Country Background

Marubayashi, Koga, Ibaraki, Japan 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

Marubayashi, Koga, Ibaraki, Japan

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
28th Aug 2021
71AQI
Lowest AQI recorded on
30th Aug 2024
11AQI


Same Day Analysis (4th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 46 of Good air quality on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 4th Aug - 5th Aug 2025

Marubayashi, Koga, Ibaraki, Japan

AQI
Day
Night
.

4 AM4th Aug 2025

6 PM

3 AM5th Aug 2025

Day time
Avg. Highest Time
5PM4th Aug

86AQI

Avg. Lowest Time
4AM4th Aug

41AQI

Night time
Avg. Highest Time
7PM4th Aug

72AQI

Avg. Lowest Time
3AM5th Aug

40AQI

In the last 24 hours,

Marubayashi's AQI reached its highest point of 86 at 5 PM during the Day, while the lowest point, 40, was recorded at 3 AM during the Night between 4th Aug and 5th Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Marubayashi, Koga, Ibaraki, Japan

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 - 05th05th
Day
Night
6th Jul 2025484 AMAQI
6th Jul 2025505 AMAQI
6th Jul 2025506 AMAQI
6th Jul 2025497 AMAQI
6th Jul 2025518 AMAQI
6th Jul 2025509 AMAQI
6th Jul 20255510 AMAQI
6th Jul 20255811 AMAQI
6th Jul 20256012 PMAQI
6th Jul 2025591 PMAQI
6th Jul 2025582 PMAQI
6th Jul 2025603 PMAQI
6th Jul 2025644 PMAQI
6th Jul 2025675 PMAQI
6th Jul 2025726 PMAQI
6th Jul 2025767 PMAQI
6th Jul 2025778 PMAQI
6th Jul 2025659 PMAQI
6th Jul 20256610 PMAQI
6th Jul 20257011 PMAQI
7th Jul 20256912 AMAQI
7th Jul 2025621 AMAQI
7th Jul 2025512 AMAQI
7th Jul 2025513 AMAQI

31°C26/36°C

7th Jul 2025524 AMAQI
7th Jul 2025535 AMAQI
7th Jul 2025526 AMAQI
7th Jul 2025537 AMAQI
7th Jul 2025538 AMAQI
7th Jul 2025949 AMAQI
7th Jul 202510910 AMAQI
7th Jul 202510811 AMAQI
7th Jul 202510112 PMAQI
7th Jul 2025931 PMAQI
7th Jul 2025842 PMAQI
7th Jul 2025783 PMAQI
7th Jul 2025764 PMAQI
7th Jul 2025785 PMAQI
7th Jul 2025806 PMAQI
7th Jul 2025807 PMAQI
7th Jul 2025788 PMAQI
7th Jul 2025749 PMAQI
7th Jul 20257610 PMAQI
7th Jul 20257511 PMAQI
8th Jul 20257112 AMAQI
8th Jul 2025621 AMAQI
8th Jul 2025552 AMAQI
8th Jul 2025563 AMAQI

31°C28/36°C

8th Jul 2025584 AMAQI
8th Jul 2025635 AMAQI
8th Jul 2025646 AMAQI
8th Jul 2025647 AMAQI
8th Jul 2025648 AMAQI
8th Jul 2025909 AMAQI
8th Jul 20259910 AMAQI
8th Jul 202510311 AMAQI
8th Jul 20259812 PMAQI
8th Jul 2025891 PMAQI
8th Jul 2025852 PMAQI
8th Jul 2025823 PMAQI
8th Jul 2025824 PMAQI
8th Jul 2025785 PMAQI
8th Jul 2025766 PMAQI
8th Jul 2025787 PMAQI
8th Jul 2025748 PMAQI
8th Jul 2025679 PMAQI
8th Jul 20256810 PMAQI
8th Jul 20257111 PMAQI
9th Jul 20257312 AMAQI
9th Jul 2025671 AMAQI
9th Jul 2025632 AMAQI
9th Jul 2025623 AMAQI

32°C28/37°C

9th Jul 2025644 AMAQI
9th Jul 2025695 AMAQI
9th Jul 2025696 AMAQI
9th Jul 2025697 AMAQI
9th Jul 2025698 AMAQI
9th Jul 2025839 AMAQI
9th Jul 20258810 AMAQI
9th Jul 20258711 AMAQI
9th Jul 20258812 PMAQI
9th Jul 2025881 PMAQI
9th Jul 2025902 PMAQI
9th Jul 2025933 PMAQI
9th Jul 2025914 PMAQI
9th Jul 2025865 PMAQI
9th Jul 2025866 PMAQI
9th Jul 2025867 PMAQI
9th Jul 2025828 PMAQI
9th Jul 2025649 PMAQI
9th Jul 20255910 PMAQI
9th Jul 20255711 PMAQI
10th Jul 20255812 AMAQI
10th Jul 2025631 AMAQI
10th Jul 2025662 AMAQI
10th Jul 2025673 AMAQI

32°C28/37°C

10th Jul 2025684 AMAQI
10th Jul 2025725 AMAQI
10th Jul 2025726 AMAQI
10th Jul 2025717 AMAQI
10th Jul 2025728 AMAQI
10th Jul 2025449 AMAQI
10th Jul 20254610 AMAQI
10th Jul 20255611 AMAQI
10th Jul 20256412 PMAQI
10th Jul 2025721 PMAQI
10th Jul 2025702 PMAQI
10th Jul 2025623 PMAQI
10th Jul 2025554 PMAQI
10th Jul 2025445 PMAQI
10th Jul 2025376 PMAQI
10th Jul 2025367 PMAQI
10th Jul 2025398 PMAQI
10th Jul 2025549 PMAQI
10th Jul 20255510 PMAQI
10th Jul 20255611 PMAQI
11th Jul 20255612 AMAQI
11th Jul 2025621 AMAQI
11th Jul 2025662 AMAQI
11th Jul 2025673 AMAQI

29°C23/37°C

11th Jul 2025684 AMAQI
11th Jul 2025665 AMAQI
11th Jul 2025666 AMAQI
11th Jul 2025677 AMAQI
11th Jul 2025668 AMAQI
11th Jul 2025299 AMAQI
11th Jul 20251710 AMAQI
11th Jul 20251611 AMAQI
11th Jul 20251812 PMAQI
11th Jul 2025261 PMAQI
11th Jul 2025252 PMAQI
11th Jul 2025233 PMAQI
11th Jul 2025284 PMAQI
11th Jul 2025305 PMAQI
11th Jul 2025286 PMAQI
11th Jul 2025267 PMAQI
11th Jul 2025348 PMAQI
11th Jul 2025529 PMAQI
11th Jul 20255310 PMAQI
11th Jul 20255311 PMAQI
12th Jul 20255312 AMAQI
12th Jul 2025561 AMAQI
12th Jul 2025642 AMAQI
12th Jul 2025653 AMAQI

23°C22/25°C

12th Jul 2025634 AMAQI
12th Jul 2025585 AMAQI
12th Jul 2025586 AMAQI
12th Jul 2025587 AMAQI
12th Jul 2025588 AMAQI
12th Jul 2025349 AMAQI
12th Jul 20252610 AMAQI
12th Jul 20253311 AMAQI
12th Jul 20253612 PMAQI
12th Jul 2025371 PMAQI
12th Jul 2025402 PMAQI
12th Jul 2025433 PMAQI
12th Jul 2025454 PMAQI
12th Jul 2025385 PMAQI
12th Jul 2025296 PMAQI
12th Jul 2025317 PMAQI
12th Jul 2025368 PMAQI
12th Jul 2025509 PMAQI
12th Jul 20255010 PMAQI
12th Jul 20255211 PMAQI
13th Jul 20255212 AMAQI
13th Jul 2025561 AMAQI
13th Jul 2025592 AMAQI
13th Jul 2025603 AMAQI

24°C21/28°C

13th Jul 2025604 AMAQI
13th Jul 2025575 AMAQI
13th Jul 2025576 AMAQI
13th Jul 2025577 AMAQI
13th Jul 2025568 AMAQI
13th Jul 2025439 AMAQI
13th Jul 20253610 AMAQI
13th Jul 20254211 AMAQI
13th Jul 20254812 PMAQI
13th Jul 2025521 PMAQI
13th Jul 2025512 PMAQI
13th Jul 2025473 PMAQI
13th Jul 2025444 PMAQI
13th Jul 2025465 PMAQI
13th Jul 2025476 PMAQI
13th Jul 2025407 PMAQI
13th Jul 2025398 PMAQI
13th Jul 2025499 PMAQI
13th Jul 20254410 PMAQI
13th Jul 20254211 PMAQI
14th Jul 20254512 AMAQI
14th Jul 2025521 AMAQI
14th Jul 2025562 AMAQI
14th Jul 2025573 AMAQI

27°C23/32°C

14th Jul 2025564 AMAQI
14th Jul 2025555 AMAQI
14th Jul 2025556 AMAQI
14th Jul 2025557 AMAQI
14th Jul 2025558 AMAQI
14th Jul 2025289 AMAQI
14th Jul 20251810 AMAQI
14th Jul 20252211 AMAQI
14th Jul 20251612 PMAQI
14th Jul 2025241 PMAQI
14th Jul 2025282 PMAQI
14th Jul 2025263 PMAQI
14th Jul 2025234 PMAQI
14th Jul 2025245 PMAQI
14th Jul 2025256 PMAQI
14th Jul 2025277 PMAQI
14th Jul 2025398 PMAQI
14th Jul 2025449 PMAQI
14th Jul 20254510 PMAQI
14th Jul 20254611 PMAQI
15th Jul 20254512 AMAQI
15th Jul 2025501 AMAQI
15th Jul 2025542 AMAQI
15th Jul 2025543 AMAQI

25°C24/28°C

15th Jul 2025544 AMAQI
15th Jul 2025525 AMAQI
15th Jul 2025526 AMAQI
15th Jul 2025527 AMAQI
15th Jul 2025528 AMAQI
15th Jul 2025249 AMAQI
15th Jul 20251710 AMAQI
15th Jul 20252011 AMAQI
15th Jul 20251812 PMAQI
15th Jul 2025231 PMAQI
15th Jul 2025232 PMAQI
15th Jul 2025233 PMAQI
15th Jul 2025224 PMAQI
15th Jul 2025205 PMAQI
15th Jul 2025206 PMAQI
15th Jul 2025217 PMAQI
15th Jul 2025268 PMAQI
15th Jul 2025389 PMAQI
15th Jul 20253810 PMAQI
15th Jul 20253711 PMAQI
16th Jul 20253912 AMAQI
16th Jul 2025471 AMAQI
16th Jul 2025522 AMAQI
16th Jul 2025523 AMAQI

27°C26/31°C

16th Jul 2025524 AMAQI
16th Jul 2025485 AMAQI
16th Jul 2025486 AMAQI
16th Jul 2025487 AMAQI
16th Jul 2025488 AMAQI
16th Jul 2025509 AMAQI
16th Jul 20254810 AMAQI
16th Jul 20254011 AMAQI
16th Jul 20253212 PMAQI
16th Jul 2025301 PMAQI
16th Jul 2025282 PMAQI
16th Jul 2025223 PMAQI
16th Jul 2025214 PMAQI
16th Jul 2025225 PMAQI
16th Jul 2025216 PMAQI
16th Jul 2025197 PMAQI
16th Jul 2025238 PMAQI
16th Jul 2025369 PMAQI
16th Jul 20253610 PMAQI
16th Jul 20253611 PMAQI
17th Jul 20253712 AMAQI
17th Jul 2025451 AMAQI
17th Jul 2025492 AMAQI
17th Jul 2025493 AMAQI

28°C25/31°C

17th Jul 2025494 AMAQI
17th Jul 2025485 AMAQI
17th Jul 2025486 AMAQI
17th Jul 2025487 AMAQI
17th Jul 2025488 AMAQI
17th Jul 2025279 AMAQI
17th Jul 20252210 AMAQI
17th Jul 20252611 AMAQI
17th Jul 20252812 PMAQI
17th Jul 2025271 PMAQI
17th Jul 2025242 PMAQI
17th Jul 2025223 PMAQI
17th Jul 2025224 PMAQI
17th Jul 2025235 PMAQI
17th Jul 2025266 PMAQI
17th Jul 2025407 PMAQI
17th Jul 2025438 PMAQI
17th Jul 2025409 PMAQI
17th Jul 20254010 PMAQI
17th Jul 20253811 PMAQI
18th Jul 20253612 AMAQI
18th Jul 2025431 AMAQI
18th Jul 2025482 AMAQI
18th Jul 2025483 AMAQI

29°C27/33°C

18th Jul 2025474 AMAQI
18th Jul 2025435 AMAQI
18th Jul 2025446 AMAQI
18th Jul 2025447 AMAQI
18th Jul 2025438 AMAQI
18th Jul 2025309 AMAQI
18th Jul 20252910 AMAQI
18th Jul 20253111 AMAQI
18th Jul 20253012 PMAQI
18th Jul 2025261 PMAQI
18th Jul 2025222 PMAQI
18th Jul 2025193 PMAQI
18th Jul 2025214 PMAQI
18th Jul 2025225 PMAQI
18th Jul 2025246 PMAQI
18th Jul 2025247 PMAQI
18th Jul 2025268 PMAQI
18th Jul 2025329 PMAQI
18th Jul 20253410 PMAQI
18th Jul 20253811 PMAQI
19th Jul 20253812 AMAQI
19th Jul 2025421 AMAQI
19th Jul 2025462 AMAQI
19th Jul 2025463 AMAQI

29°C26/34°C

19th Jul 2025444 AMAQI
19th Jul 2025425 AMAQI
19th Jul 2025426 AMAQI
19th Jul 2025427 AMAQI
19th Jul 2025428 AMAQI
19th Jul 2025329 AMAQI
19th Jul 20252810 AMAQI
19th Jul 20253111 AMAQI
19th Jul 20252412 PMAQI
19th Jul 2025181 PMAQI
19th Jul 2025202 PMAQI
19th Jul 2025193 PMAQI
19th Jul 2025224 PMAQI
19th Jul 2025235 PMAQI
19th Jul 2025226 PMAQI
19th Jul 2025267 PMAQI
19th Jul 2025308 PMAQI
19th Jul 2025389 PMAQI
19th Jul 20253910 PMAQI
19th Jul 20253411 PMAQI
20th Jul 20253212 AMAQI
20th Jul 2025381 AMAQI
20th Jul 2025432 AMAQI
20th Jul 2025443 AMAQI

29°C25/34°C

20th Jul 2025424 AMAQI
20th Jul 2025415 AMAQI
20th Jul 2025406 AMAQI
20th Jul 2025407 AMAQI
20th Jul 2025408 AMAQI
20th Jul 2025299 AMAQI
20th Jul 20252210 AMAQI
20th Jul 20252511 AMAQI
20th Jul 20252612 PMAQI
20th Jul 2025261 PMAQI
20th Jul 2025272 PMAQI
20th Jul 2025273 PMAQI
20th Jul 2025314 PMAQI
20th Jul 2025315 PMAQI
20th Jul 2025296 PMAQI
20th Jul 2025277 PMAQI
20th Jul 2025338 PMAQI
20th Jul 2025359 PMAQI
20th Jul 20253210 PMAQI
20th Jul 20253211 PMAQI
21st Jul 20252912 AMAQI
21st Jul 2025361 AMAQI
21st Jul 2025412 AMAQI
21st Jul 2025413 AMAQI

30°C26/36°C

21st Jul 2025404 AMAQI
21st Jul 2025385 AMAQI
21st Jul 2025386 AMAQI
21st Jul 2025377 AMAQI
21st Jul 2025378 AMAQI
21st Jul 2025269 AMAQI
21st Jul 20252810 AMAQI
21st Jul 20253511 AMAQI
21st Jul 20253812 PMAQI
21st Jul 2025361 PMAQI
21st Jul 2025362 PMAQI
21st Jul 2025423 PMAQI
21st Jul 2025404 PMAQI
21st Jul 2025405 PMAQI
21st Jul 2025446 PMAQI
21st Jul 2025407 PMAQI
21st Jul 2025398 PMAQI
21st Jul 2025489 PMAQI
21st Jul 20254410 PMAQI
21st Jul 20253311 PMAQI
22nd Jul 20253012 AMAQI
22nd Jul 2025351 AMAQI
22nd Jul 2025382 AMAQI
22nd Jul 2025383 AMAQI

32°C27/38°C

22nd Jul 2025384 AMAQI
22nd Jul 2025385 AMAQI
22nd Jul 2025386 AMAQI
22nd Jul 2025387 AMAQI
22nd Jul 2025388 AMAQI
22nd Jul 2025349 AMAQI
22nd Jul 20253710 AMAQI
22nd Jul 20253811 AMAQI
22nd Jul 20254012 PMAQI
22nd Jul 2025431 PMAQI
22nd Jul 2025462 PMAQI
22nd Jul 2025483 PMAQI
22nd Jul 2025524 PMAQI
22nd Jul 2025525 PMAQI
22nd Jul 2025486 PMAQI
22nd Jul 2025527 PMAQI
22nd Jul 2025508 PMAQI
22nd Jul 2025389 PMAQI
22nd Jul 20253510 PMAQI
22nd Jul 20253111 PMAQI
23rd Jul 20253312 AMAQI
23rd Jul 2025381 AMAQI
23rd Jul 2025382 AMAQI
23rd Jul 2025383 AMAQI

32°C27/38°C

23rd Jul 2025384 AMAQI
23rd Jul 2025405 AMAQI
23rd Jul 2025396 AMAQI
23rd Jul 2025397 AMAQI
23rd Jul 2025398 AMAQI
23rd Jul 2025299 AMAQI
23rd Jul 20253410 AMAQI
23rd Jul 20254211 AMAQI
23rd Jul 20254412 PMAQI
23rd Jul 2025491 PMAQI
23rd Jul 2025542 PMAQI
23rd Jul 2025543 PMAQI
23rd Jul 2025564 PMAQI
23rd Jul 2025555 PMAQI
23rd Jul 2025556 PMAQI
23rd Jul 2025527 PMAQI
23rd Jul 2025488 PMAQI
23rd Jul 2025439 PMAQI
23rd Jul 20254010 PMAQI
23rd Jul 20253611 PMAQI
24th Jul 20253512 AMAQI
24th Jul 2025371 AMAQI
24th Jul 2025382 AMAQI
24th Jul 2025393 AMAQI

32°C27/38°C

24th Jul 2025394 AMAQI
24th Jul 2025415 AMAQI
24th Jul 2025426 AMAQI
24th Jul 2025417 AMAQI
24th Jul 2025418 AMAQI
24th Jul 2025329 AMAQI
24th Jul 20253310 AMAQI
24th Jul 20254311 AMAQI
24th Jul 20255012 PMAQI
24th Jul 2025541 PMAQI
24th Jul 2025552 PMAQI
24th Jul 2025523 PMAQI
24th Jul 2025504 PMAQI
24th Jul 2025555 PMAQI
24th Jul 2025496 PMAQI
24th Jul 2025517 PMAQI
24th Jul 2025508 PMAQI
24th Jul 2025459 PMAQI
24th Jul 20254210 PMAQI
24th Jul 20253611 PMAQI
25th Jul 20253512 AMAQI
25th Jul 2025361 AMAQI
25th Jul 2025402 AMAQI
25th Jul 2025393 AMAQI

32°C27/38°C

25th Jul 2025414 AMAQI
25th Jul 2025435 AMAQI
25th Jul 2025426 AMAQI
25th Jul 2025427 AMAQI
25th Jul 2025428 AMAQI
25th Jul 2025349 AMAQI
25th Jul 20254110 AMAQI
25th Jul 20254811 AMAQI
25th Jul 20254912 PMAQI
25th Jul 2025521 PMAQI
25th Jul 2025542 PMAQI
25th Jul 2025543 PMAQI
25th Jul 2025564 PMAQI
25th Jul 2025565 PMAQI
25th Jul 2025496 PMAQI
25th Jul 2025417 PMAQI
25th Jul 2025448 PMAQI
25th Jul 2025419 PMAQI
25th Jul 20253410 PMAQI
25th Jul 20253211 PMAQI
26th Jul 20253012 AMAQI
26th Jul 2025351 AMAQI
26th Jul 2025422 AMAQI
26th Jul 2025423 AMAQI

32°C28/38°C

26th Jul 2025434 AMAQI
26th Jul 2025455 AMAQI
26th Jul 2025446 AMAQI
26th Jul 2025457 AMAQI
26th Jul 2025458 AMAQI
26th Jul 2025349 AMAQI
26th Jul 20254010 AMAQI
26th Jul 20255711 AMAQI
26th Jul 20255812 PMAQI
26th Jul 2025561 PMAQI
26th Jul 2025592 PMAQI
26th Jul 2025603 PMAQI
26th Jul 2025614 PMAQI
26th Jul 2025615 PMAQI
26th Jul 2025576 PMAQI
26th Jul 2025457 PMAQI
26th Jul 2025418 PMAQI
26th Jul 2025379 PMAQI
26th Jul 20253110 PMAQI
26th Jul 20253011 PMAQI
27th Jul 20252912 AMAQI
27th Jul 2025361 AMAQI
27th Jul 2025422 AMAQI
27th Jul 2025423 AMAQI

32°C27/38°C

27th Jul 2025444 AMAQI
27th Jul 2025465 AMAQI
27th Jul 2025476 AMAQI
27th Jul 2025467 AMAQI
27th Jul 2025478 AMAQI
27th Jul 2025419 AMAQI
27th Jul 20254210 AMAQI
27th Jul 20254311 AMAQI
27th Jul 20254412 PMAQI
27th Jul 2025451 PMAQI
27th Jul 2025442 PMAQI
27th Jul 2025453 PMAQI
27th Jul 2025434 PMAQI
27th Jul 2025455 PMAQI
27th Jul 2025346 PMAQI
27th Jul 2025287 PMAQI
27th Jul 2025308 PMAQI
27th Jul 2025349 PMAQI
27th Jul 20253110 PMAQI
27th Jul 20253011 PMAQI
28th Jul 20253012 AMAQI
28th Jul 2025361 AMAQI
28th Jul 2025422 AMAQI
28th Jul 2025433 AMAQI

32°C27/38°C

28th Jul 2025444 AMAQI
28th Jul 2025445 AMAQI
28th Jul 2025446 AMAQI
28th Jul 2025437 AMAQI
28th Jul 2025438 AMAQI
28th Jul 2025289 AMAQI
28th Jul 20252610 AMAQI
28th Jul 20253211 AMAQI
28th Jul 20253712 PMAQI
28th Jul 2025411 PMAQI
28th Jul 2025382 PMAQI
28th Jul 2025343 PMAQI
28th Jul 2025394 PMAQI
28th Jul 2025455 PMAQI
28th Jul 2025466 PMAQI
28th Jul 2025437 PMAQI
28th Jul 2025428 PMAQI
28th Jul 2025449 PMAQI
28th Jul 20254610 PMAQI
28th Jul 20254411 PMAQI
29th Jul 20254012 AMAQI
29th Jul 2025411 AMAQI
29th Jul 2025422 AMAQI
29th Jul 2025423 AMAQI

32°C27/39°C

29th Jul 2025424 AMAQI
29th Jul 2025425 AMAQI
29th Jul 2025436 AMAQI
29th Jul 2025427 AMAQI
29th Jul 2025428 AMAQI
29th Jul 2025309 AMAQI
29th Jul 20253510 AMAQI
29th Jul 20254211 AMAQI
29th Jul 20254512 PMAQI
29th Jul 2025461 PMAQI
29th Jul 2025462 PMAQI
29th Jul 2025463 PMAQI
29th Jul 2025454 PMAQI
29th Jul 2025425 PMAQI
29th Jul 2025386 PMAQI
29th Jul 2025307 PMAQI
29th Jul 2025308 PMAQI
29th Jul 2025359 PMAQI
29th Jul 20253210 PMAQI
29th Jul 20253011 PMAQI
30th Jul 20252812 AMAQI
30th Jul 2025301 AMAQI
30th Jul 2025382 AMAQI
30th Jul 2025433 AMAQI

32°C28/39°C

30th Jul 2025444 AMAQI
30th Jul 2025445 AMAQI
30th Jul 2025446 AMAQI
30th Jul 2025447 AMAQI
30th Jul 2025448 AMAQI
30th Jul 2025249 AMAQI
30th Jul 20251610 AMAQI
30th Jul 20251711 AMAQI
30th Jul 20252312 PMAQI
30th Jul 2025271 PMAQI
30th Jul 2025262 PMAQI
30th Jul 2025263 PMAQI
30th Jul 2025264 PMAQI
30th Jul 2025275 PMAQI
30th Jul 2025256 PMAQI
30th Jul 2025327 PMAQI
30th Jul 2025368 PMAQI
30th Jul 2025369 PMAQI
30th Jul 20253410 PMAQI
30th Jul 20253211 PMAQI
31st Jul 20253212 AMAQI
31st Jul 2025361 AMAQI
31st Jul 2025412 AMAQI
31st Jul 2025403 AMAQI

30°C26/37°C

31st Jul 2025414 AMAQI
31st Jul 2025415 AMAQI
31st Jul 2025416 AMAQI
31st Jul 2025417 AMAQI
31st Jul 2025418 AMAQI
31st Jul 2025419 AMAQI
31st Jul 20254110 AMAQI
31st Jul 20253711 AMAQI
31st Jul 20252712 PMAQI
31st Jul 2025261 PMAQI
31st Jul 2025252 PMAQI
31st Jul 2025233 PMAQI
31st Jul 2025244 PMAQI
31st Jul 2025245 PMAQI
31st Jul 2025236 PMAQI
31st Jul 2025247 PMAQI
31st Jul 2025298 PMAQI
31st Jul 2025289 PMAQI
31st Jul 20253310 PMAQI
31st Jul 20252811 PMAQI
1st Aug 20253112 AMAQI
1st Aug 2025331 AMAQI
1st Aug 2025332 AMAQI
1st Aug 2025373 AMAQI

29°C25/35°C

1st Aug 2025384 AMAQI
1st Aug 2025365 AMAQI
1st Aug 2025366 AMAQI
1st Aug 2025357 AMAQI
1st Aug 2025388 AMAQI
1st Aug 2025389 AMAQI
1st Aug 20253410 AMAQI
1st Aug 20253811 AMAQI
1st Aug 20254112 PMAQI
1st Aug 2025331 PMAQI
1st Aug 2025322 PMAQI
1st Aug 2025303 PMAQI
1st Aug 2025424 PMAQI
1st Aug 2025365 PMAQI
1st Aug 2025446 PMAQI
1st Aug 2025267 PMAQI
1st Aug 2025288 PMAQI
1st Aug 2025299 PMAQI
1st Aug 20253310 PMAQI
1st Aug 20252811 PMAQI
2nd Aug 20252912 AMAQI
2nd Aug 2025341 AMAQI
2nd Aug 2025382 AMAQI
2nd Aug 2025393 AMAQI

28°C25/32°C

2nd Aug 2025404 AMAQI
2nd Aug 2025385 AMAQI
2nd Aug 2025406 AMAQI
2nd Aug 2025387 AMAQI
2nd Aug 2025398 AMAQI
2nd Aug 2025339 AMAQI
2nd Aug 20253610 AMAQI
2nd Aug 20254611 AMAQI
2nd Aug 20253012 PMAQI
2nd Aug 2025381 PMAQI
2nd Aug 2025502 PMAQI
2nd Aug 2025493 PMAQI
2nd Aug 2025414 PMAQI
2nd Aug 2025425 PMAQI
2nd Aug 2025466 PMAQI
2nd Aug 2025497 PMAQI
2nd Aug 2025408 PMAQI
2nd Aug 2025389 PMAQI
2nd Aug 20253410 PMAQI
2nd Aug 20254011 PMAQI
3rd Aug 20253312 AMAQI
3rd Aug 2025361 AMAQI
3rd Aug 2025372 AMAQI
3rd Aug 2025383 AMAQI

32°C27/38°C

3rd Aug 2025404 AMAQI
3rd Aug 2025395 AMAQI
3rd Aug 2025386 AMAQI
3rd Aug 2025407 AMAQI
3rd Aug 2025388 AMAQI
3rd Aug 2025449 AMAQI
3rd Aug 20255210 AMAQI
3rd Aug 20254911 AMAQI
3rd Aug 20255712 PMAQI
3rd Aug 2025541 PMAQI
3rd Aug 2025522 PMAQI
3rd Aug 2025493 PMAQI
3rd Aug 2025424 PMAQI
3rd Aug 2025475 PMAQI
3rd Aug 2025506 PMAQI
3rd Aug 2025477 PMAQI
3rd Aug 2025448 PMAQI
3rd Aug 2025409 PMAQI
3rd Aug 20253910 PMAQI
3rd Aug 20253811 PMAQI
4th Aug 20253712 AMAQI
4th Aug 2025381 AMAQI
4th Aug 2025382 AMAQI
4th Aug 2025403 AMAQI

32°C28/38°C

4th Aug 2025414 AMAQI
4th Aug 2025425 AMAQI
4th Aug 2025426 AMAQI
4th Aug 2025427 AMAQI
4th Aug 2025438 AMAQI
4th Aug 2025569 AMAQI
4th Aug 20256410 AMAQI
4th Aug 20257011 AMAQI
4th Aug 20257212 PMAQI
4th Aug 2025701 PMAQI
4th Aug 2025782 PMAQI
4th Aug 2025723 PMAQI
4th Aug 2025784 PMAQI
4th Aug 2025865 PMAQI
4th Aug 2025716 PMAQI
4th Aug 2025727 PMAQI
4th Aug 2025648 PMAQI
4th Aug 2025589 PMAQI
4th Aug 20255510 PMAQI
4th Aug 20254711 PMAQI
5th Aug 20255612 AMAQI
5th Aug 2025411 AMAQI
5th Aug 2025402 AMAQI
5th Aug 2025403 AMAQI

33°C28/38°C

5th Aug 2025504 AMAQI
4 AM
5th Aug 2025525 AMAQI
5th Aug 2025526 AMAQI
5th Aug 2025507 AMAQI
5th Aug 2025528 AMAQI
5th Aug 2025569 AMAQI
5th Aug 20255810 AMAQI
5th Aug 20255611 AMAQI
11 AM
6 PM
11 PM
3 AM

--°C/°C

Day time
Avg. Highest Time
4 AM - 8 AM

48AQI

5 hours / Day
150 hours / Month
Avg. Lowest Time
9 AM - 10 AM

41AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 4 AM to 8 AM (Avg. 48), while the lowest AQI was between 9 AM to 10 AM (Avg. 41).
Night time
Avg. Highest Time
2 AM - 3 AM

47AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
12 AM - 1 AM

43AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 2 AM to 3 AM (Avg. 47), while the lowest AQI was between 12 AM to 1 AM (Avg. 43).

2025 Days Vs Air Quality

Marubayashi, Koga, Ibaraki, Japan

2025

94%

202

6%

14

Total number of days with different AQI categories in last 217 days in 2025 (148 days remaining)

Good
202 Days
Moderate
14 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days



Under WHO’s Safe Air Quality Limits: 94%

Health Risk Level:

Very Low

In 2025, 94% of 217 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.

Annual Air Quality Insights

Marubayashi, Koga, Ibaraki, Japan

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
31AQI
2nd January 2025
29AQI
3rd January 2025
24AQI
4th January 2025
26AQI
5th January 2025
32AQI
6th January 2025
50AQI
7th January 2025
35AQI
8th January 2025
37AQI
9th January 2025
31AQI
10th January 2025
29AQI
11th January 2025
27AQI
12th January 2025
39AQI
13th January 2025
29AQI
14th January 2025
37AQI
15th January 2025
35AQI
16th January 2025
33AQI
17th January 2025
31AQI
18th January 2025
36AQI
19th January 2025
53AQI
20th January 2025
38AQI
21st January 2025
42AQI
22nd January 2025
38AQI
23rd January 2025
42AQI
24th January 2025
43AQI
25th January 2025
35AQI
26th January 2025
33AQI
27th January 2025
36AQI
28th January 2025
40AQI
29th January 2025
32AQI
30th January 2025
32AQI
31st January 2025
29AQI
1st February 2025
39AQI
2nd February 2025
30AQI
3rd February 2025
35AQI
4th February 2025
30AQI
5th February 2025
32AQI
6th February 2025
29AQI
7th February 2025
30AQI
8th February 2025
30AQI
9th February 2025
30AQI
10th February 2025
30AQI
11th February 2025
30AQI
12th February 2025
41AQI
13th February 2025
35AQI
14th February 2025
33AQI
15th February 2025
31AQI
16th February 2025
37AQI
17th February 2025
35AQI
18th February 2025
32AQI
19th February 2025
31AQI
20th February 2025
31AQI
21st February 2025
31AQI
22nd February 2025
31AQI
23rd February 2025
34AQI
24th February 2025
33AQI
25th February 2025
34AQI
26th February 2025
37AQI
27th February 2025
40AQI
28th February 2025
49AQI
1st March 2025
47AQI
2nd March 2025
55AQI
3rd March 2025
40AQI
4th March 2025
37AQI
5th March 2025
28AQI
6th March 2025
31AQI
7th March 2025
31AQI
8th March 2025
38AQI
9th March 2025
34AQI
10th March 2025
37AQI
11th March 2025
38AQI
12th March 2025
41AQI
13th March 2025
40AQI
14th March 2025
31AQI
15th March 2025
35AQI
16th March 2025
21AQI
17th March 2025
21AQI
18th March 2025
22AQI
19th March 2025
18AQI
20th March 2025
23AQI
21st March 2025
37AQI
22nd March 2025
46AQI
23rd March 2025
49AQI
24th March 2025
48AQI
25th March 2025
63AQI
26th March 2025
62AQI
27th March 2025
66AQI
28th March 2025
49AQI
29th March 2025
36AQI
30th March 2025
33AQI
31st March 2025
30AQI
1st April 2025
25AQI
2nd April 2025
21AQI
3rd April 2025
20AQI
4th April 2025
21AQI
5th April 2025
24AQI
6th April 2025
22AQI
7th April 2025
25AQI
8th April 2025
32AQI
9th April 2025
25AQI
10th April 2025
40AQI
11th April 2025
35AQI
12th April 2025
34AQI
13th April 2025
24AQI
14th April 2025
28AQI
15th April 2025
23AQI
16th April 2025
23AQI
17th April 2025
39AQI
18th April 2025
48AQI
19th April 2025
57AQI
20th April 2025
50AQI
21st April 2025
38AQI
22nd April 2025
45AQI
23rd April 2025
27AQI
24th April 2025
35AQI
25th April 2025
31AQI
26th April 2025
38AQI
27th April 2025
40AQI
28th April 2025
42AQI
29th April 2025
29AQI
30th April 2025
39AQI
1st May 2025
34AQI
2nd May 2025
24AQI
3rd May 2025
27AQI
4th May 2025
30AQI
5th May 2025
29AQI
6th May 2025
26AQI
7th May 2025
22AQI
8th May 2025
27AQI
9th May 2025
28AQI
10th May 2025
19AQI
11th May 2025
20AQI
12th May 2025
20AQI
13th May 2025
32AQI
14th May 2025
37AQI
15th May 2025
37AQI
16th May 2025
43AQI
17th May 2025
24AQI
18th May 2025
38AQI
19th May 2025
34AQI
20th May 2025
52AQI
21st May 2025
49AQI
22nd May 2025
44AQI
23rd May 2025
42AQI
24th May 2025
37AQI
25th May 2025
29AQI
26th May 2025
27AQI
27th May 2025
23AQI
28th May 2025
23AQI
29th May 2025
28AQI
30th May 2025
20AQI
31st May 2025
17AQI
1st June 2025
19AQI
2nd June 2025
29AQI
3rd June 2025
28AQI
4th June 2025
25AQI
5th June 2025
32AQI
6th June 2025
41AQI
7th June 2025
46AQI
8th June 2025
55AQI
9th June 2025
48AQI
10th June 2025
33AQI
11th June 2025
29AQI
12th June 2025
38AQI
13th June 2025
37AQI
14th June 2025
32AQI
15th June 2025
29AQI
16th June 2025
37AQI
17th June 2025
43AQI
18th June 2025
38AQI
19th June 2025
41AQI
20th June 2025
39AQI
21st June 2025
33AQI
22nd June 2025
27AQI
23rd June 2025
28AQI
24th June 2025
31AQI
25th June 2025
25AQI
26th June 2025
29AQI
27th June 2025
32AQI
28th June 2025
32AQI
29th June 2025
40AQI
30th June 2025
45AQI
1st July 2025
44AQI
2nd July 2025
48AQI
3rd July 2025
49AQI
4th July 2025
47AQI
5th July 2025
51AQI
6th July 2025
59AQI
7th July 2025
73AQI
8th July 2025
74AQI
9th July 2025
75AQI
10th July 2025
58AQI
11th July 2025
45AQI
12th July 2025
47AQI
13th July 2025
49AQI
14th July 2025
39AQI
15th July 2025
36AQI
16th July 2025
37AQI
17th July 2025
37AQI
18th July 2025
34AQI
19th July 2025
34AQI
20th July 2025
33AQI
21st July 2025
38AQI
22nd July 2025
41AQI
23rd July 2025
43AQI
24th July 2025
44AQI
25th July 2025
43AQI
26th July 2025
45AQI
27th July 2025
39AQI
28th July 2025
40AQI
29th July 2025
39AQI
30th July 2025
33AQI
31st July 2025
33AQI
1st August 2025
34AQI
2nd August 2025
40AQI
3rd August 2025
43AQI
4th August 2025
46AQI

35AQI

34AQI

38AQI

33AQI

30AQI

35AQI

45AQI

41AQI


No. of days

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

202536AQI

30
1
28
27
4
29
1
30
1
29
1
25
6
4
202
14

Highest AQI recorded in

July

45AQI


Lowest AQI recorded in

May

30AQI


202434AQI

30
1
25
4
29
2
27
3
28
3
28
2
23
8
31
29
1
30
1
30
30
1
340
26

Highest AQI recorded in

July

43AQI


Lowest AQI recorded in

August

26AQI


202337AQI

11
2
28
3
24
6
27
4
31
30
31
25
4
26
5
233
24

Highest AQI recorded in

April

43AQI


Lowest AQI recorded in

August

29AQI


202236AQI

25
6
20
1
27
4
16
1
28
3
27
3
18
3
1
28
31
10
2
231
23

Highest AQI recorded in

January

40AQI


Lowest AQI recorded in

September

29AQI


202137AQI

22
9
20
8
24
5
20
1
28
3
26
4
31
29
2
28
2
27
4
22
8
23
8
300
54

Highest AQI recorded in

December

43AQI


Lowest AQI recorded in

March

31AQI


202035AQI

10
3
19
2
17
1
25
5
31
25
6
19
28
3
17
13
22
9
213
42

Highest AQI recorded in

November

45AQI


Lowest AQI recorded in

December

25AQI


Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2021(Avg.)
37AQI
Least Polluted Year Recorded
2024(Avg.)
34AQI


Marubayashi's annual 2025 AQI (36) shows an average percentage change of 0.5% (worsened AQI) compared to previous years: 2020 (35), 2021 (37), 2022 (36), 2023 (37), 2024 (34).