Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Ichihara, Chiba, 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

Ichihara, Chiba, Japan

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
3rd Aug 2022
156AQI
Lowest AQI recorded on
21st Aug 2023
15AQI

Same Day Analysis (20th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 47 of Good air quality on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 20th Aug - 21st Aug 2025

Ichihara, Chiba, Japan

AQI
Day
Night
.

4 AM20th Aug 2025

6 PM

3 AM21st Aug 2025

Day time
Avg. Highest Time
12PM20th Aug

60AQI

Avg. Lowest Time
8AM20th Aug

43AQI

Night time
Avg. Highest Time
7PM20th Aug

54AQI

Avg. Lowest Time
3AM21st Aug

42AQI

In the last 24 hours,

Ichihara's AQI reached its highest point of 60 at 12 PM during the Day, while the lowest point, 42, was recorded at 3 AM during the Night between 20th Aug and 21st Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Ichihara, Chiba, Japan

JulAug
22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st
Day
Night
22nd Jul 2025384 AMAQI
22nd Jul 2025365 AMAQI
22nd Jul 2025366 AMAQI
22nd Jul 2025377 AMAQI
22nd Jul 2025378 AMAQI
22nd Jul 2025269 AMAQI
22nd Jul 20252310 AMAQI
22nd Jul 20252611 AMAQI
22nd Jul 20253012 PMAQI
22nd Jul 2025351 PMAQI
22nd Jul 2025342 PMAQI
22nd Jul 2025333 PMAQI
22nd Jul 2025324 PMAQI
22nd Jul 2025295 PMAQI
22nd Jul 2025236 PMAQI
22nd Jul 2025187 PMAQI
22nd Jul 2025218 PMAQI
22nd Jul 2025279 PMAQI
22nd Jul 20252810 PMAQI
22nd Jul 20252711 PMAQI
23rd Jul 20252812 AMAQI
23rd Jul 2025311 AMAQI
23rd Jul 2025362 AMAQI
23rd Jul 2025363 AMAQI

28°C26/31°C

23rd Jul 2025364 AMAQI
23rd Jul 2025355 AMAQI
23rd Jul 2025356 AMAQI
23rd Jul 2025357 AMAQI
23rd Jul 2025358 AMAQI
23rd Jul 2025269 AMAQI
23rd Jul 20252310 AMAQI
23rd Jul 20252811 AMAQI
23rd Jul 20253212 PMAQI
23rd Jul 2025311 PMAQI
23rd Jul 2025312 PMAQI
23rd Jul 2025333 PMAQI
23rd Jul 2025304 PMAQI
23rd Jul 2025315 PMAQI
23rd Jul 2025296 PMAQI
23rd Jul 2025207 PMAQI
23rd Jul 2025238 PMAQI
23rd Jul 2025289 PMAQI
23rd Jul 20252710 PMAQI
23rd Jul 20252811 PMAQI
24th Jul 20252912 AMAQI
24th Jul 2025331 AMAQI
24th Jul 2025342 AMAQI
24th Jul 2025343 AMAQI

28°C26/31°C

24th Jul 2025344 AMAQI
24th Jul 2025345 AMAQI
24th Jul 2025336 AMAQI
24th Jul 2025347 AMAQI
24th Jul 2025338 AMAQI
24th Jul 2025379 AMAQI
24th Jul 20254510 AMAQI
24th Jul 20255111 AMAQI
24th Jul 20255712 PMAQI
24th Jul 2025571 PMAQI
24th Jul 2025522 PMAQI
24th Jul 2025433 PMAQI
24th Jul 2025314 PMAQI
24th Jul 2025255 PMAQI
24th Jul 2025216 PMAQI
24th Jul 2025187 PMAQI
24th Jul 2025218 PMAQI
24th Jul 2025249 PMAQI
24th Jul 20252610 PMAQI
24th Jul 20252711 PMAQI
25th Jul 20252812 AMAQI
25th Jul 2025311 AMAQI
25th Jul 2025332 AMAQI
25th Jul 2025333 AMAQI

28°C25/32°C

25th Jul 2025344 AMAQI
25th Jul 2025375 AMAQI
25th Jul 2025376 AMAQI
25th Jul 2025377 AMAQI
25th Jul 2025378 AMAQI
25th Jul 2025279 AMAQI
25th Jul 20252810 AMAQI
25th Jul 20252711 AMAQI
25th Jul 20252812 PMAQI
25th Jul 2025251 PMAQI
25th Jul 2025232 PMAQI
25th Jul 2025203 PMAQI
25th Jul 2025224 PMAQI
25th Jul 2025185 PMAQI
25th Jul 2025176 PMAQI
25th Jul 2025167 PMAQI
25th Jul 2025208 PMAQI
25th Jul 2025269 PMAQI
25th Jul 20252710 PMAQI
25th Jul 20252611 PMAQI
26th Jul 20252612 AMAQI
26th Jul 2025321 AMAQI
26th Jul 2025342 AMAQI
26th Jul 2025333 AMAQI

28°C26/31°C

26th Jul 2025334 AMAQI
26th Jul 2025335 AMAQI
26th Jul 2025336 AMAQI
26th Jul 2025337 AMAQI
26th Jul 2025328 AMAQI
26th Jul 2025249 AMAQI
26th Jul 20252110 AMAQI
26th Jul 20252511 AMAQI
26th Jul 20252612 PMAQI
26th Jul 2025221 PMAQI
26th Jul 2025212 PMAQI
26th Jul 2025223 PMAQI
26th Jul 2025204 PMAQI
26th Jul 2025205 PMAQI
26th Jul 2025196 PMAQI
26th Jul 2025187 PMAQI
26th Jul 2025218 PMAQI
26th Jul 2025269 PMAQI
26th Jul 20252710 PMAQI
26th Jul 20252611 PMAQI
27th Jul 20252512 AMAQI
27th Jul 2025301 AMAQI
27th Jul 2025322 AMAQI
27th Jul 2025323 AMAQI

29°C26/32°C

27th Jul 2025314 AMAQI
27th Jul 2025305 AMAQI
27th Jul 2025306 AMAQI
27th Jul 2025307 AMAQI
27th Jul 2025308 AMAQI
27th Jul 2025259 AMAQI
27th Jul 20252010 AMAQI
27th Jul 20252111 AMAQI
27th Jul 20251812 PMAQI
27th Jul 2025211 PMAQI
27th Jul 2025212 PMAQI
27th Jul 2025213 PMAQI
27th Jul 2025214 PMAQI
27th Jul 2025205 PMAQI
27th Jul 2025176 PMAQI
27th Jul 2025167 PMAQI
27th Jul 2025208 PMAQI
27th Jul 2025259 PMAQI
27th Jul 20252510 PMAQI
27th Jul 20252411 PMAQI
28th Jul 20252412 AMAQI
28th Jul 2025271 AMAQI
28th Jul 2025302 AMAQI
28th Jul 2025303 AMAQI

28°C26/31°C

28th Jul 2025304 AMAQI
28th Jul 2025295 AMAQI
28th Jul 2025296 AMAQI
28th Jul 2025297 AMAQI
28th Jul 2025298 AMAQI
28th Jul 2025289 AMAQI
28th Jul 20253110 AMAQI
28th Jul 20253211 AMAQI
28th Jul 20254312 PMAQI
28th Jul 2025531 PMAQI
28th Jul 2025502 PMAQI
28th Jul 2025453 PMAQI
28th Jul 2025384 PMAQI
28th Jul 2025295 PMAQI
28th Jul 2025246 PMAQI
28th Jul 2025207 PMAQI
28th Jul 2025258 PMAQI
28th Jul 2025269 PMAQI
28th Jul 20252310 PMAQI
28th Jul 20252411 PMAQI
29th Jul 20252412 AMAQI
29th Jul 2025271 AMAQI
29th Jul 2025292 AMAQI
29th Jul 2025293 AMAQI

28°C26/31°C

29th Jul 2025304 AMAQI
29th Jul 2025325 AMAQI
29th Jul 2025316 AMAQI
29th Jul 2025317 AMAQI
29th Jul 2025318 AMAQI
29th Jul 2025319 AMAQI
29th Jul 20253010 AMAQI
29th Jul 20253111 AMAQI
29th Jul 20253412 PMAQI
29th Jul 2025341 PMAQI
29th Jul 2025312 PMAQI
29th Jul 2025253 PMAQI
29th Jul 2025234 PMAQI
29th Jul 2025215 PMAQI
29th Jul 2025196 PMAQI
29th Jul 2025197 PMAQI
29th Jul 2025198 PMAQI
29th Jul 2025239 PMAQI
29th Jul 20252310 PMAQI
29th Jul 20252311 PMAQI
30th Jul 20252612 AMAQI
30th Jul 2025291 AMAQI
30th Jul 2025292 AMAQI
30th Jul 2025293 AMAQI

28°C25/33°C

30th Jul 2025304 AMAQI
30th Jul 2025305 AMAQI
30th Jul 2025306 AMAQI
30th Jul 2025307 AMAQI
30th Jul 2025308 AMAQI
30th Jul 2025239 AMAQI
30th Jul 20252010 AMAQI
30th Jul 20252111 AMAQI
30th Jul 20252212 PMAQI
30th Jul 2025241 PMAQI
30th Jul 2025232 PMAQI
30th Jul 2025253 PMAQI
30th Jul 2025284 PMAQI
30th Jul 2025315 PMAQI
30th Jul 2025296 PMAQI
30th Jul 2025317 PMAQI
30th Jul 2025338 PMAQI
30th Jul 2025329 PMAQI
30th Jul 20253410 PMAQI
30th Jul 20253211 PMAQI
31st Jul 20253312 AMAQI
31st Jul 2025301 AMAQI
31st Jul 2025292 AMAQI
31st Jul 2025293 AMAQI

28°C25/33°C

31st Jul 2025294 AMAQI
31st Jul 2025295 AMAQI
31st Jul 2025296 AMAQI
31st Jul 2025297 AMAQI
31st Jul 2025298 AMAQI
31st Jul 2025299 AMAQI
31st Jul 20252910 AMAQI
31st Jul 20253211 AMAQI
31st Jul 20253112 PMAQI
31st Jul 2025291 PMAQI
31st Jul 2025292 PMAQI
31st Jul 2025283 PMAQI
31st Jul 2025264 PMAQI
31st Jul 2025255 PMAQI
31st Jul 2025276 PMAQI
31st Jul 2025297 PMAQI
31st Jul 2025298 PMAQI
31st Jul 2025299 PMAQI
31st Jul 20253010 PMAQI
31st Jul 20252711 PMAQI
1st Aug 20252712 AMAQI
1st Aug 2025311 AMAQI
1st Aug 2025352 AMAQI
1st Aug 2025363 AMAQI

27°C24/31°C

1st Aug 2025354 AMAQI
1st Aug 2025355 AMAQI
1st Aug 2025376 AMAQI
1st Aug 2025367 AMAQI
1st Aug 2025378 AMAQI
1st Aug 2025349 AMAQI
1st Aug 20252910 AMAQI
1st Aug 20254011 AMAQI
1st Aug 20254212 PMAQI
1st Aug 2025351 PMAQI
1st Aug 2025352 PMAQI
1st Aug 2025313 PMAQI
1st Aug 2025434 PMAQI
1st Aug 2025335 PMAQI
1st Aug 2025426 PMAQI
1st Aug 2025247 PMAQI
1st Aug 2025308 PMAQI
1st Aug 2025289 PMAQI
1st Aug 20253010 PMAQI
1st Aug 20252711 PMAQI
2nd Aug 20252812 AMAQI
2nd Aug 2025311 AMAQI
2nd Aug 2025362 AMAQI
2nd Aug 2025373 AMAQI

27°C25/30°C

2nd Aug 2025374 AMAQI
2nd Aug 2025385 AMAQI
2nd Aug 2025396 AMAQI
2nd Aug 2025387 AMAQI
2nd Aug 2025388 AMAQI
2nd Aug 2025329 AMAQI
2nd Aug 20253410 AMAQI
2nd Aug 20254011 AMAQI
2nd Aug 20254012 PMAQI
2nd Aug 2025461 PMAQI
2nd Aug 2025562 PMAQI
2nd Aug 2025563 PMAQI
2nd Aug 2025534 PMAQI
2nd Aug 2025525 PMAQI
2nd Aug 2025566 PMAQI
2nd Aug 2025537 PMAQI
2nd Aug 2025388 PMAQI
2nd Aug 2025369 PMAQI
2nd Aug 20253510 PMAQI
2nd Aug 20253911 PMAQI
3rd Aug 20253412 AMAQI
3rd Aug 2025361 AMAQI
3rd Aug 2025372 AMAQI
3rd Aug 2025373 AMAQI

28°C25/33°C

3rd Aug 2025404 AMAQI
3rd Aug 2025395 AMAQI
3rd Aug 2025396 AMAQI
3rd Aug 2025407 AMAQI
3rd Aug 2025388 AMAQI
3rd Aug 2025449 AMAQI
3rd Aug 20255110 AMAQI
3rd Aug 20254911 AMAQI
3rd Aug 20256112 PMAQI
3rd Aug 2025511 PMAQI
3rd Aug 2025572 PMAQI
3rd Aug 2025483 PMAQI
3rd Aug 2025494 PMAQI
3rd Aug 2025485 PMAQI
3rd Aug 2025506 PMAQI
3rd Aug 2025447 PMAQI
3rd Aug 2025468 PMAQI
3rd Aug 2025419 PMAQI
3rd Aug 20254410 PMAQI
3rd Aug 20254111 PMAQI
4th Aug 20254012 AMAQI
4th Aug 2025381 AMAQI
4th Aug 2025382 AMAQI
4th Aug 2025393 AMAQI

29°C26/33°C

4th Aug 2025414 AMAQI
4th Aug 2025435 AMAQI
4th Aug 2025426 AMAQI
4th Aug 2025437 AMAQI
4th Aug 2025438 AMAQI
4th Aug 2025619 AMAQI
4th Aug 20257410 AMAQI
4th Aug 20258211 AMAQI
4th Aug 20258312 PMAQI
4th Aug 2025901 PMAQI
4th Aug 2025952 PMAQI
4th Aug 2025873 PMAQI
4th Aug 2025884 PMAQI
4th Aug 2025935 PMAQI
4th Aug 2025856 PMAQI
4th Aug 2025767 PMAQI
4th Aug 2025708 PMAQI
4th Aug 2025589 PMAQI
4th Aug 20255510 PMAQI
4th Aug 20254811 PMAQI
5th Aug 20254812 AMAQI
5th Aug 2025441 AMAQI
5th Aug 2025412 AMAQI
5th Aug 2025403 AMAQI

29°C27/32°C

5th Aug 2025504 AMAQI
5th Aug 2025545 AMAQI
5th Aug 2025536 AMAQI
5th Aug 2025517 AMAQI
5th Aug 2025548 AMAQI
5th Aug 2025559 AMAQI
5th Aug 20256010 AMAQI
5th Aug 20256011 AMAQI
5th Aug 20256012 PMAQI
5th Aug 2025561 PMAQI
5th Aug 2025522 PMAQI
5th Aug 2025533 PMAQI
5th Aug 2025544 PMAQI
5th Aug 2025525 PMAQI
5th Aug 2025496 PMAQI
5th Aug 2025487 PMAQI
5th Aug 2025488 PMAQI
5th Aug 2025489 PMAQI
5th Aug 20254810 PMAQI
5th Aug 20254711 PMAQI
6th Aug 20254512 AMAQI
6th Aug 2025481 AMAQI
6th Aug 2025492 AMAQI
6th Aug 2025493 AMAQI

29°C27/32°C

6th Aug 2025524 AMAQI
6th Aug 2025525 AMAQI
6th Aug 2025526 AMAQI
6th Aug 2025527 AMAQI
6th Aug 2025528 AMAQI
6th Aug 2025499 AMAQI
6th Aug 20254610 AMAQI
6th Aug 20254811 AMAQI
6th Aug 20255712 PMAQI
6th Aug 2025541 PMAQI
6th Aug 2025562 PMAQI
6th Aug 2025503 PMAQI
6th Aug 2025544 PMAQI
6th Aug 2025585 PMAQI
6th Aug 2025556 PMAQI
6th Aug 2025577 PMAQI
6th Aug 2025548 PMAQI
6th Aug 2025479 PMAQI
6th Aug 20255010 PMAQI
6th Aug 20254611 PMAQI
7th Aug 20254712 AMAQI
7th Aug 2025481 AMAQI
7th Aug 2025512 AMAQI
7th Aug 2025493 AMAQI

30°C27/33°C

7th Aug 2025514 AMAQI
7th Aug 2025515 AMAQI
7th Aug 2025516 AMAQI
7th Aug 2025447 AMAQI
7th Aug 2025508 AMAQI
7th Aug 2025499 AMAQI
7th Aug 20254710 AMAQI
7th Aug 20254611 AMAQI
7th Aug 20253012 PMAQI
7th Aug 2025321 PMAQI
7th Aug 2025462 PMAQI
7th Aug 2025613 PMAQI
7th Aug 2025574 PMAQI
7th Aug 2025545 PMAQI
7th Aug 2025506 PMAQI
7th Aug 2025497 PMAQI
7th Aug 2025508 PMAQI
7th Aug 2025529 PMAQI
7th Aug 20255210 PMAQI
7th Aug 20255211 PMAQI
8th Aug 20255212 AMAQI
8th Aug 2025511 AMAQI
8th Aug 2025502 AMAQI
8th Aug 2025503 AMAQI

30°C28/32°C

8th Aug 2025494 AMAQI
8th Aug 2025495 AMAQI
8th Aug 2025496 AMAQI
8th Aug 2025497 AMAQI
8th Aug 2025498 AMAQI
8th Aug 2025419 AMAQI
8th Aug 20253710 AMAQI
8th Aug 20253511 AMAQI
8th Aug 20254412 PMAQI
8th Aug 2025521 PMAQI
8th Aug 2025512 PMAQI
8th Aug 2025523 PMAQI
8th Aug 2025474 PMAQI
8th Aug 2025365 PMAQI
8th Aug 2025406 PMAQI
8th Aug 2025417 PMAQI
8th Aug 2025438 PMAQI
8th Aug 2025489 PMAQI
8th Aug 20254910 PMAQI
8th Aug 20254711 PMAQI
9th Aug 20254612 AMAQI
9th Aug 2025501 AMAQI
9th Aug 2025512 AMAQI
9th Aug 2025513 AMAQI

28°C24/31°C

9th Aug 2025514 AMAQI
9th Aug 2025505 AMAQI
9th Aug 2025506 AMAQI
9th Aug 2025507 AMAQI
9th Aug 2025508 AMAQI
9th Aug 2025399 AMAQI
9th Aug 20253710 AMAQI
9th Aug 20253711 AMAQI
9th Aug 20253612 PMAQI
9th Aug 2025451 PMAQI
9th Aug 2025422 PMAQI
9th Aug 2025463 PMAQI
9th Aug 2025524 PMAQI
9th Aug 2025535 PMAQI
9th Aug 2025506 PMAQI
9th Aug 2025487 PMAQI
9th Aug 2025508 PMAQI
9th Aug 2025529 PMAQI
9th Aug 20255210 PMAQI
9th Aug 20255411 PMAQI
10th Aug 20255212 AMAQI
10th Aug 2025501 AMAQI
10th Aug 2025502 AMAQI
10th Aug 2025493 AMAQI

27°C25/31°C

10th Aug 2025494 AMAQI
10th Aug 2025485 AMAQI
10th Aug 2025486 AMAQI
10th Aug 2025487 AMAQI
10th Aug 2025488 AMAQI
10th Aug 2025399 AMAQI
10th Aug 20253010 AMAQI
10th Aug 20252311 AMAQI
10th Aug 20252112 PMAQI
10th Aug 2025261 PMAQI
10th Aug 2025272 PMAQI
10th Aug 2025253 PMAQI
10th Aug 2025234 PMAQI
10th Aug 2025245 PMAQI
10th Aug 2025266 PMAQI
10th Aug 2025277 PMAQI
10th Aug 2025328 PMAQI
10th Aug 2025409 PMAQI
10th Aug 20254010 PMAQI
10th Aug 20254111 PMAQI
11th Aug 20254312 AMAQI
11th Aug 2025491 AMAQI
11th Aug 2025502 AMAQI
11th Aug 2025503 AMAQI

27°C25/28°C

11th Aug 2025504 AMAQI
11th Aug 2025465 AMAQI
11th Aug 2025466 AMAQI
11th Aug 2025477 AMAQI
11th Aug 2025468 AMAQI
11th Aug 2025279 AMAQI
11th Aug 20252310 AMAQI
11th Aug 20252111 AMAQI
11th Aug 20252212 PMAQI
11th Aug 2025231 PMAQI
11th Aug 2025232 PMAQI
11th Aug 2025313 PMAQI
11th Aug 2025334 PMAQI
11th Aug 2025515 PMAQI
11th Aug 2025436 PMAQI
11th Aug 2025347 PMAQI
11th Aug 2025348 PMAQI
11th Aug 2025339 PMAQI
11th Aug 20253410 PMAQI
11th Aug 20253311 PMAQI
12th Aug 20253712 AMAQI
12th Aug 2025441 AMAQI
12th Aug 2025462 AMAQI
12th Aug 2025443 AMAQI

27°C26/29°C

12th Aug 2025424 AMAQI
12th Aug 2025405 AMAQI
12th Aug 2025396 AMAQI
12th Aug 2025407 AMAQI
12th Aug 2025418 AMAQI
12th Aug 2025279 AMAQI
12th Aug 20253110 AMAQI
12th Aug 20253911 AMAQI
12th Aug 20253312 PMAQI
12th Aug 2025361 PMAQI
12th Aug 2025312 PMAQI
12th Aug 2025273 PMAQI
12th Aug 2025324 PMAQI
12th Aug 2025295 PMAQI
12th Aug 2025326 PMAQI
12th Aug 2025307 PMAQI
12th Aug 2025338 PMAQI
12th Aug 2025359 PMAQI
12th Aug 20253110 PMAQI
12th Aug 20253311 PMAQI
13th Aug 20253412 AMAQI
13th Aug 2025381 AMAQI
13th Aug 2025402 AMAQI
13th Aug 2025403 AMAQI

28°C27/29°C

13th Aug 2025384 AMAQI
13th Aug 2025375 AMAQI
13th Aug 2025386 AMAQI
13th Aug 2025387 AMAQI
13th Aug 2025378 AMAQI
13th Aug 2025259 AMAQI
13th Aug 20252610 AMAQI
13th Aug 20253111 AMAQI
13th Aug 20253012 PMAQI
13th Aug 2025321 PMAQI
13th Aug 2025332 PMAQI
13th Aug 2025413 PMAQI
13th Aug 2025364 PMAQI
13th Aug 2025375 PMAQI
13th Aug 2025286 PMAQI
13th Aug 2025287 PMAQI
13th Aug 2025328 PMAQI
13th Aug 2025329 PMAQI
13th Aug 20253310 PMAQI
13th Aug 20253411 PMAQI
14th Aug 20253112 AMAQI
14th Aug 2025371 AMAQI
14th Aug 2025362 AMAQI
14th Aug 2025383 AMAQI

27°C25/30°C

14th Aug 2025374 AMAQI
14th Aug 2025355 AMAQI
14th Aug 2025366 AMAQI
14th Aug 2025357 AMAQI
14th Aug 2025358 AMAQI
14th Aug 2025339 AMAQI
14th Aug 20253910 AMAQI
14th Aug 20254711 AMAQI
14th Aug 20254112 PMAQI
14th Aug 2025461 PMAQI
14th Aug 2025502 PMAQI
14th Aug 2025533 PMAQI
14th Aug 2025514 PMAQI
14th Aug 2025495 PMAQI
14th Aug 2025466 PMAQI
14th Aug 2025487 PMAQI
14th Aug 2025388 PMAQI
14th Aug 2025369 PMAQI
14th Aug 20253510 PMAQI
14th Aug 20253411 PMAQI
15th Aug 20253412 AMAQI
15th Aug 2025361 AMAQI
15th Aug 2025332 AMAQI
15th Aug 2025343 AMAQI

27°C24/30°C

15th Aug 2025374 AMAQI
15th Aug 2025395 AMAQI
15th Aug 2025386 AMAQI
15th Aug 2025387 AMAQI
15th Aug 2025388 AMAQI
15th Aug 2025309 AMAQI
15th Aug 20253410 AMAQI
15th Aug 20253711 AMAQI
15th Aug 20254712 PMAQI
15th Aug 2025441 PMAQI
15th Aug 2025342 PMAQI
15th Aug 2025313 PMAQI
15th Aug 2025334 PMAQI
15th Aug 2025385 PMAQI
15th Aug 2025406 PMAQI
15th Aug 2025457 PMAQI
15th Aug 2025408 PMAQI
15th Aug 2025369 PMAQI
15th Aug 20253810 PMAQI
15th Aug 20253511 PMAQI
16th Aug 20253412 AMAQI
16th Aug 2025361 AMAQI
16th Aug 2025352 AMAQI
16th Aug 2025353 AMAQI

27°C25/30°C

16th Aug 2025374 AMAQI
16th Aug 2025375 AMAQI
16th Aug 2025386 AMAQI
16th Aug 2025397 AMAQI
16th Aug 2025378 AMAQI
16th Aug 2025319 AMAQI
16th Aug 20253810 AMAQI
16th Aug 20254111 AMAQI
16th Aug 20254512 PMAQI
16th Aug 2025591 PMAQI
16th Aug 2025572 PMAQI
16th Aug 2025513 PMAQI
16th Aug 2025464 PMAQI
16th Aug 2025445 PMAQI
16th Aug 2025406 PMAQI
16th Aug 2025377 PMAQI
16th Aug 2025388 PMAQI
16th Aug 2025389 PMAQI
16th Aug 20253810 PMAQI
16th Aug 20253811 PMAQI
17th Aug 20254012 AMAQI
17th Aug 2025371 AMAQI
17th Aug 2025362 AMAQI
17th Aug 2025363 AMAQI

28°C26/31°C

17th Aug 2025374 AMAQI
17th Aug 2025385 AMAQI
17th Aug 2025386 AMAQI
17th Aug 2025377 AMAQI
17th Aug 2025378 AMAQI
17th Aug 2025369 AMAQI
17th Aug 20253910 AMAQI
17th Aug 20254011 AMAQI
17th Aug 20255212 PMAQI
17th Aug 2025511 PMAQI
17th Aug 2025542 PMAQI
17th Aug 2025453 PMAQI
17th Aug 2025474 PMAQI
17th Aug 2025475 PMAQI
17th Aug 2025386 PMAQI
17th Aug 2025377 PMAQI
17th Aug 2025368 PMAQI
17th Aug 2025349 PMAQI
17th Aug 20253610 PMAQI
17th Aug 20253711 PMAQI
18th Aug 20253512 AMAQI
18th Aug 2025381 AMAQI
18th Aug 2025382 AMAQI
18th Aug 2025383 AMAQI

28°C26/30°C

18th Aug 2025384 AMAQI
18th Aug 2025405 AMAQI
18th Aug 2025416 AMAQI
18th Aug 2025417 AMAQI
18th Aug 2025408 AMAQI
18th Aug 2025389 AMAQI
18th Aug 20254210 AMAQI
18th Aug 20254111 AMAQI
18th Aug 20254912 PMAQI
18th Aug 2025481 PMAQI
18th Aug 2025512 PMAQI
18th Aug 2025543 PMAQI
18th Aug 2025564 PMAQI
18th Aug 2025565 PMAQI
18th Aug 2025516 PMAQI
18th Aug 2025517 PMAQI
18th Aug 2025478 PMAQI
18th Aug 2025489 PMAQI
18th Aug 20254510 PMAQI
18th Aug 20254411 PMAQI
19th Aug 20254012 AMAQI
19th Aug 2025391 AMAQI
19th Aug 2025402 AMAQI
19th Aug 2025383 AMAQI

28°C26/32°C

19th Aug 2025404 AMAQI
19th Aug 2025415 AMAQI
19th Aug 2025416 AMAQI
19th Aug 2025417 AMAQI
19th Aug 2025418 AMAQI
19th Aug 2025489 AMAQI
19th Aug 20255210 AMAQI
19th Aug 20255411 AMAQI
19th Aug 20255012 PMAQI
19th Aug 2025501 PMAQI
19th Aug 2025512 PMAQI
19th Aug 2025513 PMAQI
19th Aug 2025504 PMAQI
19th Aug 2025495 PMAQI
19th Aug 2025536 PMAQI
19th Aug 2025527 PMAQI
19th Aug 2025498 PMAQI
19th Aug 2025459 PMAQI
19th Aug 20254310 PMAQI
19th Aug 20254211 PMAQI
20th Aug 20254312 AMAQI
20th Aug 2025421 AMAQI
20th Aug 2025402 AMAQI
20th Aug 2025403 AMAQI

28°C25/31°C

20th Aug 2025444 AMAQI
20th Aug 2025435 AMAQI
20th Aug 2025446 AMAQI
20th Aug 2025447 AMAQI
20th Aug 2025438 AMAQI
20th Aug 2025449 AMAQI
20th Aug 20255110 AMAQI
20th Aug 20255711 AMAQI
20th Aug 20256012 PMAQI
20th Aug 2025571 PMAQI
20th Aug 2025552 PMAQI
20th Aug 2025563 PMAQI
20th Aug 2025544 PMAQI
20th Aug 2025515 PMAQI
20th Aug 2025556 PMAQI
20th Aug 2025547 PMAQI
20th Aug 2025528 PMAQI
20th Aug 2025449 PMAQI
20th Aug 20254610 PMAQI
20th Aug 20254211 PMAQI
21st Aug 20254212 AMAQI
21st Aug 2025431 AMAQI
21st Aug 2025432 AMAQI
21st Aug 2025423 AMAQI

28°C26/31°C

21st Aug 2025464 AMAQI
4 AM
21st Aug 2025475 AMAQI
21st Aug 2025476 AMAQI
21st Aug 2025467 AMAQI
21st Aug 2025468 AMAQI
21st Aug 2025579 AMAQI
21st Aug 20255510 AMAQI
21st Aug 20255311 AMAQI
11 AM
21st Aug 20255612 PMAQI
21st Aug 2025631 PMAQI
21st Aug 2025622 PMAQI
21st Aug 2025603 PMAQI
21st Aug 2025544 PMAQI
21st Aug 2025515 PMAQI
21st Aug 2025546 PMAQI
6 PM
21st Aug 2025547 PMAQI
21st Aug 2025548 PMAQI
21st Aug 2025539 PMAQI
21st Aug 20255210 PMAQI
11 PM
3 AM

--°C/°C

Day time
Avg. Highest Time
1 PM - 6 PM

41AQI

6 hours / Day
180 hours / Month
Avg. Lowest Time
9 AM - 10 AM

37AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 PM to 6 PM (Avg. 41), while the lowest AQI was between 9 AM to 10 AM (Avg. 37).
Night time
Avg. Highest Time
1 AM - 3 AM

39AQI

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

36AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 AM to 3 AM (Avg. 39), while the lowest AQI was between 12 AM to 12 AM (Avg. 36).

2025 Days Vs Air Quality

Ichihara, Chiba, Japan

2025

91%

211

9%

21

Total number of days with different AQI categories in last 233 days in 2025 (132 days remaining)

Good
211 Days
Moderate
21 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 91%

Health Risk Level:

Very Low

In 2025, 91% of 233 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

Ichihara, Chiba, 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.

-1th undefined 2025
-1th undefined 2025
-1th undefined 2025
1st January 2025
31AQI
2nd January 2025
34AQI
3rd January 2025
25AQI
4th January 2025
29AQI
5th January 2025
34AQI
6th January 2025
55AQI
7th January 2025
30AQI
8th January 2025
37AQI
9th January 2025
29AQI
10th January 2025
30AQI
11th January 2025
27AQI
12th January 2025
36AQI
13th January 2025
28AQI
14th January 2025
41AQI
15th January 2025
36AQI
16th January 2025
33AQI
17th January 2025
30AQI
18th January 2025
32AQI
19th January 2025
56AQI
20th January 2025
42AQI
21st January 2025
44AQI
22nd January 2025
39AQI
23rd January 2025
55AQI
24th January 2025
47AQI
25th January 2025
43AQI
26th January 2025
38AQI
27th January 2025
37AQI
28th January 2025
39AQI
29th January 2025
32AQI
30th January 2025
34AQI
31st January 2025
29AQI
1st February 2025
40AQI
2nd February 2025
32AQI
3rd February 2025
45AQI
4th February 2025
31AQI
5th February 2025
35AQI
6th February 2025
30AQI
7th February 2025
30AQI
8th February 2025
30AQI
9th February 2025
30AQI
10th February 2025
31AQI
11th February 2025
31AQI
12th February 2025
34AQI
13th February 2025
32AQI
14th February 2025
30AQI
15th February 2025
30AQI
16th February 2025
39AQI
17th February 2025
36AQI
18th February 2025
32AQI
19th February 2025
31AQI
20th February 2025
30AQI
21st February 2025
30AQI
22nd February 2025
32AQI
23rd February 2025
32AQI
24th February 2025
33AQI
25th February 2025
34AQI
26th February 2025
35AQI
27th February 2025
39AQI
28th February 2025
59AQI
1st March 2025
50AQI
2nd March 2025
67AQI
3rd March 2025
41AQI
4th March 2025
42AQI
5th March 2025
26AQI
6th March 2025
34AQI
7th March 2025
31AQI
8th March 2025
34AQI
9th March 2025
33AQI
10th March 2025
35AQI
11th March 2025
40AQI
12th March 2025
47AQI
13th March 2025
43AQI
14th March 2025
41AQI
15th March 2025
34AQI
16th March 2025
27AQI
17th March 2025
22AQI
18th March 2025
24AQI
19th March 2025
19AQI
20th March 2025
23AQI
21st March 2025
42AQI
22nd March 2025
48AQI
23rd March 2025
57AQI
24th March 2025
53AQI
25th March 2025
66AQI
26th March 2025
82AQI
27th March 2025
68AQI
28th March 2025
49AQI
29th March 2025
37AQI
30th March 2025
43AQI
31st March 2025
32AQI
1st April 2025
30AQI
2nd April 2025
22AQI
3rd April 2025
21AQI
4th April 2025
21AQI
5th April 2025
22AQI
6th April 2025
22AQI
7th April 2025
30AQI
8th April 2025
35AQI
9th April 2025
25AQI
10th April 2025
45AQI
11th April 2025
39AQI
12th April 2025
36AQI
13th April 2025
27AQI
14th April 2025
39AQI
15th April 2025
30AQI
16th April 2025
33AQI
17th April 2025
45AQI
18th April 2025
49AQI
19th April 2025
61AQI
20th April 2025
44AQI
21st April 2025
43AQI
22nd April 2025
40AQI
23rd April 2025
28AQI
24th April 2025
35AQI
25th April 2025
35AQI
26th April 2025
41AQI
27th April 2025
44AQI
28th April 2025
37AQI
29th April 2025
37AQI
30th April 2025
43AQI
1st May 2025
40AQI
2nd May 2025
27AQI
3rd May 2025
32AQI
4th May 2025
37AQI
5th May 2025
33AQI
6th May 2025
27AQI
7th May 2025
24AQI
8th May 2025
25AQI
9th May 2025
27AQI
10th May 2025
21AQI
11th May 2025
29AQI
12th May 2025
32AQI
13th May 2025
34AQI
14th May 2025
30AQI
15th May 2025
36AQI
16th May 2025
37AQI
17th May 2025
25AQI
18th May 2025
41AQI
19th May 2025
41AQI
20th May 2025
58AQI
21st May 2025
38AQI
22nd May 2025
39AQI
23rd May 2025
38AQI
24th May 2025
36AQI
25th May 2025
30AQI
26th May 2025
27AQI
27th May 2025
25AQI
28th May 2025
24AQI
29th May 2025
25AQI
30th May 2025
24AQI
31st May 2025
17AQI
1st June 2025
19AQI
2nd June 2025
25AQI
3rd June 2025
28AQI
4th June 2025
33AQI
5th June 2025
39AQI
6th June 2025
43AQI
7th June 2025
46AQI
8th June 2025
51AQI
9th June 2025
37AQI
10th June 2025
28AQI
11th June 2025
27AQI
12th June 2025
35AQI
13th June 2025
32AQI
14th June 2025
31AQI
15th June 2025
34AQI
16th June 2025
36AQI
17th June 2025
46AQI
18th June 2025
42AQI
19th June 2025
39AQI
20th June 2025
33AQI
21st June 2025
29AQI
22nd June 2025
22AQI
23rd June 2025
23AQI
24th June 2025
21AQI
25th June 2025
20AQI
26th June 2025
20AQI
27th June 2025
33AQI
28th June 2025
29AQI
29th June 2025
31AQI
30th June 2025
36AQI
1st July 2025
35AQI
2nd July 2025
40AQI
3rd July 2025
39AQI
4th July 2025
40AQI
5th July 2025
49AQI
6th July 2025
66AQI
7th July 2025
74AQI
8th July 2025
74AQI
9th July 2025
71AQI
10th July 2025
54AQI
11th July 2025
49AQI
12th July 2025
54AQI
13th July 2025
48AQI
14th July 2025
42AQI
15th July 2025
40AQI
16th July 2025
39AQI
17th July 2025
40AQI
18th July 2025
37AQI
19th July 2025
34AQI
20th July 2025
32AQI
21st July 2025
32AQI
22nd July 2025
31AQI
23rd July 2025
30AQI
24th July 2025
33AQI
25th July 2025
27AQI
26th July 2025
26AQI
27th July 2025
25AQI
28th July 2025
30AQI
29th July 2025
27AQI
30th July 2025
28AQI
31st July 2025
29AQI
1st August 2025
33AQI
2nd August 2025
41AQI
3rd August 2025
44AQI
4th August 2025
61AQI
5th August 2025
50AQI
6th August 2025
51AQI
7th August 2025
49AQI
8th August 2025
46AQI
9th August 2025
48AQI
10th August 2025
38AQI
11th August 2025
38AQI
12th August 2025
36AQI
13th August 2025
34AQI
14th August 2025
39AQI
15th August 2025
37AQI
16th August 2025
40AQI
17th August 2025
40AQI
18th August 2025
44AQI
19th August 2025
46AQI
20th August 2025
47AQI
21st August 2025
22nd August 2025
23rd August 2025
24th August 2025
25th August 2025
26th August 2025
27th August 2025
28th August 2025
29th August 2025
30th August 2025
31st August 2025
1st September 2025
2nd September 2025
3rd September 2025
4th September 2025
5th September 2025
6th September 2025
7th September 2025
8th September 2025
9th September 2025
10th September 2025
11th September 2025
12th September 2025
13th September 2025
14th September 2025
15th September 2025
16th September 2025
17th September 2025
18th September 2025
19th September 2025
20th September 2025
21st September 2025
22nd September 2025
23rd September 2025
24th September 2025
25th September 2025
26th September 2025
27th September 2025
28th September 2025
29th September 2025
30th September 2025
1st October 2025
2nd October 2025
3rd October 2025
4th October 2025
5th October 2025
6th October 2025
7th October 2025
8th October 2025
9th October 2025
10th October 2025
11th October 2025
12th October 2025
13th October 2025
14th October 2025
15th October 2025
16th October 2025
17th October 2025
18th October 2025
19th October 2025
20th October 2025
21st October 2025
22nd October 2025
23rd October 2025
24th October 2025
25th October 2025
26th October 2025
27th October 2025
28th October 2025
29th October 2025
30th October 2025
31st October 2025
1st November 2025
2nd November 2025
3rd November 2025
4th November 2025
5th November 2025
6th November 2025
7th November 2025
8th November 2025
9th November 2025
10th November 2025
11th November 2025
12th November 2025
13th November 2025
14th November 2025
15th November 2025
16th November 2025
17th November 2025
18th November 2025
19th November 2025
20th November 2025
21st November 2025
22nd November 2025
23rd November 2025
24th November 2025
25th November 2025
26th November 2025
27th November 2025
28th November 2025
29th November 2025
30th November 2025
1st December 2025
2nd December 2025
3rd December 2025
4th December 2025
5th December 2025
6th December 2025
7th December 2025
8th December 2025
9th December 2025
10th December 2025
11th December 2025
12th December 2025
13th December 2025
14th December 2025
15th December 2025
16th December 2025
17th December 2025
18th December 2025
19th December 2025
20th December 2025
21st December 2025
22nd December 2025
23rd December 2025
24th December 2025
25th December 2025
26th December 2025
27th December 2025
28th December 2025
29th December 2025
30th December 2025
31st December 2025

37AQI

34AQI

42AQI

35AQI

32AQI

32AQI

41AQI

43AQI

No. of days

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

202537AQI

28
3
27
1
25
6
29
1
30
1
29
1
25
6
18
2
211
21

Highest AQI recorded in

August

43AQI

Lowest AQI recorded in

May

32AQI

202436AQI

30
1
28
1
25
6
25
5
27
4
28
2
18
13
30
1
28
2
31
27
3
30
1
327
39

Highest AQI recorded in

July

48AQI

Lowest AQI recorded in

September

28AQI

202337AQI

25
6
25
3
28
3
25
5
28
3
24
6
28
3
31
29
1
30
1
23
6
23
8
319
45

Highest AQI recorded in

April

44AQI

Lowest AQI recorded in

August

24AQI

202240AQI

28
3
21
1
18
13
23
7
27
4
25
5
19
2
1
1
28
1
28
3
25
5
29
2
272
46
1

Highest AQI recorded in

August

89AQI

Lowest AQI recorded in

September

35AQI

202138AQI

23
8
24
4
27
4
28
2
24
7
27
3
26
5
26
5
29
1
30
1
25
5
24
7
313
52

Highest AQI recorded in

May

42AQI

Lowest AQI recorded in

April

33AQI

202038AQI

12
1
20
1
17
1
22
8
28
3
20
10
1
18
1
30
1
21
9
26
5
214
40
1

Highest AQI recorded in

August

45AQI

Lowest AQI recorded in

September

32AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2022(Avg.)
40AQI
Least Polluted Year Recorded
2024(Avg.)
36AQI

Ichihara's annual 2025 AQI (37) shows an average percentage change of -2.6% (improved AQI) compared to previous years: 2020 (38), 2021 (38), 2022 (40), 2023 (37), 2024 (36).