Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Otawara, Tochigi, 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

Otawara, Tochigi, Japan

2021
2022
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
4th Aug 2025
54AQI
Lowest AQI recorded on
14th Aug 2021
18AQI

Same Day Analysis (9th August ):
On this day, AQI across the 4 years varied significantly: 2025 ranks 2nd highest AQI at 36 of Good air quality, showing improvement over 2021 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 10th Aug - 11th Aug 2025

Otawara, Tochigi, Japan

AQI
Day
Night
.

4 AM10th Aug 2025

6 PM

3 AM11th Aug 2025

Day time
Avg. Highest Time
12AMNaNth undefined

AQI

Avg. Lowest Time
12AMNaNth undefined

AQI

Night time
Avg. Highest Time
12PM10th Aug

42AQI

Avg. Lowest Time
9AM10th Aug

35AQI

In the last 24 hours,

Otawara's AQI reached its highest point of 42 at 12 PM during the Night, while the lowest point, undefined, was recorded at 3 AM during the Night between 10th Aug and 11th Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Otawara, Tochigi, Japan

JulAug
12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th
Day
Night
12th Jul 2025584 AMAQI
12th Jul 2025565 AMAQI
12th Jul 2025566 AMAQI
12th Jul 2025567 AMAQI
12th Jul 2025568 AMAQI
12th Jul 2025309 AMAQI
12th Jul 20252110 AMAQI
12th Jul 20252611 AMAQI
12th Jul 20252712 PMAQI
12th Jul 2025361 PMAQI
12th Jul 2025372 PMAQI
12th Jul 2025353 PMAQI
12th Jul 2025364 PMAQI
12th Jul 2025375 PMAQI
12th Jul 2025396 PMAQI
12th Jul 2025447 PMAQI
12th Jul 2025448 PMAQI
12th Jul 2025539 PMAQI
12th Jul 20255210 PMAQI
12th Jul 20255211 PMAQI
13th Jul 20255212 AMAQI
13th Jul 2025541 AMAQI
13th Jul 2025552 AMAQI
13th Jul 2025563 AMAQI

20°C17/24°C

13th Jul 2025554 AMAQI
13th Jul 2025545 AMAQI
13th Jul 2025546 AMAQI
13th Jul 2025547 AMAQI
13th Jul 2025548 AMAQI
13th Jul 2025429 AMAQI
13th Jul 20253410 AMAQI
13th Jul 20253711 AMAQI
13th Jul 20253912 PMAQI
13th Jul 2025451 PMAQI
13th Jul 2025482 PMAQI
13th Jul 2025503 PMAQI
13th Jul 2025484 PMAQI
13th Jul 2025495 PMAQI
13th Jul 2025516 PMAQI
13th Jul 2025527 PMAQI
13th Jul 2025528 PMAQI
13th Jul 2025539 PMAQI
13th Jul 20255210 PMAQI
13th Jul 20255211 PMAQI
14th Jul 20255212 AMAQI
14th Jul 2025521 AMAQI
14th Jul 2025532 AMAQI
14th Jul 2025543 AMAQI

23°C17/28°C

14th Jul 2025534 AMAQI
14th Jul 2025535 AMAQI
14th Jul 2025536 AMAQI
14th Jul 2025527 AMAQI
14th Jul 2025538 AMAQI
14th Jul 2025269 AMAQI
14th Jul 20251710 AMAQI
14th Jul 20251611 AMAQI
14th Jul 20251712 PMAQI
14th Jul 2025241 PMAQI
14th Jul 2025252 PMAQI
14th Jul 2025233 PMAQI
14th Jul 2025224 PMAQI
14th Jul 2025245 PMAQI
14th Jul 2025256 PMAQI
14th Jul 2025267 PMAQI
14th Jul 2025318 PMAQI
14th Jul 2025479 PMAQI
14th Jul 20254610 PMAQI
14th Jul 20254711 PMAQI
15th Jul 20254712 AMAQI
15th Jul 2025491 AMAQI
15th Jul 2025522 AMAQI
15th Jul 2025523 AMAQI

23°C20/27°C

15th Jul 2025524 AMAQI
15th Jul 2025505 AMAQI
15th Jul 2025506 AMAQI
15th Jul 2025517 AMAQI
15th Jul 2025508 AMAQI
15th Jul 2025269 AMAQI
15th Jul 20251710 AMAQI
15th Jul 20251911 AMAQI
15th Jul 20252012 PMAQI
15th Jul 2025281 PMAQI
15th Jul 2025262 PMAQI
15th Jul 2025273 PMAQI
15th Jul 2025264 PMAQI
15th Jul 2025265 PMAQI
15th Jul 2025276 PMAQI
15th Jul 2025267 PMAQI
15th Jul 2025278 PMAQI
15th Jul 2025439 PMAQI
15th Jul 20254210 PMAQI
15th Jul 20254211 PMAQI
16th Jul 20254112 AMAQI
16th Jul 2025461 AMAQI
16th Jul 2025502 AMAQI
16th Jul 2025513 AMAQI

24°C23/26°C

16th Jul 2025504 AMAQI
16th Jul 2025485 AMAQI
16th Jul 2025486 AMAQI
16th Jul 2025467 AMAQI
16th Jul 2025488 AMAQI
16th Jul 2025439 AMAQI
16th Jul 20254910 AMAQI
16th Jul 20255311 AMAQI
16th Jul 20255212 PMAQI
16th Jul 2025411 PMAQI
16th Jul 2025412 PMAQI
16th Jul 2025403 PMAQI
16th Jul 2025334 PMAQI
16th Jul 2025315 PMAQI
16th Jul 2025326 PMAQI
16th Jul 2025327 PMAQI
16th Jul 2025338 PMAQI
16th Jul 2025409 PMAQI
16th Jul 20254010 PMAQI
16th Jul 20253911 PMAQI
17th Jul 20254012 AMAQI
17th Jul 2025421 AMAQI
17th Jul 2025442 AMAQI
17th Jul 2025473 AMAQI

24°C22/28°C

17th Jul 2025474 AMAQI
17th Jul 2025465 AMAQI
17th Jul 2025466 AMAQI
17th Jul 2025467 AMAQI
17th Jul 2025468 AMAQI
17th Jul 2025269 AMAQI
17th Jul 20251810 AMAQI
17th Jul 20251911 AMAQI
17th Jul 20252212 PMAQI
17th Jul 2025301 PMAQI
17th Jul 2025302 PMAQI
17th Jul 2025293 PMAQI
17th Jul 2025304 PMAQI
17th Jul 2025305 PMAQI
17th Jul 2025326 PMAQI
17th Jul 2025347 PMAQI
17th Jul 2025368 PMAQI
17th Jul 2025419 PMAQI
17th Jul 20254110 PMAQI
17th Jul 20254111 PMAQI
18th Jul 20254112 AMAQI
18th Jul 2025411 AMAQI
18th Jul 2025442 AMAQI
18th Jul 2025433 AMAQI

25°C22/30°C

18th Jul 2025434 AMAQI
18th Jul 2025415 AMAQI
18th Jul 2025406 AMAQI
18th Jul 2025427 AMAQI
18th Jul 2025418 AMAQI
18th Jul 2025309 AMAQI
18th Jul 20253010 AMAQI
18th Jul 20253211 AMAQI
18th Jul 20253312 PMAQI
18th Jul 2025371 PMAQI
18th Jul 2025362 PMAQI
18th Jul 2025363 PMAQI
18th Jul 2025384 PMAQI
18th Jul 2025375 PMAQI
18th Jul 2025326 PMAQI
18th Jul 2025347 PMAQI
18th Jul 2025368 PMAQI
18th Jul 2025399 PMAQI
18th Jul 20253810 PMAQI
18th Jul 20253811 PMAQI
19th Jul 20253812 AMAQI
19th Jul 2025421 AMAQI
19th Jul 2025422 AMAQI
19th Jul 2025443 AMAQI

25°C21/31°C

19th Jul 2025424 AMAQI
19th Jul 2025425 AMAQI
19th Jul 2025416 AMAQI
19th Jul 2025417 AMAQI
19th Jul 2025418 AMAQI
19th Jul 2025349 AMAQI
19th Jul 20253710 AMAQI
19th Jul 20253411 AMAQI
19th Jul 20253512 PMAQI
19th Jul 2025361 PMAQI
19th Jul 2025342 PMAQI
19th Jul 2025323 PMAQI
19th Jul 2025334 PMAQI
19th Jul 2025365 PMAQI
19th Jul 2025376 PMAQI
19th Jul 2025357 PMAQI
19th Jul 2025348 PMAQI
19th Jul 2025379 PMAQI
19th Jul 20253710 PMAQI
19th Jul 20253811 PMAQI
20th Jul 20253812 AMAQI
20th Jul 2025391 AMAQI
20th Jul 2025402 AMAQI
20th Jul 2025403 AMAQI

25°C21/32°C

20th Jul 2025414 AMAQI
20th Jul 2025405 AMAQI
20th Jul 2025396 AMAQI
20th Jul 2025407 AMAQI
20th Jul 2025408 AMAQI
20th Jul 2025349 AMAQI
20th Jul 20252910 AMAQI
20th Jul 20253311 AMAQI
20th Jul 20253712 PMAQI
20th Jul 2025451 PMAQI
20th Jul 2025512 PMAQI
20th Jul 2025443 PMAQI
20th Jul 2025434 PMAQI
20th Jul 2025465 PMAQI
20th Jul 2025446 PMAQI
20th Jul 2025457 PMAQI
20th Jul 2025438 PMAQI
20th Jul 2025439 PMAQI
20th Jul 20254410 PMAQI
20th Jul 20254411 PMAQI
21st Jul 20254212 AMAQI
21st Jul 2025411 AMAQI
21st Jul 2025402 AMAQI
21st Jul 2025403 AMAQI

27°C22/33°C

21st Jul 2025394 AMAQI
21st Jul 2025395 AMAQI
21st Jul 2025386 AMAQI
21st Jul 2025397 AMAQI
21st Jul 2025388 AMAQI
21st Jul 2025429 AMAQI
21st Jul 20254910 AMAQI
21st Jul 20254611 AMAQI
21st Jul 20254912 PMAQI
21st Jul 2025501 PMAQI
21st Jul 2025462 PMAQI
21st Jul 2025503 PMAQI
21st Jul 2025514 PMAQI
21st Jul 2025485 PMAQI
21st Jul 2025446 PMAQI
21st Jul 2025387 PMAQI
21st Jul 2025378 PMAQI
21st Jul 2025419 PMAQI
21st Jul 20254310 PMAQI
21st Jul 20254411 PMAQI
22nd Jul 20254012 AMAQI
22nd Jul 2025401 AMAQI
22nd Jul 2025402 AMAQI
22nd Jul 2025403 AMAQI

28°C22/35°C

22nd Jul 2025404 AMAQI
22nd Jul 2025435 AMAQI
22nd Jul 2025426 AMAQI
22nd Jul 2025427 AMAQI
22nd Jul 2025428 AMAQI
22nd Jul 2025489 AMAQI
22nd Jul 20255110 AMAQI
22nd Jul 20255411 AMAQI
22nd Jul 20255712 PMAQI
22nd Jul 2025511 PMAQI
22nd Jul 2025522 PMAQI
22nd Jul 2025543 PMAQI
22nd Jul 2025544 PMAQI
22nd Jul 2025595 PMAQI
22nd Jul 2025566 PMAQI
22nd Jul 2025487 PMAQI
22nd Jul 2025368 PMAQI
22nd Jul 2025399 PMAQI
22nd Jul 20254210 PMAQI
22nd Jul 20254311 PMAQI
23rd Jul 20254212 AMAQI
23rd Jul 2025421 AMAQI
23rd Jul 2025402 AMAQI
23rd Jul 2025413 AMAQI

28°C22/35°C

23rd Jul 2025424 AMAQI
23rd Jul 2025435 AMAQI
23rd Jul 2025436 AMAQI
23rd Jul 2025437 AMAQI
23rd Jul 2025448 AMAQI
23rd Jul 2025529 AMAQI
23rd Jul 20255710 AMAQI
23rd Jul 20255811 AMAQI
23rd Jul 20255812 PMAQI
23rd Jul 2025601 PMAQI
23rd Jul 2025572 PMAQI
23rd Jul 2025583 PMAQI
23rd Jul 2025544 PMAQI
23rd Jul 2025415 PMAQI
23rd Jul 2025446 PMAQI
23rd Jul 2025457 PMAQI
23rd Jul 2025468 PMAQI
23rd Jul 2025459 PMAQI
23rd Jul 20254610 PMAQI
23rd Jul 20254611 PMAQI
24th Jul 20254512 AMAQI
24th Jul 2025431 AMAQI
24th Jul 2025442 AMAQI
24th Jul 2025433 AMAQI

28°C23/35°C

24th Jul 2025444 AMAQI
24th Jul 2025465 AMAQI
24th Jul 2025466 AMAQI
24th Jul 2025467 AMAQI
24th Jul 2025468 AMAQI
24th Jul 2025539 AMAQI
24th Jul 20255610 AMAQI
24th Jul 20255611 AMAQI
24th Jul 20255612 PMAQI
24th Jul 2025571 PMAQI
24th Jul 2025582 PMAQI
24th Jul 2025563 PMAQI
24th Jul 2025544 PMAQI
24th Jul 2025545 PMAQI
24th Jul 2025546 PMAQI
24th Jul 2025567 PMAQI
24th Jul 2025578 PMAQI
24th Jul 2025549 PMAQI
24th Jul 20255410 PMAQI
24th Jul 20255211 PMAQI
25th Jul 20255212 AMAQI
25th Jul 2025491 AMAQI
25th Jul 2025462 AMAQI
25th Jul 2025453 AMAQI

28°C22/35°C

25th Jul 2025464 AMAQI
25th Jul 2025475 AMAQI
25th Jul 2025476 AMAQI
25th Jul 2025477 AMAQI
25th Jul 2025478 AMAQI
25th Jul 2025549 AMAQI
25th Jul 20255810 AMAQI
25th Jul 20255811 AMAQI
25th Jul 20255912 PMAQI
25th Jul 2025601 PMAQI
25th Jul 2025602 PMAQI
25th Jul 2025603 PMAQI
25th Jul 2025564 PMAQI
25th Jul 2025425 PMAQI
25th Jul 2025436 PMAQI
25th Jul 2025497 PMAQI
25th Jul 2025528 PMAQI
25th Jul 2025519 PMAQI
25th Jul 20255110 PMAQI
25th Jul 20255211 PMAQI
26th Jul 20255012 AMAQI
26th Jul 2025491 AMAQI
26th Jul 2025482 AMAQI
26th Jul 2025483 AMAQI

27°C22/35°C

26th Jul 2025504 AMAQI
26th Jul 2025525 AMAQI
26th Jul 2025526 AMAQI
26th Jul 2025527 AMAQI
26th Jul 2025528 AMAQI
26th Jul 2025549 AMAQI
26th Jul 20255610 AMAQI
26th Jul 20255611 AMAQI
26th Jul 20255512 PMAQI
26th Jul 2025551 PMAQI
26th Jul 2025512 PMAQI
26th Jul 2025443 PMAQI
26th Jul 2025464 PMAQI
26th Jul 2025515 PMAQI
26th Jul 2025526 PMAQI
26th Jul 2025537 PMAQI
26th Jul 2025528 PMAQI
26th Jul 2025529 PMAQI
26th Jul 20254910 PMAQI
26th Jul 20255011 PMAQI
27th Jul 20255112 AMAQI
27th Jul 2025501 AMAQI
27th Jul 2025512 AMAQI
27th Jul 2025503 AMAQI

28°C22/35°C

27th Jul 2025504 AMAQI
27th Jul 2025525 AMAQI
27th Jul 2025526 AMAQI
27th Jul 2025527 AMAQI
27th Jul 2025528 AMAQI
27th Jul 2025529 AMAQI
27th Jul 20255010 AMAQI
27th Jul 20255411 AMAQI
27th Jul 20255312 PMAQI
27th Jul 2025531 PMAQI
27th Jul 2025522 PMAQI
27th Jul 2025523 PMAQI
27th Jul 2025534 PMAQI
27th Jul 2025535 PMAQI
27th Jul 2025496 PMAQI
27th Jul 2025497 PMAQI
27th Jul 2025518 PMAQI
27th Jul 2025509 PMAQI
27th Jul 20255110 PMAQI
27th Jul 20255011 PMAQI
28th Jul 20255012 AMAQI
28th Jul 2025501 AMAQI
28th Jul 2025522 AMAQI
28th Jul 2025523 AMAQI

29°C23/35°C

28th Jul 2025524 AMAQI
28th Jul 2025525 AMAQI
28th Jul 2025526 AMAQI
28th Jul 2025527 AMAQI
28th Jul 2025528 AMAQI
28th Jul 2025459 AMAQI
28th Jul 20254210 AMAQI
28th Jul 20254411 AMAQI
28th Jul 20253812 PMAQI
28th Jul 2025421 PMAQI
28th Jul 2025422 PMAQI
28th Jul 2025413 PMAQI
28th Jul 2025434 PMAQI
28th Jul 2025385 PMAQI
28th Jul 2025476 PMAQI
28th Jul 2025507 PMAQI
28th Jul 2025498 PMAQI
28th Jul 2025499 PMAQI
28th Jul 20254810 PMAQI
28th Jul 20254811 PMAQI
29th Jul 20255012 AMAQI
29th Jul 2025501 AMAQI
29th Jul 2025502 AMAQI
29th Jul 2025503 AMAQI

29°C24/36°C

29th Jul 2025504 AMAQI
29th Jul 2025495 AMAQI
29th Jul 2025506 AMAQI
29th Jul 2025507 AMAQI
29th Jul 2025498 AMAQI
29th Jul 2025499 AMAQI
29th Jul 20255210 AMAQI
29th Jul 20255311 AMAQI
29th Jul 20255412 PMAQI
29th Jul 2025521 PMAQI
29th Jul 2025522 PMAQI
29th Jul 2025533 PMAQI
29th Jul 2025534 PMAQI
29th Jul 2025505 PMAQI
29th Jul 2025496 PMAQI
29th Jul 2025387 PMAQI
29th Jul 2025408 PMAQI
29th Jul 2025439 PMAQI
29th Jul 20253810 PMAQI
29th Jul 20253811 PMAQI
30th Jul 20254012 AMAQI
30th Jul 2025441 AMAQI
30th Jul 2025502 AMAQI
30th Jul 2025513 AMAQI

28°C23/37°C

30th Jul 2025514 AMAQI
30th Jul 2025515 AMAQI
30th Jul 2025516 AMAQI
30th Jul 2025507 AMAQI
30th Jul 2025508 AMAQI
30th Jul 2025489 AMAQI
30th Jul 20253010 AMAQI
30th Jul 20252611 AMAQI
30th Jul 20252712 PMAQI
30th Jul 2025291 PMAQI
30th Jul 2025332 PMAQI
30th Jul 2025363 PMAQI
30th Jul 2025364 PMAQI
30th Jul 2025405 PMAQI
30th Jul 2025376 PMAQI
30th Jul 2025337 PMAQI
30th Jul 2025378 PMAQI
30th Jul 2025429 PMAQI
30th Jul 20254410 PMAQI
30th Jul 20254411 PMAQI
31st Jul 20254412 AMAQI
31st Jul 2025471 AMAQI
31st Jul 2025482 AMAQI
31st Jul 2025493 AMAQI

27°C22/35°C

31st Jul 2025484 AMAQI
31st Jul 2025485 AMAQI
31st Jul 2025486 AMAQI
31st Jul 2025487 AMAQI
31st Jul 2025488 AMAQI
31st Jul 2025489 AMAQI
31st Jul 20254810 AMAQI
31st Jul 20254111 AMAQI
31st Jul 20253812 PMAQI
31st Jul 2025361 PMAQI
31st Jul 2025362 PMAQI
31st Jul 2025383 PMAQI
31st Jul 2025344 PMAQI
31st Jul 2025385 PMAQI
31st Jul 2025376 PMAQI
31st Jul 2025327 PMAQI
31st Jul 2025348 PMAQI
31st Jul 2025519 PMAQI
31st Jul 20254210 PMAQI
31st Jul 20253211 PMAQI
1st Aug 20253612 AMAQI
1st Aug 2025411 AMAQI
1st Aug 2025412 AMAQI
1st Aug 2025443 AMAQI

26°C21/34°C

1st Aug 2025424 AMAQI
1st Aug 2025415 AMAQI
1st Aug 2025406 AMAQI
1st Aug 2025407 AMAQI
1st Aug 2025428 AMAQI
1st Aug 2025399 AMAQI
1st Aug 20253210 AMAQI
1st Aug 20254211 AMAQI
1st Aug 20254612 PMAQI
1st Aug 2025401 PMAQI
1st Aug 2025372 PMAQI
1st Aug 2025353 PMAQI
1st Aug 2025484 PMAQI
1st Aug 2025425 PMAQI
1st Aug 2025426 PMAQI
1st Aug 2025357 PMAQI
1st Aug 2025308 PMAQI
1st Aug 2025339 PMAQI
1st Aug 20253610 PMAQI
1st Aug 20253211 PMAQI
2nd Aug 20253312 AMAQI
2nd Aug 2025351 AMAQI
2nd Aug 2025392 AMAQI
2nd Aug 2025423 AMAQI

25°C20/30°C

2nd Aug 2025424 AMAQI
2nd Aug 2025415 AMAQI
2nd Aug 2025426 AMAQI
2nd Aug 2025407 AMAQI
2nd Aug 2025418 AMAQI
2nd Aug 2025349 AMAQI
2nd Aug 20253510 AMAQI
2nd Aug 20253211 AMAQI
2nd Aug 20253212 PMAQI
2nd Aug 2025381 PMAQI
2nd Aug 2025482 PMAQI
2nd Aug 2025473 PMAQI
2nd Aug 2025404 PMAQI
2nd Aug 2025435 PMAQI
2nd Aug 2025496 PMAQI
2nd Aug 2025497 PMAQI
2nd Aug 2025378 PMAQI
2nd Aug 2025409 PMAQI
2nd Aug 20253710 PMAQI
2nd Aug 20254311 PMAQI
3rd Aug 20253412 AMAQI
3rd Aug 2025371 AMAQI
3rd Aug 2025392 AMAQI
3rd Aug 2025393 AMAQI

29°C24/36°C

3rd Aug 2025414 AMAQI
3rd Aug 2025405 AMAQI
3rd Aug 2025396 AMAQI
3rd Aug 2025407 AMAQI
3rd Aug 2025398 AMAQI
3rd Aug 2025409 AMAQI
3rd Aug 20254510 AMAQI
3rd Aug 20254811 AMAQI
3rd Aug 20255712 PMAQI
3rd Aug 2025551 PMAQI
3rd Aug 2025542 PMAQI
3rd Aug 2025423 PMAQI
3rd Aug 2025534 PMAQI
3rd Aug 2025545 PMAQI
3rd Aug 2025566 PMAQI
3rd Aug 2025587 PMAQI
3rd Aug 2025568 PMAQI
3rd Aug 2025449 PMAQI
3rd Aug 20254310 PMAQI
3rd Aug 20254111 PMAQI
4th Aug 20253812 AMAQI
4th Aug 2025401 AMAQI
4th Aug 2025382 AMAQI
4th Aug 2025403 AMAQI

28°C23/35°C

4th Aug 2025434 AMAQI
4th Aug 2025455 AMAQI
4th Aug 2025446 AMAQI
4th Aug 2025447 AMAQI
4th Aug 2025448 AMAQI
4th Aug 2025479 AMAQI
4th Aug 20255010 AMAQI
4th Aug 20256211 AMAQI
4th Aug 20256512 PMAQI
4th Aug 2025611 PMAQI
4th Aug 2025682 PMAQI
4th Aug 2025653 PMAQI
4th Aug 2025724 PMAQI
4th Aug 2025705 PMAQI
4th Aug 2025726 PMAQI
4th Aug 2025647 PMAQI
4th Aug 2025628 PMAQI
4th Aug 2025589 PMAQI
4th Aug 20255610 PMAQI
4th Aug 20255411 PMAQI
5th Aug 20255412 AMAQI
5th Aug 2025481 AMAQI
5th Aug 2025422 AMAQI
5th Aug 2025403 AMAQI

28°C22/35°C

5th Aug 2025484 AMAQI
5th Aug 2025495 AMAQI
5th Aug 2025466 AMAQI
5th Aug 2025467 AMAQI
5th Aug 2025498 AMAQI
5th Aug 2025529 AMAQI
5th Aug 20256110 AMAQI
5th Aug 20255611 AMAQI
5th Aug 20256812 PMAQI
5th Aug 2025491 PMAQI
5th Aug 2025542 PMAQI
5th Aug 2025543 PMAQI
5th Aug 2025604 PMAQI
5th Aug 2025565 PMAQI
5th Aug 2025586 PMAQI
5th Aug 2025497 PMAQI
5th Aug 2025508 PMAQI
5th Aug 2025469 PMAQI
5th Aug 20254710 PMAQI
5th Aug 20254211 PMAQI
6th Aug 20254312 AMAQI
6th Aug 2025481 AMAQI
6th Aug 2025482 AMAQI
6th Aug 2025483 AMAQI

29°C25/36°C

6th Aug 2025514 AMAQI
6th Aug 2025505 AMAQI
6th Aug 2025516 AMAQI
6th Aug 2025517 AMAQI
6th Aug 2025508 AMAQI
6th Aug 2025379 AMAQI
6th Aug 20253010 AMAQI
6th Aug 20253611 AMAQI
6th Aug 20254012 PMAQI
6th Aug 2025351 PMAQI
6th Aug 2025432 PMAQI
6th Aug 2025403 PMAQI
6th Aug 2025384 PMAQI
6th Aug 2025475 PMAQI
6th Aug 2025366 PMAQI
6th Aug 2025467 PMAQI
6th Aug 2025528 PMAQI
6th Aug 2025489 PMAQI
6th Aug 20255010 PMAQI
6th Aug 20254811 PMAQI
7th Aug 20254612 AMAQI
7th Aug 2025471 AMAQI
7th Aug 2025462 AMAQI
7th Aug 2025463 AMAQI

27°C22/33°C

7th Aug 2025454 AMAQI
7th Aug 2025455 AMAQI
7th Aug 2025456 AMAQI
7th Aug 2025417 AMAQI
7th Aug 2025448 AMAQI
7th Aug 2025299 AMAQI
7th Aug 20253210 AMAQI
7th Aug 20254111 AMAQI
7th Aug 20252612 PMAQI
7th Aug 2025211 PMAQI
7th Aug 2025242 PMAQI
7th Aug 2025223 PMAQI
7th Aug 2025274 PMAQI
7th Aug 2025255 PMAQI
7th Aug 2025266 PMAQI
7th Aug 2025327 PMAQI
7th Aug 2025358 PMAQI
7th Aug 2025389 PMAQI
7th Aug 20253810 PMAQI
7th Aug 20253611 PMAQI
8th Aug 20253712 AMAQI
8th Aug 2025401 AMAQI
8th Aug 2025452 AMAQI
8th Aug 2025443 AMAQI

25°C21/30°C

8th Aug 2025434 AMAQI
8th Aug 2025405 AMAQI
8th Aug 2025416 AMAQI
8th Aug 2025407 AMAQI
8th Aug 2025408 AMAQI
8th Aug 2025309 AMAQI
8th Aug 20252710 AMAQI
8th Aug 20253111 AMAQI
8th Aug 20253012 PMAQI
8th Aug 2025301 PMAQI
8th Aug 2025282 PMAQI
8th Aug 2025223 PMAQI
8th Aug 2025244 PMAQI
8th Aug 2025285 PMAQI
8th Aug 2025276 PMAQI
8th Aug 2025287 PMAQI
8th Aug 2025328 PMAQI
8th Aug 2025389 PMAQI
8th Aug 20253510 PMAQI
8th Aug 20253611 PMAQI
9th Aug 20253612 AMAQI
9th Aug 2025391 AMAQI
9th Aug 2025402 AMAQI
9th Aug 2025423 AMAQI

24°C19/32°C

9th Aug 2025424 AMAQI
9th Aug 2025405 AMAQI
9th Aug 2025396 AMAQI
9th Aug 2025407 AMAQI
9th Aug 2025398 AMAQI
9th Aug 2025309 AMAQI
9th Aug 20252910 AMAQI
9th Aug 20252911 AMAQI
9th Aug 20252812 PMAQI
9th Aug 2025291 PMAQI
9th Aug 2025312 PMAQI
9th Aug 2025323 PMAQI
9th Aug 2025314 PMAQI
9th Aug 2025335 PMAQI
9th Aug 2025346 PMAQI
9th Aug 2025357 PMAQI
9th Aug 2025388 PMAQI
9th Aug 2025409 PMAQI
9th Aug 20254010 PMAQI
9th Aug 20254011 PMAQI
10th Aug 20253812 AMAQI
10th Aug 2025381 AMAQI
10th Aug 2025382 AMAQI
10th Aug 2025413 AMAQI

24°C18/31°C

10th Aug 2025404 AMAQI
10th Aug 2025375 AMAQI
10th Aug 2025386 AMAQI
10th Aug 2025367 AMAQI
10th Aug 2025378 AMAQI
10th Aug 2025359 AMAQI
10th Aug 20253610 AMAQI
10th Aug 20254011 AMAQI
10th Aug 20254212 PMAQI
10th Aug 2025421 PMAQI
10th Aug 2025422 PMAQI
10th Aug 2025423 PMAQI
10th Aug 2025404 PMAQI
10th Aug 2025395 PMAQI
10th Aug 2025406 PMAQI
10th Aug 2025397 PMAQI
10th Aug 2025368 PMAQI
10th Aug 2025379 PMAQI
10th Aug 20253710 PMAQI
10th Aug 20253611 PMAQI
11th Aug 20253812 AMAQI
11th Aug 2025381 AMAQI

--°C/°C

4 AM
11 AM
6 PM
11 PM
3 AM

--°C/°C

Day time
Avg. Highest Time
4 AM - 8 AM

46AQI

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

40AQI

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. 46), while the lowest AQI was between 9 AM to 10 AM (Avg. 40).
Night time
Avg. Highest Time
12 AM - 3 AM

45AQI

4 hours / Day
120 hours / Month
Avg. Lowest Time
7 PM - 8 PM

42AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 3 AM (Avg. 45), while the lowest AQI was between 7 PM to 8 PM (Avg. 42).

2025 Days Vs Air Quality

Otawara, Tochigi, Japan

2025

85%

188

15%

33

Total number of days with different AQI categories in last 222 days in 2025 (143 days remaining)

Good
188 Days
Moderate
33 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 85%

Health Risk Level:

Low

In 2025, 85% of 222 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

Otawara, Tochigi, 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
30AQI
2nd January 2025
29AQI
3rd January 2025
27AQI
4th January 2025
28AQI
5th January 2025
26AQI
6th January 2025
40AQI
7th January 2025
27AQI
8th January 2025
30AQI
9th January 2025
27AQI
10th January 2025
26AQI
11th January 2025
25AQI
12th January 2025
30AQI
13th January 2025
34AQI
14th January 2025
30AQI
15th January 2025
28AQI
16th January 2025
26AQI
17th January 2025
27AQI
18th January 2025
27AQI
19th January 2025
38AQI
20th January 2025
39AQI
21st January 2025
40AQI
22nd January 2025
38AQI
23rd January 2025
39AQI
24th January 2025
38AQI
25th January 2025
33AQI
26th January 2025
31AQI
27th January 2025
30AQI
28th January 2025
34AQI
29th January 2025
29AQI
30th January 2025
29AQI
31st January 2025
30AQI
1st February 2025
29AQI
2nd February 2025
35AQI
3rd February 2025
35AQI
4th February 2025
33AQI
5th February 2025
31AQI
6th February 2025
30AQI
7th February 2025
29AQI
8th February 2025
31AQI
9th February 2025
29AQI
10th February 2025
29AQI
11th February 2025
32AQI
12th February 2025
31AQI
13th February 2025
33AQI
14th February 2025
30AQI
15th February 2025
31AQI
16th February 2025
41AQI
17th February 2025
36AQI
18th February 2025
35AQI
19th February 2025
32AQI
20th February 2025
32AQI
21st February 2025
32AQI
22nd February 2025
32AQI
23rd February 2025
33AQI
24th February 2025
34AQI
25th February 2025
34AQI
26th February 2025
37AQI
27th February 2025
39AQI
28th February 2025
47AQI
1st March 2025
49AQI
2nd March 2025
54AQI
3rd March 2025
40AQI
4th March 2025
39AQI
5th March 2025
30AQI
6th March 2025
34AQI
7th March 2025
34AQI
8th March 2025
36AQI
9th March 2025
35AQI
10th March 2025
38AQI
11th March 2025
43AQI
12th March 2025
43AQI
13th March 2025
46AQI
14th March 2025
34AQI
15th March 2025
36AQI
16th March 2025
22AQI
17th March 2025
20AQI
18th March 2025
24AQI
19th March 2025
18AQI
20th March 2025
25AQI
21st March 2025
37AQI
22nd March 2025
47AQI
23rd March 2025
52AQI
24th March 2025
51AQI
25th March 2025
67AQI
26th March 2025
64AQI
27th March 2025
67AQI
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
18AQI
4th April 2025
19AQI
5th April 2025
27AQI
6th April 2025
25AQI
7th April 2025
27AQI
8th April 2025
37AQI
9th April 2025
27AQI
10th April 2025
43AQI
11th April 2025
39AQI
12th April 2025
41AQI
13th April 2025
26AQI
14th April 2025
23AQI
15th April 2025
25AQI
16th April 2025
22AQI
17th April 2025
41AQI
18th April 2025
50AQI
19th April 2025
62AQI
20th April 2025
62AQI
21st April 2025
43AQI
22nd April 2025
53AQI
23rd April 2025
30AQI
24th April 2025
32AQI
25th April 2025
34AQI
26th April 2025
46AQI
27th April 2025
46AQI
28th April 2025
52AQI
29th April 2025
34AQI
30th April 2025
37AQI
1st May 2025
41AQI
2nd May 2025
26AQI
3rd May 2025
33AQI
4th May 2025
30AQI
5th May 2025
34AQI
6th May 2025
30AQI
7th May 2025
25AQI
8th May 2025
30AQI
9th May 2025
35AQI
10th May 2025
20AQI
11th May 2025
23AQI
12th May 2025
23AQI
13th May 2025
35AQI
14th May 2025
41AQI
15th May 2025
44AQI
16th May 2025
51AQI
17th May 2025
33AQI
18th May 2025
42AQI
19th May 2025
44AQI
20th May 2025
55AQI
21st May 2025
65AQI
22nd May 2025
53AQI
23rd May 2025
47AQI
24th May 2025
43AQI
25th May 2025
29AQI
26th May 2025
31AQI
27th May 2025
31AQI
28th May 2025
30AQI
29th May 2025
34AQI
30th May 2025
29AQI
31st May 2025
22AQI
1st June 2025
22AQI
2nd June 2025
37AQI
3rd June 2025
36AQI
4th June 2025
34AQI
5th June 2025
37AQI
6th June 2025
48AQI
7th June 2025
54AQI
8th June 2025
62AQI
9th June 2025
58AQI
10th June 2025
47AQI
11th June 2025
37AQI
12th June 2025
43AQI
13th June 2025
44AQI
14th June 2025
42AQI
15th June 2025
29AQI
16th June 2025
37AQI
17th June 2025
39AQI
18th June 2025
42AQI
19th June 2025
44AQI
20th June 2025
44AQI
21st June 2025
46AQI
22nd June 2025
49AQI
23rd June 2025
45AQI
24th June 2025
44AQI
25th June 2025
37AQI
26th June 2025
35AQI
27th June 2025
41AQI
28th June 2025
40AQI
29th June 2025
45AQI
30th June 2025
51AQI
1st July 2025
52AQI
2nd July 2025
54AQI
3rd July 2025
56AQI
4th July 2025
54AQI
5th July 2025
56AQI
6th July 2025
57AQI
7th July 2025
66AQI
8th July 2025
72AQI
9th July 2025
74AQI
10th July 2025
59AQI
11th July 2025
46AQI
12th July 2025
46AQI
13th July 2025
50AQI
14th July 2025
38AQI
15th July 2025
37AQI
16th July 2025
42AQI
17th July 2025
37AQI
18th July 2025
38AQI
19th July 2025
38AQI
20th July 2025
41AQI
21st July 2025
43AQI
22nd July 2025
46AQI
23rd July 2025
47AQI
24th July 2025
51AQI
25th July 2025
51AQI
26th July 2025
51AQI
27th July 2025
51AQI
28th July 2025
47AQI
29th July 2025
48AQI
30th July 2025
42AQI
31st July 2025
42AQI
1st August 2025
39AQI
2nd August 2025
40AQI
3rd August 2025
45AQI
4th August 2025
54AQI
5th August 2025
50AQI
6th August 2025
45AQI
7th August 2025
36AQI
8th August 2025
35AQI
9th August 2025
36AQI

31AQI

33AQI

40AQI

36AQI

36AQI

42AQI

49AQI

42AQI

No. of days

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

202538AQI

31
28
25
6
26
4
27
4
26
4
17
14
8
1
188
33

Highest AQI recorded in

July

49AQI

Lowest AQI recorded in

January

31AQI

202433AQI

16
2
5
2
1
12
28
2
26
5
31
26
3
31
29
1
31
239
12

Highest AQI recorded in

July

44AQI

Lowest AQI recorded in

January

18AQI

202322AQI

3
31
34

Highest AQI recorded in

December

22AQI

Lowest AQI recorded in

November

17AQI

202237AQI

31
21
25
6
21
9
26
5
20
10
19
3
1
29
29
2
11
1
233
36

Highest AQI recorded in

April

45AQI

Lowest AQI recorded in

October

30AQI

202131AQI

29
2
25
3
29
21
28
3
25
5
27
4
29
2
30
30
1
28
2
31
332
22

Highest AQI recorded in

June

40AQI

Lowest AQI recorded in

January

25AQI

202029AQI

12
1
21
18
26
4
30
1
17
14
19
30
1
24
6
31
228
27

Highest AQI recorded in

August

49AQI

Lowest AQI recorded in

December

20AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2025(Avg.)
38AQI
Least Polluted Year Recorded
2023(Avg.)
22AQI

Otawara's annual 2025 AQI (38) shows an average percentage change of 30.1% (worsened AQI) compared to previous years: 2020 (29), 2021 (31), 2022 (37), 2023 (22), 2024 (33).