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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

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
31st Aug 2024
111AQI
Lowest AQI recorded on
1st Aug 2026
18AQI

Same Day Analysis (3rd August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 35 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.

Day & Night AQI Trend: 3rd Aug - 4th Aug 2026

Cerro Merquan, Coronel, Biobio, Chile

AQI
Day
Night
.

8 AM3rd Aug 2026

5 PM

7 AM4th Aug 2026

Day time
Avg. Highest Time
6PM3rd Aug

111AQI

Avg. Lowest Time
1PM3rd Aug

7AQI

Night time
Avg. Highest Time
7PM3rd Aug

109AQI

Avg. Lowest Time
9PM3rd Aug

8AQI

In the last 24 hours,

Cerro Merquan's AQI reached its highest point of 111 at 6 PM during the Day, while the lowest point, 7, was recorded at 1 PM during the Day between 3rd Aug and 4th Aug 2026.

Day & Night AQI Trend : Jul - Aug 2026

Cerro Merquan, Coronel, Biobio, Chile

JulAug
06th - 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 - 04th04th
Day
Night
6th Jul 2026668 AMAQI
6th Jul 2026549 AMAQI
6th Jul 20265110 AMAQI
6th Jul 20263011 AMAQI
6th Jul 20265412 PMAQI
6th Jul 20261041 PMAQI
6th Jul 20261022 PMAQI
6th Jul 20261003 PMAQI
6th Jul 20261344 PMAQI
6th Jul 20261285 PMAQI
6th Jul 2026986 PMAQI
6th Jul 20261187 PMAQI
6th Jul 20261378 PMAQI
6th Jul 20261189 PMAQI
6th Jul 20269810 PMAQI
6th Jul 20267911 PMAQI
7th Jul 20267012 AMAQI
7th Jul 2026681 AMAQI
7th Jul 20261542 AMAQI
7th Jul 20261623 AMAQI
7th Jul 2026514 AMAQI
7th Jul 20261345 AMAQI
7th Jul 2026146 AMAQI
7th Jul 2026147 AMAQI

8°C5/13°C

7th Jul 2026118 AMAQI
7th Jul 2026149 AMAQI
7th Jul 20262010 AMAQI
7th Jul 20262011 AMAQI
7th Jul 20262012 PMAQI
7th Jul 2026801 PMAQI
7th Jul 2026182 PMAQI
7th Jul 2026193 PMAQI
7th Jul 2026294 PMAQI
7th Jul 2026295 PMAQI
7th Jul 2026386 PMAQI
7th Jul 2026537 PMAQI
7th Jul 2026588 PMAQI
7th Jul 2026799 PMAQI
7th Jul 202613810 PMAQI
7th Jul 202611511 PMAQI
8th Jul 20265012 AMAQI
8th Jul 2026421 AMAQI
8th Jul 2026402 AMAQI
8th Jul 2026213 AMAQI
8th Jul 2026124 AMAQI
8th Jul 2026235 AMAQI
8th Jul 202696 AMAQI
8th Jul 2026107 AMAQI

11°C9/14°C

8th Jul 2026108 AMAQI
8th Jul 2026149 AMAQI
8th Jul 20261410 AMAQI
8th Jul 2026811 AMAQI
8th Jul 2026912 PMAQI
8th Jul 2026141 PMAQI
8th Jul 2026302 PMAQI
8th Jul 2026463 PMAQI
8th Jul 2026534 PMAQI
8th Jul 2026625 PMAQI
8th Jul 2026646 PMAQI
8th Jul 2026567 PMAQI
8th Jul 2026768 PMAQI
8th Jul 2026909 PMAQI
8th Jul 202610610 PMAQI
8th Jul 20264811 PMAQI
9th Jul 20269812 AMAQI
9th Jul 2026781 AMAQI
9th Jul 2026512 AMAQI
9th Jul 2026803 AMAQI
9th Jul 2026624 AMAQI
9th Jul 2026345 AMAQI
9th Jul 2026276 AMAQI
9th Jul 202687 AMAQI

11°C9/13°C

9th Jul 202688 AMAQI
9th Jul 202689 AMAQI
9th Jul 20262110 AMAQI
9th Jul 20261411 AMAQI
9th Jul 2026812 PMAQI
9th Jul 2026201 PMAQI
9th Jul 2026442 PMAQI
9th Jul 2026403 PMAQI
9th Jul 2026334 PMAQI
9th Jul 2026315 PMAQI
9th Jul 2026386 PMAQI
9th Jul 2026707 PMAQI
9th Jul 20261088 PMAQI
9th Jul 20261169 PMAQI
9th Jul 20267010 PMAQI
9th Jul 20261611 PMAQI
10th Jul 20261112 AMAQI
10th Jul 2026191 AMAQI
10th Jul 2026362 AMAQI
10th Jul 2026383 AMAQI
10th Jul 2026164 AMAQI
10th Jul 2026275 AMAQI
10th Jul 2026146 AMAQI
10th Jul 2026387 AMAQI

10°C9/13°C

10th Jul 2026368 AMAQI
10th Jul 2026189 AMAQI
10th Jul 20261210 AMAQI
10th Jul 20261211 AMAQI
10th Jul 20261712 PMAQI
10th Jul 2026121 PMAQI
10th Jul 2026122 PMAQI
10th Jul 2026253 PMAQI
10th Jul 2026234 PMAQI
10th Jul 2026255 PMAQI
10th Jul 2026386 PMAQI
10th Jul 2026407 PMAQI
10th Jul 2026448 PMAQI
10th Jul 2026539 PMAQI
10th Jul 20267810 PMAQI
10th Jul 20267811 PMAQI
11th Jul 20267612 AMAQI
11th Jul 20261181 AMAQI
11th Jul 2026762 AMAQI
11th Jul 20261183 AMAQI
11th Jul 2026364 AMAQI
11th Jul 2026145 AMAQI
11th Jul 2026406 AMAQI
11th Jul 2026387 AMAQI

12°C9/13°C

11th Jul 2026338 AMAQI
11th Jul 2026319 AMAQI
11th Jul 20263310 AMAQI
11th Jul 20264011 AMAQI
11th Jul 20265812 PMAQI
11th Jul 2026741 PMAQI
11th Jul 2026582 PMAQI
11th Jul 2026603 PMAQI
11th Jul 2026524 PMAQI
11th Jul 2026605 PMAQI
11th Jul 2026406 PMAQI
11th Jul 2026847 PMAQI
11th Jul 20261388 PMAQI
11th Jul 2026589 PMAQI
11th Jul 20264810 PMAQI
11th Jul 20266711 PMAQI
12th Jul 20268212 AMAQI
12th Jul 2026881 AMAQI
12th Jul 2026922 AMAQI
12th Jul 2026583 AMAQI
12th Jul 2026934 AMAQI
12th Jul 20261055 AMAQI
12th Jul 2026566 AMAQI
12th Jul 2026527 AMAQI

11°C8/14°C

12th Jul 2026508 AMAQI
12th Jul 2026909 AMAQI
12th Jul 20264410 AMAQI
12th Jul 20265411 AMAQI
12th Jul 20268612 PMAQI
12th Jul 20261081 PMAQI
12th Jul 20261282 PMAQI
12th Jul 20261003 PMAQI
12th Jul 2026884 PMAQI
12th Jul 20261005 PMAQI
12th Jul 20261126 PMAQI
12th Jul 20261147 PMAQI
12th Jul 20261168 PMAQI
12th Jul 2026659 PMAQI
12th Jul 20265210 PMAQI
12th Jul 20268211 PMAQI
13th Jul 20267612 AMAQI
13th Jul 2026981 AMAQI
13th Jul 2026482 AMAQI
13th Jul 2026983 AMAQI
13th Jul 2026824 AMAQI
13th Jul 2026365 AMAQI
13th Jul 202686 AMAQI
13th Jul 2026127 AMAQI

12°C9/16°C

13th Jul 2026178 AMAQI
13th Jul 2026179 AMAQI
13th Jul 20261410 AMAQI
13th Jul 20261211 AMAQI
13th Jul 20261912 PMAQI
13th Jul 2026141 PMAQI
13th Jul 2026212 PMAQI
13th Jul 2026233 PMAQI
13th Jul 2026384 PMAQI
13th Jul 2026445 PMAQI
13th Jul 2026466 PMAQI
13th Jul 2026527 PMAQI
13th Jul 2026668 PMAQI
13th Jul 2026629 PMAQI
13th Jul 20268910 PMAQI
13th Jul 20264011 PMAQI
14th Jul 202611412 AMAQI
14th Jul 20261111 AMAQI
14th Jul 2026622 AMAQI
14th Jul 2026403 AMAQI
14th Jul 2026384 AMAQI
14th Jul 2026705 AMAQI
14th Jul 2026176 AMAQI
14th Jul 2026127 AMAQI

12°C10/12°C

14th Jul 202688 AMAQI
14th Jul 202689 AMAQI
14th Jul 2026810 AMAQI
14th Jul 2026811 AMAQI
14th Jul 2026812 PMAQI
14th Jul 202681 PMAQI
14th Jul 2026122 PMAQI
14th Jul 2026123 PMAQI
14th Jul 2026124 PMAQI
14th Jul 2026365 PMAQI
14th Jul 2026256 PMAQI
14th Jul 2026107 PMAQI
14th Jul 2026128 PMAQI
14th Jul 2026129 PMAQI
14th Jul 20261910 PMAQI
14th Jul 20262511 PMAQI
15th Jul 20262712 AMAQI
15th Jul 2026341 AMAQI
15th Jul 2026282 AMAQI
15th Jul 2026173 AMAQI
15th Jul 2026144 AMAQI
15th Jul 2026125 AMAQI
15th Jul 2026106 AMAQI
15th Jul 2026127 AMAQI

13°C12/14°C

15th Jul 2026108 AMAQI
15th Jul 2026109 AMAQI
15th Jul 20261210 AMAQI
15th Jul 20262111 AMAQI
15th Jul 20262112 PMAQI
15th Jul 2026251 PMAQI
15th Jul 2026402 PMAQI
15th Jul 2026233 PMAQI
15th Jul 2026234 PMAQI
15th Jul 2026255 PMAQI
15th Jul 2026316 PMAQI
15th Jul 2026387 PMAQI
15th Jul 2026338 PMAQI
15th Jul 2026429 PMAQI
15th Jul 20263210 PMAQI
15th Jul 20262511 PMAQI
16th Jul 20262312 AMAQI
16th Jul 2026211 AMAQI
16th Jul 2026192 AMAQI
16th Jul 2026193 AMAQI
16th Jul 2026104 AMAQI
16th Jul 2026195 AMAQI
16th Jul 2026146 AMAQI
16th Jul 2026157 AMAQI

12°C12/13°C

16th Jul 202688 AMAQI
16th Jul 2026169 AMAQI
16th Jul 20261610 AMAQI
16th Jul 20261811 AMAQI
16th Jul 20262812 PMAQI
16th Jul 2026181 PMAQI
16th Jul 2026182 PMAQI
16th Jul 2026323 PMAQI
16th Jul 2026344 PMAQI
16th Jul 2026265 PMAQI
16th Jul 2026496 PMAQI
16th Jul 2026787 PMAQI
16th Jul 2026848 PMAQI
16th Jul 2026869 PMAQI
16th Jul 202611210 PMAQI
16th Jul 202611011 PMAQI
17th Jul 20269712 AMAQI
17th Jul 2026991 AMAQI
17th Jul 20261082 AMAQI
17th Jul 2026673 AMAQI
17th Jul 2026814 AMAQI
17th Jul 2026795 AMAQI
17th Jul 2026646 AMAQI
17th Jul 2026497 AMAQI

12°C10/13°C

17th Jul 2026448 AMAQI
17th Jul 2026389 AMAQI
17th Jul 20262510 AMAQI
17th Jul 20262911 AMAQI
17th Jul 20263112 PMAQI
17th Jul 2026341 PMAQI
17th Jul 2026312 PMAQI
17th Jul 2026293 PMAQI
17th Jul 2026274 PMAQI
17th Jul 2026275 PMAQI
17th Jul 2026446 PMAQI
17th Jul 2026547 PMAQI
17th Jul 2026588 PMAQI
17th Jul 2026669 PMAQI
17th Jul 20266410 PMAQI
17th Jul 20267211 PMAQI
18th Jul 20267812 AMAQI
18th Jul 2026781 AMAQI
18th Jul 2026622 AMAQI
18th Jul 2026733 AMAQI
18th Jul 2026644 AMAQI
18th Jul 2026455 AMAQI
18th Jul 2026256 AMAQI
18th Jul 2026257 AMAQI

10°C8/12°C

18th Jul 2026218 AMAQI
18th Jul 2026369 AMAQI
18th Jul 20261810 AMAQI
18th Jul 20265111 AMAQI
18th Jul 20265012 PMAQI
18th Jul 2026481 PMAQI
18th Jul 2026382 PMAQI
18th Jul 2026463 PMAQI
18th Jul 2026514 PMAQI
18th Jul 2026545 PMAQI
18th Jul 2026596 PMAQI
18th Jul 2026527 PMAQI
18th Jul 2026768 PMAQI
18th Jul 2026929 PMAQI
18th Jul 20268610 PMAQI
18th Jul 20266411 PMAQI
19th Jul 202610512 AMAQI
19th Jul 20261001 AMAQI
19th Jul 20261062 AMAQI
19th Jul 20261023 AMAQI
19th Jul 2026884 AMAQI
19th Jul 2026865 AMAQI
19th Jul 20261026 AMAQI
19th Jul 2026727 AMAQI

10°C8/12°C

19th Jul 2026628 AMAQI
19th Jul 2026649 AMAQI
19th Jul 20265610 AMAQI
19th Jul 20266811 AMAQI
19th Jul 20265912 PMAQI
19th Jul 2026621 PMAQI
19th Jul 2026842 PMAQI
19th Jul 2026673 PMAQI
19th Jul 2026764 PMAQI
19th Jul 2026345 PMAQI
19th Jul 2026236 PMAQI
19th Jul 2026567 PMAQI
19th Jul 2026658 PMAQI
19th Jul 2026749 PMAQI
19th Jul 20265910 PMAQI
19th Jul 20269711 PMAQI
20th Jul 202610812 AMAQI
20th Jul 20261381 AMAQI
20th Jul 20261392 AMAQI
20th Jul 20261343 AMAQI
20th Jul 20261344 AMAQI
20th Jul 2026905 AMAQI
20th Jul 2026876 AMAQI
20th Jul 2026507 AMAQI

9°C7/11°C

20th Jul 2026198 AMAQI
20th Jul 2026179 AMAQI
20th Jul 20265210 AMAQI
20th Jul 20263111 AMAQI
20th Jul 20266412 PMAQI
20th Jul 2026661 PMAQI
20th Jul 2026192 PMAQI
20th Jul 2026363 PMAQI
20th Jul 2026174 PMAQI
20th Jul 2026305 PMAQI
20th Jul 2026196 PMAQI
20th Jul 2026147 PMAQI
20th Jul 2026428 PMAQI
20th Jul 2026199 PMAQI
20th Jul 20265610 PMAQI
21st Jul 20264912 AMAQI
21st Jul 2026361 AMAQI
21st Jul 2026402 AMAQI
21st Jul 2026193 AMAQI
21st Jul 2026384 AMAQI
21st Jul 2026105 AMAQI
21st Jul 2026346 AMAQI
21st Jul 202677 AMAQI

8°C6/11°C

21st Jul 2026238 AMAQI
21st Jul 202689 AMAQI
21st Jul 20262910 AMAQI
21st Jul 20263311 AMAQI
21st Jul 20264712 PMAQI
21st Jul 2026321 PMAQI
21st Jul 2026252 PMAQI
21st Jul 2026543 PMAQI
21st Jul 2026124 PMAQI
21st Jul 202685 PMAQI
21st Jul 202666 PMAQI
21st Jul 2026527 PMAQI
21st Jul 2026348 PMAQI
21st Jul 2026609 PMAQI
21st Jul 20264810 PMAQI
21st Jul 20264011 PMAQI
22nd Jul 20263612 AMAQI
22nd Jul 2026191 AMAQI
22nd Jul 2026342 AMAQI
22nd Jul 2026563 AMAQI
22nd Jul 2026184 AMAQI
22nd Jul 2026235 AMAQI
22nd Jul 2026256 AMAQI
22nd Jul 2026367 AMAQI

9°C6/12°C

22nd Jul 2026348 AMAQI
22nd Jul 2026389 AMAQI
22nd Jul 20262110 AMAQI
22nd Jul 20262311 AMAQI
22nd Jul 20262312 PMAQI
22nd Jul 2026251 PMAQI
22nd Jul 2026332 PMAQI
22nd Jul 2026293 PMAQI
22nd Jul 2026364 PMAQI
22nd Jul 2026365 PMAQI
22nd Jul 2026446 PMAQI
22nd Jul 2026467 PMAQI
22nd Jul 2026468 PMAQI
22nd Jul 2026409 PMAQI
22nd Jul 20263810 PMAQI
22nd Jul 20264211 PMAQI
23rd Jul 20263612 AMAQI
23rd Jul 2026311 AMAQI
23rd Jul 2026272 AMAQI
23rd Jul 2026253 AMAQI
23rd Jul 2026254 AMAQI
23rd Jul 2026335 AMAQI
23rd Jul 2026296 AMAQI
23rd Jul 2026317 AMAQI

12°C11/13°C

23rd Jul 2026388 AMAQI
23rd Jul 2026329 AMAQI
23rd Jul 20262910 AMAQI
23rd Jul 20262311 AMAQI
23rd Jul 20263612 PMAQI
23rd Jul 2026311 PMAQI
23rd Jul 2026402 PMAQI
23rd Jul 2026363 PMAQI
23rd Jul 2026404 PMAQI
23rd Jul 2026485 PMAQI
23rd Jul 2026496 PMAQI
23rd Jul 2026567 PMAQI
23rd Jul 2026698 PMAQI
23rd Jul 2026879 PMAQI
23rd Jul 20268210 PMAQI
23rd Jul 20264011 PMAQI
24th Jul 20262112 AMAQI
24th Jul 2026541 AMAQI
24th Jul 2026562 AMAQI
24th Jul 2026153 AMAQI
24th Jul 2026104 AMAQI
24th Jul 2026125 AMAQI
24th Jul 2026176 AMAQI
24th Jul 2026187 AMAQI

11°C9/13°C

24th Jul 2026108 AMAQI
24th Jul 2026169 AMAQI
24th Jul 20261410 AMAQI
24th Jul 20261611 AMAQI
24th Jul 20262312 PMAQI
24th Jul 2026181 PMAQI
24th Jul 2026202 PMAQI
24th Jul 2026243 PMAQI
24th Jul 2026224 PMAQI
24th Jul 2026195 PMAQI
24th Jul 2026366 PMAQI
24th Jul 2026407 PMAQI
24th Jul 2026408 PMAQI
24th Jul 20261029 PMAQI
24th Jul 20266910 PMAQI
24th Jul 20267211 PMAQI
25th Jul 20265612 AMAQI
25th Jul 2026491 AMAQI
25th Jul 2026482 AMAQI
25th Jul 2026233 AMAQI
25th Jul 2026184 AMAQI
25th Jul 202685 AMAQI
25th Jul 202696 AMAQI
25th Jul 2026107 AMAQI

11°C9/13°C

25th Jul 2026168 AMAQI
25th Jul 2026169 AMAQI
25th Jul 20262110 AMAQI
25th Jul 20261811 AMAQI
25th Jul 2026812 PMAQI
25th Jul 2026101 PMAQI
25th Jul 2026182 PMAQI
25th Jul 2026253 PMAQI
25th Jul 2026274 PMAQI
25th Jul 2026275 PMAQI
25th Jul 2026296 PMAQI
25th Jul 2026337 PMAQI
25th Jul 2026768 PMAQI
25th Jul 20261009 PMAQI
25th Jul 20268010 PMAQI
25th Jul 20266311 PMAQI
26th Jul 20265412 AMAQI
26th Jul 2026381 AMAQI
26th Jul 2026102 AMAQI
26th Jul 202683 AMAQI
26th Jul 2026464 AMAQI
26th Jul 2026125 AMAQI
26th Jul 2026366 AMAQI
26th Jul 2026127 AMAQI

12°C10/13°C

26th Jul 2026128 AMAQI
26th Jul 2026129 AMAQI
26th Jul 20261210 AMAQI
26th Jul 20261411 AMAQI
26th Jul 20261212 PMAQI
26th Jul 2026141 PMAQI
26th Jul 2026212 PMAQI
26th Jul 2026213 PMAQI
26th Jul 2026214 PMAQI
26th Jul 2026235 PMAQI
26th Jul 2026216 PMAQI
26th Jul 2026327 PMAQI
26th Jul 2026408 PMAQI
26th Jul 2026369 PMAQI
26th Jul 20264210 PMAQI
26th Jul 20264211 PMAQI
27th Jul 20263612 AMAQI
27th Jul 2026251 AMAQI
27th Jul 2026212 AMAQI
27th Jul 2026253 AMAQI
27th Jul 2026204 AMAQI
27th Jul 2026185 AMAQI
27th Jul 2026206 AMAQI
27th Jul 2026307 AMAQI

13°C11/13°C

27th Jul 2026308 AMAQI
27th Jul 2026209 AMAQI
27th Jul 20262010 AMAQI
27th Jul 20262111 AMAQI
27th Jul 20262212 PMAQI
27th Jul 2026241 PMAQI
27th Jul 2026262 PMAQI
27th Jul 2026273 PMAQI
27th Jul 2026344 PMAQI
27th Jul 2026235 PMAQI
27th Jul 2026246 PMAQI
27th Jul 2026387 PMAQI
27th Jul 2026408 PMAQI
27th Jul 2026369 PMAQI
27th Jul 20263610 PMAQI
27th Jul 20263611 PMAQI
28th Jul 20263112 AMAQI
28th Jul 2026311 AMAQI
28th Jul 2026292 AMAQI
28th Jul 2026253 AMAQI
28th Jul 2026234 AMAQI
28th Jul 2026215 AMAQI
28th Jul 2026236 AMAQI
28th Jul 2026257 AMAQI

12°C11/13°C

28th Jul 2026348 AMAQI
28th Jul 2026339 AMAQI
28th Jul 20263110 AMAQI
28th Jul 20264011 AMAQI
28th Jul 20264012 PMAQI
28th Jul 2026331 PMAQI
28th Jul 2026272 PMAQI
28th Jul 2026333 PMAQI
28th Jul 2026274 PMAQI
28th Jul 2026255 PMAQI
28th Jul 2026276 PMAQI
28th Jul 2026407 PMAQI
28th Jul 2026568 PMAQI
28th Jul 2026729 PMAQI
28th Jul 20263210 PMAQI
28th Jul 20262511 PMAQI
29th Jul 20261912 AMAQI
29th Jul 2026171 AMAQI
29th Jul 2026692 AMAQI
29th Jul 2026563 AMAQI
29th Jul 202674 AMAQI
29th Jul 202695 AMAQI
29th Jul 2026346 AMAQI
29th Jul 2026237 AMAQI

10°C8/12°C

29th Jul 2026168 AMAQI
29th Jul 2026219 AMAQI
29th Jul 20261210 AMAQI
29th Jul 20262511 AMAQI
29th Jul 2026812 PMAQI
29th Jul 202681 PMAQI
29th Jul 2026102 PMAQI
29th Jul 2026423 PMAQI
29th Jul 2026534 PMAQI
29th Jul 2026195 PMAQI
29th Jul 2026366 PMAQI
29th Jul 202687 PMAQI
29th Jul 2026808 PMAQI
29th Jul 202699 PMAQI
29th Jul 20261410 PMAQI
29th Jul 20263511 PMAQI
30th Jul 20261212 AMAQI
30th Jul 2026401 AMAQI
30th Jul 2026142 AMAQI
30th Jul 2026573 AMAQI
30th Jul 2026174 AMAQI
30th Jul 202685 AMAQI
30th Jul 2026186 AMAQI
30th Jul 202667 AMAQI

9°C7/13°C

30th Jul 2026128 AMAQI
30th Jul 202689 AMAQI
30th Jul 20262310 AMAQI
30th Jul 20262911 AMAQI
30th Jul 20263112 PMAQI
30th Jul 2026321 PMAQI
30th Jul 2026272 PMAQI
30th Jul 2026213 PMAQI
30th Jul 2026274 PMAQI
30th Jul 2026305 PMAQI
30th Jul 2026236 PMAQI
30th Jul 2026167 PMAQI
30th Jul 2026288 PMAQI
30th Jul 2026719 PMAQI
30th Jul 20266010 PMAQI
30th Jul 20268611 PMAQI
31st Jul 20268312 AMAQI
31st Jul 2026741 AMAQI
31st Jul 2026842 AMAQI
31st Jul 2026563 AMAQI
31st Jul 2026364 AMAQI
31st Jul 2026405 AMAQI
31st Jul 2026456 AMAQI
31st Jul 2026277 AMAQI

12°C10/15°C

31st Jul 2026348 AMAQI
31st Jul 2026299 AMAQI
31st Jul 20263110 AMAQI
31st Jul 20261411 AMAQI
31st Jul 20261012 PMAQI
31st Jul 2026161 PMAQI
31st Jul 2026402 PMAQI
31st Jul 2026503 PMAQI
31st Jul 2026364 PMAQI
31st Jul 2026385 PMAQI
31st Jul 2026336 PMAQI
31st Jul 2026497 PMAQI
31st Jul 2026888 PMAQI
31st Jul 2026929 PMAQI
31st Jul 20268310 PMAQI
31st Jul 20266611 PMAQI
1st Aug 20264512 AMAQI
1st Aug 2026171 AMAQI
1st Aug 2026162 AMAQI
1st Aug 2026233 AMAQI
1st Aug 2026144 AMAQI
1st Aug 202685 AMAQI
1st Aug 2026186 AMAQI
1st Aug 2026207 AMAQI

11°C9/12°C

1st Aug 2026108 AMAQI
1st Aug 202689 AMAQI
1st Aug 2026810 AMAQI
1st Aug 20262011 AMAQI
1st Aug 20261012 PMAQI
1st Aug 2026101 PMAQI
1st Aug 202692 PMAQI
1st Aug 2026143 PMAQI
1st Aug 2026174 PMAQI
1st Aug 2026175 PMAQI
1st Aug 2026156 PMAQI
1st Aug 2026187 PMAQI
1st Aug 2026278 PMAQI
1st Aug 2026329 PMAQI
1st Aug 20263810 PMAQI
1st Aug 20262511 PMAQI
2nd Aug 20263412 AMAQI
2nd Aug 2026421 AMAQI
2nd Aug 2026592 AMAQI
2nd Aug 2026563 AMAQI
2nd Aug 2026274 AMAQI
2nd Aug 2026215 AMAQI
2nd Aug 2026446 AMAQI
2nd Aug 2026377 AMAQI

12°C10/13°C

2nd Aug 2026348 AMAQI
2nd Aug 2026279 AMAQI
2nd Aug 20261910 AMAQI
2nd Aug 20264011 AMAQI
2nd Aug 20264412 PMAQI
2nd Aug 2026521 PMAQI
2nd Aug 2026492 PMAQI
2nd Aug 2026493 PMAQI
2nd Aug 2026454 PMAQI
2nd Aug 2026475 PMAQI
2nd Aug 2026536 PMAQI
2nd Aug 2026567 PMAQI
2nd Aug 2026768 PMAQI
2nd Aug 2026609 PMAQI
2nd Aug 20266610 PMAQI
2nd Aug 20266211 PMAQI
3rd Aug 20264612 AMAQI
3rd Aug 2026291 AMAQI
3rd Aug 2026182 AMAQI
3rd Aug 202683 AMAQI
3rd Aug 2026234 AMAQI
3rd Aug 202685 AMAQI
3rd Aug 202686 AMAQI
3rd Aug 2026147 AMAQI

11°C10/13°C

3rd Aug 2026168 AMAQI
3rd Aug 202689 AMAQI
3rd Aug 20262310 AMAQI
3rd Aug 2026811 AMAQI
3rd Aug 2026712 PMAQI
3rd Aug 202671 PMAQI
3rd Aug 2026382 PMAQI
3rd Aug 2026333 PMAQI
3rd Aug 2026404 PMAQI
3rd Aug 2026545 PMAQI
3rd Aug 20261116 PMAQI
3rd Aug 20261097 PMAQI
3rd Aug 20261048 PMAQI
3rd Aug 202689 PMAQI
3rd Aug 20265210 PMAQI
3rd Aug 20267311 PMAQI
4th Aug 20266012 AMAQI
4th Aug 2026401 AMAQI
4th Aug 2026192 AMAQI
4th Aug 2026213 AMAQI
4th Aug 2026234 AMAQI
4th Aug 2026445 AMAQI
4th Aug 2026496 AMAQI
4th Aug 202687 AMAQI

11°C10/12°C

4th Aug 2026258 AMAQI
8 AM
4th Aug 2026299 AMAQI
4th Aug 20262710 AMAQI
4th Aug 20261711 AMAQI
4th Aug 20264612 PMAQI
12 PM
4th Aug 2026511 PMAQI
4th Aug 2026532 PMAQI
4th Aug 2026363 PMAQI
4th Aug 2026284 PMAQI
4th Aug 2026365 PMAQI
5 PM
4th Aug 2026446 PMAQI
4th Aug 2026537 PMAQI
4th Aug 2026588 PMAQI
4th Aug 2026909 PMAQI
4th Aug 202610610 PMAQI
4th Aug 20263311 PMAQI
12 AM
7 AM

11°C10/13°C

Day time
Avg. Highest Time
3 PM - 5 PM

39AQI

3 hours / Day
90 hours / Month
Avg. Lowest Time
10 AM

24AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 3 PM to 5 PM (Avg. 39), while the lowest AQI was between 10 AM to 10 AM (Avg. 24).
Night time
Avg. Highest Time
8 PM

66AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
7 AM

27AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 8 PM to 8 PM (Avg. 66), while the lowest AQI was between 7 AM to 7 AM (Avg. 27).

2026 Days Vs Air Quality

Cerro Merquan, Coronel, Biobio, Chile

2026

73%

154

27%

58

Total number of days with different AQI categories in last 216 days in 2026 (149 days remaining)

Good
154 Days
Moderate
58 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 73%

Health Risk Level:

Low

In 2026, 73% of 216 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

Cerro Merquan, Coronel, 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
60AQI (US)
2nd January 2026
53AQI (US)
3rd January 2026
50AQI (US)
4th January 2026
35AQI (US)
5th January 2026
54AQI (US)
6th January 2026
27AQI (US)
7th January 2026
47AQI (US)
8th January 2026
57AQI (US)
9th January 2026
59AQI (US)
10th January 2026
28AQI (US)
11th January 2026
31AQI (US)
12th January 2026
22AQI (US)
13th January 2026
51AQI (US)
14th January 2026
29AQI (US)
15th January 2026
24AQI (US)
16th January 2026
36AQI (US)
17th January 2026
36AQI (US)
18th January 2026
43AQI (US)
19th January 2026
76AQI (US)
20th January 2026
58AQI (US)
21st January 2026
33AQI (US)
22nd January 2026
50AQI (US)
23rd January 2026
52AQI (US)
24th January 2026
45AQI (US)
25th January 2026
48AQI (US)
26th January 2026
46AQI (US)
27th January 2026
41AQI (US)
28th January 2026
45AQI (US)
29th January 2026
45AQI (US)
30th January 2026
49AQI (US)
31st January 2026
44AQI (US)
1st February 2026
46AQI (US)
2nd February 2026
54AQI (US)
3rd February 2026
51AQI (US)
4th February 2026
50AQI (US)
5th February 2026
48AQI (US)
6th February 2026
45AQI (US)
7th February 2026
42AQI (US)
8th February 2026
47AQI (US)
9th February 2026
47AQI (US)
10th February 2026
42AQI (US)
11th February 2026
44AQI (US)
12th February 2026
44AQI (US)
13th February 2026
52AQI (US)
14th February 2026
53AQI (US)
15th February 2026
42AQI (US)
16th February 2026
47AQI (US)
17th February 2026
45AQI (US)
18th February 2026
46AQI (US)
19th February 2026
50AQI (US)
20th February 2026
44AQI (US)
21st February 2026
38AQI (US)
22nd February 2026
34AQI (US)
23rd February 2026
39AQI (US)
24th February 2026
42AQI (US)
25th February 2026
42AQI (US)
26th February 2026
33AQI (US)
27th February 2026
33AQI (US)
28th February 2026
34AQI (US)
1st March 2026
39AQI (US)
2nd March 2026
48AQI (US)
3rd March 2026
44AQI (US)
4th March 2026
41AQI (US)
5th March 2026
37AQI (US)
6th March 2026
34AQI (US)
7th March 2026
35AQI (US)
8th March 2026
35AQI (US)
9th March 2026
39AQI (US)
10th March 2026
31AQI (US)
11th March 2026
36AQI (US)
12th March 2026
39AQI (US)
13th March 2026
38AQI (US)
14th March 2026
34AQI (US)
15th March 2026
32AQI (US)
16th March 2026
35AQI (US)
17th March 2026
35AQI (US)
18th March 2026
33AQI (US)
19th March 2026
32AQI (US)
20th March 2026
33AQI (US)
21st March 2026
33AQI (US)
22nd March 2026
34AQI (US)
23rd March 2026
39AQI (US)
24th March 2026
35AQI (US)
25th March 2026
33AQI (US)
26th March 2026
29AQI (US)
27th March 2026
31AQI (US)
28th March 2026
32AQI (US)
29th March 2026
30AQI (US)
30th March 2026
29AQI (US)
31st March 2026
26AQI (US)
1st April 2026
31AQI (US)
2nd April 2026
32AQI (US)
3rd April 2026
29AQI (US)
4th April 2026
28AQI (US)
5th April 2026
30AQI (US)
6th April 2026
34AQI (US)
7th April 2026
30AQI (US)
8th April 2026
36AQI (US)
9th April 2026
28AQI (US)
10th April 2026
35AQI (US)
11th April 2026
35AQI (US)
12th April 2026
31AQI (US)
13th April 2026
31AQI (US)
14th April 2026
32AQI (US)
15th April 2026
30AQI (US)
16th April 2026
31AQI (US)
17th April 2026
18th April 2026
32AQI (US)
19th April 2026
34AQI (US)
20th April 2026
32AQI (US)
21st April 2026
27AQI (US)
22nd April 2026
23rd April 2026
24AQI (US)
24th April 2026
28AQI (US)
25th April 2026
29AQI (US)
26th April 2026
34AQI (US)
27th April 2026
29AQI (US)
28th April 2026
26AQI (US)
29th April 2026
26AQI (US)
30th April 2026
27AQI (US)
1st May 2026
28AQI (US)
2nd May 2026
26AQI (US)
3rd May 2026
25AQI (US)
4th May 2026
29AQI (US)
5th May 2026
33AQI (US)
6th May 2026
34AQI (US)
7th May 2026
30AQI (US)
8th May 2026
29AQI (US)
9th May 2026
10th May 2026
32AQI (US)
11th May 2026
34AQI (US)
12th May 2026
35AQI (US)
13th May 2026
34AQI (US)
14th May 2026
30AQI (US)
15th May 2026
51AQI (US)
16th May 2026
53AQI (US)
17th May 2026
41AQI (US)
18th May 2026
39AQI (US)
19th May 2026
53AQI (US)
20th May 2026
55AQI (US)
21st May 2026
49AQI (US)
22nd May 2026
54AQI (US)
23rd May 2026
57AQI (US)
24th May 2026
58AQI (US)
25th May 2026
71AQI (US)
26th May 2026
70AQI (US)
27th May 2026
35AQI (US)
28th May 2026
31AQI (US)
29th May 2026
55AQI (US)
30th May 2026
83AQI (US)
31st May 2026
77AQI (US)
1st June 2026
53AQI (US)
2nd June 2026
29AQI (US)
3rd June 2026
53AQI (US)
4th June 2026
74AQI (US)
5th June 2026
67AQI (US)
6th June 2026
65AQI (US)
7th June 2026
87AQI (US)
8th June 2026
81AQI (US)
9th June 2026
35AQI (US)
10th June 2026
29AQI (US)
11th June 2026
56AQI (US)
12th June 2026
32AQI (US)
13th June 2026
33AQI (US)
14th June 2026
80AQI (US)
15th June 2026
63AQI (US)
16th June 2026
99AQI (US)
17th June 2026
71AQI (US)
18th June 2026
70AQI (US)
19th June 2026
59AQI (US)
20th June 2026
47AQI (US)
21st June 2026
44AQI (US)
22nd June 2026
54AQI (US)
23rd June 2026
63AQI (US)
24th June 2026
54AQI (US)
25th June 2026
55AQI (US)
26th June 2026
54AQI (US)
27th June 2026
51AQI (US)
28th June 2026
58AQI (US)
29th June 2026
71AQI (US)
30th June 2026
49AQI (US)
1st July 2026
35AQI (US)
2nd July 2026
45AQI (US)
3rd July 2026
60AQI (US)
4th July 2026
54AQI (US)
5th July 2026
60AQI (US)
6th July 2026
80AQI (US)
7th July 2026
59AQI (US)
8th July 2026
38AQI (US)
9th July 2026
45AQI (US)
10th July 2026
30AQI (US)
11th July 2026
60AQI (US)
12th July 2026
84AQI (US)
13th July 2026
43AQI (US)
14th July 2026
29AQI (US)
15th July 2026
24AQI (US)
16th July 2026
36AQI (US)
17th July 2026
55AQI (US)
18th July 2026
54AQI (US)
19th July 2026
74AQI (US)
20th July 2026
60AQI (US)
21st July 2026
31AQI (US)
22nd July 2026
33AQI (US)
23rd July 2026
41AQI (US)
24th July 2026
31AQI (US)
25th July 2026
33AQI (US)
26th July 2026
25AQI (US)
27th July 2026
27AQI (US)
28th July 2026
33AQI (US)
29th July 2026
26AQI (US)
30th July 2026
29AQI (US)
31st July 2026
48AQI (US)
1st August 2026
18AQI (US)
2nd August 2026
46AQI (US)
3rd August 2026
35AQI (US)
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

44AQI (US)

44AQI (US)

35AQI (US)

30AQI (US)

44AQI (US)

58AQI (US)

45AQI (US)

33AQI (US)

No. of days

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

202643AQI (US)

22
9
24
4
31
28
18
12
8
22
20
11
3
154
58

Highest AQI (US) recorded in

June

58AQI (US)

Lowest AQI (US) recorded in

April

30AQI (US)

202556AQI (US)

31
24
4
24
6
1
13
17
3
21
7
2
12
16
6
15
8
2
7
23
1
21
9
19
12
21
9
26
5
197
133
33
2

Highest AQI (US) recorded in

June

98AQI (US)

Lowest AQI (US) recorded in

January

34AQI (US)

202454AQI (US)

21
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
194
153
16

Highest AQI (US) recorded in

July

88AQI (US)

Lowest AQI (US) recorded in

December

36AQI (US)

202353AQI (US)

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 (US) recorded in

May

77AQI (US)

Lowest AQI (US) recorded in

December

35AQI (US)

202249AQI (US)

30
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
186
115
12

Highest AQI (US) recorded in

May

80AQI (US)

Lowest AQI (US) recorded in

January

32AQI (US)

202162AQI (US)

13
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
129
192
39
1

Highest AQI (US) recorded in

July

92AQI (US)

Lowest AQI (US) recorded in

November

41AQI (US)

202061AQI (US)

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 (US) recorded in

April

91AQI (US)

Lowest AQI (US) recorded in

December

37AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2021(Avg.)
62AQI (US)
Least Polluted Year Recorded
2026(Avg.)
43AQI (US)

Cerro Merquan's annual 2026 AQI (US) (43) shows an average percentage change of -22.4% (improved AQI (US)) compared to previous years: 2020 (61), 2021 (62), 2022 (49), 2023 (53), 2024 (54), 2025 (56).