June 2025
102AQI
19th June 2025
93AQI
20th June 2025
122AQI
21st June 2025
56AQI
22nd June 2025
53AQI
23rd June 2025
123AQI
24th June 2025
126AQI
25th June 2025
123AQI
26th June 2025
118AQI
27th June 2025
107AQI
28th June 2025
135AQI
29th June 2025
96AQI
30th June 2025
120AQI
1st July 2025
131AQI
2nd July 2025
144AQI
3rd July 2025
155AQI
4th July 2025
157AQI
5th July 2025
97AQI
6th July 2025
44AQI
7th July 2025
58AQI
8th July 2025
65AQI
9th July 2025
89AQI
10th July 2025
107AQI
11th July 2025
97AQI
12th July 2025
76AQI
13th July 2025
71AQI
14th July 2025
67AQI
15th July 2025
51AQI
16th July 2025
108AQI
17th July 2025
103AQI
18th July 2025
92AQI
19th July 2025
101AQI
20th July 2025
117AQI
21st July 2025
99AQI
22nd July 2025
66AQI
23rd July 2025
105AQI
24th July 2025
70AQI
25th July 2025
37AQI
26th July 2025
64AQI
27th July 2025
49AQI
28th July 2025
35AQI
29th July 2025
74AQI
30th July 2025
35AQI
31st July 2025
41AQI
1st August 2025
30AQI
2nd August 2025
42AQI
3rd August 2025
74AQI

34AQI

40AQI

44AQI

57AQI

81AQI

98AQI

84AQI

49AQI

No. of days

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

202563AQI

31
24
4
24
6
1
13
17
3
21
7
2
12
16
6
15
8
2
2
1
105
76
32
2

Highest AQI recorded in

June

98AQI

Lowest AQI recorded in

January

34AQI

202454AQI

22
8
21
8
22
9
9
20
1
6
21
4
17
11
2
1
24
6
7
20
3
13
17
20
11
27
3
30
1
195
153
16

Highest AQI recorded in

July

88AQI

Lowest AQI recorded in

December

36AQI

202353AQI

25
3
12
10
4
2
22
9
10
18
5
19
6
10
13
6
10
18
1
13
15
3
20
10
17
6
21
3
28
3
193
127
20
2

Highest AQI recorded in

May

77AQI

Lowest AQI recorded in

December

35AQI

202249AQI

31
10
6
1
19
12
14
16
3
20
8
13
15
2
16
8
1
11
18
1
23
8
22
8
25
3
187
115
12

Highest AQI recorded in

May

80AQI

Lowest AQI recorded in

January

31AQI

202162AQI

14
16
22
6
8
23
4
26
5
15
11
6
19
4
1
2
16
13
7
13
11
8
21
16
15
23
6
15
16
130
192
39
1

Highest AQI recorded in

July

92AQI

Lowest AQI recorded in

November

41AQI

202061AQI

3
10
17
1
3
14
4
11
16
3
9
18
4
7
23
1
4
26
16
15
19
11
25
5
94
155
13
3

Highest AQI recorded in

April

91AQI

Lowest AQI recorded in

December

37AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2025(Avg.)
63AQI
Least Polluted Year Recorded
2022(Avg.)
49AQI

Cerro Merquan's annual 2025 AQI (63) shows an average percentage change of 12.7% (worsened AQI) compared to previous years: 2020 (61), 2021 (62), 2022 (49), 2023 (53), 2024 (54).