Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Kohokudai, Abiko, 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+

February Air Quality Analysis

Kohokudai, Abiko, Chiba, Japan

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
16th Feb 2022
79AQI
Lowest AQI recorded on
6th Feb 2024
27AQI

Same Day Analysis (6th February):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 60 of Moderate air quality on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 5th Feb - 6th Feb 2026

Kohokudai, Abiko, Chiba, Japan

AQI
Day
Night
.

6 AM5th Feb 2026

4 PM

5 AM6th Feb 2026

Day time
Avg. Highest Time
8AM5th Feb

79AQI

Avg. Lowest Time
2PM5th Feb

42AQI

Night time
Avg. Highest Time
1AM6th Feb

82AQI

Avg. Lowest Time
6PM5th Feb

54AQI

In the last 24 hours,

Kohokudai's AQI reached its highest point of 82 at 1 AM during the Night, while the lowest point, 42, was recorded at 2 PM during the Day between 5th Feb and 6th Feb 2026.

Day & Night AQI Trend : Jan - Feb 2026

Kohokudai, Abiko, Chiba, Japan

JanFeb
08th - 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 - 06th06th
Day
Night
8th Jan 2026556 AMAQI
8th Jan 2026587 AMAQI
8th Jan 2026628 AMAQI
8th Jan 2026679 AMAQI
8th Jan 20264810 AMAQI
8th Jan 20262911 AMAQI
8th Jan 20262712 PMAQI
8th Jan 2026211 PMAQI
8th Jan 2026142 PMAQI
8th Jan 2026234 PMAQI
8th Jan 2026275 PMAQI
8th Jan 2026216 PMAQI
8th Jan 2026177 PMAQI
8th Jan 2026178 PMAQI
8th Jan 2026129 PMAQI
8th Jan 2026810 PMAQI
8th Jan 2026811 PMAQI
9th Jan 2026812 AMAQI
9th Jan 2026121 AMAQI
9th Jan 202682 AMAQI
9th Jan 202683 AMAQI
9th Jan 2026144 AMAQI
9th Jan 2026125 AMAQI

6°C3/10°C

9th Jan 2026106 AMAQI
9th Jan 2026107 AMAQI
9th Jan 2026108 AMAQI
9th Jan 202689 AMAQI
9th Jan 2026810 AMAQI
9th Jan 20261211 AMAQI
9th Jan 20261212 PMAQI
9th Jan 2026101 PMAQI
9th Jan 202682 PMAQI
9th Jan 202683 PMAQI
9th Jan 202684 PMAQI
9th Jan 2026145 PMAQI
9th Jan 2026216 PMAQI
9th Jan 2026277 PMAQI
9th Jan 2026278 PMAQI
9th Jan 2026259 PMAQI
9th Jan 20262710 PMAQI
9th Jan 20262711 PMAQI
10th Jan 20263112 AMAQI
10th Jan 2026271 AMAQI
10th Jan 2026272 AMAQI
10th Jan 2026333 AMAQI
10th Jan 2026384 AMAQI
10th Jan 2026295 AMAQI

5°C2/8°C

10th Jan 2026256 AMAQI
10th Jan 2026367 AMAQI
10th Jan 2026468 AMAQI
10th Jan 2026499 AMAQI
10th Jan 20264010 AMAQI
10th Jan 20263211 AMAQI
10th Jan 20263312 PMAQI
10th Jan 2026271 PMAQI
10th Jan 2026192 PMAQI
10th Jan 2026123 PMAQI
10th Jan 2026164 PMAQI
10th Jan 2026275 PMAQI
10th Jan 2026256 PMAQI
10th Jan 2026257 PMAQI
10th Jan 2026278 PMAQI
10th Jan 2026299 PMAQI
10th Jan 20263110 PMAQI
10th Jan 20264011 PMAQI
11th Jan 20263512 AMAQI
11th Jan 2026251 AMAQI
11th Jan 2026272 AMAQI
11th Jan 2026323 AMAQI
11th Jan 2026384 AMAQI
11th Jan 2026405 AMAQI

10°C5/14°C

11th Jan 2026386 AMAQI
11th Jan 2026258 AMAQI
11th Jan 2026439 AMAQI
11th Jan 20261910 AMAQI
11th Jan 20261911 AMAQI
11th Jan 20262312 PMAQI
11th Jan 2026211 PMAQI
11th Jan 2026382 PMAQI
11th Jan 2026463 PMAQI
11th Jan 2026364 PMAQI
11th Jan 2026405 PMAQI
11th Jan 2026316 PMAQI
11th Jan 2026297 PMAQI
11th Jan 2026258 PMAQI
11th Jan 2026259 PMAQI
11th Jan 20262310 PMAQI
11th Jan 20261611 PMAQI
12th Jan 20261412 AMAQI
12th Jan 2026141 AMAQI
12th Jan 2026122 AMAQI
12th Jan 2026173 AMAQI
12th Jan 2026124 AMAQI
12th Jan 2026125 AMAQI

10°C4/12°C

12th Jan 2026126 AMAQI
12th Jan 2026177 AMAQI
12th Jan 2026178 AMAQI
12th Jan 2026179 AMAQI
12th Jan 20261810 AMAQI
12th Jan 20261611 AMAQI
12th Jan 20262512 PMAQI
12th Jan 2026211 PMAQI
12th Jan 2026212 PMAQI
12th Jan 2026193 PMAQI
12th Jan 2026174 PMAQI
12th Jan 2026235 PMAQI
12th Jan 2026236 PMAQI
12th Jan 2026297 PMAQI
12th Jan 2026298 PMAQI
12th Jan 2026319 PMAQI
12th Jan 20263610 PMAQI
12th Jan 20263611 PMAQI
13th Jan 20262812 AMAQI
13th Jan 2026261 AMAQI
13th Jan 2026442 AMAQI
13th Jan 2026593 AMAQI
13th Jan 2026594 AMAQI
13th Jan 2026565 AMAQI

5°C2/7°C

13th Jan 2026586 AMAQI
13th Jan 2026507 AMAQI
13th Jan 2026408 AMAQI
13th Jan 2026469 AMAQI
13th Jan 20265310 AMAQI
13th Jan 20265211 AMAQI
13th Jan 20265012 PMAQI
13th Jan 2026441 PMAQI
13th Jan 2026462 PMAQI
13th Jan 2026363 PMAQI
13th Jan 2026384 PMAQI
13th Jan 2026335 PMAQI
13th Jan 2026276 PMAQI
13th Jan 2026237 PMAQI
13th Jan 2026298 PMAQI
13th Jan 2026279 PMAQI
13th Jan 20262710 PMAQI
13th Jan 20261711 PMAQI
14th Jan 20262112 AMAQI
14th Jan 2026191 AMAQI
14th Jan 2026142 AMAQI
14th Jan 2026123 AMAQI
14th Jan 2026124 AMAQI
14th Jan 2026105 AMAQI

9°C4/14°C

14th Jan 202686 AMAQI
14th Jan 2026107 AMAQI
14th Jan 2026128 AMAQI
14th Jan 2026129 AMAQI
14th Jan 20261010 AMAQI
14th Jan 20261011 AMAQI
14th Jan 20261212 PMAQI
14th Jan 2026101 PMAQI
14th Jan 2026122 PMAQI
14th Jan 2026143 PMAQI
14th Jan 2026104 PMAQI
14th Jan 2026125 PMAQI
14th Jan 2026106 PMAQI
14th Jan 2026127 PMAQI
14th Jan 2026128 PMAQI
14th Jan 2026179 PMAQI
14th Jan 20261410 PMAQI
14th Jan 20261411 PMAQI
15th Jan 20261912 AMAQI
15th Jan 2026171 AMAQI
15th Jan 2026172 AMAQI
15th Jan 2026143 AMAQI
15th Jan 2026124 AMAQI
15th Jan 2026125 AMAQI

8°C6/10°C

15th Jan 2026166 AMAQI
15th Jan 2026197 AMAQI
15th Jan 2026178 AMAQI
15th Jan 2026179 AMAQI
15th Jan 20262910 AMAQI
15th Jan 20263811 AMAQI
15th Jan 20262812 PMAQI
15th Jan 2026281 PMAQI
15th Jan 2026272 PMAQI
15th Jan 2026293 PMAQI
15th Jan 2026404 PMAQI
15th Jan 2026525 PMAQI
15th Jan 2026476 PMAQI
15th Jan 2026407 PMAQI
15th Jan 2026318 PMAQI
15th Jan 2026409 PMAQI
15th Jan 20264410 PMAQI
15th Jan 20264211 PMAQI
16th Jan 20263412 AMAQI
16th Jan 2026381 AMAQI
16th Jan 2026482 AMAQI
16th Jan 2026673 AMAQI
16th Jan 2026644 AMAQI
16th Jan 2026695 AMAQI

8°C4/10°C

16th Jan 2026706 AMAQI
16th Jan 2026707 AMAQI
16th Jan 2026648 AMAQI
16th Jan 2026609 AMAQI
16th Jan 20266310 AMAQI
16th Jan 20266811 AMAQI
16th Jan 20265112 PMAQI
16th Jan 2026461 PMAQI
16th Jan 2026322 PMAQI
16th Jan 2026213 PMAQI
16th Jan 2026214 PMAQI
16th Jan 2026255 PMAQI
16th Jan 2026276 PMAQI
16th Jan 2026367 PMAQI
16th Jan 2026298 PMAQI
16th Jan 2026319 PMAQI
16th Jan 20262910 PMAQI
16th Jan 20263611 PMAQI
17th Jan 20263612 AMAQI
17th Jan 2026331 AMAQI
17th Jan 2026332 AMAQI
17th Jan 2026313 AMAQI
17th Jan 2026294 AMAQI
17th Jan 2026365 AMAQI

11°C7/15°C

17th Jan 2026346 AMAQI
17th Jan 2026487 AMAQI
17th Jan 2026568 AMAQI
17th Jan 2026599 AMAQI
17th Jan 20265510 AMAQI
17th Jan 20265311 AMAQI
17th Jan 20265212 PMAQI
17th Jan 2026581 PMAQI
17th Jan 2026502 PMAQI
17th Jan 2026443 PMAQI
17th Jan 2026534 PMAQI
17th Jan 2026605 PMAQI
17th Jan 2026626 PMAQI
17th Jan 2026627 PMAQI
17th Jan 2026728 PMAQI
17th Jan 2026689 PMAQI
17th Jan 20266210 PMAQI
17th Jan 20265811 PMAQI
18th Jan 20265012 AMAQI
18th Jan 2026521 AMAQI
18th Jan 2026482 AMAQI
18th Jan 2026533 AMAQI
18th Jan 2026274 AMAQI
18th Jan 2026385 AMAQI

10°C8/14°C

18th Jan 2026276 AMAQI
18th Jan 2026277 AMAQI
18th Jan 2026258 AMAQI
18th Jan 2026239 AMAQI
18th Jan 20261010 AMAQI
18th Jan 20261011 AMAQI
18th Jan 20261212 PMAQI
18th Jan 2026201 PMAQI
18th Jan 2026273 PMAQI
18th Jan 2026314 PMAQI
18th Jan 2026335 PMAQI
18th Jan 2026316 PMAQI
18th Jan 2026237 PMAQI
18th Jan 2026218 PMAQI
18th Jan 2026239 PMAQI
18th Jan 20261610 PMAQI
18th Jan 20261411 PMAQI
19th Jan 20261912 AMAQI
19th Jan 2026191 AMAQI
19th Jan 2026212 AMAQI
19th Jan 2026213 AMAQI
19th Jan 2026294 AMAQI
19th Jan 2026275 AMAQI

8°C6/9°C

19th Jan 2026316 AMAQI
19th Jan 2026387 AMAQI
19th Jan 2026428 AMAQI
19th Jan 2026389 AMAQI
19th Jan 20264010 AMAQI
19th Jan 20264611 AMAQI
19th Jan 20265012 PMAQI
19th Jan 2026421 PMAQI
19th Jan 2026512 PMAQI
19th Jan 2026463 PMAQI
19th Jan 2026514 PMAQI
19th Jan 2026545 PMAQI
19th Jan 2026556 PMAQI
19th Jan 2026547 PMAQI
19th Jan 2026588 PMAQI
19th Jan 2026599 PMAQI
19th Jan 20266810 PMAQI
19th Jan 20267011 PMAQI
20th Jan 20267112 AMAQI
20th Jan 2026641 AMAQI
20th Jan 2026692 AMAQI
20th Jan 2026733 AMAQI
20th Jan 2026764 AMAQI
20th Jan 2026865 AMAQI

7°C6/8°C

20th Jan 2026886 AMAQI
20th Jan 2026767 AMAQI
20th Jan 2026718 AMAQI
20th Jan 2026759 AMAQI
20th Jan 20265310 AMAQI
20th Jan 20263411 AMAQI
20th Jan 20261612 PMAQI
20th Jan 2026121 PMAQI
20th Jan 2026102 PMAQI
20th Jan 202683 PMAQI
20th Jan 202684 PMAQI
20th Jan 2026105 PMAQI
20th Jan 202686 PMAQI
20th Jan 2026107 PMAQI
20th Jan 2026128 PMAQI
20th Jan 2026109 PMAQI
20th Jan 2026810 PMAQI
20th Jan 2026811 PMAQI
21st Jan 2026812 AMAQI
21st Jan 202681 AMAQI
21st Jan 202682 AMAQI
21st Jan 202683 AMAQI
21st Jan 202684 AMAQI
21st Jan 202685 AMAQI

7°C3/11°C

21st Jan 2026106 AMAQI
21st Jan 2026107 AMAQI
21st Jan 202688 AMAQI
21st Jan 202689 AMAQI
21st Jan 20261210 AMAQI
21st Jan 2026812 PMAQI
21st Jan 202681 PMAQI
21st Jan 202682 PMAQI
21st Jan 202683 PMAQI
21st Jan 202684 PMAQI
21st Jan 202685 PMAQI
21st Jan 2026126 PMAQI
21st Jan 2026177 PMAQI
21st Jan 2026178 PMAQI
21st Jan 2026299 PMAQI
21st Jan 20262910 PMAQI
21st Jan 20262911 PMAQI
22nd Jan 20262512 AMAQI
22nd Jan 2026211 AMAQI
22nd Jan 2026142 AMAQI
22nd Jan 2026143 AMAQI
22nd Jan 2026104 AMAQI
22nd Jan 2026125 AMAQI

4°C2/6°C

22nd Jan 2026106 AMAQI
22nd Jan 2026107 AMAQI
22nd Jan 2026188 AMAQI
22nd Jan 2026239 AMAQI
22nd Jan 20262110 AMAQI
22nd Jan 20262311 AMAQI
22nd Jan 20263312 PMAQI
22nd Jan 2026331 PMAQI
22nd Jan 2026402 PMAQI
22nd Jan 2026643 PMAQI
22nd Jan 2026104 PMAQI
22nd Jan 2026245 PMAQI
22nd Jan 2026226 PMAQI
22nd Jan 2026127 PMAQI
22nd Jan 2026248 PMAQI
22nd Jan 2026419 PMAQI
22nd Jan 20263010 PMAQI
22nd Jan 20262211 PMAQI
23rd Jan 20261012 AMAQI
23rd Jan 2026261 AMAQI
23rd Jan 2026382 AMAQI
23rd Jan 2026323 AMAQI
23rd Jan 2026324 AMAQI
23rd Jan 2026425 AMAQI

3°C1/5°C

23rd Jan 2026286 AMAQI
23rd Jan 2026217 AMAQI
23rd Jan 2026368 AMAQI
23rd Jan 2026529 AMAQI
23rd Jan 20265610 AMAQI
23rd Jan 20262811 AMAQI
23rd Jan 20263312 PMAQI
23rd Jan 2026341 PMAQI
23rd Jan 2026122 PMAQI
23rd Jan 2026333 PMAQI
23rd Jan 2026284 PMAQI
23rd Jan 2026465 PMAQI
23rd Jan 2026566 PMAQI
23rd Jan 2026597 PMAQI
23rd Jan 2026468 PMAQI
23rd Jan 2026469 PMAQI
23rd Jan 20264910 PMAQI
23rd Jan 20264711 PMAQI
24th Jan 20265212 AMAQI
24th Jan 2026531 AMAQI
24th Jan 2026462 AMAQI
24th Jan 2026503 AMAQI
24th Jan 2026664 AMAQI
24th Jan 2026625 AMAQI

4°C1/7°C

24th Jan 2026476 AMAQI
24th Jan 2026507 AMAQI
24th Jan 2026528 AMAQI
24th Jan 2026569 AMAQI
24th Jan 20265310 AMAQI
24th Jan 20263811 AMAQI
24th Jan 20262712 PMAQI
24th Jan 2026251 PMAQI
24th Jan 2026192 PMAQI
24th Jan 2026173 PMAQI
24th Jan 2026234 PMAQI
24th Jan 2026235 PMAQI
24th Jan 2026196 PMAQI
24th Jan 2026177 PMAQI
24th Jan 2026198 PMAQI
24th Jan 2026179 PMAQI
24th Jan 20262110 PMAQI
24th Jan 20262511 PMAQI
25th Jan 20261712 AMAQI
25th Jan 2026211 AMAQI
25th Jan 2026192 AMAQI
25th Jan 2026173 AMAQI
25th Jan 2026174 AMAQI
25th Jan 2026175 AMAQI

6°C2/10°C

25th Jan 2026196 AMAQI
25th Jan 2026177 AMAQI
25th Jan 2026178 AMAQI
25th Jan 2026219 AMAQI
25th Jan 20262310 AMAQI
25th Jan 20262111 AMAQI
25th Jan 20261912 PMAQI
25th Jan 2026121 PMAQI
25th Jan 2026122 PMAQI
25th Jan 2026123 PMAQI
25th Jan 2026124 PMAQI
25th Jan 2026125 PMAQI
25th Jan 2026106 PMAQI
25th Jan 202687 PMAQI
25th Jan 2026128 PMAQI
25th Jan 2026109 PMAQI
25th Jan 2026810 PMAQI
25th Jan 20261011 PMAQI
26th Jan 2026612 AMAQI
26th Jan 202681 AMAQI
26th Jan 202682 AMAQI
26th Jan 202683 AMAQI
26th Jan 202684 AMAQI
26th Jan 202685 AMAQI

4°C1/6°C

26th Jan 202686 AMAQI
26th Jan 2026107 AMAQI
26th Jan 2026128 AMAQI
26th Jan 2026219 AMAQI
26th Jan 20261811 AMAQI
26th Jan 20264012 PMAQI
26th Jan 2026361 PMAQI
26th Jan 202682 PMAQI
26th Jan 202683 PMAQI
26th Jan 2026174 PMAQI
26th Jan 202685 PMAQI
26th Jan 2026126 PMAQI
26th Jan 2026207 PMAQI
26th Jan 2026258 PMAQI
26th Jan 2026239 PMAQI
26th Jan 20263810 PMAQI
26th Jan 20263611 PMAQI
27th Jan 20263912 AMAQI
27th Jan 2026441 AMAQI
27th Jan 2026512 AMAQI
27th Jan 2026543 AMAQI
27th Jan 2026394 AMAQI
27th Jan 2026365 AMAQI

4°C1/7°C

27th Jan 2026396 AMAQI
27th Jan 2026407 AMAQI
27th Jan 2026388 AMAQI
27th Jan 2026409 AMAQI
27th Jan 20264610 AMAQI
27th Jan 20263211 AMAQI
27th Jan 20263612 PMAQI
27th Jan 2026331 PMAQI
27th Jan 2026442 PMAQI
27th Jan 2026383 PMAQI
27th Jan 2026334 PMAQI
27th Jan 2026285 PMAQI
27th Jan 2026326 PMAQI
27th Jan 2026367 PMAQI
27th Jan 2026508 PMAQI
27th Jan 2026469 PMAQI
27th Jan 20264310 PMAQI
27th Jan 20264211 PMAQI
28th Jan 20264312 AMAQI
28th Jan 2026441 AMAQI
28th Jan 2026342 AMAQI
28th Jan 2026503 AMAQI
28th Jan 2026474 AMAQI
28th Jan 2026625 AMAQI

5°C2/8°C

28th Jan 2026656 AMAQI
28th Jan 2026667 AMAQI
28th Jan 2026668 AMAQI
28th Jan 2026549 AMAQI
28th Jan 20263610 AMAQI
28th Jan 20262911 AMAQI
28th Jan 2026812 PMAQI
28th Jan 202681 PMAQI
28th Jan 202682 PMAQI
28th Jan 202683 PMAQI
28th Jan 2026104 PMAQI
28th Jan 2026125 PMAQI
28th Jan 2026146 PMAQI
28th Jan 2026127 PMAQI
28th Jan 202688 PMAQI
28th Jan 2026129 PMAQI
28th Jan 20261710 PMAQI
29th Jan 20261012 AMAQI
29th Jan 2026121 AMAQI
29th Jan 2026122 AMAQI
29th Jan 2026173 AMAQI
29th Jan 2026194 AMAQI
29th Jan 2026195 AMAQI

6°C3/8°C

29th Jan 2026216 AMAQI
29th Jan 2026237 AMAQI
29th Jan 2026238 AMAQI
29th Jan 2026259 AMAQI
29th Jan 20262910 AMAQI
29th Jan 20262711 AMAQI
29th Jan 20261612 PMAQI
29th Jan 2026122 PMAQI
29th Jan 2026123 PMAQI
29th Jan 2026124 PMAQI
29th Jan 2026175 PMAQI
29th Jan 2026166 PMAQI
29th Jan 2026147 PMAQI
29th Jan 2026108 PMAQI
29th Jan 2026109 PMAQI
29th Jan 20261210 PMAQI
29th Jan 20261211 PMAQI
30th Jan 20261212 AMAQI
30th Jan 2026121 AMAQI
30th Jan 2026212 AMAQI
30th Jan 2026143 AMAQI
30th Jan 2026164 AMAQI
30th Jan 2026235 AMAQI

4°C2/7°C

30th Jan 2026236 AMAQI
30th Jan 2026368 AMAQI
30th Jan 2026429 AMAQI
30th Jan 20266010 AMAQI
30th Jan 20265611 AMAQI
30th Jan 20261212 PMAQI
30th Jan 2026421 PMAQI
30th Jan 2026372 PMAQI
30th Jan 2026183 PMAQI
30th Jan 202684 PMAQI
30th Jan 2026205 PMAQI
30th Jan 2026206 PMAQI
30th Jan 2026207 PMAQI
30th Jan 2026168 PMAQI
30th Jan 2026149 PMAQI
30th Jan 20262010 PMAQI
30th Jan 20263011 PMAQI
31st Jan 20262012 AMAQI
31st Jan 2026351 AMAQI
31st Jan 2026402 AMAQI
31st Jan 2026343 AMAQI
31st Jan 2026404 AMAQI
31st Jan 2026455 AMAQI

4°C2/7°C

31st Jan 2026516 AMAQI
31st Jan 2026427 AMAQI
31st Jan 2026398 AMAQI
31st Jan 2026689 AMAQI
31st Jan 20268210 AMAQI
31st Jan 20264011 AMAQI
31st Jan 20264012 PMAQI
31st Jan 202681 PMAQI
31st Jan 2026362 PMAQI
31st Jan 2026293 PMAQI
31st Jan 2026484 PMAQI
31st Jan 2026325 PMAQI
31st Jan 2026226 PMAQI
31st Jan 2026488 PMAQI
31st Jan 2026399 PMAQI
31st Jan 20262310 PMAQI
31st Jan 20262511 PMAQI
1st Feb 20262712 AMAQI
1st Feb 2026281 AMAQI
1st Feb 2026302 AMAQI
1st Feb 2026323 AMAQI
1st Feb 2026474 AMAQI
1st Feb 2026685 AMAQI

5°C2/7°C

1st Feb 2026406 AMAQI
1st Feb 2026587 AMAQI
1st Feb 2026408 AMAQI
1st Feb 2026659 AMAQI
1st Feb 20268210 AMAQI
1st Feb 20265611 AMAQI
1st Feb 20262112 PMAQI
1st Feb 2026341 PMAQI
1st Feb 2026282 PMAQI
1st Feb 2026343 PMAQI
1st Feb 2026264 PMAQI
1st Feb 2026315 PMAQI
1st Feb 2026386 PMAQI
1st Feb 2026367 PMAQI
1st Feb 2026438 PMAQI
1st Feb 2026499 PMAQI
1st Feb 20263710 PMAQI
1st Feb 20263611 PMAQI
2nd Feb 20264212 AMAQI
2nd Feb 2026421 AMAQI
2nd Feb 2026382 AMAQI
2nd Feb 2026363 AMAQI
2nd Feb 2026664 AMAQI
2nd Feb 2026745 AMAQI

6°C3/9°C

2nd Feb 2026586 AMAQI
2nd Feb 2026627 AMAQI
2nd Feb 2026308 AMAQI
2nd Feb 2026569 AMAQI
2nd Feb 20267410 AMAQI
2nd Feb 20266211 AMAQI
2nd Feb 20263812 PMAQI
2nd Feb 2026421 PMAQI
2nd Feb 2026242 PMAQI
2nd Feb 2026323 PMAQI
2nd Feb 2026494 PMAQI
2nd Feb 2026365 PMAQI
2nd Feb 2026426 PMAQI
2nd Feb 2026347 PMAQI
2nd Feb 2026328 PMAQI
2nd Feb 2026379 PMAQI
2nd Feb 20261410 PMAQI
2nd Feb 20264011 PMAQI
3rd Feb 20262912 AMAQI
3rd Feb 2026281 AMAQI
3rd Feb 2026212 AMAQI
3rd Feb 2026323 AMAQI
3rd Feb 2026404 AMAQI
3rd Feb 2026305 AMAQI

6°C4/10°C

3rd Feb 2026256 AMAQI
3rd Feb 2026347 AMAQI
3rd Feb 2026258 AMAQI
3rd Feb 2026309 AMAQI
3rd Feb 20265310 AMAQI
3rd Feb 20262411 AMAQI
3rd Feb 20262612 PMAQI
3rd Feb 2026171 PMAQI
3rd Feb 2026222 PMAQI
3rd Feb 202683 PMAQI
3rd Feb 2026285 PMAQI
3rd Feb 2026326 PMAQI
3rd Feb 2026347 PMAQI
3rd Feb 2026368 PMAQI
3rd Feb 2026489 PMAQI
3rd Feb 20262910 PMAQI
3rd Feb 20264011 PMAQI
4th Feb 20264212 AMAQI
4th Feb 2026331 AMAQI
4th Feb 2026362 AMAQI
4th Feb 2026483 AMAQI
4th Feb 2026504 AMAQI
4th Feb 2026545 AMAQI

6°C3/9°C

4th Feb 2026446 AMAQI
4th Feb 2026467 AMAQI
4th Feb 2026488 AMAQI
4th Feb 2026489 AMAQI
4th Feb 20265210 AMAQI
4th Feb 20264911 AMAQI
4th Feb 20263612 PMAQI
4th Feb 2026211 PMAQI
4th Feb 2026232 PMAQI
4th Feb 2026363 PMAQI
4th Feb 2026274 PMAQI
4th Feb 2026285 PMAQI
4th Feb 2026356 PMAQI
4th Feb 2026487 PMAQI
4th Feb 2026518 PMAQI
4th Feb 2026469 PMAQI
4th Feb 20265810 PMAQI
4th Feb 20265211 PMAQI
5th Feb 20266712 AMAQI
5th Feb 2026631 AMAQI
5th Feb 2026552 AMAQI
5th Feb 2026623 AMAQI
5th Feb 2026584 AMAQI
5th Feb 2026625 AMAQI

7°C4/10°C

5th Feb 2026746 AMAQI
5th Feb 2026787 AMAQI
5th Feb 2026798 AMAQI
5th Feb 2026769 AMAQI
5th Feb 20266510 AMAQI
5th Feb 20266011 AMAQI
5th Feb 20265512 PMAQI
5th Feb 2026531 PMAQI
5th Feb 2026422 PMAQI
5th Feb 2026443 PMAQI
5th Feb 2026544 PMAQI
5th Feb 2026565 PMAQI
5th Feb 2026546 PMAQI
5th Feb 2026557 PMAQI
5th Feb 2026628 PMAQI
5th Feb 2026719 PMAQI
5th Feb 20266910 PMAQI
5th Feb 20266911 PMAQI
6th Feb 20267412 AMAQI
6th Feb 2026821 AMAQI
6th Feb 2026762 AMAQI
6th Feb 2026803 AMAQI
6th Feb 2026824 AMAQI
6th Feb 2026765 AMAQI

9°C5/12°C

6th Feb 2026746 AMAQI
6 AM
6th Feb 2026767 AMAQI
6th Feb 2026788 AMAQI
6th Feb 2026609 AMAQI
6th Feb 20264410 AMAQI
6th Feb 20265111 AMAQI
11 AM
6th Feb 2026601 PMAQI
6th Feb 2026502 PMAQI
6th Feb 2026483 PMAQI
6th Feb 2026494 PMAQI
4 PM
6th Feb 2026475 PMAQI
6th Feb 2026606 PMAQI
6th Feb 2026627 PMAQI
6th Feb 2026598 PMAQI
6th Feb 2026469 PMAQI
6th Feb 20262710 PMAQI
6th Feb 20261911 PMAQI
11 PM
5 AM

10°C6/14°C

Day time
Avg. Highest Time
9 AM - 10 AM

43AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
2 PM - 4 PM

26AQI

3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 AM to 10 AM (Avg. 43), while the lowest AQI was between 2 PM to 4 PM (Avg. 26).
Night time
Avg. Highest Time
5 AM

39AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
5 PM - 6 PM

29AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 5 AM (Avg. 39), while the lowest AQI was between 5 PM to 6 PM (Avg. 29).

2026 Days Vs Air Quality

Kohokudai, Abiko, Chiba, Japan

2026

95%

35

5%

2

Total number of days with different AQI categories in last 38 days in 2026 (327 days remaining)

Good
35 Days
Moderate
2 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 95%

Health Risk Level:

Very Low

In 2026, 95% of 38 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

Kohokudai, Abiko, Chiba, Japan

AQI levels in 2026

AQI (US)
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 2026
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
1st January 2026
12AQI (US)
2nd January 2026
23AQI (US)
3rd January 2026
18AQI (US)
4th January 2026
24AQI (US)
5th January 2026
44AQI (US)
6th January 2026
15AQI (US)
7th January 2026
34AQI (US)
8th January 2026
36AQI (US)
9th January 2026
14AQI (US)
10th January 2026
30AQI (US)
11th January 2026
30AQI (US)
12th January 2026
20AQI (US)
13th January 2026
40AQI (US)
14th January 2026
12AQI (US)
15th January 2026
28AQI (US)
16th January 2026
46AQI (US)
17th January 2026
50AQI (US)
18th January 2026
28AQI (US)
19th January 2026
43AQI (US)
20th January 2026
40AQI (US)
21st January 2026
12AQI (US)
22nd January 2026
23AQI (US)
23rd January 2026
37AQI (US)
24th January 2026
37AQI (US)
25th January 2026
15AQI (US)
26th January 2026
17AQI (US)
27th January 2026
40AQI (US)
28th January 2026
31AQI (US)
29th January 2026
17AQI (US)
30th January 2026
25AQI (US)
31st January 2026
39AQI (US)
1st February 2026
41AQI (US)
2nd February 2026
44AQI (US)
3rd February 2026
30AQI (US)
4th February 2026
42AQI (US)
5th February 2026
62AQI (US)
6th February 2026
60AQI (US)
7th February 2026
8th February 2026
9th February 2026
10th February 2026
11th February 2026
12th February 2026
13th February 2026
14th February 2026
15th February 2026
16th February 2026
17th February 2026
18th February 2026
19th February 2026
20th February 2026
21st February 2026
22nd February 2026
23rd February 2026
24th February 2026
25th February 2026
26th February 2026
27th February 2026
28th February 2026
1st March 2026
2nd March 2026
3rd March 2026
4th March 2026
5th March 2026
6th March 2026
7th March 2026
8th March 2026
9th March 2026
10th March 2026
11th March 2026
12th March 2026
13th March 2026
14th March 2026
15th March 2026
16th March 2026
17th March 2026
18th March 2026
19th March 2026
20th March 2026
21st March 2026
22nd March 2026
23rd March 2026
24th March 2026
25th March 2026
26th March 2026
27th March 2026
28th March 2026
29th March 2026
30th March 2026
31st March 2026
1st April 2026
2nd April 2026
3rd April 2026
4th April 2026
5th April 2026
6th April 2026
7th April 2026
8th April 2026
9th April 2026
10th April 2026
11th April 2026
12th April 2026
13th April 2026
14th April 2026
15th April 2026
16th April 2026
17th April 2026
18th April 2026
19th April 2026
20th April 2026
21st April 2026
22nd April 2026
23rd April 2026
24th April 2026
25th April 2026
26th April 2026
27th April 2026
28th April 2026
29th April 2026
30th April 2026
1st May 2026
2nd May 2026
3rd May 2026
4th May 2026
5th May 2026
6th May 2026
7th May 2026
8th May 2026
9th May 2026
10th May 2026
11th May 2026
12th May 2026
13th May 2026
14th May 2026
15th May 2026
16th May 2026
17th May 2026
18th May 2026
19th May 2026
20th May 2026
21st May 2026
22nd May 2026
23rd May 2026
24th May 2026
25th May 2026
26th May 2026
27th May 2026
28th May 2026
29th May 2026
30th May 2026
31st May 2026
1st June 2026
2nd June 2026
3rd June 2026
4th June 2026
5th June 2026
6th June 2026
7th June 2026
8th June 2026
9th June 2026
10th June 2026
11th June 2026
12th June 2026
13th June 2026
14th June 2026
15th June 2026
16th June 2026
17th June 2026
18th June 2026
19th June 2026
20th June 2026
21st June 2026
22nd June 2026
23rd June 2026
24th June 2026
25th June 2026
26th June 2026
27th June 2026
28th June 2026
29th June 2026
30th June 2026
1st July 2026
2nd July 2026
3rd July 2026
4th July 2026
5th July 2026
6th July 2026
7th July 2026
8th July 2026
9th July 2026
10th July 2026
11th July 2026
12th July 2026
13th July 2026
14th July 2026
15th July 2026
16th July 2026
17th July 2026
18th July 2026
19th July 2026
20th July 2026
21st July 2026
22nd July 2026
23rd July 2026
24th July 2026
25th July 2026
26th July 2026
27th July 2026
28th July 2026
29th July 2026
30th July 2026
31st July 2026
1st August 2026
2nd August 2026
3rd August 2026
4th August 2026
5th August 2026
6th August 2026
7th August 2026
8th August 2026
9th August 2026
10th August 2026
11th August 2026
12th August 2026
13th August 2026
14th August 2026
15th August 2026
16th August 2026
17th August 2026
18th August 2026
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
30th September 2026
1st October 2026
2nd October 2026
3rd October 2026
4th October 2026
5th October 2026
6th October 2026
7th October 2026
8th October 2026
9th October 2026
10th October 2026
11th October 2026
12th October 2026
13th October 2026
14th October 2026
15th October 2026
16th October 2026
17th October 2026
18th October 2026
19th October 2026
20th October 2026
21st October 2026
22nd October 2026
23rd October 2026
24th October 2026
25th October 2026
26th October 2026
27th October 2026
28th October 2026
29th October 2026
30th October 2026
31st October 2026
1st November 2026
2nd November 2026
3rd November 2026
4th November 2026
5th November 2026
6th November 2026
7th November 2026
8th November 2026
9th November 2026
10th November 2026
11th November 2026
12th November 2026
13th November 2026
14th November 2026
15th November 2026
16th November 2026
17th November 2026
18th November 2026
19th November 2026
20th November 2026
21st November 2026
22nd November 2026
23rd November 2026
24th November 2026
25th November 2026
26th November 2026
27th November 2026
28th November 2026
29th November 2026
30th November 2026
1st December 2026
2nd December 2026
3rd December 2026
4th December 2026
5th December 2026
6th December 2026
7th December 2026
8th December 2026
9th December 2026
10th December 2026
11th December 2026
12th December 2026
13th December 2026
14th December 2026
15th December 2026
16th December 2026
17th December 2026
18th December 2026
19th December 2026
20th December 2026
21st December 2026
22nd December 2026
23rd December 2026
24th December 2026
25th December 2026
26th December 2026
27th December 2026
28th December 2026
29th December 2026
30th December 2026
31st December 2026

28AQI (US)

47AQI (US)

No. of days

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

202631AQI (US)

31
4
2
35
2

Highest AQI (US) recorded in

February

47AQI (US)

Lowest AQI (US) recorded in

January

28AQI (US)

202540AQI (US)

28
3
27
1
26
5
27
3
30
1
29
1
23
8
23
8
30
14
17
17
13
15
15
1
289
75
1

Highest AQI (US) recorded in

December

49AQI (US)

Lowest AQI (US) recorded in

May

33AQI (US)

202437AQI (US)

24
7
25
4
23
8
24
6
27
4
28
2
22
9
30
1
29
1
30
1
27
3
30
1
319
47

Highest AQI (US) recorded in

July

46AQI (US)

Lowest AQI (US) recorded in

August

28AQI (US)

202338AQI (US)

24
6
1
22
6
27
4
25
5
30
1
25
5
29
2
31
30
31
19
10
20
11
313
50
1

Highest AQI (US) recorded in

December

46AQI (US)

Lowest AQI (US) recorded in

August

24AQI (US)

202241AQI (US)

19
11
10
11
17
14
13
5
27
4
24
6
20
2
1
28
28
3
22
8
25
6
234
70

Highest AQI (US) recorded in

February

52AQI (US)

Lowest AQI (US) recorded in

August

25AQI (US)

202144AQI (US)

16
13
1
17
11
21
10
27
3
23
8
26
4
27
4
25
6
27
3
23
8
19
11
16
15
267
96
1

Highest AQI (US) recorded in

December

53AQI (US)

Lowest AQI (US) recorded in

August

36AQI (US)

202041AQI (US)

10
3
18
3
18
23
7
31
18
13
18
1
26
5
16
14
19
12
197
58

Highest AQI (US) recorded in

November

52AQI (US)

Lowest AQI (US) recorded in

September

28AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2021(Avg.)
44AQI (US)
Least Polluted Year Recorded
2026(Avg.)
31AQI (US)

Kohokudai's annual 2026 AQI (US) (31) shows an average percentage change of -21.9% (improved AQI (US)) compared to previous years: 2020 (41), 2021 (44), 2022 (41), 2023 (38), 2024 (37), 2025 (40).