Onomachi, Ichikawa, 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
Onomachi, Ichikawa, Chiba, Japan
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
30th Aug 2021
66AQILowest AQI recorded on
7th Aug 2021
14AQISame Day Analysis (7th 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
Day & Night AQI Trend: 7th Aug - 8th Aug 2025
Onomachi, Ichikawa, Chiba, Japan
AQI
Day
Night
.
4 AM7th Aug 2025
6 PM
3 AM8th Aug 2025
Day time
Avg. Highest Time
5PM7th Aug
64AQI
Avg. Lowest Time
2PM7th Aug
30AQI
Night time
Avg. Highest Time
8PM7th Aug
55AQI
Avg. Lowest Time
3AM8th Aug
49AQI
In the last 24 hours,
Onomachi's AQI reached its highest point of 64 at 5 PM during the Day, while the lowest point, 30, was recorded at 2 PM during the Day between 7th Aug and 8th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Onomachi, Ichikawa, Chiba, Japan
JulAug
09th - 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 - 06th06th - 07th07th - 08th08th
Day
Night
9th Jul 2025644 AMAQI
9th Jul 2025705 AMAQI
9th Jul 2025716 AMAQI
9th Jul 2025707 AMAQI
9th Jul 2025708 AMAQI
9th Jul 2025799 AMAQI
9th Jul 20258410 AMAQI
9th Jul 20259611 AMAQI
9th Jul 20259712 PMAQI
9th Jul 2025971 PMAQI
9th Jul 20251022 PMAQI
9th Jul 20251183 PMAQI
9th Jul 20251164 PMAQI
9th Jul 2025885 PMAQI
9th Jul 2025626 PMAQI
9th Jul 2025557 PMAQI
9th Jul 2025548 PMAQI
9th Jul 2025589 PMAQI
9th Jul 20255810 PMAQI
9th Jul 20255811 PMAQI
10th Jul 20255712 AMAQI
10th Jul 2025671 AMAQI
10th Jul 2025692 AMAQI
10th Jul 2025703 AMAQI
29°C27/33°C
10th Jul 2025714 AMAQI
10th Jul 2025755 AMAQI
10th Jul 2025756 AMAQI
10th Jul 2025757 AMAQI
10th Jul 2025748 AMAQI
10th Jul 2025459 AMAQI
10th Jul 20254210 AMAQI
10th Jul 20254611 AMAQI
10th Jul 20254612 PMAQI
10th Jul 2025401 PMAQI
10th Jul 2025322 PMAQI
10th Jul 2025383 PMAQI
10th Jul 2025444 PMAQI
10th Jul 2025445 PMAQI
10th Jul 2025526 PMAQI
10th Jul 2025517 PMAQI
10th Jul 2025498 PMAQI
10th Jul 2025599 PMAQI
10th Jul 20255810 PMAQI
10th Jul 20255811 PMAQI
11th Jul 20256112 AMAQI
11th Jul 2025681 AMAQI
11th Jul 2025702 AMAQI
11th Jul 2025703 AMAQI
28°C22/34°C
11th Jul 2025704 AMAQI
11th Jul 2025645 AMAQI
11th Jul 2025646 AMAQI
11th Jul 2025657 AMAQI
11th Jul 2025658 AMAQI
11th Jul 2025319 AMAQI
11th Jul 20252010 AMAQI
11th Jul 20252011 AMAQI
11th Jul 20252012 PMAQI
11th Jul 2025301 PMAQI
11th Jul 2025292 PMAQI
11th Jul 2025343 PMAQI
11th Jul 2025304 PMAQI
11th Jul 2025325 PMAQI
11th Jul 2025336 PMAQI
11th Jul 2025327 PMAQI
11th Jul 2025408 PMAQI
11th Jul 2025569 PMAQI
11th Jul 20255610 PMAQI
11th Jul 20255711 PMAQI
12th Jul 20255812 AMAQI
12th Jul 2025641 AMAQI
12th Jul 2025662 AMAQI
12th Jul 2025663 AMAQI
23°C22/27°C
12th Jul 2025644 AMAQI
12th Jul 2025615 AMAQI
12th Jul 2025606 AMAQI
12th Jul 2025617 AMAQI
12th Jul 2025618 AMAQI
12th Jul 2025409 AMAQI
12th Jul 20253610 AMAQI
12th Jul 20253811 AMAQI
12th Jul 20253712 PMAQI
12th Jul 2025401 PMAQI
12th Jul 2025402 PMAQI
12th Jul 2025363 PMAQI
12th Jul 2025394 PMAQI
12th Jul 2025365 PMAQI
12th Jul 2025376 PMAQI
12th Jul 2025367 PMAQI
12th Jul 2025418 PMAQI
12th Jul 2025539 PMAQI
12th Jul 20255310 PMAQI
12th Jul 20255311 PMAQI
13th Jul 20255412 AMAQI
13th Jul 2025611 AMAQI
13th Jul 2025622 AMAQI
13th Jul 2025623 AMAQI
24°C21/28°C
13th Jul 2025614 AMAQI
13th Jul 2025585 AMAQI
13th Jul 2025596 AMAQI
13th Jul 2025597 AMAQI
13th Jul 2025588 AMAQI
13th Jul 2025469 AMAQI
13th Jul 20253810 AMAQI
13th Jul 20253611 AMAQI
13th Jul 20254212 PMAQI
13th Jul 2025451 PMAQI
13th Jul 2025452 PMAQI
13th Jul 2025473 PMAQI
13th Jul 2025434 PMAQI
13th Jul 2025435 PMAQI
13th Jul 2025366 PMAQI
13th Jul 2025347 PMAQI
13th Jul 2025338 PMAQI
13th Jul 2025509 PMAQI
13th Jul 20254810 PMAQI
13th Jul 20255011 PMAQI
14th Jul 20254612 AMAQI
14th Jul 2025551 AMAQI
14th Jul 2025592 AMAQI
14th Jul 2025593 AMAQI
26°C24/30°C
14th Jul 2025584 AMAQI
14th Jul 2025575 AMAQI
14th Jul 2025576 AMAQI
14th Jul 2025567 AMAQI
14th Jul 2025568 AMAQI
14th Jul 2025269 AMAQI
14th Jul 20251710 AMAQI
14th Jul 20251711 AMAQI
14th Jul 20251812 PMAQI
14th Jul 2025221 PMAQI
14th Jul 2025212 PMAQI
14th Jul 2025233 PMAQI
14th Jul 2025264 PMAQI
14th Jul 2025215 PMAQI
14th Jul 2025296 PMAQI
14th Jul 2025297 PMAQI
14th Jul 2025318 PMAQI
14th Jul 2025469 PMAQI
14th Jul 20254710 PMAQI
14th Jul 20254611 PMAQI
15th Jul 20254812 AMAQI
15th Jul 2025521 AMAQI
15th Jul 2025562 AMAQI
15th Jul 2025563 AMAQI
26°C24/29°C
15th Jul 2025554 AMAQI
15th Jul 2025535 AMAQI
15th Jul 2025536 AMAQI
15th Jul 2025527 AMAQI
15th Jul 2025528 AMAQI
15th Jul 2025309 AMAQI
15th Jul 20252210 AMAQI
15th Jul 20252311 AMAQI
15th Jul 20252412 PMAQI
15th Jul 2025251 PMAQI
15th Jul 2025242 PMAQI
15th Jul 2025273 PMAQI
15th Jul 2025304 PMAQI
15th Jul 2025355 PMAQI
15th Jul 2025476 PMAQI
15th Jul 2025417 PMAQI
15th Jul 2025308 PMAQI
15th Jul 2025389 PMAQI
15th Jul 20254410 PMAQI
15th Jul 20254911 PMAQI
16th Jul 20255212 AMAQI
16th Jul 2025531 AMAQI
16th Jul 2025532 AMAQI
16th Jul 2025533 AMAQI
27°C26/29°C
16th Jul 2025534 AMAQI
16th Jul 2025515 AMAQI
16th Jul 2025516 AMAQI
16th Jul 2025517 AMAQI
16th Jul 2025518 AMAQI
16th Jul 2025469 AMAQI
16th Jul 20253610 AMAQI
16th Jul 20252811 AMAQI
16th Jul 20252812 PMAQI
16th Jul 2025301 PMAQI
16th Jul 2025212 PMAQI
16th Jul 2025293 PMAQI
16th Jul 2025284 PMAQI
16th Jul 2025305 PMAQI
16th Jul 2025286 PMAQI
16th Jul 2025277 PMAQI
16th Jul 2025338 PMAQI
16th Jul 2025429 PMAQI
16th Jul 20254110 PMAQI
16th Jul 20254111 PMAQI
17th Jul 20254512 AMAQI
17th Jul 2025511 AMAQI
17th Jul 2025522 AMAQI
17th Jul 2025523 AMAQI
27°C26/28°C
17th Jul 2025514 AMAQI
17th Jul 2025495 AMAQI
17th Jul 2025486 AMAQI
17th Jul 2025487 AMAQI
17th Jul 2025488 AMAQI
17th Jul 2025329 AMAQI
17th Jul 20253210 AMAQI
17th Jul 20253811 AMAQI
17th Jul 20253712 PMAQI
17th Jul 2025381 PMAQI
17th Jul 2025382 PMAQI
17th Jul 2025353 PMAQI
17th Jul 2025334 PMAQI
17th Jul 2025385 PMAQI
17th Jul 2025396 PMAQI
17th Jul 2025387 PMAQI
17th Jul 2025428 PMAQI
17th Jul 2025449 PMAQI
17th Jul 20254310 PMAQI
17th Jul 20254411 PMAQI
18th Jul 20254312 AMAQI
18th Jul 2025501 AMAQI
18th Jul 2025502 AMAQI
18th Jul 2025513 AMAQI
28°C26/30°C
18th Jul 2025504 AMAQI
18th Jul 2025485 AMAQI
18th Jul 2025476 AMAQI
18th Jul 2025487 AMAQI
18th Jul 2025478 AMAQI
18th Jul 2025369 AMAQI
18th Jul 20253010 AMAQI
18th Jul 20252611 AMAQI
18th Jul 20252612 PMAQI
18th Jul 2025321 PMAQI
18th Jul 2025252 PMAQI
18th Jul 2025183 PMAQI
18th Jul 2025234 PMAQI
18th Jul 2025355 PMAQI
18th Jul 2025246 PMAQI
18th Jul 2025267 PMAQI
18th Jul 2025368 PMAQI
18th Jul 2025419 PMAQI
18th Jul 20254110 PMAQI
18th Jul 20254311 PMAQI
19th Jul 20254112 AMAQI
19th Jul 2025461 AMAQI
19th Jul 2025482 AMAQI
19th Jul 2025483 AMAQI
27°C25/30°C
19th Jul 2025464 AMAQI
19th Jul 2025435 AMAQI
19th Jul 2025436 AMAQI
19th Jul 2025447 AMAQI
19th Jul 2025438 AMAQI
19th Jul 2025269 AMAQI
19th Jul 20252010 AMAQI
19th Jul 20251811 AMAQI
19th Jul 20252412 PMAQI
19th Jul 2025221 PMAQI
19th Jul 2025262 PMAQI
19th Jul 2025223 PMAQI
19th Jul 2025204 PMAQI
19th Jul 2025205 PMAQI
19th Jul 2025226 PMAQI
19th Jul 2025227 PMAQI
19th Jul 2025328 PMAQI
19th Jul 2025379 PMAQI
19th Jul 20253610 PMAQI
19th Jul 20253311 PMAQI
20th Jul 20253812 AMAQI
20th Jul 2025421 AMAQI
20th Jul 2025442 AMAQI
20th Jul 2025453 AMAQI
28°C25/31°C
20th Jul 2025444 AMAQI
20th Jul 2025415 AMAQI
20th Jul 2025416 AMAQI
20th Jul 2025407 AMAQI
20th Jul 2025418 AMAQI
20th Jul 2025309 AMAQI
20th Jul 20251810 AMAQI
20th Jul 20251811 AMAQI
20th Jul 20252512 PMAQI
20th Jul 2025241 PMAQI
20th Jul 2025212 PMAQI
20th Jul 2025213 PMAQI
20th Jul 2025214 PMAQI
20th Jul 2025225 PMAQI
20th Jul 2025266 PMAQI
20th Jul 2025267 PMAQI
20th Jul 2025328 PMAQI
20th Jul 2025389 PMAQI
20th Jul 20253410 PMAQI
20th Jul 20253511 PMAQI
21st Jul 20253712 AMAQI
21st Jul 2025401 AMAQI
21st Jul 2025412 AMAQI
21st Jul 2025413 AMAQI
28°C26/31°C
21st Jul 2025404 AMAQI
21st Jul 2025375 AMAQI
21st Jul 2025376 AMAQI
21st Jul 2025377 AMAQI
21st Jul 2025378 AMAQI
21st Jul 2025289 AMAQI
21st Jul 20253010 AMAQI
21st Jul 20253011 AMAQI
21st Jul 20253412 PMAQI
21st Jul 2025331 PMAQI
21st Jul 2025332 PMAQI
21st Jul 2025273 PMAQI
21st Jul 2025294 PMAQI
21st Jul 2025325 PMAQI
21st Jul 2025286 PMAQI
21st Jul 2025277 PMAQI
21st Jul 2025308 PMAQI
21st Jul 2025349 PMAQI
21st Jul 20253410 PMAQI
21st Jul 20253411 PMAQI
22nd Jul 20253212 AMAQI
22nd Jul 2025381 AMAQI
22nd Jul 2025392 AMAQI
22nd Jul 2025383 AMAQI
29°C27/33°C
22nd Jul 2025384 AMAQI
22nd Jul 2025375 AMAQI
22nd Jul 2025386 AMAQI
22nd Jul 2025387 AMAQI
22nd Jul 2025388 AMAQI
22nd Jul 2025289 AMAQI
22nd Jul 20253010 AMAQI
22nd Jul 20252811 AMAQI
22nd Jul 20253112 PMAQI
22nd Jul 2025401 PMAQI
22nd Jul 2025412 PMAQI
22nd Jul 2025403 PMAQI
22nd Jul 2025404 PMAQI
22nd Jul 2025375 PMAQI
22nd Jul 2025296 PMAQI
22nd Jul 2025257 PMAQI
22nd Jul 2025298 PMAQI
22nd Jul 2025309 PMAQI
22nd Jul 20253210 PMAQI
22nd Jul 20253111 PMAQI
23rd Jul 20253112 AMAQI
23rd Jul 2025351 AMAQI
23rd Jul 2025382 AMAQI
23rd Jul 2025383 AMAQI
29°C27/33°C
23rd Jul 2025384 AMAQI
23rd Jul 2025385 AMAQI
23rd Jul 2025386 AMAQI
23rd Jul 2025387 AMAQI
23rd Jul 2025378 AMAQI
23rd Jul 2025269 AMAQI
23rd Jul 20252810 AMAQI
23rd Jul 20253011 AMAQI
23rd Jul 20254412 PMAQI
23rd Jul 2025551 PMAQI
23rd Jul 2025552 PMAQI
23rd Jul 2025503 PMAQI
23rd Jul 2025444 PMAQI
23rd Jul 2025415 PMAQI
23rd Jul 2025316 PMAQI
23rd Jul 2025297 PMAQI
23rd Jul 2025328 PMAQI
23rd Jul 2025329 PMAQI
23rd Jul 20253010 PMAQI
23rd Jul 20252911 PMAQI
24th Jul 20253012 AMAQI
24th Jul 2025361 AMAQI
24th Jul 2025382 AMAQI
24th Jul 2025373 AMAQI
29°C27/33°C
24th Jul 2025374 AMAQI
24th Jul 2025405 AMAQI
24th Jul 2025386 AMAQI
24th Jul 2025387 AMAQI
24th Jul 2025388 AMAQI
24th Jul 2025359 AMAQI
24th Jul 20253610 AMAQI
24th Jul 20254311 AMAQI
24th Jul 20255012 PMAQI
24th Jul 2025531 PMAQI
24th Jul 2025582 PMAQI
24th Jul 2025553 PMAQI
24th Jul 2025504 PMAQI
24th Jul 2025345 PMAQI
24th Jul 2025276 PMAQI
24th Jul 2025227 PMAQI
24th Jul 2025288 PMAQI
24th Jul 2025349 PMAQI
24th Jul 20253010 PMAQI
24th Jul 20253111 PMAQI
25th Jul 20253212 AMAQI
25th Jul 2025361 AMAQI
25th Jul 2025372 AMAQI
25th Jul 2025383 AMAQI
29°C27/34°C
25th Jul 2025384 AMAQI
25th Jul 2025405 AMAQI
25th Jul 2025406 AMAQI
25th Jul 2025417 AMAQI
25th Jul 2025408 AMAQI
25th Jul 2025329 AMAQI
25th Jul 20253010 AMAQI
25th Jul 20254011 AMAQI
25th Jul 20254112 PMAQI
25th Jul 2025371 PMAQI
25th Jul 2025322 PMAQI
25th Jul 2025293 PMAQI
25th Jul 2025264 PMAQI
25th Jul 2025225 PMAQI
25th Jul 2025206 PMAQI
25th Jul 2025197 PMAQI
25th Jul 2025268 PMAQI
25th Jul 2025309 PMAQI
25th Jul 20252810 PMAQI
25th Jul 20253011 PMAQI
26th Jul 20253012 AMAQI
26th Jul 2025361 AMAQI
26th Jul 2025372 AMAQI
26th Jul 2025383 AMAQI
30°C27/33°C
26th Jul 2025384 AMAQI
26th Jul 2025385 AMAQI
26th Jul 2025386 AMAQI
26th Jul 2025387 AMAQI
26th Jul 2025388 AMAQI
26th Jul 2025269 AMAQI
26th Jul 20252210 AMAQI
26th Jul 20253211 AMAQI
26th Jul 20253812 PMAQI
26th Jul 2025341 PMAQI
26th Jul 2025342 PMAQI
26th Jul 2025283 PMAQI
26th Jul 2025254 PMAQI
26th Jul 2025275 PMAQI
26th Jul 2025286 PMAQI
26th Jul 2025267 PMAQI
26th Jul 2025268 PMAQI
26th Jul 2025329 PMAQI
26th Jul 20253110 PMAQI
26th Jul 20252911 PMAQI
27th Jul 20253012 AMAQI
27th Jul 2025371 AMAQI
27th Jul 2025382 AMAQI
27th Jul 2025363 AMAQI
30°C28/33°C
27th Jul 2025364 AMAQI
27th Jul 2025365 AMAQI
27th Jul 2025366 AMAQI
27th Jul 2025367 AMAQI
27th Jul 2025358 AMAQI
27th Jul 2025299 AMAQI
27th Jul 20252610 AMAQI
27th Jul 20253211 AMAQI
27th Jul 20253212 PMAQI
27th Jul 2025281 PMAQI
27th Jul 2025272 PMAQI
27th Jul 2025273 PMAQI
27th Jul 2025254 PMAQI
27th Jul 2025225 PMAQI
27th Jul 2025186 PMAQI
27th Jul 2025207 PMAQI
27th Jul 2025278 PMAQI
27th Jul 2025289 PMAQI
27th Jul 20252810 PMAQI
27th Jul 20253011 PMAQI
28th Jul 20253112 AMAQI
28th Jul 2025341 AMAQI
28th Jul 2025352 AMAQI
28th Jul 2025363 AMAQI
29°C27/33°C
28th Jul 2025354 AMAQI
28th Jul 2025345 AMAQI
28th Jul 2025356 AMAQI
28th Jul 2025357 AMAQI
28th Jul 2025348 AMAQI
28th Jul 2025259 AMAQI
28th Jul 20252410 AMAQI
28th Jul 20252911 AMAQI
28th Jul 20254112 PMAQI
28th Jul 2025561 PMAQI
28th Jul 2025582 PMAQI
28th Jul 2025543 PMAQI
28th Jul 2025514 PMAQI
28th Jul 2025405 PMAQI
28th Jul 2025376 PMAQI
28th Jul 2025307 PMAQI
28th Jul 2025318 PMAQI
28th Jul 2025359 PMAQI
28th Jul 20253210 PMAQI
28th Jul 20252811 PMAQI
29th Jul 20252812 AMAQI
29th Jul 2025341 AMAQI
29th Jul 2025332 AMAQI
29th Jul 2025333 AMAQI
30°C27/35°C
29th Jul 2025364 AMAQI
29th Jul 2025385 AMAQI
29th Jul 2025376 AMAQI
29th Jul 2025367 AMAQI
29th Jul 2025368 AMAQI
29th Jul 2025289 AMAQI
29th Jul 20253010 AMAQI
29th Jul 20253611 AMAQI
29th Jul 20254712 PMAQI
29th Jul 2025471 PMAQI
29th Jul 2025442 PMAQI
29th Jul 2025443 PMAQI
29th Jul 2025364 PMAQI
29th Jul 2025325 PMAQI
29th Jul 2025256 PMAQI
29th Jul 2025237 PMAQI
29th Jul 2025278 PMAQI
29th Jul 2025319 PMAQI
29th Jul 20252810 PMAQI
29th Jul 20252811 PMAQI
30th Jul 20252912 AMAQI
30th Jul 2025341 AMAQI
30th Jul 2025342 AMAQI
30th Jul 2025353 AMAQI
31°C26/37°C
30th Jul 2025354 AMAQI
30th Jul 2025365 AMAQI
30th Jul 2025366 AMAQI
30th Jul 2025367 AMAQI
30th Jul 2025368 AMAQI
30th Jul 2025239 AMAQI
30th Jul 20251910 AMAQI
30th Jul 20252211 AMAQI
30th Jul 20252412 PMAQI
30th Jul 2025321 PMAQI
30th Jul 2025282 PMAQI
30th Jul 2025223 PMAQI
30th Jul 2025254 PMAQI
30th Jul 2025325 PMAQI
30th Jul 2025316 PMAQI
30th Jul 2025337 PMAQI
30th Jul 2025358 PMAQI
30th Jul 2025379 PMAQI
30th Jul 20253610 PMAQI
30th Jul 20253411 PMAQI
31st Jul 20253412 AMAQI
31st Jul 2025341 AMAQI
31st Jul 2025342 AMAQI
31st Jul 2025333 AMAQI
29°C26/35°C
31st Jul 2025334 AMAQI
31st Jul 2025335 AMAQI
31st Jul 2025336 AMAQI
31st Jul 2025337 AMAQI
31st Jul 2025338 AMAQI
31st Jul 2025339 AMAQI
31st Jul 20253310 AMAQI
31st Jul 20253111 AMAQI
31st Jul 20253012 PMAQI
31st Jul 2025261 PMAQI
31st Jul 2025232 PMAQI
31st Jul 2025283 PMAQI
31st Jul 2025244 PMAQI
31st Jul 2025245 PMAQI
31st Jul 2025236 PMAQI
31st Jul 2025187 PMAQI
31st Jul 2025288 PMAQI
31st Jul 2025279 PMAQI
31st Jul 20252910 PMAQI
31st Jul 20252711 PMAQI
1st Aug 20252812 AMAQI
1st Aug 2025321 AMAQI
1st Aug 2025332 AMAQI
1st Aug 2025343 AMAQI
28°C25/33°C
1st Aug 2025364 AMAQI
1st Aug 2025355 AMAQI
1st Aug 2025366 AMAQI
1st Aug 2025367 AMAQI
1st Aug 2025368 AMAQI
1st Aug 2025399 AMAQI
1st Aug 20253010 AMAQI
1st Aug 20254611 AMAQI
1st Aug 20254212 PMAQI
1st Aug 2025401 PMAQI
1st Aug 2025322 PMAQI
1st Aug 2025263 PMAQI
1st Aug 2025404 PMAQI
1st Aug 2025285 PMAQI
1st Aug 2025396 PMAQI
1st Aug 2025227 PMAQI
1st Aug 2025278 PMAQI
1st Aug 2025279 PMAQI
1st Aug 20253010 PMAQI
1st Aug 20252711 PMAQI
2nd Aug 20252912 AMAQI
2nd Aug 2025301 AMAQI
2nd Aug 2025362 AMAQI
2nd Aug 2025373 AMAQI
28°C25/32°C
2nd Aug 2025384 AMAQI
2nd Aug 2025385 AMAQI
2nd Aug 2025396 AMAQI
2nd Aug 2025367 AMAQI
2nd Aug 2025388 AMAQI
2nd Aug 2025309 AMAQI
2nd Aug 20253410 AMAQI
2nd Aug 20254411 AMAQI
2nd Aug 20253712 PMAQI
2nd Aug 2025441 PMAQI
2nd Aug 2025592 PMAQI
2nd Aug 2025563 PMAQI
2nd Aug 2025524 PMAQI
2nd Aug 2025565 PMAQI
2nd Aug 2025566 PMAQI
2nd Aug 2025537 PMAQI
2nd Aug 2025408 PMAQI
2nd Aug 2025399 PMAQI
2nd Aug 20253710 PMAQI
2nd Aug 20254211 PMAQI
3rd Aug 20253412 AMAQI
3rd Aug 2025351 AMAQI
3rd Aug 2025372 AMAQI
3rd Aug 2025373 AMAQI
30°C26/34°C
3rd Aug 2025404 AMAQI
3rd Aug 2025405 AMAQI
3rd Aug 2025386 AMAQI
3rd Aug 2025407 AMAQI
3rd Aug 2025388 AMAQI
3rd Aug 2025479 AMAQI
3rd Aug 20254910 AMAQI
3rd Aug 20255511 AMAQI
3rd Aug 20256112 PMAQI
3rd Aug 2025521 PMAQI
3rd Aug 2025562 PMAQI
3rd Aug 2025493 PMAQI
3rd Aug 2025484 PMAQI
3rd Aug 2025545 PMAQI
3rd Aug 2025536 PMAQI
3rd Aug 2025477 PMAQI
3rd Aug 2025478 PMAQI
3rd Aug 2025429 PMAQI
3rd Aug 20254510 PMAQI
3rd Aug 20253911 PMAQI
4th Aug 20253812 AMAQI
4th Aug 2025381 AMAQI
4th Aug 2025382 AMAQI
4th Aug 2025403 AMAQI
31°C27/36°C
4th Aug 2025424 AMAQI
4th Aug 2025435 AMAQI
4th Aug 2025426 AMAQI
4th Aug 2025427 AMAQI
4th Aug 2025438 AMAQI
4th Aug 2025639 AMAQI
4th Aug 20256710 AMAQI
4th Aug 20258111 AMAQI
4th Aug 20258212 PMAQI
4th Aug 2025951 PMAQI
4th Aug 2025932 PMAQI
4th Aug 2025863 PMAQI
4th Aug 2025864 PMAQI
4th Aug 2025905 PMAQI
4th Aug 2025746 PMAQI
4th Aug 2025767 PMAQI
4th Aug 2025678 PMAQI
4th Aug 2025589 PMAQI
4th Aug 20255410 PMAQI
4th Aug 20254611 PMAQI
5th Aug 20255012 AMAQI
5th Aug 2025441 AMAQI
5th Aug 2025402 AMAQI
5th Aug 2025403 AMAQI
30°C28/34°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 20256210 AMAQI
5th Aug 20256011 AMAQI
5th Aug 20256312 PMAQI
5th Aug 2025571 PMAQI
5th Aug 2025562 PMAQI
5th Aug 2025563 PMAQI
5th Aug 2025614 PMAQI
5th Aug 2025525 PMAQI
5th Aug 2025486 PMAQI
5th Aug 2025477 PMAQI
5th Aug 2025488 PMAQI
5th Aug 2025489 PMAQI
5th Aug 20254810 PMAQI
5th Aug 20254811 PMAQI
6th Aug 20254812 AMAQI
6th Aug 2025481 AMAQI
6th Aug 2025502 AMAQI
6th Aug 2025493 AMAQI
31°C29/35°C
6th Aug 2025524 AMAQI
6th Aug 2025525 AMAQI
6th Aug 2025526 AMAQI
6th Aug 2025527 AMAQI
6th Aug 2025528 AMAQI
6th Aug 2025509 AMAQI
6th Aug 20253810 AMAQI
6th Aug 20254011 AMAQI
6th Aug 20255512 PMAQI
6th Aug 2025501 PMAQI
6th Aug 2025562 PMAQI
6th Aug 2025533 PMAQI
6th Aug 2025534 PMAQI
6th Aug 2025565 PMAQI
6th Aug 2025546 PMAQI
6th Aug 2025587 PMAQI
6th Aug 2025558 PMAQI
6th Aug 2025469 PMAQI
6th Aug 20254810 PMAQI
6th Aug 20254611 PMAQI
7th Aug 20254512 AMAQI
7th Aug 2025471 AMAQI
7th Aug 2025522 AMAQI
7th Aug 2025503 AMAQI
32°C29/36°C
7th Aug 2025514 AMAQI
7th Aug 2025505 AMAQI
7th Aug 2025516 AMAQI
7th Aug 2025467 AMAQI
7th Aug 2025518 AMAQI
7th Aug 2025469 AMAQI
7th Aug 20254410 AMAQI
7th Aug 20254411 AMAQI
7th Aug 20253312 PMAQI
7th Aug 2025341 PMAQI
7th Aug 2025302 PMAQI
7th Aug 2025383 PMAQI
7th Aug 2025604 PMAQI
7th Aug 2025645 PMAQI
7th Aug 2025566 PMAQI
7th Aug 2025507 PMAQI
7th Aug 2025558 PMAQI
7th Aug 2025549 PMAQI
7th Aug 20255210 PMAQI
7th Aug 20255111 PMAQI
8th Aug 20255012 AMAQI
8th Aug 2025491 AMAQI
8th Aug 2025492 AMAQI
8th Aug 2025493 AMAQI
31°C28/34°C
8th Aug 2025484 AMAQI
4 AM8th Aug 2025485 AMAQI
8th Aug 2025476 AMAQI
8th Aug 2025487 AMAQI
8th Aug 2025488 AMAQI
8th Aug 2025339 AMAQI
8th Aug 20252610 AMAQI
8th Aug 20253411 AMAQI
11 AM8th Aug 20254212 PMAQI
8th Aug 2025441 PMAQI
8th Aug 2025522 PMAQI
8th Aug 2025573 PMAQI
8th Aug 2025554 PMAQI
8th Aug 2025525 PMAQI
8th Aug 2025546 PMAQI
6 PM8th Aug 2025527 PMAQI
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
10 AM
34AQI
1 hours / Day
30 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 10 AM to 10 AM (Avg. 34).
Night time
Avg. Highest Time
1 AM - 3 AM
46AQI
3 hours / Day
90 hours / Month
Avg. Lowest Time
7 PM
35AQI
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. 46), while the lowest AQI was between 7 PM to 7 PM (Avg. 35).
2025 Days Vs Air Quality
Onomachi, Ichikawa, Chiba, Japan
2025
89%
195
11%
24
Total number of days with different AQI categories in last 220 days in 2025 (145 days remaining)
Good
195 DaysModerate
24 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2025, 89% of 220 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
Onomachi, Ichikawa, 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.
1st January 2025
32AQI
32AQI
2nd January 2025
31AQI
31AQI
3rd January 2025
25AQI
25AQI
4th January 2025
30AQI
30AQI
5th January 2025
37AQI
37AQI
6th January 2025
50AQI
50AQI
7th January 2025
32AQI
32AQI
8th January 2025
35AQI
35AQI
9th January 2025
29AQI
29AQI
10th January 2025
29AQI
29AQI
11th January 2025
30AQI
30AQI
12th January 2025
39AQI
39AQI
13th January 2025
30AQI
30AQI
14th January 2025
42AQI
42AQI
15th January 2025
37AQI
37AQI
16th January 2025
35AQI
35AQI
17th January 2025
32AQI
32AQI
18th January 2025
34AQI
34AQI
19th January 2025
51AQI
51AQI
20th January 2025
41AQI
41AQI
21st January 2025
43AQI
43AQI
22nd January 2025
42AQI
42AQI
23rd January 2025
52AQI
52AQI
24th January 2025
47AQI
47AQI
25th January 2025
44AQI
44AQI
26th January 2025
37AQI
37AQI
27th January 2025
41AQI
41AQI
28th January 2025
41AQI
41AQI
29th January 2025
33AQI
33AQI
30th January 2025
34AQI
34AQI
31st January 2025
30AQI
30AQI
1st February 2025
39AQI
39AQI
2nd February 2025
32AQI
32AQI
3rd February 2025
39AQI
39AQI
4th February 2025
31AQI
31AQI
5th February 2025
33AQI
33AQI
6th February 2025
28AQI
28AQI
7th February 2025
29AQI
29AQI
8th February 2025
29AQI
29AQI
9th February 2025
29AQI
29AQI
10th February 2025
29AQI
29AQI
11th February 2025
31AQI
31AQI
12th February 2025
35AQI
35AQI
13th February 2025
43AQI
43AQI
14th February 2025
32AQI
32AQI
15th February 2025
44AQI
44AQI
16th February 2025
40AQI
40AQI
17th February 2025
40AQI
40AQI
18th February 2025
33AQI
33AQI
19th February 2025
31AQI
31AQI
20th February 2025
30AQI
30AQI
21st February 2025
30AQI
30AQI
22nd February 2025
31AQI
31AQI
23rd February 2025
32AQI
32AQI
24th February 2025
33AQI
33AQI
25th February 2025
34AQI
34AQI
26th February 2025
37AQI
37AQI
27th February 2025
41AQI
41AQI
28th February 2025
57AQI
57AQI
1st March 2025
50AQI
50AQI
2nd March 2025
62AQI
62AQI
3rd March 2025
40AQI
40AQI
4th March 2025
40AQI
40AQI
5th March 2025
25AQI
25AQI
6th March 2025
34AQI
34AQI
7th March 2025
31AQI
31AQI
8th March 2025
36AQI
36AQI
9th March 2025
34AQI
34AQI
10th March 2025
35AQI
35AQI
11th March 2025
45AQI
45AQI
12th March 2025
46AQI
46AQI
13th March 2025
41AQI
41AQI
14th March 2025
42AQI
42AQI
15th March 2025
38AQI
38AQI
16th March 2025
27AQI
27AQI
17th March 2025
21AQI
21AQI
18th March 2025
25AQI
25AQI
19th March 2025
17AQI
17AQI
20th March 2025
24AQI
24AQI
21st March 2025
41AQI
41AQI
22nd March 2025
49AQI
49AQI
23rd March 2025
55AQI
55AQI
24th March 2025
53AQI
53AQI
25th March 2025
67AQI
67AQI
26th March 2025
78AQI
78AQI
27th March 2025
71AQI
71AQI
28th March 2025
51AQI
51AQI
29th March 2025
38AQI
38AQI
30th March 2025
43AQI
43AQI
31st March 2025
33AQI
33AQI
1st April 2025
29AQI
29AQI
2nd April 2025
22AQI
22AQI
3rd April 2025
20AQI
20AQI
4th April 2025
20AQI
20AQI
5th April 2025
26AQI
26AQI
6th April 2025
25AQI
25AQI
7th April 2025
31AQI
31AQI
8th April 2025
38AQI
38AQI
9th April 2025
28AQI
28AQI
10th April 2025
48AQI
48AQI
11th April 2025
37AQI
37AQI
12th April 2025
40AQI
40AQI
13th April 2025
29AQI
29AQI
14th April 2025
42AQI
42AQI
15th April 2025
30AQI
30AQI
16th April 2025
37AQI
37AQI
17th April 2025
46AQI
46AQI
18th April 2025
53AQI
53AQI
19th April 2025
63AQI
63AQI
20th April 2025
51AQI
51AQI
21st April 2025
44AQI
44AQI
22nd April 2025
47AQI
47AQI
23rd April 2025
32AQI
32AQI
24th April 2025
42AQI
42AQI
25th April 2025
38AQI
38AQI
26th April 2025
47AQI
47AQI
27th April 2025
48AQI
48AQI
28th April 2025
43AQI
43AQI
29th April 2025
35AQI
35AQI
30th April 2025
44AQI
44AQI
1st May 2025
38AQI
38AQI
2nd May 2025
28AQI
28AQI
3rd May 2025
31AQI
31AQI
4th May 2025
36AQI
36AQI
5th May 2025
35AQI
35AQI
6th May 2025
27AQI
27AQI
7th May 2025
23AQI
23AQI
8th May 2025
26AQI
26AQI
9th May 2025
30AQI
30AQI
10th May 2025
26AQI
26AQI
11th May 2025
29AQI
29AQI
12th May 2025
25AQI
25AQI
13th May 2025
37AQI
37AQI
14th May 2025
35AQI
35AQI
15th May 2025
38AQI
38AQI
16th May 2025
40AQI
40AQI
17th May 2025
33AQI
33AQI
18th May 2025
47AQI
47AQI
19th May 2025
41AQI
41AQI
20th May 2025
62AQI
62AQI
21st May 2025
44AQI
44AQI
22nd May 2025
42AQI
42AQI
23rd May 2025
38AQI
38AQI
24th May 2025
38AQI
38AQI
25th May 2025
29AQI
29AQI
26th May 2025
27AQI
27AQI
27th May 2025
23AQI
23AQI
28th May 2025
23AQI
23AQI
29th May 2025
27AQI
27AQI
30th May 2025
25AQI
25AQI
31st May 2025
16AQI
16AQI
1st June 2025
22AQI
22AQI
2nd June 2025
28AQI
28AQI
3rd June 2025
31AQI
31AQI
4th June 2025
33AQI
33AQI
5th June 2025
37AQI
37AQI
6th June 2025
46AQI
46AQI
7th June 2025
46AQI
46AQI
8th June 2025
55AQI
55AQI
9th June 2025
41AQI
41AQI
10th June 2025
34AQI
34AQI
11th June 2025
30AQI
30AQI
12th June 2025
39AQI
39AQI
13th June 2025
37AQI
37AQI
14th June 2025
35AQI
35AQI
15th June 2025
39AQI
39AQI
16th June 2025
39AQI
39AQI
17th June 2025
49AQI
49AQI
18th June 2025
42AQI
42AQI
19th June 2025
39AQI
39AQI
20th June 2025
36AQI
36AQI
21st June 2025
32AQI
32AQI
22nd June 2025
24AQI
24AQI
23rd June 2025
26AQI
26AQI
24th June 2025
24AQI
24AQI
25th June 2025
21AQI
21AQI
26th June 2025
22AQI
22AQI
27th June 2025
33AQI
33AQI
28th June 2025
30AQI
30AQI
29th June 2025
36AQI
36AQI
30th June 2025
38AQI
38AQI
1st July 2025
38AQI
38AQI
2nd July 2025
45AQI
45AQI
3rd July 2025
41AQI
41AQI
4th July 2025
47AQI
47AQI
5th July 2025
52AQI
52AQI
6th July 2025
68AQI
68AQI
7th July 2025
78AQI
78AQI
8th July 2025
77AQI
77AQI
9th July 2025
73AQI
73AQI
10th July 2025
57AQI
57AQI
11th July 2025
48AQI
48AQI
12th July 2025
50AQI
50AQI
13th July 2025
49AQI
49AQI
14th July 2025
40AQI
40AQI
15th July 2025
41AQI
41AQI
16th July 2025
40AQI
40AQI
17th July 2025
43AQI
43AQI
18th July 2025
38AQI
38AQI
19th July 2025
33AQI
33AQI
20th July 2025
33AQI
33AQI
21st July 2025
34AQI
34AQI
22nd July 2025
34AQI
34AQI
23rd July 2025
36AQI
36AQI
24th July 2025
37AQI
37AQI
25th July 2025
32AQI
32AQI
26th July 2025
32AQI
32AQI
27th July 2025
30AQI
30AQI
28th July 2025
36AQI
36AQI
29th July 2025
33AQI
33AQI
30th July 2025
32AQI
32AQI
31st July 2025
29AQI
29AQI
1st August 2025
33AQI
33AQI
2nd August 2025
42AQI
42AQI
3rd August 2025
45AQI
45AQI
4th August 2025
61AQI
61AQI
5th August 2025
51AQI
51AQI
6th August 2025
51AQI
51AQI
7th August 2025
47AQI
47AQI
37AQI
35AQI
42AQI
38AQI
33AQI
35AQI
44AQI
47AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202538AQI
29
2
27
1
24
7
27
3
30
1
29
1
25
6
4
3
195
24
Highest AQI recorded in
August47AQI
Lowest AQI recorded in
May33AQI
202440AQI
23
8
25
4
22
9
17
13
26
5
28
2
20
11
30
1
28
2
29
2
26
4
30
1
304
62
Highest AQI recorded in
April51AQI
Lowest AQI recorded in
August29AQI
202343AQI
23
8
21
7
23
8
18
12
23
8
18
12
25
6
30
1
29
1
25
6
18
11
18
13
271
93
Highest AQI recorded in
April51AQI
Lowest AQI recorded in
August28AQI
202241AQI
21
9
14
7
21
10
19
11
26
5
20
10
19
3
1
27
1
26
5
20
10
27
4
241
75
Highest AQI recorded in
April46AQI
Lowest AQI recorded in
August28AQI
202140AQI
19
11
1
20
8
22
7
2
25
5
23
8
26
4
28
3
23
8
29
1
27
2
19
11
17
14
278
82
3
Highest AQI recorded in
December47AQI
Lowest AQI recorded in
August34AQI
202039AQI
11
2
17
4
16
2
21
9
31
23
8
19
26
5
19
11
18
13
201
54
Highest AQI recorded in
December47AQI
Lowest AQI recorded in
September28AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
43AQILeast Polluted Year Recorded
2025(Avg.)
38AQIOnomachi's annual 2025 AQI (38) shows an average percentage change of -6.6% (improved AQI) compared to previous years: 2020 (39), 2021 (40), 2022 (41), 2023 (43), 2024 (40).
