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HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Chuocho, Tainai, Niigata, 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

Chuocho, Tainai, Niigata, Japan

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
30th Aug 2023
56AQI
Lowest AQI recorded on
14th Aug 2026
13AQI

Same Day Analysis (15th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 14 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.

Day & Night AQI Trend: 14th Aug - 15th Aug 2026

Chuocho, Tainai, Niigata, Japan

AQI
Day
Night
.

4 AM14th Aug 2026

6 PM

3 AM15th Aug 2026

Day time
Avg. Highest Time
4AM14th Aug

17AQI

Avg. Lowest Time
6PM14th Aug

12AQI

Night time
Avg. Highest Time
1AM15th Aug

14AQI

Avg. Lowest Time
3AM15th Aug

12AQI

In the last 24 hours,

Chuocho's AQI reached its highest point of 17 at 4 AM during the Day, while the lowest point, 12, was recorded at 3 AM during the Night between 14th Aug and 15th Aug 2026.

Day & Night AQI Trend : Jul - Aug 2026

Chuocho, Tainai, Niigata, Japan

JulAug
17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th
Day
Night
17th Jul 2026264 AMAQI
17th Jul 2026285 AMAQI
17th Jul 2026286 AMAQI
17th Jul 2026277 AMAQI
17th Jul 2026248 AMAQI
17th Jul 2026269 AMAQI
17th Jul 20262710 AMAQI
17th Jul 20262711 AMAQI
17th Jul 20262412 PMAQI
17th Jul 2026241 PMAQI
17th Jul 2026222 PMAQI
17th Jul 2026223 PMAQI
17th Jul 2026384 PMAQI
17th Jul 2026315 PMAQI
17th Jul 2026336 PMAQI
17th Jul 2026317 PMAQI
17th Jul 2026338 PMAQI
17th Jul 2026299 PMAQI
17th Jul 20263110 PMAQI
17th Jul 20263311 PMAQI
18th Jul 20262912 AMAQI
18th Jul 2026331 AMAQI
18th Jul 2026332 AMAQI
18th Jul 2026333 AMAQI

25°C23/29°C

18th Jul 2026334 AMAQI
18th Jul 2026295 AMAQI
18th Jul 2026316 AMAQI
18th Jul 2026297 AMAQI
18th Jul 2026258 AMAQI
18th Jul 2026279 AMAQI
18th Jul 20262310 AMAQI
18th Jul 20262511 AMAQI
18th Jul 20262112 PMAQI
18th Jul 2026211 PMAQI
18th Jul 2026212 PMAQI
18th Jul 2026213 PMAQI
18th Jul 2026214 PMAQI
18th Jul 2026215 PMAQI
18th Jul 2026216 PMAQI
18th Jul 2026217 PMAQI
18th Jul 2026238 PMAQI
18th Jul 2026239 PMAQI
18th Jul 20262110 PMAQI
18th Jul 20262111 PMAQI
19th Jul 20262312 AMAQI
19th Jul 2026211 AMAQI
19th Jul 2026212 AMAQI
19th Jul 2026233 AMAQI

26°C23/30°C

19th Jul 2026254 AMAQI
19th Jul 2026215 AMAQI
19th Jul 2026216 AMAQI
19th Jul 2026237 AMAQI
19th Jul 2026198 AMAQI
19th Jul 2026219 AMAQI
19th Jul 20262110 AMAQI
19th Jul 20261911 AMAQI
19th Jul 20262312 PMAQI
19th Jul 2026231 PMAQI
19th Jul 2026212 PMAQI
19th Jul 2026253 PMAQI
19th Jul 2026234 PMAQI
19th Jul 2026255 PMAQI
19th Jul 2026256 PMAQI
19th Jul 2026257 PMAQI
19th Jul 2026258 PMAQI
19th Jul 2026299 PMAQI
19th Jul 20263110 PMAQI
19th Jul 20263311 PMAQI
20th Jul 20263312 AMAQI
20th Jul 2026331 AMAQI
20th Jul 2026362 AMAQI
20th Jul 2026383 AMAQI

26°C23/29°C

20th Jul 2026384 AMAQI
20th Jul 2026425 AMAQI
20th Jul 2026386 AMAQI
20th Jul 2026427 AMAQI
20th Jul 2026428 AMAQI
20th Jul 2026409 AMAQI
20th Jul 20264610 AMAQI
20th Jul 20264811 AMAQI
20th Jul 20265012 PMAQI
20th Jul 2026531 PMAQI
20th Jul 2026622 PMAQI
20th Jul 2026563 PMAQI
20th Jul 2026564 PMAQI
20th Jul 2026575 PMAQI
20th Jul 2026586 PMAQI
20th Jul 2026597 PMAQI
20th Jul 2026598 PMAQI
20th Jul 2026679 PMAQI
20th Jul 20266510 PMAQI
20th Jul 20266411 PMAQI
21st Jul 20266212 AMAQI
21st Jul 2026631 AMAQI
21st Jul 2026602 AMAQI
21st Jul 2026603 AMAQI

27°C24/29°C

21st Jul 2026644 AMAQI
21st Jul 2026645 AMAQI
21st Jul 2026646 AMAQI
21st Jul 2026627 AMAQI
21st Jul 2026648 AMAQI
21st Jul 2026559 AMAQI
21st Jul 20265810 AMAQI
21st Jul 20265811 AMAQI
21st Jul 2026601 PMAQI
21st Jul 2026582 PMAQI
21st Jul 2026553 PMAQI
21st Jul 2026544 PMAQI
21st Jul 2026515 PMAQI
21st Jul 2026526 PMAQI
21st Jul 2026887 PMAQI
21st Jul 2026508 PMAQI
21st Jul 2026509 PMAQI
21st Jul 20264810 PMAQI
21st Jul 20264611 PMAQI
22nd Jul 20264412 AMAQI
22nd Jul 2026461 AMAQI
22nd Jul 2026362 AMAQI
22nd Jul 2026333 AMAQI

26°C24/28°C

22nd Jul 2026384 AMAQI
22nd Jul 2026385 AMAQI
22nd Jul 2026336 AMAQI
22nd Jul 2026407 AMAQI
22nd Jul 2026428 AMAQI
22nd Jul 2026429 AMAQI
22nd Jul 20265010 AMAQI
22nd Jul 20265111 AMAQI
22nd Jul 20265412 PMAQI
22nd Jul 2026871 PMAQI
22nd Jul 2026802 PMAQI
22nd Jul 2026733 PMAQI
22nd Jul 2026754 PMAQI
22nd Jul 2026605 PMAQI
22nd Jul 2026586 PMAQI
22nd Jul 2026507 PMAQI
22nd Jul 2026528 PMAQI
22nd Jul 2026609 PMAQI
22nd Jul 20265410 PMAQI
22nd Jul 20265311 PMAQI
23rd Jul 20263812 AMAQI
23rd Jul 2026501 AMAQI
23rd Jul 2026582 AMAQI
23rd Jul 2026423 AMAQI

26°C24/29°C

23rd Jul 2026424 AMAQI
23rd Jul 2026465 AMAQI
23rd Jul 2026406 AMAQI
23rd Jul 2026317 AMAQI
23rd Jul 2026218 AMAQI
23rd Jul 2026259 AMAQI
23rd Jul 20263310 AMAQI
23rd Jul 20262111 AMAQI
23rd Jul 20262512 PMAQI
23rd Jul 2026271 PMAQI
23rd Jul 2026212 PMAQI
23rd Jul 2026213 PMAQI
23rd Jul 2026174 PMAQI
23rd Jul 2026235 PMAQI
23rd Jul 2026236 PMAQI
23rd Jul 2026147 PMAQI
23rd Jul 2026178 PMAQI
23rd Jul 2026259 PMAQI
23rd Jul 20262110 PMAQI
23rd Jul 20262111 PMAQI
24th Jul 20262112 AMAQI
24th Jul 2026271 AMAQI
24th Jul 2026172 AMAQI
24th Jul 2026253 AMAQI

26°C24/28°C

24th Jul 2026254 AMAQI
24th Jul 2026255 AMAQI
24th Jul 2026236 AMAQI
24th Jul 2026257 AMAQI
24th Jul 2026238 AMAQI
24th Jul 2026299 AMAQI
24th Jul 20263110 AMAQI
24th Jul 20264211 AMAQI
24th Jul 20264212 PMAQI
24th Jul 2026291 PMAQI
24th Jul 2026212 PMAQI
24th Jul 2026253 PMAQI
24th Jul 2026254 PMAQI
24th Jul 2026255 PMAQI
24th Jul 2026276 PMAQI
24th Jul 2026237 PMAQI
24th Jul 2026258 PMAQI
24th Jul 2026259 PMAQI
24th Jul 20262310 PMAQI
24th Jul 20262111 PMAQI
25th Jul 20262112 AMAQI
25th Jul 2026251 AMAQI
25th Jul 2026292 AMAQI
25th Jul 2026293 AMAQI

25°C23/26°C

25th Jul 2026294 AMAQI
25th Jul 2026295 AMAQI
25th Jul 2026296 AMAQI
25th Jul 2026317 AMAQI
25th Jul 2026298 AMAQI
25th Jul 2026279 AMAQI
25th Jul 20262510 AMAQI
25th Jul 20262511 AMAQI
25th Jul 20262512 PMAQI
25th Jul 2026211 PMAQI
25th Jul 2026212 PMAQI
25th Jul 2026213 PMAQI
25th Jul 2026254 PMAQI
25th Jul 2026235 PMAQI
25th Jul 2026236 PMAQI
25th Jul 2026237 PMAQI
25th Jul 2026258 PMAQI
25th Jul 2026299 PMAQI
25th Jul 20262910 PMAQI
25th Jul 20262711 PMAQI
26th Jul 20262312 AMAQI
26th Jul 2026291 AMAQI
26th Jul 2026252 AMAQI
26th Jul 2026253 AMAQI

25°C23/26°C

26th Jul 2026234 AMAQI
26th Jul 2026215 AMAQI
26th Jul 2026216 AMAQI
26th Jul 2026217 AMAQI
26th Jul 2026258 AMAQI
26th Jul 2026259 AMAQI
26th Jul 20262310 AMAQI
26th Jul 20262511 AMAQI
26th Jul 20262112 PMAQI
26th Jul 2026251 PMAQI
26th Jul 2026252 PMAQI
26th Jul 2026213 PMAQI
26th Jul 2026174 PMAQI
26th Jul 2026255 PMAQI
26th Jul 2026236 PMAQI
26th Jul 2026197 PMAQI
26th Jul 2026198 PMAQI
26th Jul 2026179 PMAQI
26th Jul 20261910 PMAQI
26th Jul 20261911 PMAQI
27th Jul 20261712 AMAQI
27th Jul 2026171 AMAQI
27th Jul 2026142 AMAQI
27th Jul 2026193 AMAQI

23°C22/25°C

27th Jul 2026174 AMAQI
27th Jul 2026175 AMAQI
27th Jul 2026176 AMAQI
27th Jul 2026177 AMAQI
27th Jul 2026148 AMAQI
27th Jul 2026179 AMAQI
27th Jul 20261410 AMAQI
27th Jul 20261711 AMAQI
27th Jul 20261712 PMAQI
27th Jul 2026171 PMAQI
27th Jul 2026172 PMAQI
27th Jul 2026213 PMAQI
27th Jul 2026144 PMAQI
27th Jul 2026175 PMAQI
27th Jul 2026146 PMAQI
27th Jul 2026197 PMAQI
27th Jul 2026168 PMAQI
27th Jul 2026179 PMAQI
27th Jul 20261710 PMAQI
27th Jul 20261711 PMAQI
28th Jul 20261912 AMAQI
28th Jul 2026171 AMAQI
28th Jul 2026232 AMAQI
28th Jul 2026213 AMAQI

24°C22/26°C

28th Jul 2026254 AMAQI
28th Jul 2026255 AMAQI
28th Jul 2026256 AMAQI
28th Jul 2026257 AMAQI
28th Jul 2026258 AMAQI
28th Jul 2026259 AMAQI
28th Jul 20262510 AMAQI
28th Jul 20262511 AMAQI
28th Jul 20262112 PMAQI
28th Jul 2026291 PMAQI
28th Jul 2026272 PMAQI
28th Jul 2026253 PMAQI
28th Jul 2026294 PMAQI
28th Jul 2026235 PMAQI
28th Jul 2026256 PMAQI
28th Jul 2026257 PMAQI
28th Jul 2026218 PMAQI
28th Jul 2026259 PMAQI
28th Jul 20262510 PMAQI
28th Jul 20262111 PMAQI
29th Jul 20262312 AMAQI
29th Jul 2026251 AMAQI
29th Jul 2026332 AMAQI
29th Jul 2026253 AMAQI

24°C22/27°C

29th Jul 2026314 AMAQI
29th Jul 2026295 AMAQI
29th Jul 2026256 AMAQI
29th Jul 2026257 AMAQI
29th Jul 2026298 AMAQI
29th Jul 2026299 AMAQI
29th Jul 20262510 AMAQI
29th Jul 20262111 AMAQI
29th Jul 20262112 PMAQI
29th Jul 2026211 PMAQI
29th Jul 2026232 PMAQI
29th Jul 2026233 PMAQI
29th Jul 2026234 PMAQI
29th Jul 2026215 PMAQI
29th Jul 2026216 PMAQI
29th Jul 2026237 PMAQI
29th Jul 2026218 PMAQI
29th Jul 2026219 PMAQI
29th Jul 20262110 PMAQI
29th Jul 20262111 PMAQI
30th Jul 20262112 AMAQI
30th Jul 2026211 AMAQI
30th Jul 2026232 AMAQI
30th Jul 2026253 AMAQI

24°C23/25°C

30th Jul 2026254 AMAQI
30th Jul 2026275 AMAQI
30th Jul 2026256 AMAQI
30th Jul 2026297 AMAQI
30th Jul 2026318 AMAQI
30th Jul 2026339 AMAQI
30th Jul 20263810 AMAQI
30th Jul 20263611 AMAQI
30th Jul 20264212 PMAQI
30th Jul 2026401 PMAQI
30th Jul 2026442 PMAQI
30th Jul 2026423 PMAQI
30th Jul 2026464 PMAQI
30th Jul 2026445 PMAQI
30th Jul 2026446 PMAQI
30th Jul 2026447 PMAQI
30th Jul 2026488 PMAQI
30th Jul 2026449 PMAQI
30th Jul 20265010 PMAQI
30th Jul 20264811 PMAQI
31st Jul 20265012 AMAQI
31st Jul 2026481 AMAQI
31st Jul 2026482 AMAQI
31st Jul 2026503 AMAQI

25°C23/27°C

31st Jul 2026484 AMAQI
31st Jul 2026485 AMAQI
31st Jul 2026466 AMAQI
31st Jul 2026467 AMAQI
31st Jul 2026468 AMAQI
31st Jul 2026429 AMAQI
31st Jul 20263810 AMAQI
31st Jul 20263811 AMAQI
31st Jul 20263812 PMAQI
31st Jul 2026331 PMAQI
31st Jul 2026312 PMAQI
31st Jul 2026333 PMAQI
31st Jul 2026334 PMAQI
31st Jul 2026295 PMAQI
31st Jul 2026276 PMAQI
31st Jul 2026277 PMAQI
31st Jul 2026258 PMAQI
31st Jul 2026259 PMAQI
31st Jul 20262710 PMAQI
31st Jul 20262911 PMAQI
1st Aug 20263312 AMAQI
1st Aug 2026361 AMAQI
1st Aug 2026312 AMAQI
1st Aug 2026313 AMAQI

24°C23/26°C

1st Aug 2026314 AMAQI
1st Aug 2026335 AMAQI
1st Aug 2026336 AMAQI
1st Aug 2026317 AMAQI
1st Aug 2026338 AMAQI
1st Aug 2026339 AMAQI
1st Aug 20263810 AMAQI
1st Aug 20263611 AMAQI
1st Aug 20263812 PMAQI
1st Aug 2026361 PMAQI
1st Aug 2026402 PMAQI
1st Aug 2026403 PMAQI
1st Aug 2026424 PMAQI
1st Aug 2026405 PMAQI
1st Aug 2026406 PMAQI
1st Aug 2026387 PMAQI
1st Aug 2026428 PMAQI
1st Aug 2026429 PMAQI
1st Aug 20264210 PMAQI
1st Aug 20264011 PMAQI
2nd Aug 20264612 AMAQI
2nd Aug 2026421 AMAQI
2nd Aug 2026442 AMAQI
2nd Aug 2026423 AMAQI

25°C24/27°C

2nd Aug 2026444 AMAQI
2nd Aug 2026445 AMAQI
2nd Aug 2026486 AMAQI
2nd Aug 2026487 AMAQI
2nd Aug 2026468 AMAQI
2nd Aug 2026469 AMAQI
2nd Aug 20264610 AMAQI
2nd Aug 20264611 AMAQI
2nd Aug 20265012 PMAQI
2nd Aug 2026461 PMAQI
2nd Aug 2026442 PMAQI
2nd Aug 2026423 PMAQI
2nd Aug 2026424 PMAQI
2nd Aug 2026405 PMAQI
2nd Aug 2026366 PMAQI
2nd Aug 2026367 PMAQI
2nd Aug 2026318 PMAQI
2nd Aug 2026319 PMAQI
2nd Aug 20263110 PMAQI
2nd Aug 20262711 PMAQI
3rd Aug 20262512 AMAQI
3rd Aug 2026251 AMAQI
3rd Aug 2026252 AMAQI
3rd Aug 2026253 AMAQI

25°C23/26°C

3rd Aug 2026234 AMAQI
3rd Aug 2026255 AMAQI
3rd Aug 2026256 AMAQI
3rd Aug 2026277 AMAQI
3rd Aug 2026258 AMAQI
3rd Aug 2026259 AMAQI
3rd Aug 20262510 AMAQI
3rd Aug 20262311 AMAQI
3rd Aug 20261712 PMAQI
3rd Aug 2026191 PMAQI
3rd Aug 2026232 PMAQI
3rd Aug 2026213 PMAQI
3rd Aug 2026214 PMAQI
3rd Aug 2026215 PMAQI
3rd Aug 2026216 PMAQI
3rd Aug 2026177 PMAQI
3rd Aug 2026198 PMAQI
3rd Aug 2026169 PMAQI
3rd Aug 20265110 PMAQI
3rd Aug 20262111 PMAQI
4th Aug 20262112 AMAQI
4th Aug 2026191 AMAQI
4th Aug 2026212 AMAQI
4th Aug 2026233 AMAQI

24°C21/28°C

4th Aug 2026214 AMAQI
4th Aug 2026215 AMAQI
4th Aug 2026256 AMAQI
4th Aug 2026217 AMAQI
4th Aug 2026218 AMAQI
4th Aug 2026239 AMAQI
4th Aug 20262110 AMAQI
4th Aug 20262111 AMAQI
4th Aug 20262112 PMAQI
4th Aug 2026211 PMAQI
4th Aug 2026232 PMAQI
4th Aug 2026253 PMAQI
4th Aug 2026254 PMAQI
4th Aug 2026255 PMAQI
4th Aug 2026256 PMAQI
4th Aug 2026257 PMAQI
4th Aug 2026278 PMAQI
4th Aug 2026259 PMAQI
4th Aug 20262510 PMAQI
4th Aug 20262911 PMAQI
5th Aug 20263112 AMAQI
5th Aug 2026331 AMAQI
5th Aug 2026332 AMAQI
5th Aug 2026313 AMAQI

24°C20/29°C

5th Aug 2026334 AMAQI
5th Aug 2026335 AMAQI
5th Aug 2026336 AMAQI
5th Aug 2026317 AMAQI
5th Aug 2026368 AMAQI
5th Aug 2026369 AMAQI
5th Aug 20263610 AMAQI
5th Aug 20263611 AMAQI
5th Aug 20263812 PMAQI
5th Aug 2026361 PMAQI
5th Aug 2026382 PMAQI
5th Aug 2026383 PMAQI
5th Aug 2026364 PMAQI
5th Aug 2026385 PMAQI
5th Aug 2026406 PMAQI
5th Aug 2026387 PMAQI
5th Aug 2026368 PMAQI
5th Aug 2026369 PMAQI
5th Aug 20263810 PMAQI
5th Aug 20263811 PMAQI
6th Aug 20263812 AMAQI
6th Aug 2026381 AMAQI
6th Aug 2026362 AMAQI
6th Aug 2026383 AMAQI

25°C20/29°C

6th Aug 2026364 AMAQI
6th Aug 2026335 AMAQI
6th Aug 2026366 AMAQI
6th Aug 2026337 AMAQI
6th Aug 2026338 AMAQI
6th Aug 2026369 AMAQI
6th Aug 20263310 AMAQI
6th Aug 20263611 AMAQI
6th Aug 20263312 PMAQI
6th Aug 2026361 PMAQI
6th Aug 2026362 PMAQI
6th Aug 2026363 PMAQI
6th Aug 2026344 PMAQI
6th Aug 2026365 PMAQI
6th Aug 2026336 PMAQI
6th Aug 2026337 PMAQI
6th Aug 2026338 PMAQI
6th Aug 2026369 PMAQI
6th Aug 20263610 PMAQI
6th Aug 20263611 PMAQI
7th Aug 20263312 AMAQI
7th Aug 2026331 AMAQI
7th Aug 2026362 AMAQI
7th Aug 2026383 AMAQI

26°C22/30°C

7th Aug 2026334 AMAQI
7th Aug 2026365 AMAQI
7th Aug 2026316 AMAQI
7th Aug 2026337 AMAQI
7th Aug 2026368 AMAQI
7th Aug 2026339 AMAQI
7th Aug 20263310 AMAQI
7th Aug 20263611 AMAQI
7th Aug 20264612 PMAQI
7th Aug 2026481 PMAQI
7th Aug 2026402 PMAQI
7th Aug 2026383 PMAQI
7th Aug 2026384 PMAQI
7th Aug 2026365 PMAQI
7th Aug 2026366 PMAQI
7th Aug 2026337 PMAQI
7th Aug 2026388 PMAQI
7th Aug 2026409 PMAQI
7th Aug 20264010 PMAQI
7th Aug 20264011 PMAQI
8th Aug 20264212 AMAQI
8th Aug 2026401 AMAQI
8th Aug 2026382 AMAQI
8th Aug 2026403 AMAQI

27°C24/30°C

8th Aug 2026384 AMAQI
8th Aug 2026385 AMAQI
8th Aug 2026406 AMAQI
8th Aug 2026447 AMAQI
8th Aug 2026318 AMAQI
8th Aug 2026429 AMAQI
8th Aug 20265110 AMAQI
8th Aug 20264611 AMAQI
8th Aug 20265312 PMAQI
8th Aug 2026521 PMAQI
8th Aug 2026512 PMAQI
8th Aug 2026383 PMAQI
8th Aug 2026424 PMAQI
8th Aug 2026425 PMAQI
8th Aug 2026236 PMAQI
8th Aug 2026297 PMAQI
8th Aug 2026368 PMAQI
8th Aug 2026369 PMAQI
8th Aug 20262910 PMAQI
8th Aug 20262111 PMAQI
9th Aug 20262712 AMAQI
9th Aug 2026271 AMAQI
9th Aug 2026292 AMAQI
9th Aug 2026213 AMAQI

26°C24/29°C

9th Aug 2026234 AMAQI
9th Aug 2026255 AMAQI
9th Aug 2026236 AMAQI
9th Aug 2026237 AMAQI
9th Aug 2026218 AMAQI
9th Aug 2026279 AMAQI
9th Aug 20262110 AMAQI
9th Aug 20262511 AMAQI
9th Aug 20262512 PMAQI
9th Aug 2026331 PMAQI
9th Aug 2026292 PMAQI
9th Aug 2026253 PMAQI
9th Aug 2026274 PMAQI
9th Aug 2026235 PMAQI
9th Aug 2026276 PMAQI
9th Aug 2026277 PMAQI
9th Aug 2026258 PMAQI
9th Aug 2026239 PMAQI
9th Aug 20262510 PMAQI
9th Aug 20262511 PMAQI
10th Aug 20262712 AMAQI
10th Aug 2026211 AMAQI
10th Aug 2026232 AMAQI
10th Aug 2026213 AMAQI

25°C24/26°C

10th Aug 2026254 AMAQI
10th Aug 2026215 AMAQI
10th Aug 2026216 AMAQI
10th Aug 2026257 AMAQI
10th Aug 2026258 AMAQI
10th Aug 2026259 AMAQI
10th Aug 20262510 AMAQI
10th Aug 20262911 AMAQI
10th Aug 20262512 PMAQI
10th Aug 2026251 PMAQI
10th Aug 2026252 PMAQI
10th Aug 2026253 PMAQI
10th Aug 2026254 PMAQI
10th Aug 2026255 PMAQI
10th Aug 2026256 PMAQI
10th Aug 2026237 PMAQI
10th Aug 2026238 PMAQI
10th Aug 2026239 PMAQI
10th Aug 20262510 PMAQI
10th Aug 20262311 PMAQI
11th Aug 20262312 AMAQI
11th Aug 2026251 AMAQI
11th Aug 2026232 AMAQI
11th Aug 2026233 AMAQI

25°C23/27°C

11th Aug 2026254 AMAQI
11th Aug 2026255 AMAQI
11th Aug 2026256 AMAQI
11th Aug 2026257 AMAQI
11th Aug 2026258 AMAQI
11th Aug 2026239 AMAQI
11th Aug 20262510 AMAQI
11th Aug 20262511 AMAQI
11th Aug 20262512 PMAQI
11th Aug 2026271 PMAQI
11th Aug 2026252 PMAQI
11th Aug 2026253 PMAQI
11th Aug 2026274 PMAQI
11th Aug 2026255 PMAQI
11th Aug 2026256 PMAQI
11th Aug 2026257 PMAQI
11th Aug 2026258 PMAQI
11th Aug 2026239 PMAQI
11th Aug 20262110 PMAQI
11th Aug 20262111 PMAQI
12th Aug 20262112 AMAQI
12th Aug 2026211 AMAQI
12th Aug 2026212 AMAQI
12th Aug 2026213 AMAQI

23°C20/24°C

12th Aug 2026214 AMAQI
12th Aug 2026215 AMAQI
12th Aug 2026216 AMAQI
12th Aug 2026147 AMAQI
12th Aug 2026178 AMAQI
12th Aug 2026199 AMAQI
12th Aug 20261910 AMAQI
12th Aug 20261911 AMAQI
12th Aug 20261712 PMAQI
12th Aug 2026171 PMAQI
12th Aug 2026162 PMAQI
12th Aug 2026123 PMAQI
12th Aug 2026174 PMAQI
12th Aug 2026175 PMAQI
12th Aug 2026146 PMAQI
12th Aug 2026147 PMAQI
12th Aug 2026128 PMAQI
12th Aug 2026179 PMAQI
12th Aug 20262110 PMAQI
12th Aug 20261411 PMAQI
13th Aug 20261712 AMAQI
13th Aug 2026171 AMAQI
13th Aug 2026192 AMAQI
13th Aug 2026163 AMAQI

25°C22/29°C

13th Aug 2026174 AMAQI
13th Aug 2026125 AMAQI
13th Aug 2026146 AMAQI
13th Aug 2026177 AMAQI
13th Aug 2026178 AMAQI
13th Aug 2026149 AMAQI
13th Aug 20261710 AMAQI
13th Aug 20261911 AMAQI
13th Aug 20261412 PMAQI
13th Aug 2026171 PMAQI
13th Aug 2026172 PMAQI
13th Aug 2026143 PMAQI
13th Aug 2026144 PMAQI
13th Aug 2026145 PMAQI
13th Aug 2026176 PMAQI
13th Aug 2026177 PMAQI
13th Aug 2026148 PMAQI
13th Aug 2026149 PMAQI
13th Aug 20262110 PMAQI
13th Aug 20261611 PMAQI
14th Aug 20261612 AMAQI
14th Aug 2026141 AMAQI
14th Aug 2026172 AMAQI
14th Aug 2026173 AMAQI

27°C24/31°C

14th Aug 2026174 AMAQI
14th Aug 2026145 AMAQI
14th Aug 2026126 AMAQI
14th Aug 2026147 AMAQI
14th Aug 2026148 AMAQI
14th Aug 2026129 AMAQI
14th Aug 20261710 AMAQI
14th Aug 20261211 AMAQI
14th Aug 20261212 PMAQI
14th Aug 2026121 PMAQI
14th Aug 2026122 PMAQI
14th Aug 2026123 PMAQI
14th Aug 2026124 PMAQI
14th Aug 2026125 PMAQI
14th Aug 2026126 PMAQI
14th Aug 2026127 PMAQI
14th Aug 2026128 PMAQI
14th Aug 2026129 PMAQI
14th Aug 20261210 PMAQI
14th Aug 20261211 PMAQI
15th Aug 20261212 AMAQI
15th Aug 2026141 AMAQI
15th Aug 2026122 AMAQI
15th Aug 2026123 AMAQI

26°C23/30°C

15th Aug 2026124 AMAQI
4 AM
15th Aug 2026125 AMAQI
15th Aug 2026126 AMAQI
15th Aug 2026127 AMAQI
15th Aug 2026148 AMAQI
15th Aug 2026149 AMAQI
15th Aug 20261410 AMAQI
15th Aug 20261411 AMAQI
11 AM
15th Aug 20261212 PMAQI
15th Aug 2026121 PMAQI
15th Aug 2026122 PMAQI
15th Aug 2026123 PMAQI
15th Aug 2026144 PMAQI
15th Aug 2026145 PMAQI
15th Aug 2026176 PMAQI
6 PM
15th Aug 2026177 PMAQI
15th Aug 2026178 PMAQI
15th Aug 2026179 PMAQI
15th Aug 20261710 PMAQI
15th Aug 20261911 PMAQI
11 PM
3 AM

26°C22/30°C

Day time
Avg. Highest Time
1 PM

32AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
8 AM

28AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 PM to 1 PM (Avg. 32), while the lowest AQI was between 8 AM to 8 AM (Avg. 28).
Night time
Avg. Highest Time
10 PM

31AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
8 PM

28AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 10 PM to 10 PM (Avg. 31), while the lowest AQI was between 8 PM to 8 PM (Avg. 28).

2026 Days Vs Air Quality

Chuocho, Tainai, Niigata, Japan

2026

86%

195

14%

32

Total number of days with different AQI categories in last 227 days in 2026 (138 days remaining)

Good
195 Days
Moderate
32 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 86%

Health Risk Level:

Low

In 2026, 86% of 227 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

Chuocho, Tainai, Niigata, 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
21AQI (US)
2nd January 2026
17AQI (US)
3rd January 2026
16AQI (US)
4th January 2026
26AQI (US)
5th January 2026
22AQI (US)
6th January 2026
25AQI (US)
7th January 2026
24AQI (US)
8th January 2026
21AQI (US)
9th January 2026
20AQI (US)
10th January 2026
22AQI (US)
11th January 2026
36AQI (US)
12th January 2026
26AQI (US)
13th January 2026
24AQI (US)
14th January 2026
24AQI (US)
15th January 2026
35AQI (US)
16th January 2026
41AQI (US)
17th January 2026
49AQI (US)
18th January 2026
32AQI (US)
19th January 2026
44AQI (US)
20th January 2026
25AQI (US)
21st January 2026
21AQI (US)
22nd January 2026
21AQI (US)
23rd January 2026
34AQI (US)
24th January 2026
32AQI (US)
25th January 2026
39AQI (US)
26th January 2026
28AQI (US)
27th January 2026
34AQI (US)
28th January 2026
33AQI (US)
29th January 2026
26AQI (US)
30th January 2026
38AQI (US)
31st January 2026
41AQI (US)
1st February 2026
32AQI (US)
2nd February 2026
35AQI (US)
3rd February 2026
31AQI (US)
4th February 2026
36AQI (US)
5th February 2026
42AQI (US)
6th February 2026
42AQI (US)
7th February 2026
25AQI (US)
8th February 2026
22AQI (US)
9th February 2026
38AQI (US)
10th February 2026
47AQI (US)
11th February 2026
55AQI (US)
12th February 2026
36AQI (US)
13th February 2026
44AQI (US)
14th February 2026
65AQI (US)
15th February 2026
51AQI (US)
16th February 2026
44AQI (US)
17th February 2026
24AQI (US)
18th February 2026
36AQI (US)
19th February 2026
33AQI (US)
20th February 2026
35AQI (US)
21st February 2026
45AQI (US)
22nd February 2026
42AQI (US)
23rd February 2026
58AQI (US)
24th February 2026
45AQI (US)
25th February 2026
38AQI (US)
26th February 2026
36AQI (US)
27th February 2026
40AQI (US)
28th February 2026
35AQI (US)
1st March 2026
38AQI (US)
2nd March 2026
65AQI (US)
3rd March 2026
44AQI (US)
4th March 2026
64AQI (US)
5th March 2026
62AQI (US)
6th March 2026
54AQI (US)
7th March 2026
46AQI (US)
8th March 2026
46AQI (US)
9th March 2026
46AQI (US)
10th March 2026
56AQI (US)
11th March 2026
54AQI (US)
12th March 2026
62AQI (US)
13th March 2026
36AQI (US)
14th March 2026
46AQI (US)
15th March 2026
60AQI (US)
16th March 2026
55AQI (US)
17th March 2026
62AQI (US)
18th March 2026
51AQI (US)
19th March 2026
38AQI (US)
20th March 2026
39AQI (US)
21st March 2026
57AQI (US)
22nd March 2026
43AQI (US)
23rd March 2026
50AQI (US)
24th March 2026
69AQI (US)
25th March 2026
51AQI (US)
26th March 2026
24AQI (US)
27th March 2026
23AQI (US)
28th March 2026
49AQI (US)
29th March 2026
52AQI (US)
30th March 2026
62AQI (US)
31st March 2026
48AQI (US)
1st April 2026
33AQI (US)
2nd April 2026
20AQI (US)
3rd April 2026
49AQI (US)
4th April 2026
49AQI (US)
5th April 2026
37AQI (US)
6th April 2026
23AQI (US)
7th April 2026
26AQI (US)
8th April 2026
24AQI (US)
9th April 2026
33AQI (US)
10th April 2026
44AQI (US)
11th April 2026
39AQI (US)
12th April 2026
30AQI (US)
13th April 2026
31AQI (US)
14th April 2026
36AQI (US)
15th April 2026
42AQI (US)
16th April 2026
32AQI (US)
17th April 2026
35AQI (US)
18th April 2026
35AQI (US)
19th April 2026
33AQI (US)
20th April 2026
34AQI (US)
21st April 2026
45AQI (US)
22nd April 2026
32AQI (US)
23rd April 2026
31AQI (US)
24th April 2026
32AQI (US)
25th April 2026
46AQI (US)
26th April 2026
48AQI (US)
27th April 2026
47AQI (US)
28th April 2026
38AQI (US)
29th April 2026
32AQI (US)
30th April 2026
38AQI (US)
1st May 2026
48AQI (US)
2nd May 2026
54AQI (US)
3rd May 2026
40AQI (US)
4th May 2026
29AQI (US)
5th May 2026
23AQI (US)
6th May 2026
30AQI (US)
7th May 2026
29AQI (US)
8th May 2026
26AQI (US)
9th May 2026
30AQI (US)
10th May 2026
30AQI (US)
11th May 2026
29AQI (US)
12th May 2026
34AQI (US)
13th May 2026
39AQI (US)
14th May 2026
30AQI (US)
15th May 2026
36AQI (US)
16th May 2026
84AQI (US)
17th May 2026
67AQI (US)
18th May 2026
54AQI (US)
19th May 2026
49AQI (US)
20th May 2026
61AQI (US)
21st May 2026
61AQI (US)
22nd May 2026
65AQI (US)
23rd May 2026
56AQI (US)
24th May 2026
60AQI (US)
25th May 2026
51AQI (US)
26th May 2026
41AQI (US)
27th May 2026
29AQI (US)
28th May 2026
26AQI (US)
29th May 2026
24AQI (US)
30th May 2026
23AQI (US)
31st May 2026
27AQI (US)
1st June 2026
27AQI (US)
2nd June 2026
31AQI (US)
3rd June 2026
27AQI (US)
4th June 2026
21AQI (US)
5th June 2026
20AQI (US)
6th June 2026
21AQI (US)
7th June 2026
21AQI (US)
8th June 2026
20AQI (US)
9th June 2026
22AQI (US)
10th June 2026
21AQI (US)
11th June 2026
23AQI (US)
12th June 2026
24AQI (US)
13th June 2026
26AQI (US)
14th June 2026
23AQI (US)
15th June 2026
22AQI (US)
16th June 2026
26AQI (US)
17th June 2026
24AQI (US)
18th June 2026
26AQI (US)
19th June 2026
28AQI (US)
20th June 2026
22AQI (US)
21st June 2026
19AQI (US)
22nd June 2026
19AQI (US)
23rd June 2026
20AQI (US)
24th June 2026
20AQI (US)
25th June 2026
27AQI (US)
26th June 2026
28AQI (US)
27th June 2026
26AQI (US)
28th June 2026
27AQI (US)
29th June 2026
26AQI (US)
30th June 2026
22AQI (US)
1st July 2026
23AQI (US)
2nd July 2026
22AQI (US)
3rd July 2026
21AQI (US)
4th July 2026
24AQI (US)
5th July 2026
22AQI (US)
6th July 2026
23AQI (US)
7th July 2026
24AQI (US)
8th July 2026
24AQI (US)
9th July 2026
24AQI (US)
10th July 2026
27AQI (US)
11th July 2026
29AQI (US)
12th July 2026
27AQI (US)
13th July 2026
27AQI (US)
14th July 2026
29AQI (US)
15th July 2026
26AQI (US)
16th July 2026
27AQI (US)
17th July 2026
28AQI (US)
18th July 2026
25AQI (US)
19th July 2026
24AQI (US)
20th July 2026
49AQI (US)
21st July 2026
59AQI (US)
22nd July 2026
52AQI (US)
23rd July 2026
29AQI (US)
24th July 2026
26AQI (US)
25th July 2026
26AQI (US)
26th July 2026
22AQI (US)
27th July 2026
17AQI (US)
28th July 2026
24AQI (US)
29th July 2026
24AQI (US)
30th July 2026
36AQI (US)
31st July 2026
38AQI (US)
1st August 2026
37AQI (US)
2nd August 2026
42AQI (US)
3rd August 2026
24AQI (US)
4th August 2026
23AQI (US)
5th August 2026
36AQI (US)
6th August 2026
35AQI (US)
7th August 2026
37AQI (US)
8th August 2026
39AQI (US)
9th August 2026
25AQI (US)
10th August 2026
24AQI (US)
11th August 2026
24AQI (US)
12th August 2026
18AQI (US)
13th August 2026
16AQI (US)
14th August 2026
13AQI (US)
15th August 2026
14AQI (US)
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

29AQI (US)

40AQI (US)

50AQI (US)

36AQI (US)

41AQI (US)

24AQI (US)

28AQI (US)

27AQI (US)

No. of days

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

202635AQI (US)

31
24
4
15
16
30
21
10
30
29
2
15
195
32

Highest AQI (US) recorded in

March

50AQI (US)

Lowest AQI (US) recorded in

June

24AQI (US)

202539AQI (US)

31
24
4
22
9
26
4
26
5
25
5
21
10
28
3
30
24
7
27
3
28
3
312
53

Highest AQI (US) recorded in

July

49AQI (US)

Lowest AQI (US) recorded in

January

30AQI (US)

202437AQI (US)

30
27
2
25
6
11
18
1
28
3
16
14
26
5
30
1
30
30
1
29
1
31
313
51
1

Highest AQI (US) recorded in

April

56AQI (US)

Lowest AQI (US) recorded in

December

27AQI (US)

202340AQI (US)

30
26
2
18
12
1
14
15
1
22
8
1
25
5
20
11
29
2
28
2
31
25
4
29
2
297
63
3

Highest AQI (US) recorded in

April

55AQI (US)

Lowest AQI (US) recorded in

December

31AQI (US)

202236AQI (US)

29
19
2
27
4
22
8
20
11
22
8
21
1
27
1
28
3
30
31
277
37

Highest AQI (US) recorded in

May

47AQI (US)

Lowest AQI (US) recorded in

December

27AQI (US)

202134AQI (US)

28
2
24
4
26
3
17
4
28
3
22
8
31
29
2
30
31
29
1
19
314
27

Highest AQI (US) recorded in

June

44AQI (US)

Lowest AQI (US) recorded in

December

25AQI (US)

202030AQI (US)

12
1
17
4
15
3
23
7
28
1
24
5
2
19
31
29
1
31
229
22
2

Highest AQI (US) recorded in

August

45AQI (US)

Lowest AQI (US) recorded in

December

21AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2023(Avg.)
40AQI (US)
Least Polluted Year Recorded
2020(Avg.)
30AQI (US)

Chuocho's annual 2026 AQI (US) (35) shows an average percentage change of -1.8% (improved AQI (US)) compared to previous years: 2020 (30), 2021 (34), 2022 (36), 2023 (40), 2024 (37), 2025 (39).