Katsushika, Matsudo, 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
Katsushika, Matsudo, Chiba, Japan
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
9th Aug 2021
57AQILowest AQI recorded on
25th Aug 2023
9AQISame Day Analysis (4th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 54 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 4th Aug - 5th Aug 2025
Katsushika, Matsudo, Chiba, Japan
AQI
Day
Night
.
4 AM4th Aug 2025
6 PM
3 AM5th Aug 2025
Day time
Avg. Highest Time
2PM4th Aug
94AQI
Avg. Lowest Time
4AM4th Aug
41AQI
Night time
Avg. Highest Time
7PM4th Aug
74AQI
Avg. Lowest Time
3AM5th Aug
40AQI
In the last 24 hours,
Katsushika's AQI reached its highest point of 94 at 2 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
Katsushika, Matsudo, Chiba, 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 2025424 AMAQI
6th Jul 2025455 AMAQI
6th Jul 2025456 AMAQI
6th Jul 2025467 AMAQI
6th Jul 2025468 AMAQI
6th Jul 2025569 AMAQI
6th Jul 20257410 AMAQI
6th Jul 20258011 AMAQI
6th Jul 20258812 PMAQI
6th Jul 2025801 PMAQI
6th Jul 2025832 PMAQI
6th Jul 2025843 PMAQI
6th Jul 2025864 PMAQI
6th Jul 2025925 PMAQI
6th Jul 2025956 PMAQI
6th Jul 20251007 PMAQI
6th Jul 2025948 PMAQI
6th Jul 2025769 PMAQI
6th Jul 20257310 PMAQI
6th Jul 20257311 PMAQI
7th Jul 20257212 AMAQI
7th Jul 2025661 AMAQI
7th Jul 2025492 AMAQI
7th Jul 2025493 AMAQI
31°C27/35°C
7th Jul 2025524 AMAQI
7th Jul 2025555 AMAQI
7th Jul 2025566 AMAQI
7th Jul 2025557 AMAQI
7th Jul 2025568 AMAQI
7th Jul 20251079 AMAQI
7th Jul 202512010 AMAQI
7th Jul 202511411 AMAQI
7th Jul 202511412 PMAQI
7th Jul 20251021 PMAQI
7th Jul 2025942 PMAQI
7th Jul 2025963 PMAQI
7th Jul 2025934 PMAQI
7th Jul 2025965 PMAQI
7th Jul 20251026 PMAQI
7th Jul 20251227 PMAQI
7th Jul 20251048 PMAQI
7th Jul 2025819 PMAQI
7th Jul 20257810 PMAQI
7th Jul 20257811 PMAQI
8th Jul 20257812 AMAQI
8th Jul 2025721 AMAQI
8th Jul 2025572 AMAQI
8th Jul 2025573 AMAQI
31°C27/35°C
8th Jul 2025604 AMAQI
8th Jul 2025665 AMAQI
8th Jul 2025666 AMAQI
8th Jul 2025667 AMAQI
8th Jul 2025678 AMAQI
8th Jul 20251099 AMAQI
8th Jul 202512110 AMAQI
8th Jul 202511311 AMAQI
8th Jul 202510112 PMAQI
8th Jul 2025921 PMAQI
8th Jul 2025852 PMAQI
8th Jul 2025863 PMAQI
8th Jul 2025884 PMAQI
8th Jul 2025875 PMAQI
8th Jul 2025896 PMAQI
8th Jul 2025897 PMAQI
8th Jul 2025878 PMAQI
8th Jul 2025809 PMAQI
8th Jul 20258010 PMAQI
8th Jul 20258111 PMAQI
9th Jul 20258212 AMAQI
9th Jul 2025801 AMAQI
9th Jul 2025652 AMAQI
9th Jul 2025653 AMAQI
30°C27/34°C
9th Jul 2025684 AMAQI
9th Jul 2025725 AMAQI
9th Jul 2025726 AMAQI
9th Jul 2025727 AMAQI
9th Jul 2025728 AMAQI
9th Jul 2025869 AMAQI
9th Jul 20259410 AMAQI
9th Jul 20259411 AMAQI
9th Jul 202510112 PMAQI
9th Jul 20251031 PMAQI
9th Jul 20251002 PMAQI
9th Jul 20251073 PMAQI
9th Jul 20251154 PMAQI
9th Jul 20251125 PMAQI
9th Jul 2025916 PMAQI
9th Jul 2025687 PMAQI
9th Jul 2025598 PMAQI
9th Jul 2025609 PMAQI
9th Jul 20256010 PMAQI
9th Jul 20255911 PMAQI
10th Jul 20255812 AMAQI
10th Jul 2025621 AMAQI
10th Jul 2025722 AMAQI
10th Jul 2025723 AMAQI
30°C27/34°C
10th Jul 2025754 AMAQI
10th Jul 2025785 AMAQI
10th Jul 2025786 AMAQI
10th Jul 2025787 AMAQI
10th Jul 2025788 AMAQI
10th Jul 2025389 AMAQI
10th Jul 20253110 AMAQI
10th Jul 20254811 AMAQI
10th Jul 20254812 PMAQI
10th Jul 2025391 PMAQI
10th Jul 2025382 PMAQI
10th Jul 2025393 PMAQI
10th Jul 2025324 PMAQI
10th Jul 2025455 PMAQI
10th Jul 2025506 PMAQI
10th Jul 2025587 PMAQI
10th Jul 2025578 PMAQI
10th Jul 2025609 PMAQI
10th Jul 20255810 PMAQI
10th Jul 20255711 PMAQI
11th Jul 20255712 AMAQI
11th Jul 2025611 AMAQI
11th Jul 2025702 AMAQI
11th Jul 2025703 AMAQI
28°C23/34°C
11th Jul 2025694 AMAQI
11th Jul 2025665 AMAQI
11th Jul 2025666 AMAQI
11th Jul 2025667 AMAQI
11th Jul 2025668 AMAQI
11th Jul 2025289 AMAQI
11th Jul 20251710 AMAQI
11th Jul 20251911 AMAQI
11th Jul 20251812 PMAQI
11th Jul 2025261 PMAQI
11th Jul 2025302 PMAQI
11th Jul 2025323 PMAQI
11th Jul 2025294 PMAQI
11th Jul 2025275 PMAQI
11th Jul 2025286 PMAQI
11th Jul 2025337 PMAQI
11th Jul 2025418 PMAQI
11th Jul 2025559 PMAQI
11th Jul 20255510 PMAQI
11th Jul 20255611 PMAQI
12th Jul 20255612 AMAQI
12th Jul 2025581 AMAQI
12th Jul 2025662 AMAQI
12th Jul 2025653 AMAQI
23°C22/26°C
12th Jul 2025634 AMAQI
12th Jul 2025605 AMAQI
12th Jul 2025596 AMAQI
12th Jul 2025597 AMAQI
12th Jul 2025598 AMAQI
12th Jul 2025399 AMAQI
12th Jul 20253610 AMAQI
12th Jul 20253811 AMAQI
12th Jul 20254112 PMAQI
12th Jul 2025391 PMAQI
12th Jul 2025402 PMAQI
12th Jul 2025363 PMAQI
12th Jul 2025414 PMAQI
12th Jul 2025405 PMAQI
12th Jul 2025436 PMAQI
12th Jul 2025407 PMAQI
12th Jul 2025468 PMAQI
12th Jul 2025529 PMAQI
12th Jul 20255210 PMAQI
12th Jul 20255311 PMAQI
13th Jul 20255312 AMAQI
13th Jul 2025551 AMAQI
13th Jul 2025612 AMAQI
13th Jul 2025613 AMAQI
24°C21/28°C
13th Jul 2025604 AMAQI
13th Jul 2025585 AMAQI
13th Jul 2025586 AMAQI
13th Jul 2025577 AMAQI
13th Jul 2025588 AMAQI
13th Jul 2025429 AMAQI
13th Jul 20253010 AMAQI
13th Jul 20253611 AMAQI
13th Jul 20253912 PMAQI
13th Jul 2025481 PMAQI
13th Jul 2025472 PMAQI
13th Jul 2025393 PMAQI
13th Jul 2025404 PMAQI
13th Jul 2025455 PMAQI
13th Jul 2025446 PMAQI
13th Jul 2025467 PMAQI
13th Jul 2025388 PMAQI
13th Jul 2025519 PMAQI
13th Jul 20254610 PMAQI
13th Jul 20254411 PMAQI
14th Jul 20254412 AMAQI
14th Jul 2025491 AMAQI
14th Jul 2025582 AMAQI
14th Jul 2025583 AMAQI
27°C24/31°C
14th Jul 2025574 AMAQI
14th Jul 2025565 AMAQI
14th Jul 2025556 AMAQI
14th Jul 2025567 AMAQI
14th Jul 2025568 AMAQI
14th Jul 2025339 AMAQI
14th Jul 20251710 AMAQI
14th Jul 20251611 AMAQI
14th Jul 20252612 PMAQI
14th Jul 2025261 PMAQI
14th Jul 2025242 PMAQI
14th Jul 2025223 PMAQI
14th Jul 2025234 PMAQI
14th Jul 2025315 PMAQI
14th Jul 2025256 PMAQI
14th Jul 2025277 PMAQI
14th Jul 2025428 PMAQI
14th Jul 2025489 PMAQI
14th Jul 20254310 PMAQI
14th Jul 20254211 PMAQI
15th Jul 20254312 AMAQI
15th Jul 2025461 AMAQI
15th Jul 2025552 AMAQI
15th Jul 2025553 AMAQI
26°C24/29°C
15th Jul 2025544 AMAQI
15th Jul 2025525 AMAQI
15th Jul 2025526 AMAQI
15th Jul 2025527 AMAQI
15th Jul 2025528 AMAQI
15th Jul 2025269 AMAQI
15th Jul 20252110 AMAQI
15th Jul 20252211 AMAQI
15th Jul 20252512 PMAQI
15th Jul 2025241 PMAQI
15th Jul 2025272 PMAQI
15th Jul 2025253 PMAQI
15th Jul 2025294 PMAQI
15th Jul 2025335 PMAQI
15th Jul 2025376 PMAQI
15th Jul 2025387 PMAQI
15th Jul 2025328 PMAQI
15th Jul 2025379 PMAQI
15th Jul 20253710 PMAQI
15th Jul 20253711 PMAQI
16th Jul 20254312 AMAQI
16th Jul 2025491 AMAQI
16th Jul 2025522 AMAQI
16th Jul 2025523 AMAQI
27°C26/29°C
16th Jul 2025514 AMAQI
16th Jul 2025485 AMAQI
16th Jul 2025486 AMAQI
16th Jul 2025487 AMAQI
16th Jul 2025498 AMAQI
16th Jul 2025479 AMAQI
16th Jul 20254110 AMAQI
16th Jul 20253011 AMAQI
16th Jul 20253212 PMAQI
16th Jul 2025351 PMAQI
16th Jul 2025272 PMAQI
16th Jul 2025273 PMAQI
16th Jul 2025254 PMAQI
16th Jul 2025305 PMAQI
16th Jul 2025326 PMAQI
16th Jul 2025247 PMAQI
16th Jul 2025338 PMAQI
16th Jul 2025409 PMAQI
16th Jul 20253810 PMAQI
16th Jul 20253811 PMAQI
17th Jul 20254012 AMAQI
17th Jul 2025441 AMAQI
17th Jul 2025502 AMAQI
17th Jul 2025503 AMAQI
27°C26/29°C
17th Jul 2025494 AMAQI
17th Jul 2025475 AMAQI
17th Jul 2025486 AMAQI
17th Jul 2025487 AMAQI
17th Jul 2025478 AMAQI
17th Jul 2025279 AMAQI
17th Jul 20252710 AMAQI
17th Jul 20253811 AMAQI
17th Jul 20254412 PMAQI
17th Jul 2025441 PMAQI
17th Jul 2025352 PMAQI
17th Jul 2025393 PMAQI
17th Jul 2025424 PMAQI
17th Jul 2025475 PMAQI
17th Jul 2025526 PMAQI
17th Jul 2025537 PMAQI
17th Jul 2025508 PMAQI
17th Jul 2025479 PMAQI
17th Jul 20254510 PMAQI
17th Jul 20254511 PMAQI
18th Jul 20254312 AMAQI
18th Jul 2025441 AMAQI
18th Jul 2025482 AMAQI
18th Jul 2025483 AMAQI
28°C26/31°C
18th Jul 2025464 AMAQI
18th Jul 2025455 AMAQI
18th Jul 2025446 AMAQI
18th Jul 2025457 AMAQI
18th Jul 2025458 AMAQI
18th Jul 2025319 AMAQI
18th Jul 20252810 AMAQI
18th Jul 20253411 AMAQI
18th Jul 20252612 PMAQI
18th Jul 2025291 PMAQI
18th Jul 2025322 PMAQI
18th Jul 2025293 PMAQI
18th Jul 2025194 PMAQI
18th Jul 2025265 PMAQI
18th Jul 2025266 PMAQI
18th Jul 2025337 PMAQI
18th Jul 2025308 PMAQI
18th Jul 2025389 PMAQI
18th Jul 20253810 PMAQI
18th Jul 20253611 PMAQI
19th Jul 20253212 AMAQI
19th Jul 2025381 AMAQI
19th Jul 2025462 AMAQI
19th Jul 2025463 AMAQI
28°C26/32°C
19th Jul 2025444 AMAQI
19th Jul 2025435 AMAQI
19th Jul 2025426 AMAQI
19th Jul 2025427 AMAQI
19th Jul 2025438 AMAQI
19th Jul 2025259 AMAQI
19th Jul 20251610 AMAQI
19th Jul 20252011 AMAQI
19th Jul 20252412 PMAQI
19th Jul 2025231 PMAQI
19th Jul 2025242 PMAQI
19th Jul 2025213 PMAQI
19th Jul 2025214 PMAQI
19th Jul 2025295 PMAQI
19th Jul 2025166 PMAQI
19th Jul 2025217 PMAQI
19th Jul 2025348 PMAQI
19th Jul 2025369 PMAQI
19th Jul 20253510 PMAQI
19th Jul 20253511 PMAQI
20th Jul 20253412 AMAQI
20th Jul 2025361 AMAQI
20th Jul 2025432 AMAQI
20th Jul 2025433 AMAQI
29°C26/33°C
20th Jul 2025414 AMAQI
20th Jul 2025385 AMAQI
20th Jul 2025396 AMAQI
20th Jul 2025397 AMAQI
20th Jul 2025388 AMAQI
20th Jul 2025299 AMAQI
20th Jul 20251710 AMAQI
20th Jul 20252111 AMAQI
20th Jul 20252812 PMAQI
20th Jul 2025231 PMAQI
20th Jul 2025242 PMAQI
20th Jul 2025273 PMAQI
20th Jul 2025224 PMAQI
20th Jul 2025265 PMAQI
20th Jul 2025306 PMAQI
20th Jul 2025357 PMAQI
20th Jul 2025368 PMAQI
20th Jul 2025419 PMAQI
20th Jul 20253410 PMAQI
20th Jul 20253411 PMAQI
21st Jul 20253312 AMAQI
21st Jul 2025351 AMAQI
21st Jul 2025402 AMAQI
21st Jul 2025403 AMAQI
29°C26/32°C
21st Jul 2025384 AMAQI
21st Jul 2025365 AMAQI
21st Jul 2025376 AMAQI
21st Jul 2025367 AMAQI
21st Jul 2025378 AMAQI
21st Jul 2025269 AMAQI
21st Jul 20252110 AMAQI
21st Jul 20252911 AMAQI
21st Jul 20253712 PMAQI
21st Jul 2025351 PMAQI
21st Jul 2025362 PMAQI
21st Jul 2025353 PMAQI
21st Jul 2025324 PMAQI
21st Jul 2025405 PMAQI
21st Jul 2025346 PMAQI
21st Jul 2025307 PMAQI
21st Jul 2025368 PMAQI
21st Jul 2025409 PMAQI
21st Jul 20253210 PMAQI
21st Jul 20253211 PMAQI
22nd Jul 20253012 AMAQI
22nd Jul 2025321 AMAQI
22nd Jul 2025382 AMAQI
22nd Jul 2025383 AMAQI
30°C27/34°C
22nd Jul 2025374 AMAQI
22nd Jul 2025365 AMAQI
22nd Jul 2025366 AMAQI
22nd Jul 2025367 AMAQI
22nd Jul 2025378 AMAQI
22nd Jul 2025259 AMAQI
22nd Jul 20252110 AMAQI
22nd Jul 20253211 AMAQI
22nd Jul 20253412 PMAQI
22nd Jul 2025371 PMAQI
22nd Jul 2025442 PMAQI
22nd Jul 2025443 PMAQI
22nd Jul 2025444 PMAQI
22nd Jul 2025515 PMAQI
22nd Jul 2025396 PMAQI
22nd Jul 2025347 PMAQI
22nd Jul 2025348 PMAQI
22nd Jul 2025299 PMAQI
22nd Jul 20253010 PMAQI
22nd Jul 20253111 PMAQI
23rd Jul 20252912 AMAQI
23rd Jul 2025301 AMAQI
23rd Jul 2025372 AMAQI
23rd Jul 2025363 AMAQI
31°C28/35°C
23rd Jul 2025364 AMAQI
23rd Jul 2025365 AMAQI
23rd Jul 2025366 AMAQI
23rd Jul 2025367 AMAQI
23rd Jul 2025368 AMAQI
23rd Jul 2025269 AMAQI
23rd Jul 20252510 AMAQI
23rd Jul 20252911 AMAQI
23rd Jul 20253212 PMAQI
23rd Jul 2025501 PMAQI
23rd Jul 2025532 PMAQI
23rd Jul 2025573 PMAQI
23rd Jul 2025504 PMAQI
23rd Jul 2025485 PMAQI
23rd Jul 2025446 PMAQI
23rd Jul 2025397 PMAQI
23rd Jul 2025318 PMAQI
23rd Jul 2025349 PMAQI
23rd Jul 20252810 PMAQI
23rd Jul 20252911 PMAQI
24th Jul 20252812 AMAQI
24th Jul 2025311 AMAQI
24th Jul 2025352 AMAQI
24th Jul 2025353 AMAQI
30°C27/34°C
24th Jul 2025354 AMAQI
24th Jul 2025365 AMAQI
24th Jul 2025376 AMAQI
24th Jul 2025377 AMAQI
24th Jul 2025378 AMAQI
24th Jul 2025309 AMAQI
24th Jul 20253210 AMAQI
24th Jul 20253711 AMAQI
24th Jul 20254012 PMAQI
24th Jul 2025541 PMAQI
24th Jul 2025602 PMAQI
24th Jul 2025653 PMAQI
24th Jul 2025604 PMAQI
24th Jul 2025545 PMAQI
24th Jul 2025486 PMAQI
24th Jul 2025337 PMAQI
24th Jul 2025318 PMAQI
24th Jul 2025349 PMAQI
24th Jul 20253210 PMAQI
24th Jul 20253311 PMAQI
25th Jul 20253212 AMAQI
25th Jul 2025321 AMAQI
25th Jul 2025352 AMAQI
25th Jul 2025353 AMAQI
30°C27/35°C
25th Jul 2025374 AMAQI
25th Jul 2025395 AMAQI
25th Jul 2025386 AMAQI
25th Jul 2025397 AMAQI
25th Jul 2025398 AMAQI
25th Jul 2025319 AMAQI
25th Jul 20253810 AMAQI
25th Jul 20254911 AMAQI
25th Jul 20254112 PMAQI
25th Jul 2025491 PMAQI
25th Jul 2025392 PMAQI
25th Jul 2025353 PMAQI
25th Jul 2025304 PMAQI
25th Jul 2025285 PMAQI
25th Jul 2025306 PMAQI
25th Jul 2025347 PMAQI
25th Jul 2025248 PMAQI
25th Jul 2025329 PMAQI
25th Jul 20253210 PMAQI
25th Jul 20253011 PMAQI
26th Jul 20252812 AMAQI
26th Jul 2025301 AMAQI
26th Jul 2025362 AMAQI
26th Jul 2025363 AMAQI
30°C28/34°C
26th Jul 2025374 AMAQI
26th Jul 2025385 AMAQI
26th Jul 2025386 AMAQI
26th Jul 2025397 AMAQI
26th Jul 2025388 AMAQI
26th Jul 2025259 AMAQI
26th Jul 20252210 AMAQI
26th Jul 20253411 AMAQI
26th Jul 20254512 PMAQI
26th Jul 2025391 PMAQI
26th Jul 2025342 PMAQI
26th Jul 2025303 PMAQI
26th Jul 2025284 PMAQI
26th Jul 2025365 PMAQI
26th Jul 2025336 PMAQI
26th Jul 2025387 PMAQI
26th Jul 2025368 PMAQI
26th Jul 2025379 PMAQI
26th Jul 20253210 PMAQI
26th Jul 20253111 PMAQI
27th Jul 20252812 AMAQI
27th Jul 2025301 AMAQI
27th Jul 2025362 AMAQI
27th Jul 2025363 AMAQI
30°C28/34°C
27th Jul 2025364 AMAQI
27th Jul 2025365 AMAQI
27th Jul 2025366 AMAQI
27th Jul 2025367 AMAQI
27th Jul 2025368 AMAQI
27th Jul 2025289 AMAQI
27th Jul 20252710 AMAQI
27th Jul 20254011 AMAQI
27th Jul 20254012 PMAQI
27th Jul 2025301 PMAQI
27th Jul 2025242 PMAQI
27th Jul 2025253 PMAQI
27th Jul 2025284 PMAQI
27th Jul 2025275 PMAQI
27th Jul 2025286 PMAQI
27th Jul 2025247 PMAQI
27th Jul 2025348 PMAQI
27th Jul 2025319 PMAQI
27th Jul 20252710 PMAQI
27th Jul 20252711 PMAQI
28th Jul 20252612 AMAQI
28th Jul 2025291 AMAQI
28th Jul 2025352 AMAQI
28th Jul 2025363 AMAQI
30°C27/34°C
28th Jul 2025344 AMAQI
28th Jul 2025345 AMAQI
28th Jul 2025346 AMAQI
28th Jul 2025347 AMAQI
28th Jul 2025348 AMAQI
28th Jul 2025239 AMAQI
28th Jul 20252210 AMAQI
28th Jul 20253211 AMAQI
28th Jul 20254012 PMAQI
28th Jul 2025481 PMAQI
28th Jul 2025552 PMAQI
28th Jul 2025593 PMAQI
28th Jul 2025584 PMAQI
28th Jul 2025565 PMAQI
28th Jul 2025526 PMAQI
28th Jul 2025487 PMAQI
28th Jul 2025408 PMAQI
28th Jul 2025369 PMAQI
28th Jul 20253610 PMAQI
28th Jul 20253711 PMAQI
29th Jul 20253012 AMAQI
29th Jul 2025291 AMAQI
29th Jul 2025332 AMAQI
29th Jul 2025333 AMAQI
31°C28/37°C
29th Jul 2025364 AMAQI
29th Jul 2025365 AMAQI
29th Jul 2025366 AMAQI
29th Jul 2025367 AMAQI
29th Jul 2025368 AMAQI
29th Jul 2025249 AMAQI
29th Jul 20252510 AMAQI
29th Jul 20253311 AMAQI
29th Jul 20252712 PMAQI
29th Jul 2025391 PMAQI
29th Jul 2025512 PMAQI
29th Jul 2025533 PMAQI
29th Jul 2025424 PMAQI
29th Jul 2025505 PMAQI
29th Jul 2025366 PMAQI
29th Jul 2025287 PMAQI
29th Jul 2025298 PMAQI
29th Jul 2025299 PMAQI
29th Jul 20252810 PMAQI
29th Jul 20252511 PMAQI
30th Jul 20252512 AMAQI
30th Jul 2025261 AMAQI
30th Jul 2025292 AMAQI
30th Jul 2025343 AMAQI
31°C26/37°C
30th Jul 2025354 AMAQI
30th Jul 2025355 AMAQI
30th Jul 2025366 AMAQI
30th Jul 2025367 AMAQI
30th Jul 2025358 AMAQI
30th Jul 2025209 AMAQI
30th Jul 20251410 AMAQI
30th Jul 20252111 AMAQI
30th Jul 20252612 PMAQI
30th Jul 2025241 PMAQI
30th Jul 2025222 PMAQI
30th Jul 2025263 PMAQI
30th Jul 2025224 PMAQI
30th Jul 2025285 PMAQI
30th Jul 2025306 PMAQI
30th Jul 2025347 PMAQI
30th Jul 2025398 PMAQI
30th Jul 2025429 PMAQI
30th Jul 20253610 PMAQI
30th Jul 20253411 PMAQI
31st Jul 20253412 AMAQI
31st Jul 2025341 AMAQI
31st Jul 2025322 AMAQI
31st Jul 2025323 AMAQI
30°C26/35°C
31st Jul 2025324 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 20253511 AMAQI
31st Jul 20253812 PMAQI
31st Jul 2025321 PMAQI
31st Jul 2025322 PMAQI
31st Jul 2025283 PMAQI
31st Jul 2025224 PMAQI
31st Jul 2025245 PMAQI
31st Jul 2025266 PMAQI
31st Jul 2025247 PMAQI
31st Jul 2025298 PMAQI
31st Jul 2025289 PMAQI
31st Jul 20253010 PMAQI
31st Jul 20252711 PMAQI
1st Aug 20252712 AMAQI
1st Aug 2025291 AMAQI
1st Aug 2025342 AMAQI
1st Aug 2025363 AMAQI
29°C25/34°C
1st Aug 2025364 AMAQI
1st Aug 2025345 AMAQI
1st Aug 2025376 AMAQI
1st Aug 2025377 AMAQI
1st Aug 2025368 AMAQI
1st Aug 2025399 AMAQI
1st Aug 20253410 AMAQI
1st Aug 20254211 AMAQI
1st Aug 20254312 PMAQI
1st Aug 2025361 PMAQI
1st Aug 2025362 PMAQI
1st Aug 2025343 PMAQI
1st Aug 2025444 PMAQI
1st Aug 2025355 PMAQI
1st Aug 2025366 PMAQI
1st Aug 2025247 PMAQI
1st Aug 2025308 PMAQI
1st Aug 2025299 PMAQI
1st Aug 20253010 PMAQI
1st Aug 20252811 PMAQI
2nd Aug 20252812 AMAQI
2nd Aug 2025301 AMAQI
2nd Aug 2025372 AMAQI
2nd Aug 2025373 AMAQI
28°C25/32°C
2nd Aug 2025374 AMAQI
2nd Aug 2025395 AMAQI
2nd Aug 2025406 AMAQI
2nd Aug 2025387 AMAQI
2nd Aug 2025388 AMAQI
2nd Aug 2025349 AMAQI
2nd Aug 20253310 AMAQI
2nd Aug 20253811 AMAQI
2nd Aug 20254012 PMAQI
2nd Aug 2025441 PMAQI
2nd Aug 2025562 PMAQI
2nd Aug 2025543 PMAQI
2nd Aug 2025544 PMAQI
2nd Aug 2025515 PMAQI
2nd Aug 2025566 PMAQI
2nd Aug 2025557 PMAQI
2nd Aug 2025418 PMAQI
2nd Aug 2025379 PMAQI
2nd Aug 20253510 PMAQI
2nd Aug 20254211 PMAQI
3rd Aug 20253212 AMAQI
3rd Aug 2025351 AMAQI
3rd Aug 2025372 AMAQI
3rd Aug 2025373 AMAQI
30°C26/35°C
3rd Aug 2025394 AMAQI
3rd Aug 2025395 AMAQI
3rd Aug 2025386 AMAQI
3rd Aug 2025407 AMAQI
3rd Aug 2025388 AMAQI
3rd Aug 2025489 AMAQI
3rd Aug 20255510 AMAQI
3rd Aug 20255211 AMAQI
3rd Aug 20256212 PMAQI
3rd Aug 2025511 PMAQI
3rd Aug 2025562 PMAQI
3rd Aug 2025513 PMAQI
3rd Aug 2025494 PMAQI
3rd Aug 2025485 PMAQI
3rd Aug 2025516 PMAQI
3rd Aug 2025447 PMAQI
3rd Aug 2025468 PMAQI
3rd Aug 2025429 PMAQI
3rd Aug 20254410 PMAQI
3rd Aug 20254111 PMAQI
4th Aug 20254112 AMAQI
4th Aug 2025371 AMAQI
4th Aug 2025382 AMAQI
4th Aug 2025393 AMAQI
31°C27/36°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 20256910 AMAQI
4th Aug 20258311 AMAQI
4th Aug 20258112 PMAQI
4th Aug 2025901 PMAQI
4th Aug 2025942 PMAQI
4th Aug 2025863 PMAQI
4th Aug 2025904 PMAQI
4th Aug 2025885 PMAQI
4th Aug 2025816 PMAQI
4th Aug 2025747 PMAQI
4th Aug 2025688 PMAQI
4th Aug 2025599 PMAQI
4th Aug 20255610 PMAQI
4th Aug 20254811 PMAQI
5th Aug 20255512 AMAQI
5th Aug 2025421 AMAQI
5th Aug 2025402 AMAQI
5th Aug 2025403 AMAQI
31°C29/35°C
5th Aug 2025504 AMAQI
4 AM5th Aug 2025545 AMAQI
5th Aug 2025536 AMAQI
5th Aug 2025517 AMAQI
5th Aug 2025548 AMAQI
5th Aug 2025579 AMAQI
5th Aug 20256010 AMAQI
5th Aug 20255911 AMAQI
11 AM5th Aug 20256112 PMAQI
5th Aug 2025571 PMAQI
5th Aug 2025552 PMAQI
5th Aug 2025563 PMAQI
5th Aug 2025624 PMAQI
5th Aug 2025535 PMAQI
5th Aug 2025516 PMAQI
6 PM5th Aug 2025497 PMAQI
5th Aug 2025488 PMAQI
5th Aug 2025489 PMAQI
11 PM
3 AM
--°C/°C
Day time
Avg. Highest Time
12 PM - 6 PM
47AQI
7 hours / Day
210 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 12 PM to 6 PM (Avg. 47), while the lowest AQI was between 9 AM to 10 AM (Avg. 40).
Night time
Avg. Highest Time
12 AM - 11 PM
44AQI
9 hours / Day
270 hours / Month
Avg. Lowest Time
12 AM - 11 PM
44AQI
9 hours / Day
270 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 44), while the lowest AQI was between 12 AM to 11 PM (Avg. 44).
2025 Days Vs Air Quality
Katsushika, Matsudo, Chiba, Japan
2025
95%
206
5%
10
Total number of days with different AQI categories in last 217 days in 2025 (148 days remaining)
Good
206 DaysModerate
10 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2025, 95% 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
Katsushika, Matsudo, 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
28AQI
28AQI
2nd January 2025
27AQI
27AQI
3rd January 2025
24AQI
24AQI
4th January 2025
26AQI
26AQI
5th January 2025
24AQI
24AQI
6th January 2025
29AQI
29AQI
7th January 2025
25AQI
25AQI
8th January 2025
24AQI
24AQI
9th January 2025
25AQI
25AQI
10th January 2025
25AQI
25AQI
11th January 2025
24AQI
24AQI
12th January 2025
26AQI
26AQI
13th January 2025
28AQI
28AQI
14th January 2025
28AQI
28AQI
15th January 2025
32AQI
32AQI
16th January 2025
26AQI
26AQI
17th January 2025
30AQI
30AQI
18th January 2025
25AQI
25AQI
19th January 2025
31AQI
31AQI
20th January 2025
29AQI
29AQI
21st January 2025
32AQI
32AQI
22nd January 2025
31AQI
31AQI
23rd January 2025
33AQI
33AQI
24th January 2025
36AQI
36AQI
25th January 2025
33AQI
33AQI
26th January 2025
32AQI
32AQI
27th January 2025
27AQI
27AQI
28th January 2025
29AQI
29AQI
29th January 2025
27AQI
27AQI
30th January 2025
27AQI
27AQI
31st January 2025
27AQI
27AQI
1st February 2025
28AQI
28AQI
2nd February 2025
29AQI
29AQI
3rd February 2025
26AQI
26AQI
4th February 2025
30AQI
30AQI
5th February 2025
28AQI
28AQI
6th February 2025
26AQI
26AQI
7th February 2025
27AQI
27AQI
8th February 2025
29AQI
29AQI
9th February 2025
28AQI
28AQI
10th February 2025
26AQI
26AQI
11th February 2025
30AQI
30AQI
12th February 2025
28AQI
28AQI
13th February 2025
32AQI
32AQI
14th February 2025
28AQI
28AQI
15th February 2025
30AQI
30AQI
16th February 2025
33AQI
33AQI
17th February 2025
33AQI
33AQI
18th February 2025
30AQI
30AQI
19th February 2025
30AQI
30AQI
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
32AQI
32AQI
26th February 2025
34AQI
34AQI
27th February 2025
37AQI
37AQI
28th February 2025
41AQI
41AQI
1st March 2025
43AQI
43AQI
2nd March 2025
49AQI
49AQI
3rd March 2025
35AQI
35AQI
4th March 2025
34AQI
34AQI
5th March 2025
25AQI
25AQI
6th March 2025
31AQI
31AQI
7th March 2025
31AQI
31AQI
8th March 2025
31AQI
31AQI
9th March 2025
34AQI
34AQI
10th March 2025
33AQI
33AQI
11th March 2025
30AQI
30AQI
12th March 2025
35AQI
35AQI
13th March 2025
32AQI
32AQI
14th March 2025
26AQI
26AQI
15th March 2025
21AQI
21AQI
16th March 2025
19AQI
19AQI
17th March 2025
16AQI
16AQI
18th March 2025
16AQI
16AQI
19th March 2025
14AQI
14AQI
20th March 2025
17AQI
17AQI
21st March 2025
26AQI
26AQI
22nd March 2025
30AQI
30AQI
23rd March 2025
32AQI
32AQI
24th March 2025
30AQI
30AQI
25th March 2025
51AQI
51AQI
26th March 2025
64AQI
64AQI
27th March 2025
60AQI
60AQI
28th March 2025
40AQI
40AQI
29th March 2025
32AQI
32AQI
30th March 2025
38AQI
38AQI
31st March 2025
30AQI
30AQI
1st April 2025
25AQI
25AQI
2nd April 2025
21AQI
21AQI
3rd April 2025
18AQI
18AQI
4th April 2025
20AQI
20AQI
5th April 2025
18AQI
18AQI
6th April 2025
15AQI
15AQI
7th April 2025
17AQI
17AQI
8th April 2025
20AQI
20AQI
9th April 2025
17AQI
17AQI
10th April 2025
22AQI
22AQI
11th April 2025
22AQI
22AQI
12th April 2025
20AQI
20AQI
13th April 2025
19AQI
19AQI
14th April 2025
23AQI
23AQI
15th April 2025
21AQI
21AQI
16th April 2025
19AQI
19AQI
17th April 2025
24AQI
24AQI
18th April 2025
27AQI
27AQI
19th April 2025
33AQI
33AQI
20th April 2025
26AQI
26AQI
21st April 2025
23AQI
23AQI
22nd April 2025
21AQI
21AQI
23rd April 2025
16AQI
16AQI
24th April 2025
18AQI
18AQI
25th April 2025
20AQI
20AQI
26th April 2025
20AQI
20AQI
27th April 2025
21AQI
21AQI
28th April 2025
21AQI
21AQI
29th April 2025
15AQI
15AQI
30th April 2025
20AQI
20AQI
1st May 2025
19AQI
19AQI
2nd May 2025
17AQI
17AQI
3rd May 2025
16AQI
16AQI
4th May 2025
20AQI
20AQI
5th May 2025
18AQI
18AQI
6th May 2025
17AQI
17AQI
7th May 2025
15AQI
15AQI
8th May 2025
16AQI
16AQI
9th May 2025
17AQI
17AQI
10th May 2025
15AQI
15AQI
11th May 2025
17AQI
17AQI
12th May 2025
16AQI
16AQI
13th May 2025
17AQI
17AQI
14th May 2025
18AQI
18AQI
15th May 2025
19AQI
19AQI
16th May 2025
19AQI
19AQI
17th May 2025
19AQI
19AQI
18th May 2025
22AQI
22AQI
19th May 2025
21AQI
21AQI
20th May 2025
32AQI
32AQI
21st May 2025
27AQI
27AQI
22nd May 2025
25AQI
25AQI
23rd May 2025
21AQI
21AQI
24th May 2025
20AQI
20AQI
25th May 2025
17AQI
17AQI
26th May 2025
17AQI
17AQI
27th May 2025
16AQI
16AQI
28th May 2025
14AQI
14AQI
29th May 2025
16AQI
16AQI
30th May 2025
15AQI
15AQI
31st May 2025
13AQI
13AQI
1st June 2025
14AQI
14AQI
2nd June 2025
16AQI
16AQI
3rd June 2025
16AQI
16AQI
4th June 2025
18AQI
18AQI
5th June 2025
21AQI
21AQI
6th June 2025
21AQI
21AQI
7th June 2025
21AQI
21AQI
8th June 2025
26AQI
26AQI
9th June 2025
20AQI
20AQI
10th June 2025
21AQI
21AQI
11th June 2025
21AQI
21AQI
12th June 2025
23AQI
23AQI
13th June 2025
23AQI
23AQI
14th June 2025
20AQI
20AQI
15th June 2025
23AQI
23AQI
16th June 2025
22AQI
22AQI
17th June 2025
30AQI
30AQI
18th June 2025
26AQI
26AQI
19th June 2025
26AQI
26AQI
20th June 2025
24AQI
24AQI
21st June 2025
20AQI
20AQI
22nd June 2025
12AQI
12AQI
23rd June 2025
13AQI
13AQI
24th June 2025
13AQI
13AQI
25th June 2025
14AQI
14AQI
26th June 2025
15AQI
15AQI
27th June 2025
17AQI
17AQI
28th June 2025
16AQI
16AQI
29th June 2025
21AQI
21AQI
30th June 2025
37AQI
37AQI
1st July 2025
38AQI
38AQI
2nd July 2025
45AQI
45AQI
3rd July 2025
44AQI
44AQI
4th July 2025
47AQI
47AQI
5th July 2025
52AQI
52AQI
6th July 2025
69AQI
69AQI
7th July 2025
83AQI
83AQI
8th July 2025
81AQI
81AQI
9th July 2025
79AQI
79AQI
10th July 2025
57AQI
57AQI
11th July 2025
47AQI
47AQI
12th July 2025
50AQI
50AQI
13th July 2025
49AQI
49AQI
14th July 2025
40AQI
40AQI
15th July 2025
39AQI
39AQI
16th July 2025
39AQI
39AQI
17th July 2025
45AQI
45AQI
18th July 2025
37AQI
37AQI
19th July 2025
32AQI
32AQI
20th July 2025
33AQI
33AQI
21st July 2025
35AQI
35AQI
22nd July 2025
35AQI
35AQI
23rd July 2025
37AQI
37AQI
24th July 2025
39AQI
39AQI
25th July 2025
35AQI
35AQI
26th July 2025
34AQI
34AQI
27th July 2025
31AQI
31AQI
28th July 2025
39AQI
39AQI
29th July 2025
34AQI
34AQI
30th July 2025
30AQI
30AQI
31st July 2025
31AQI
31AQI
1st August 2025
34AQI
34AQI
2nd August 2025
41AQI
41AQI
3rd August 2025
44AQI
44AQI
4th August 2025
54AQI
54AQI
28AQI
30AQI
32AQI
21AQI
18AQI
20AQI
45AQI
43AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202528AQI
31
28
28
3
30
31
30
25
6
3
1
206
10
Highest AQI recorded in
July45AQI
Lowest AQI recorded in
May18AQI
202432AQI
30
1
29
30
1
29
1
31
30
29
2
31
30
31
29
1
31
360
6
Highest AQI recorded in
July39AQI
Lowest AQI recorded in
September25AQI
202330AQI
31
28
28
3
24
6
30
1
28
2
31
31
30
31
28
1
31
351
13
Highest AQI recorded in
April42AQI
Lowest AQI recorded in
August18AQI
202231AQI
31
20
1
30
1
15
2
31
28
2
20
1
1
29
29
2
30
30
1
294
10
Highest AQI recorded in
April37AQI
Lowest AQI recorded in
August21AQI
202125AQI
20
3
30
31
30
31
142
3
Highest AQI recorded in
August27AQI
Lowest AQI recorded in
November23AQI
202015AQI
13
21
18
30
31
31
8
152
Highest AQI recorded in
August20AQI
Lowest AQI recorded in
September10AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2024(Avg.)
32AQILeast Polluted Year Recorded
2020(Avg.)
15AQIKatsushika's annual 2025 AQI (28) shows an average percentage change of 14.9% (worsened AQI) compared to previous years: 2020 (15), 2021 (25), 2022 (31), 2023 (30), 2024 (32).
