Hitachi, Ibaraki, 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+
September Air Quality Analysis
Hitachi, Ibaraki, Japan
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
7th Sep 2024
63AQILowest AQI recorded on
22nd Sep 2024
17AQISame Day Analysis (20th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 32 of Good air quality, showing improvement over 2024, 2023 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 20th Sep - 21st Sep 2025
Hitachi, Ibaraki, Japan
AQI
Day
Night
.
5 AM20th Sep 2025
6 PM
4 AM21st Sep 2025
Day time
Avg. Highest Time
6AM20th Sep
35AQI
Avg. Lowest Time
11AM20th Sep
18AQI
Night time
Avg. Highest Time
2AM21st Sep
34AQI
Avg. Lowest Time
8PM20th Sep
25AQI
In the last 24 hours,
Hitachi's AQI reached its highest point of 35 at 6 AM during the Day, while the lowest point, 18, was recorded at 11 AM during the Day between 20th Sep and 21st Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Hitachi, Ibaraki, Japan
AugSep
22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st
Day
Night
22nd Aug 2025475 AMAQI
22nd Aug 2025456 AMAQI
22nd Aug 2025477 AMAQI
22nd Aug 2025458 AMAQI
22nd Aug 2025549 AMAQI
22nd Aug 20255210 AMAQI
22nd Aug 20254811 AMAQI
22nd Aug 20255212 PMAQI
22nd Aug 2025531 PMAQI
22nd Aug 2025462 PMAQI
22nd Aug 2025503 PMAQI
22nd Aug 2025514 PMAQI
22nd Aug 2025445 PMAQI
22nd Aug 2025486 PMAQI
22nd Aug 2025527 PMAQI
22nd Aug 2025488 PMAQI
22nd Aug 2025419 PMAQI
22nd Aug 20253810 PMAQI
22nd Aug 20253711 PMAQI
23rd Aug 20254112 AMAQI
23rd Aug 2025421 AMAQI
23rd Aug 2025452 AMAQI
23rd Aug 2025443 AMAQI
23rd Aug 2025474 AMAQI
26°C24/28°C
23rd Aug 2025495 AMAQI
23rd Aug 2025476 AMAQI
23rd Aug 2025487 AMAQI
23rd Aug 2025488 AMAQI
23rd Aug 2025399 AMAQI
23rd Aug 20255510 AMAQI
23rd Aug 20254211 AMAQI
23rd Aug 20254712 PMAQI
23rd Aug 2025521 PMAQI
23rd Aug 2025472 PMAQI
23rd Aug 2025403 PMAQI
23rd Aug 2025494 PMAQI
23rd Aug 2025545 PMAQI
23rd Aug 2025546 PMAQI
23rd Aug 2025567 PMAQI
23rd Aug 2025508 PMAQI
23rd Aug 2025519 PMAQI
23rd Aug 20255010 PMAQI
23rd Aug 20255011 PMAQI
24th Aug 20255212 AMAQI
24th Aug 2025481 AMAQI
24th Aug 2025462 AMAQI
24th Aug 2025463 AMAQI
24th Aug 2025464 AMAQI
28°C24/31°C
24th Aug 2025465 AMAQI
24th Aug 2025466 AMAQI
24th Aug 2025477 AMAQI
24th Aug 2025468 AMAQI
24th Aug 2025529 AMAQI
24th Aug 20255610 AMAQI
24th Aug 20255411 AMAQI
24th Aug 20254912 PMAQI
24th Aug 2025591 PMAQI
24th Aug 2025572 PMAQI
24th Aug 2025603 PMAQI
24th Aug 2025634 PMAQI
24th Aug 2025625 PMAQI
24th Aug 2025626 PMAQI
24th Aug 2025597 PMAQI
24th Aug 2025558 PMAQI
24th Aug 2025449 PMAQI
24th Aug 20254510 PMAQI
24th Aug 20254611 PMAQI
25th Aug 20254112 AMAQI
25th Aug 2025441 AMAQI
25th Aug 2025442 AMAQI
25th Aug 2025463 AMAQI
25th Aug 2025504 AMAQI
28°C25/31°C
25th Aug 2025505 AMAQI
25th Aug 2025506 AMAQI
25th Aug 2025507 AMAQI
25th Aug 2025518 AMAQI
25th Aug 2025529 AMAQI
25th Aug 20255310 AMAQI
25th Aug 20255811 AMAQI
25th Aug 20255312 PMAQI
25th Aug 2025591 PMAQI
25th Aug 2025482 PMAQI
25th Aug 2025603 PMAQI
25th Aug 2025604 PMAQI
25th Aug 2025565 PMAQI
25th Aug 2025606 PMAQI
25th Aug 2025567 PMAQI
25th Aug 2025528 PMAQI
25th Aug 2025469 PMAQI
25th Aug 20253910 PMAQI
25th Aug 20253911 PMAQI
26th Aug 20253912 AMAQI
26th Aug 2025501 AMAQI
26th Aug 2025502 AMAQI
26th Aug 2025493 AMAQI
26th Aug 2025504 AMAQI
26°C24/28°C
26th Aug 2025525 AMAQI
26th Aug 2025516 AMAQI
26th Aug 2025527 AMAQI
26th Aug 2025508 AMAQI
26th Aug 2025479 AMAQI
26th Aug 20255510 AMAQI
26th Aug 20256211 AMAQI
26th Aug 20256112 PMAQI
26th Aug 2025621 PMAQI
26th Aug 2025542 PMAQI
26th Aug 2025563 PMAQI
26th Aug 2025544 PMAQI
26th Aug 2025585 PMAQI
26th Aug 2025596 PMAQI
26th Aug 2025587 PMAQI
26th Aug 2025558 PMAQI
26th Aug 2025539 PMAQI
26th Aug 20254910 PMAQI
26th Aug 20254611 PMAQI
27th Aug 20255312 AMAQI
27th Aug 2025511 AMAQI
27th Aug 2025502 AMAQI
27th Aug 2025503 AMAQI
27th Aug 2025524 AMAQI
27°C25/30°C
27th Aug 2025525 AMAQI
27th Aug 2025536 AMAQI
27th Aug 2025537 AMAQI
27th Aug 2025528 AMAQI
27th Aug 2025379 AMAQI
27th Aug 20254010 AMAQI
27th Aug 20254511 AMAQI
27th Aug 20255012 PMAQI
27th Aug 2025381 PMAQI
27th Aug 2025362 PMAQI
27th Aug 2025343 PMAQI
27th Aug 2025494 PMAQI
27th Aug 2025405 PMAQI
27th Aug 2025446 PMAQI
27th Aug 2025387 PMAQI
27th Aug 2025428 PMAQI
27th Aug 2025409 PMAQI
27th Aug 20253810 PMAQI
27th Aug 20253911 PMAQI
28th Aug 20253812 AMAQI
28th Aug 2025461 AMAQI
28th Aug 2025522 AMAQI
28th Aug 2025523 AMAQI
28th Aug 2025514 AMAQI
27°C24/31°C
28th Aug 2025525 AMAQI
28th Aug 2025526 AMAQI
28th Aug 2025527 AMAQI
28th Aug 2025528 AMAQI
28th Aug 2025319 AMAQI
28th Aug 20253710 AMAQI
28th Aug 20254511 AMAQI
28th Aug 20254012 PMAQI
28th Aug 2025441 PMAQI
28th Aug 2025342 PMAQI
28th Aug 2025393 PMAQI
28th Aug 2025374 PMAQI
28th Aug 2025365 PMAQI
28th Aug 2025466 PMAQI
28th Aug 2025367 PMAQI
28th Aug 2025408 PMAQI
28th Aug 2025369 PMAQI
28th Aug 20253810 PMAQI
28th Aug 20253411 PMAQI
29th Aug 20253312 AMAQI
29th Aug 2025431 AMAQI
29th Aug 2025502 AMAQI
29th Aug 2025513 AMAQI
29th Aug 2025484 AMAQI
25°C23/27°C
29th Aug 2025475 AMAQI
29th Aug 2025466 AMAQI
29th Aug 2025447 AMAQI
29th Aug 2025478 AMAQI
29th Aug 2025349 AMAQI
29th Aug 20254010 AMAQI
29th Aug 20253711 AMAQI
29th Aug 20253512 PMAQI
29th Aug 2025421 PMAQI
29th Aug 2025462 PMAQI
29th Aug 2025513 PMAQI
29th Aug 2025474 PMAQI
29th Aug 2025515 PMAQI
29th Aug 2025526 PMAQI
29th Aug 2025507 PMAQI
29th Aug 2025448 PMAQI
29th Aug 2025489 PMAQI
29th Aug 20254210 PMAQI
29th Aug 20254111 PMAQI
30th Aug 20253912 AMAQI
30th Aug 2025461 AMAQI
30th Aug 2025482 AMAQI
30th Aug 2025473 AMAQI
30th Aug 2025484 AMAQI
26°C23/29°C
30th Aug 2025485 AMAQI
30th Aug 2025476 AMAQI
30th Aug 2025467 AMAQI
30th Aug 2025498 AMAQI
30th Aug 2025369 AMAQI
30th Aug 20255610 AMAQI
30th Aug 20255211 AMAQI
30th Aug 20254712 PMAQI
30th Aug 2025541 PMAQI
30th Aug 2025522 PMAQI
30th Aug 2025543 PMAQI
30th Aug 2025484 PMAQI
30th Aug 2025455 PMAQI
30th Aug 2025546 PMAQI
30th Aug 2025567 PMAQI
30th Aug 2025498 PMAQI
30th Aug 2025449 PMAQI
30th Aug 20254610 PMAQI
30th Aug 20253711 PMAQI
31st Aug 20253712 AMAQI
31st Aug 2025501 AMAQI
31st Aug 2025502 AMAQI
31st Aug 2025503 AMAQI
31st Aug 2025474 AMAQI
28°C25/32°C
31st Aug 2025445 AMAQI
31st Aug 2025456 AMAQI
31st Aug 2025467 AMAQI
31st Aug 2025448 AMAQI
31st Aug 2025439 AMAQI
31st Aug 20255010 AMAQI
31st Aug 20255411 AMAQI
31st Aug 20255812 PMAQI
31st Aug 2025561 PMAQI
31st Aug 2025492 PMAQI
31st Aug 2025543 PMAQI
31st Aug 2025534 PMAQI
31st Aug 2025495 PMAQI
31st Aug 2025486 PMAQI
31st Aug 2025497 PMAQI
31st Aug 2025478 PMAQI
31st Aug 2025489 PMAQI
31st Aug 20254410 PMAQI
31st Aug 20254711 PMAQI
1st Sep 20254012 AMAQI
1st Sep 2025451 AMAQI
1st Sep 2025472 AMAQI
1st Sep 2025463 AMAQI
1st Sep 2025494 AMAQI
27°C25/29°C
1st Sep 2025485 AMAQI
1st Sep 2025496 AMAQI
1st Sep 2025477 AMAQI
1st Sep 2025498 AMAQI
1st Sep 2025419 AMAQI
1st Sep 20254010 AMAQI
1st Sep 20254411 AMAQI
1st Sep 20254212 PMAQI
1st Sep 2025451 PMAQI
1st Sep 2025352 PMAQI
1st Sep 2025473 PMAQI
1st Sep 2025384 PMAQI
1st Sep 2025395 PMAQI
1st Sep 2025306 PMAQI
1st Sep 2025357 PMAQI
1st Sep 2025398 PMAQI
1st Sep 2025389 PMAQI
1st Sep 20254110 PMAQI
1st Sep 20253911 PMAQI
2nd Sep 20254012 AMAQI
2nd Sep 2025451 AMAQI
2nd Sep 2025452 AMAQI
2nd Sep 2025473 AMAQI
2nd Sep 2025444 AMAQI
28°C25/31°C
2nd Sep 2025445 AMAQI
2nd Sep 2025466 AMAQI
2nd Sep 2025467 AMAQI
2nd Sep 2025448 AMAQI
2nd Sep 2025219 AMAQI
2nd Sep 20254210 AMAQI
2nd Sep 20253411 AMAQI
2nd Sep 20253012 PMAQI
2nd Sep 2025441 PMAQI
2nd Sep 2025222 PMAQI
2nd Sep 2025283 PMAQI
2nd Sep 2025304 PMAQI
2nd Sep 2025255 PMAQI
2nd Sep 2025326 PMAQI
2nd Sep 2025287 PMAQI
2nd Sep 2025288 PMAQI
2nd Sep 2025339 PMAQI
2nd Sep 20253610 PMAQI
2nd Sep 20253411 PMAQI
3rd Sep 20253512 AMAQI
3rd Sep 2025421 AMAQI
3rd Sep 2025462 AMAQI
3rd Sep 2025463 AMAQI
3rd Sep 2025444 AMAQI
28°C26/32°C
3rd Sep 2025425 AMAQI
3rd Sep 2025446 AMAQI
3rd Sep 2025447 AMAQI
3rd Sep 2025428 AMAQI
3rd Sep 2025229 AMAQI
3rd Sep 20253010 AMAQI
3rd Sep 20252211 AMAQI
3rd Sep 20252012 PMAQI
3rd Sep 2025321 PMAQI
3rd Sep 2025262 PMAQI
3rd Sep 2025263 PMAQI
3rd Sep 2025314 PMAQI
3rd Sep 2025275 PMAQI
3rd Sep 2025306 PMAQI
3rd Sep 2025287 PMAQI
3rd Sep 2025308 PMAQI
3rd Sep 2025329 PMAQI
3rd Sep 20253310 PMAQI
3rd Sep 20253011 PMAQI
4th Sep 20253212 AMAQI
4th Sep 2025421 AMAQI
4th Sep 2025432 AMAQI
4th Sep 2025423 AMAQI
4th Sep 2025414 AMAQI
27°C25/29°C
4th Sep 2025405 AMAQI
4th Sep 2025416 AMAQI
4th Sep 2025397 AMAQI
4th Sep 2025408 AMAQI
4th Sep 2025239 AMAQI
4th Sep 20252410 AMAQI
4th Sep 20251811 AMAQI
4th Sep 20252112 PMAQI
4th Sep 2025221 PMAQI
4th Sep 2025222 PMAQI
4th Sep 2025223 PMAQI
4th Sep 2025224 PMAQI
4th Sep 2025255 PMAQI
4th Sep 2025286 PMAQI
4th Sep 2025317 PMAQI
4th Sep 2025338 PMAQI
4th Sep 2025309 PMAQI
4th Sep 20253110 PMAQI
4th Sep 20253511 PMAQI
5th Sep 20253212 AMAQI
5th Sep 2025311 AMAQI
5th Sep 2025382 AMAQI
5th Sep 2025393 AMAQI
5th Sep 2025364 AMAQI
26°C24/27°C
5th Sep 2025365 AMAQI
5th Sep 2025366 AMAQI
5th Sep 2025357 AMAQI
5th Sep 2025358 AMAQI
5th Sep 2025209 AMAQI
5th Sep 20252010 AMAQI
5th Sep 20251711 AMAQI
5th Sep 20251812 PMAQI
5th Sep 2025181 PMAQI
5th Sep 2025182 PMAQI
5th Sep 2025223 PMAQI
5th Sep 2025224 PMAQI
5th Sep 2025205 PMAQI
5th Sep 2025266 PMAQI
5th Sep 2025287 PMAQI
5th Sep 2025328 PMAQI
5th Sep 2025289 PMAQI
5th Sep 20252210 PMAQI
5th Sep 20252511 PMAQI
6th Sep 20252612 AMAQI
6th Sep 2025251 AMAQI
6th Sep 2025302 AMAQI
6th Sep 2025283 AMAQI
6th Sep 2025284 AMAQI
24°C23/24°C
6th Sep 2025305 AMAQI
6th Sep 2025306 AMAQI
6th Sep 2025287 AMAQI
6th Sep 2025288 AMAQI
6th Sep 2025199 AMAQI
6th Sep 20252210 AMAQI
6th Sep 20252611 AMAQI
6th Sep 20252812 PMAQI
6th Sep 2025261 PMAQI
6th Sep 2025262 PMAQI
6th Sep 2025283 PMAQI
6th Sep 2025304 PMAQI
6th Sep 2025325 PMAQI
6th Sep 2025306 PMAQI
6th Sep 2025287 PMAQI
6th Sep 2025308 PMAQI
6th Sep 2025289 PMAQI
6th Sep 20252610 PMAQI
6th Sep 20252711 PMAQI
7th Sep 20252512 AMAQI
7th Sep 2025261 AMAQI
7th Sep 2025292 AMAQI
7th Sep 2025283 AMAQI
7th Sep 2025284 AMAQI
24°C22/27°C
7th Sep 2025285 AMAQI
7th Sep 2025276 AMAQI
7th Sep 2025287 AMAQI
7th Sep 2025288 AMAQI
7th Sep 2025269 AMAQI
7th Sep 20252610 AMAQI
7th Sep 20253411 AMAQI
7th Sep 20253012 PMAQI
7th Sep 2025341 PMAQI
7th Sep 2025322 PMAQI
7th Sep 2025363 PMAQI
7th Sep 2025324 PMAQI
7th Sep 2025345 PMAQI
7th Sep 2025326 PMAQI
7th Sep 2025327 PMAQI
7th Sep 2025328 PMAQI
7th Sep 2025299 PMAQI
7th Sep 20252910 PMAQI
7th Sep 20252811 PMAQI
8th Sep 20252712 AMAQI
8th Sep 2025271 AMAQI
8th Sep 2025282 AMAQI
8th Sep 2025283 AMAQI
8th Sep 2025284 AMAQI
26°C22/29°C
8th Sep 2025285 AMAQI
8th Sep 2025276 AMAQI
8th Sep 2025287 AMAQI
8th Sep 2025288 AMAQI
8th Sep 2025359 AMAQI
8th Sep 20253310 AMAQI
8th Sep 20253311 AMAQI
8th Sep 20254212 PMAQI
8th Sep 2025281 PMAQI
8th Sep 2025472 PMAQI
8th Sep 2025473 PMAQI
8th Sep 2025544 PMAQI
8th Sep 2025465 PMAQI
8th Sep 2025446 PMAQI
8th Sep 2025477 PMAQI
8th Sep 2025348 PMAQI
8th Sep 2025309 PMAQI
8th Sep 20252810 PMAQI
8th Sep 20253111 PMAQI
9th Sep 20252812 AMAQI
9th Sep 2025311 AMAQI
9th Sep 2025302 AMAQI
9th Sep 2025303 AMAQI
9th Sep 2025294 AMAQI
26°C24/29°C
9th Sep 2025315 AMAQI
9th Sep 2025326 AMAQI
9th Sep 2025307 AMAQI
9th Sep 2025308 AMAQI
9th Sep 2025409 AMAQI
9th Sep 20254010 AMAQI
9th Sep 20254411 AMAQI
9th Sep 20254612 PMAQI
9th Sep 2025421 PMAQI
9th Sep 2025422 PMAQI
9th Sep 2025373 PMAQI
9th Sep 2025514 PMAQI
9th Sep 2025425 PMAQI
9th Sep 2025466 PMAQI
9th Sep 2025527 PMAQI
9th Sep 2025448 PMAQI
9th Sep 2025349 PMAQI
9th Sep 20253210 PMAQI
9th Sep 20253411 PMAQI
10th Sep 20253412 AMAQI
10th Sep 2025311 AMAQI
10th Sep 2025312 AMAQI
10th Sep 2025313 AMAQI
10th Sep 2025324 AMAQI
25°C24/27°C
10th Sep 2025335 AMAQI
10th Sep 2025326 AMAQI
10th Sep 2025337 AMAQI
10th Sep 2025338 AMAQI
10th Sep 2025479 AMAQI
10th Sep 20254610 AMAQI
10th Sep 20254711 AMAQI
10th Sep 20254312 PMAQI
10th Sep 2025411 PMAQI
10th Sep 2025352 PMAQI
10th Sep 2025403 PMAQI
10th Sep 2025344 PMAQI
10th Sep 2025305 PMAQI
10th Sep 2025346 PMAQI
10th Sep 2025307 PMAQI
10th Sep 2025358 PMAQI
10th Sep 2025329 PMAQI
10th Sep 20253010 PMAQI
10th Sep 20253211 PMAQI
11th Sep 20252912 AMAQI
11th Sep 2025351 AMAQI
11th Sep 2025342 AMAQI
11th Sep 2025333 AMAQI
11th Sep 2025344 AMAQI
24°C23/24°C
11th Sep 2025355 AMAQI
11th Sep 2025326 AMAQI
11th Sep 2025327 AMAQI
11th Sep 2025338 AMAQI
11th Sep 2025189 AMAQI
11th Sep 20252610 AMAQI
11th Sep 20252211 AMAQI
11th Sep 20252612 PMAQI
11th Sep 2025281 PMAQI
11th Sep 2025342 PMAQI
11th Sep 2025303 PMAQI
11th Sep 2025264 PMAQI
11th Sep 2025285 PMAQI
11th Sep 2025356 PMAQI
11th Sep 2025307 PMAQI
11th Sep 2025338 PMAQI
11th Sep 2025299 PMAQI
11th Sep 20253110 PMAQI
11th Sep 20252911 PMAQI
12th Sep 20253012 AMAQI
12th Sep 2025331 AMAQI
12th Sep 2025332 AMAQI
12th Sep 2025343 AMAQI
12th Sep 2025334 AMAQI
23°C22/24°C
12th Sep 2025325 AMAQI
12th Sep 2025326 AMAQI
12th Sep 2025327 AMAQI
12th Sep 2025318 AMAQI
12th Sep 2025249 AMAQI
12th Sep 20253010 AMAQI
12th Sep 20253211 AMAQI
12th Sep 20252912 PMAQI
12th Sep 2025281 PMAQI
12th Sep 2025302 PMAQI
12th Sep 2025333 PMAQI
12th Sep 2025394 PMAQI
12th Sep 2025305 PMAQI
12th Sep 2025306 PMAQI
12th Sep 2025257 PMAQI
12th Sep 2025268 PMAQI
12th Sep 2025289 PMAQI
12th Sep 20252610 PMAQI
12th Sep 20252911 PMAQI
13th Sep 20252912 AMAQI
13th Sep 2025341 AMAQI
13th Sep 2025342 AMAQI
13th Sep 2025343 AMAQI
13th Sep 2025344 AMAQI
23°C22/24°C
13th Sep 2025365 AMAQI
13th Sep 2025336 AMAQI
13th Sep 2025347 AMAQI
13th Sep 2025348 AMAQI
13th Sep 2025229 AMAQI
13th Sep 20251510 AMAQI
13th Sep 20252411 AMAQI
13th Sep 20252512 PMAQI
13th Sep 2025241 PMAQI
13th Sep 2025212 PMAQI
13th Sep 2025213 PMAQI
13th Sep 2025204 PMAQI
13th Sep 2025215 PMAQI
13th Sep 2025186 PMAQI
13th Sep 2025207 PMAQI
13th Sep 2025248 PMAQI
13th Sep 2025299 PMAQI
13th Sep 20252810 PMAQI
13th Sep 20252811 PMAQI
14th Sep 20253012 AMAQI
14th Sep 2025371 AMAQI
14th Sep 2025352 AMAQI
14th Sep 2025363 AMAQI
14th Sep 2025344 AMAQI
24°C23/26°C
14th Sep 2025345 AMAQI
14th Sep 2025336 AMAQI
14th Sep 2025347 AMAQI
14th Sep 2025368 AMAQI
14th Sep 2025259 AMAQI
14th Sep 20252010 AMAQI
14th Sep 20252111 AMAQI
14th Sep 20252012 PMAQI
14th Sep 2025231 PMAQI
14th Sep 2025222 PMAQI
14th Sep 2025213 PMAQI
14th Sep 2025254 PMAQI
14th Sep 2025245 PMAQI
14th Sep 2025346 PMAQI
14th Sep 2025357 PMAQI
14th Sep 2025348 PMAQI
14th Sep 2025369 PMAQI
14th Sep 20253410 PMAQI
14th Sep 20253411 PMAQI
15th Sep 20253312 AMAQI
15th Sep 2025341 AMAQI
15th Sep 2025352 AMAQI
15th Sep 2025343 AMAQI
15th Sep 2025334 AMAQI
26°C24/30°C
15th Sep 2025325 AMAQI
15th Sep 2025346 AMAQI
15th Sep 2025347 AMAQI
15th Sep 2025338 AMAQI
15th Sep 2025329 AMAQI
15th Sep 20253210 AMAQI
15th Sep 20252611 AMAQI
15th Sep 20253612 PMAQI
15th Sep 2025291 PMAQI
15th Sep 2025292 PMAQI
15th Sep 2025283 PMAQI
15th Sep 2025314 PMAQI
15th Sep 2025295 PMAQI
15th Sep 2025306 PMAQI
15th Sep 2025387 PMAQI
15th Sep 2025308 PMAQI
15th Sep 2025309 PMAQI
15th Sep 20253010 PMAQI
15th Sep 20253611 PMAQI
16th Sep 20253212 AMAQI
16th Sep 2025331 AMAQI
16th Sep 2025342 AMAQI
16th Sep 2025333 AMAQI
16th Sep 2025334 AMAQI
25°C23/27°C
16th Sep 2025335 AMAQI
16th Sep 2025326 AMAQI
16th Sep 2025327 AMAQI
16th Sep 2025338 AMAQI
16th Sep 2025429 AMAQI
16th Sep 20254410 AMAQI
16th Sep 20254411 AMAQI
16th Sep 20254412 PMAQI
16th Sep 2025411 PMAQI
16th Sep 2025422 PMAQI
16th Sep 2025343 PMAQI
16th Sep 2025334 PMAQI
16th Sep 2025365 PMAQI
16th Sep 2025326 PMAQI
16th Sep 2025307 PMAQI
16th Sep 2025318 PMAQI
16th Sep 2025309 PMAQI
16th Sep 20253110 PMAQI
16th Sep 20253211 PMAQI
17th Sep 20253212 AMAQI
17th Sep 2025321 AMAQI
17th Sep 2025322 AMAQI
17th Sep 2025333 AMAQI
17th Sep 2025344 AMAQI
26°C24/29°C
17th Sep 2025345 AMAQI
17th Sep 2025346 AMAQI
17th Sep 2025347 AMAQI
17th Sep 2025348 AMAQI
17th Sep 2025489 AMAQI
17th Sep 20255410 AMAQI
17th Sep 20255811 AMAQI
17th Sep 20255912 PMAQI
17th Sep 2025571 PMAQI
17th Sep 2025562 PMAQI
17th Sep 2025523 PMAQI
17th Sep 2025444 PMAQI
17th Sep 2025525 PMAQI
17th Sep 2025396 PMAQI
17th Sep 2025497 PMAQI
17th Sep 2025388 PMAQI
17th Sep 2025469 PMAQI
17th Sep 20255010 PMAQI
17th Sep 20255211 PMAQI
18th Sep 20254712 AMAQI
18th Sep 2025321 AMAQI
18th Sep 2025332 AMAQI
18th Sep 2025343 AMAQI
18th Sep 2025364 AMAQI
27°C24/30°C
18th Sep 2025395 AMAQI
18th Sep 2025406 AMAQI
18th Sep 2025397 AMAQI
18th Sep 2025398 AMAQI
18th Sep 2025589 AMAQI
18th Sep 20256810 AMAQI
18th Sep 20256811 AMAQI
18th Sep 20256812 PMAQI
18th Sep 2025651 PMAQI
18th Sep 2025702 PMAQI
18th Sep 2025633 PMAQI
18th Sep 2025454 PMAQI
18th Sep 2025285 PMAQI
18th Sep 2025226 PMAQI
18th Sep 2025187 PMAQI
18th Sep 2025208 PMAQI
18th Sep 2025279 PMAQI
18th Sep 20252810 PMAQI
18th Sep 20252711 PMAQI
19th Sep 20252912 AMAQI
19th Sep 2025361 AMAQI
19th Sep 2025382 AMAQI
19th Sep 2025363 AMAQI
19th Sep 2025384 AMAQI
25°C22/30°C
19th Sep 2025445 AMAQI
19th Sep 2025466 AMAQI
19th Sep 2025457 AMAQI
19th Sep 2025448 AMAQI
19th Sep 2025249 AMAQI
19th Sep 20251810 AMAQI
19th Sep 20251811 AMAQI
19th Sep 20252112 PMAQI
19th Sep 2025211 PMAQI
19th Sep 2025232 PMAQI
19th Sep 2025263 PMAQI
19th Sep 2025264 PMAQI
19th Sep 2025235 PMAQI
19th Sep 2025226 PMAQI
19th Sep 2025247 PMAQI
19th Sep 2025268 PMAQI
19th Sep 2025309 PMAQI
19th Sep 20253210 PMAQI
19th Sep 20253011 PMAQI
20th Sep 20253212 AMAQI
20th Sep 2025371 AMAQI
20th Sep 2025382 AMAQI
20th Sep 2025383 AMAQI
20th Sep 2025374 AMAQI
22°C20/23°C
20th Sep 2025345 AMAQI
20th Sep 2025356 AMAQI
20th Sep 2025347 AMAQI
20th Sep 2025348 AMAQI
20th Sep 2025229 AMAQI
20th Sep 20252010 AMAQI
20th Sep 20251811 AMAQI
20th Sep 20252212 PMAQI
20th Sep 2025261 PMAQI
20th Sep 2025232 PMAQI
20th Sep 2025193 PMAQI
20th Sep 2025204 PMAQI
20th Sep 2025245 PMAQI
20th Sep 2025256 PMAQI
20th Sep 2025257 PMAQI
20th Sep 2025258 PMAQI
20th Sep 2025289 PMAQI
20th Sep 20252810 PMAQI
20th Sep 20252711 PMAQI
21st Sep 20252912 AMAQI
21st Sep 2025331 AMAQI
21st Sep 2025342 AMAQI
21st Sep 2025343 AMAQI
21st Sep 2025334 AMAQI
23°C21/24°C
21st Sep 2025325 AMAQI
5 AM21st Sep 2025326 AMAQI
21st Sep 2025317 AMAQI
21st Sep 2025318 AMAQI
21st Sep 2025199 AMAQI
21st Sep 20251810 AMAQI
21st Sep 20251611 AMAQI
11 AM21st Sep 20251612 PMAQI
21st Sep 2025161 PMAQI
6 PM
11 PM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 8 AM
40AQI
4 hours / Day
120 hours / Month
Avg. Lowest Time
9 AM
34AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 8 AM (Avg. 40), while the lowest AQI was between 9 AM to 9 AM (Avg. 34).
Night time
Avg. Highest Time
2 AM - 11 PM
37AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM
35AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 2 AM to 11 PM (Avg. 37), while the lowest AQI was between 12 AM to 12 AM (Avg. 35).
2025 Days Vs Air Quality
Hitachi, Ibaraki, Japan
2025
93%
244
7%
19
Total number of days with different AQI categories in last 264 days in 2025 (101 days remaining)
Good
244 DaysModerate
19 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 93%
Health Risk Level:
Very Low
In 2025, 93% of 264 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
Hitachi, Ibaraki, Japan
AQI levels in 2025
AQI
PM2.5
PM10
CO
SO2
NO2
O3
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
-1th undefined 2025
-1th undefined 2025
-1th undefined 2025
1st January 2025
26AQI
26AQI
2nd January 2025
27AQI
27AQI
3rd January 2025
25AQI
25AQI
4th January 2025
27AQI
27AQI
5th January 2025
26AQI
26AQI
6th January 2025
39AQI
39AQI
7th January 2025
25AQI
25AQI
8th January 2025
29AQI
29AQI
9th January 2025
25AQI
25AQI
10th January 2025
26AQI
26AQI
11th January 2025
25AQI
25AQI
12th January 2025
23AQI
23AQI
13th January 2025
26AQI
26AQI
14th January 2025
27AQI
27AQI
15th January 2025
27AQI
27AQI
16th January 2025
25AQI
25AQI
17th January 2025
26AQI
26AQI
18th January 2025
25AQI
25AQI
19th January 2025
32AQI
32AQI
20th January 2025
30AQI
30AQI
21st January 2025
36AQI
36AQI
22nd January 2025
31AQI
31AQI
23rd January 2025
33AQI
33AQI
24th January 2025
31AQI
31AQI
25th January 2025
29AQI
29AQI
26th January 2025
30AQI
30AQI
27th January 2025
28AQI
28AQI
28th January 2025
29AQI
29AQI
29th January 2025
28AQI
28AQI
30th January 2025
28AQI
28AQI
31st January 2025
28AQI
28AQI
1st February 2025
27AQI
27AQI
2nd February 2025
28AQI
28AQI
3rd February 2025
26AQI
26AQI
4th February 2025
29AQI
29AQI
5th February 2025
28AQI
28AQI
6th February 2025
27AQI
27AQI
7th February 2025
30AQI
30AQI
8th February 2025
29AQI
29AQI
9th February 2025
28AQI
28AQI
10th February 2025
28AQI
28AQI
11th February 2025
30AQI
30AQI
12th February 2025
33AQI
33AQI
13th February 2025
31AQI
31AQI
14th February 2025
30AQI
30AQI
15th February 2025
30AQI
30AQI
16th February 2025
32AQI
32AQI
17th February 2025
33AQI
33AQI
18th February 2025
30AQI
30AQI
19th February 2025
31AQI
31AQI
20th February 2025
30AQI
30AQI
21st February 2025
30AQI
30AQI
22nd February 2025
31AQI
31AQI
23rd February 2025
31AQI
31AQI
24th February 2025
32AQI
32AQI
25th February 2025
33AQI
33AQI
26th February 2025
36AQI
36AQI
27th February 2025
37AQI
37AQI
28th February 2025
43AQI
43AQI
1st March 2025
42AQI
42AQI
2nd March 2025
48AQI
48AQI
3rd March 2025
34AQI
34AQI
4th March 2025
36AQI
36AQI
5th March 2025
29AQI
29AQI
6th March 2025
30AQI
30AQI
7th March 2025
32AQI
32AQI
8th March 2025
33AQI
33AQI
9th March 2025
32AQI
32AQI
10th March 2025
36AQI
36AQI
11th March 2025
36AQI
36AQI
12th March 2025
41AQI
41AQI
13th March 2025
43AQI
43AQI
14th March 2025
36AQI
36AQI
15th March 2025
34AQI
34AQI
16th March 2025
23AQI
23AQI
17th March 2025
21AQI
21AQI
18th March 2025
24AQI
24AQI
19th March 2025
18AQI
18AQI
20th March 2025
23AQI
23AQI
21st March 2025
34AQI
34AQI
22nd March 2025
46AQI
46AQI
23rd March 2025
46AQI
46AQI
24th March 2025
40AQI
40AQI
25th March 2025
63AQI
63AQI
26th March 2025
63AQI
63AQI
27th March 2025
65AQI
65AQI
28th March 2025
47AQI
47AQI
29th March 2025
37AQI
37AQI
30th March 2025
35AQI
35AQI
31st March 2025
33AQI
33AQI
1st April 2025
25AQI
25AQI
2nd April 2025
23AQI
23AQI
3rd April 2025
21AQI
21AQI
4th April 2025
19AQI
19AQI
5th April 2025
25AQI
25AQI
6th April 2025
25AQI
25AQI
7th April 2025
30AQI
30AQI
8th April 2025
36AQI
36AQI
9th April 2025
28AQI
28AQI
10th April 2025
44AQI
44AQI
11th April 2025
46AQI
46AQI
12th April 2025
34AQI
34AQI
13th April 2025
29AQI
29AQI
14th April 2025
34AQI
34AQI
15th April 2025
28AQI
28AQI
16th April 2025
25AQI
25AQI
17th April 2025
39AQI
39AQI
18th April 2025
49AQI
49AQI
19th April 2025
59AQI
59AQI
20th April 2025
54AQI
54AQI
21st April 2025
43AQI
43AQI
22nd April 2025
48AQI
48AQI
23rd April 2025
28AQI
28AQI
24th April 2025
36AQI
36AQI
25th April 2025
36AQI
36AQI
26th April 2025
47AQI
47AQI
27th April 2025
48AQI
48AQI
28th April 2025
51AQI
51AQI
29th April 2025
34AQI
34AQI
30th April 2025
41AQI
41AQI
1st May 2025
31AQI
31AQI
2nd May 2025
31AQI
31AQI
3rd May 2025
34AQI
34AQI
4th May 2025
34AQI
34AQI
5th May 2025
35AQI
35AQI
6th May 2025
30AQI
30AQI
7th May 2025
28AQI
28AQI
8th May 2025
30AQI
30AQI
9th May 2025
31AQI
31AQI
10th May 2025
22AQI
22AQI
11th May 2025
25AQI
25AQI
12th May 2025
20AQI
20AQI
13th May 2025
35AQI
35AQI
14th May 2025
32AQI
32AQI
15th May 2025
39AQI
39AQI
16th May 2025
44AQI
44AQI
17th May 2025
28AQI
28AQI
18th May 2025
44AQI
44AQI
19th May 2025
36AQI
36AQI
20th May 2025
62AQI
62AQI
21st May 2025
55AQI
55AQI
22nd May 2025
49AQI
49AQI
23rd May 2025
45AQI
45AQI
24th May 2025
40AQI
40AQI
25th May 2025
29AQI
29AQI
26th May 2025
29AQI
29AQI
27th May 2025
27AQI
27AQI
28th May 2025
24AQI
24AQI
29th May 2025
26AQI
26AQI
30th May 2025
23AQI
23AQI
31st May 2025
18AQI
18AQI
1st June 2025
19AQI
19AQI
2nd June 2025
32AQI
32AQI
3rd June 2025
31AQI
31AQI
4th June 2025
28AQI
28AQI
5th June 2025
41AQI
41AQI
6th June 2025
46AQI
46AQI
7th June 2025
52AQI
52AQI
8th June 2025
58AQI
58AQI
9th June 2025
50AQI
50AQI
10th June 2025
42AQI
42AQI
11th June 2025
34AQI
34AQI
12th June 2025
42AQI
42AQI
13th June 2025
36AQI
36AQI
14th June 2025
35AQI
35AQI
15th June 2025
34AQI
34AQI
16th June 2025
29AQI
29AQI
17th June 2025
38AQI
38AQI
18th June 2025
39AQI
39AQI
19th June 2025
36AQI
36AQI
20th June 2025
31AQI
31AQI
21st June 2025
32AQI
32AQI
22nd June 2025
31AQI
31AQI
23rd June 2025
32AQI
32AQI
24th June 2025
31AQI
31AQI
25th June 2025
29AQI
29AQI
26th June 2025
25AQI
25AQI
27th June 2025
32AQI
32AQI
28th June 2025
33AQI
33AQI
29th June 2025
37AQI
37AQI
30th June 2025
45AQI
45AQI
1st July 2025
44AQI
44AQI
2nd July 2025
49AQI
49AQI
3rd July 2025
47AQI
47AQI
4th July 2025
42AQI
42AQI
5th July 2025
55AQI
55AQI
6th July 2025
61AQI
61AQI
7th July 2025
75AQI
75AQI
8th July 2025
73AQI
73AQI
9th July 2025
70AQI
70AQI
10th July 2025
52AQI
52AQI
11th July 2025
44AQI
44AQI
12th July 2025
45AQI
45AQI
13th July 2025
47AQI
47AQI
14th July 2025
44AQI
44AQI
15th July 2025
40AQI
40AQI
16th July 2025
40AQI
40AQI
17th July 2025
43AQI
43AQI
18th July 2025
40AQI
40AQI
19th July 2025
35AQI
35AQI
20th July 2025
39AQI
39AQI
21st July 2025
43AQI
43AQI
22nd July 2025
44AQI
44AQI
23rd July 2025
47AQI
47AQI
24th July 2025
48AQI
48AQI
25th July 2025
50AQI
50AQI
26th July 2025
48AQI
48AQI
27th July 2025
46AQI
46AQI
28th July 2025
46AQI
46AQI
29th July 2025
41AQI
41AQI
30th July 2025
40AQI
40AQI
31st July 2025
39AQI
39AQI
1st August 2025
37AQI
37AQI
2nd August 2025
40AQI
40AQI
3rd August 2025
42AQI
42AQI
4th August 2025
53AQI
53AQI
5th August 2025
46AQI
46AQI
6th August 2025
42AQI
42AQI
7th August 2025
36AQI
36AQI
8th August 2025
37AQI
37AQI
9th August 2025
34AQI
34AQI
10th August 2025
33AQI
33AQI
11th August 2025
33AQI
33AQI
12th August 2025
30AQI
30AQI
13th August 2025
30AQI
30AQI
14th August 2025
31AQI
31AQI
15th August 2025
30AQI
30AQI
16th August 2025
33AQI
33AQI
17th August 2025
38AQI
38AQI
18th August 2025
40AQI
40AQI
19th August 2025
41AQI
41AQI
20th August 2025
47AQI
47AQI
21st August 2025
45AQI
45AQI
22nd August 2025
46AQI
46AQI
23rd August 2025
48AQI
48AQI
24th August 2025
51AQI
51AQI
25th August 2025
50AQI
50AQI
26th August 2025
53AQI
53AQI
27th August 2025
45AQI
45AQI
28th August 2025
43AQI
43AQI
29th August 2025
45AQI
45AQI
30th August 2025
48AQI
48AQI
31st August 2025
48AQI
48AQI
1st September 2025
42AQI
42AQI
2nd September 2025
36AQI
36AQI
3rd September 2025
34AQI
34AQI
4th September 2025
32AQI
32AQI
5th September 2025
30AQI
30AQI
6th September 2025
28AQI
28AQI
7th September 2025
30AQI
30AQI
8th September 2025
34AQI
34AQI
9th September 2025
37AQI
37AQI
10th September 2025
35AQI
35AQI
11th September 2025
30AQI
30AQI
12th September 2025
30AQI
30AQI
13th September 2025
27AQI
27AQI
14th September 2025
31AQI
31AQI
15th September 2025
32AQI
32AQI
16th September 2025
35AQI
35AQI
17th September 2025
44AQI
44AQI
18th September 2025
40AQI
40AQI
19th September 2025
30AQI
30AQI
20th September 2025
32AQI
32AQI
21st September 2025
22nd September 2025
23rd September 2025
24th September 2025
25th September 2025
26th September 2025
27th September 2025
28th September 2025
29th September 2025
30th September 2025
1st October 2025
2nd October 2025
3rd October 2025
4th October 2025
5th October 2025
6th October 2025
7th October 2025
8th October 2025
9th October 2025
10th October 2025
11th October 2025
12th October 2025
13th October 2025
14th October 2025
15th October 2025
16th October 2025
17th October 2025
18th October 2025
19th October 2025
20th October 2025
21st October 2025
22nd October 2025
23rd October 2025
24th October 2025
25th October 2025
26th October 2025
27th October 2025
28th October 2025
29th October 2025
30th October 2025
31st October 2025
1st November 2025
2nd November 2025
3rd November 2025
4th November 2025
5th November 2025
6th November 2025
7th November 2025
8th November 2025
9th November 2025
10th November 2025
11th November 2025
12th November 2025
13th November 2025
14th November 2025
15th November 2025
16th November 2025
17th November 2025
18th November 2025
19th November 2025
20th November 2025
21st November 2025
22nd November 2025
23rd November 2025
24th November 2025
25th November 2025
26th November 2025
27th November 2025
28th November 2025
29th November 2025
30th November 2025
1st December 2025
2nd December 2025
3rd December 2025
4th December 2025
5th December 2025
6th December 2025
7th December 2025
8th December 2025
9th December 2025
10th December 2025
11th December 2025
12th December 2025
13th December 2025
14th December 2025
15th December 2025
16th December 2025
17th December 2025
18th December 2025
19th December 2025
20th December 2025
21st December 2025
22nd December 2025
23rd December 2025
24th December 2025
25th December 2025
26th December 2025
27th December 2025
28th December 2025
29th December 2025
30th December 2025
31st December 2025
28AQI
31AQI
37AQI
36AQI
33AQI
36AQI
48AQI
41AQI
33AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202536AQI
31
28
28
3
27
3
29
2
28
2
25
6
28
3
20
244
19
Highest AQI recorded in
July48AQI
Lowest AQI recorded in
January28AQI
202432AQI
31
29
27
4
25
4
1
30
1
28
2
20
11
31
28
2
31
30
31
341
24
1
Highest AQI recorded in
July42AQI
Lowest AQI recorded in
December25AQI
202333AQI
31
27
1
27
4
26
4
30
1
28
2
29
2
29
2
30
31
27
2
31
346
18
Highest AQI recorded in
April42AQI
Lowest AQI recorded in
December27AQI
202232AQI
30
21
29
2
26
4
30
1
26
4
17
4
1
28
31
30
31
300
15
Highest AQI recorded in
April39AQI
Lowest AQI recorded in
December23AQI
202130AQI
29
2
12
19
2
28
2
30
1
26
4
31
31
30
31
30
31
328
11
Highest AQI recorded in
March40AQI
Lowest AQI recorded in
July26AQI
202032AQI
11
1
21
16
2
26
4
31
25
6
19
30
1
28
2
15
222
16
Highest AQI recorded in
August39AQI
Lowest AQI recorded in
December24AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2025(Avg.)
36AQILeast Polluted Year Recorded
2021(Avg.)
30AQIHitachi's annual 2025 AQI (36) shows an average percentage change of 14.1% (worsened AQI) compared to previous years: 2020 (32), 2021 (30), 2022 (32), 2023 (33), 2024 (32).
