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Tunchang County Hongqi Middle School Substation, Jiaji, Hainan, China 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

Tunchang County Hongqi Middle School Substation, Jiaji, Hainan, China

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
6th Sep 2022
94AQI
Lowest AQI recorded on
8th Sep 2022
15AQI

Same Day Analysis (20th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 29 of Good air quality, showing improvement over 2022 and 2021 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 21st Sep - 22nd Sep 2025

Tunchang County Hongqi Middle School Substation, Jiaji, Hainan, China

AQI
Day
Night
.

6 AM21st Sep 2025

6 PM

5 AM22nd Sep 2025

Day time
Avg. Highest Time
12AMNaNth undefined

AQI

Avg. Lowest Time
12AMNaNth undefined

AQI

Night time
Avg. Highest Time
8PM21st Sep

51AQI

Avg. Lowest Time
11AM21st Sep

21AQI

In the last 24 hours,

Tunchang County Hongqi Middle School Substation's AQI reached its highest point of 51 at 8 PM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 21st Sep and 22nd Sep 2025.

Day & Night AQI Trend : Aug - Sep 2025

Tunchang County Hongqi Middle School Substation, Jiaji, Hainan, China

AugSep
23rd - 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 - 22nd22nd
Day
Night
23rd Aug 2025386 AMAQI
23rd Aug 2025367 AMAQI
23rd Aug 2025428 AMAQI
23rd Aug 2025389 AMAQI
23rd Aug 20253710 AMAQI
23rd Aug 20253411 AMAQI
23rd Aug 20254212 PMAQI
23rd Aug 2025361 PMAQI
23rd Aug 2025272 PMAQI
23rd Aug 2025383 PMAQI
23rd Aug 2025334 PMAQI
23rd Aug 2025315 PMAQI
23rd Aug 2025306 PMAQI
23rd Aug 2025447 PMAQI
23rd Aug 2025448 PMAQI
23rd Aug 2025499 PMAQI
23rd Aug 20254510 PMAQI
23rd Aug 20254211 PMAQI
24th Aug 20254012 AMAQI
24th Aug 2025401 AMAQI
24th Aug 2025422 AMAQI
24th Aug 2025423 AMAQI
24th Aug 2025424 AMAQI
24th Aug 2025415 AMAQI

27°C23/33°C

24th Aug 2025426 AMAQI
24th Aug 2025407 AMAQI
24th Aug 2025488 AMAQI
24th Aug 2025359 AMAQI
24th Aug 20253610 AMAQI
24th Aug 20254011 AMAQI
24th Aug 20253612 PMAQI
24th Aug 2025311 PMAQI
24th Aug 2025282 PMAQI
24th Aug 2025343 PMAQI
24th Aug 2025324 PMAQI
24th Aug 2025295 PMAQI
24th Aug 2025366 PMAQI
24th Aug 2025347 PMAQI
24th Aug 2025348 PMAQI
24th Aug 2025379 PMAQI
24th Aug 20254010 PMAQI
24th Aug 20253811 PMAQI
25th Aug 20253912 AMAQI
25th Aug 2025381 AMAQI
25th Aug 2025362 AMAQI
25th Aug 2025383 AMAQI
25th Aug 2025424 AMAQI
25th Aug 2025425 AMAQI

25°C24/27°C

25th Aug 2025406 AMAQI
25th Aug 2025407 AMAQI
25th Aug 2025288 AMAQI
25th Aug 2025309 AMAQI
25th Aug 20252210 AMAQI
25th Aug 20253411 AMAQI
25th Aug 20253312 PMAQI
25th Aug 2025351 PMAQI
25th Aug 2025292 PMAQI
25th Aug 2025293 PMAQI
25th Aug 2025304 PMAQI
25th Aug 2025285 PMAQI
25th Aug 2025306 PMAQI
25th Aug 2025307 PMAQI
25th Aug 2025388 PMAQI
25th Aug 2025419 PMAQI
25th Aug 20253910 PMAQI
25th Aug 20253811 PMAQI
26th Aug 20254112 AMAQI
26th Aug 2025381 AMAQI
26th Aug 2025412 AMAQI
26th Aug 2025383 AMAQI
26th Aug 2025384 AMAQI
26th Aug 2025385 AMAQI

25°C23/27°C

26th Aug 2025396 AMAQI
26th Aug 2025397 AMAQI
26th Aug 2025338 AMAQI
26th Aug 2025459 AMAQI
26th Aug 20253710 AMAQI
26th Aug 20253811 AMAQI
26th Aug 20254212 PMAQI
26th Aug 2025331 PMAQI
26th Aug 2025362 PMAQI
26th Aug 2025293 PMAQI
26th Aug 2025284 PMAQI
26th Aug 2025285 PMAQI
26th Aug 2025286 PMAQI
26th Aug 2025357 PMAQI
26th Aug 2025378 PMAQI
26th Aug 2025379 PMAQI
26th Aug 20253410 PMAQI
26th Aug 20253611 PMAQI
27th Aug 20253912 AMAQI
27th Aug 2025421 AMAQI
27th Aug 2025402 AMAQI
27th Aug 2025413 AMAQI
27th Aug 2025404 AMAQI
27th Aug 2025405 AMAQI

26°C24/29°C

27th Aug 2025406 AMAQI
27th Aug 2025397 AMAQI
27th Aug 2025388 AMAQI
27th Aug 2025389 AMAQI
27th Aug 20255210 AMAQI
27th Aug 20255311 AMAQI
27th Aug 20255412 PMAQI
27th Aug 2025291 PMAQI
27th Aug 2025322 PMAQI
27th Aug 2025273 PMAQI
27th Aug 2025304 PMAQI
27th Aug 2025275 PMAQI
27th Aug 2025286 PMAQI
27th Aug 2025387 PMAQI
27th Aug 2025348 PMAQI
27th Aug 2025369 PMAQI
27th Aug 20253810 PMAQI
27th Aug 20253811 PMAQI
28th Aug 20254012 AMAQI
28th Aug 2025381 AMAQI
28th Aug 2025382 AMAQI
28th Aug 2025393 AMAQI
28th Aug 2025414 AMAQI
28th Aug 2025405 AMAQI

26°C24/30°C

28th Aug 2025426 AMAQI
28th Aug 2025397 AMAQI
28th Aug 2025308 AMAQI
28th Aug 2025459 AMAQI
28th Aug 20254010 AMAQI
28th Aug 20253811 AMAQI
28th Aug 20253412 PMAQI
28th Aug 2025361 PMAQI
28th Aug 2025322 PMAQI
28th Aug 2025373 PMAQI
28th Aug 2025434 PMAQI
28th Aug 2025465 PMAQI
28th Aug 2025376 PMAQI
28th Aug 2025387 PMAQI
28th Aug 2025338 PMAQI
28th Aug 2025359 PMAQI
28th Aug 20254010 PMAQI
28th Aug 20253411 PMAQI
29th Aug 20253412 AMAQI
29th Aug 2025461 AMAQI
29th Aug 2025482 AMAQI
29th Aug 2025433 AMAQI
29th Aug 2025464 AMAQI
29th Aug 2025455 AMAQI

26°C23/31°C

29th Aug 2025476 AMAQI
29th Aug 2025467 AMAQI
29th Aug 2025488 AMAQI
29th Aug 2025289 AMAQI
29th Aug 20254510 AMAQI
29th Aug 20253011 AMAQI
29th Aug 20253612 PMAQI
29th Aug 2025321 PMAQI
29th Aug 2025352 PMAQI
29th Aug 2025303 PMAQI
29th Aug 2025324 PMAQI
29th Aug 2025325 PMAQI
29th Aug 2025406 PMAQI
29th Aug 2025467 PMAQI
29th Aug 2025458 PMAQI
29th Aug 2025379 PMAQI
29th Aug 20254110 PMAQI
29th Aug 20254311 PMAQI
30th Aug 20253612 AMAQI
30th Aug 2025461 AMAQI
30th Aug 2025452 AMAQI
30th Aug 2025433 AMAQI
30th Aug 2025444 AMAQI
30th Aug 2025425 AMAQI

25°C24/27°C

30th Aug 2025426 AMAQI
30th Aug 2025437 AMAQI
30th Aug 2025288 AMAQI
30th Aug 2025259 AMAQI
30th Aug 20252710 AMAQI
30th Aug 20253111 AMAQI
30th Aug 20252812 PMAQI
30th Aug 2025261 PMAQI
30th Aug 2025262 PMAQI
30th Aug 2025273 PMAQI
30th Aug 2025264 PMAQI
30th Aug 2025305 PMAQI
30th Aug 2025356 PMAQI
30th Aug 2025337 PMAQI
30th Aug 2025398 PMAQI
30th Aug 2025369 PMAQI
30th Aug 20253610 PMAQI
30th Aug 20253611 PMAQI
31st Aug 20253612 AMAQI
31st Aug 2025401 AMAQI
31st Aug 2025482 AMAQI
31st Aug 2025403 AMAQI
31st Aug 2025394 AMAQI
31st Aug 2025425 AMAQI

26°C25/28°C

31st Aug 2025426 AMAQI
31st Aug 2025397 AMAQI
31st Aug 2025348 AMAQI
31st Aug 2025189 AMAQI
31st Aug 20252410 AMAQI
31st Aug 20252411 AMAQI
31st Aug 20253212 PMAQI
31st Aug 2025341 PMAQI
31st Aug 2025292 PMAQI
31st Aug 2025333 PMAQI
31st Aug 2025284 PMAQI
31st Aug 2025265 PMAQI
31st Aug 2025316 PMAQI
31st Aug 2025367 PMAQI
31st Aug 2025348 PMAQI
31st Aug 2025369 PMAQI
31st Aug 20254410 PMAQI
31st Aug 20254411 PMAQI
1st Sep 20253412 AMAQI
1st Sep 2025391 AMAQI
1st Sep 2025422 AMAQI
1st Sep 2025423 AMAQI
1st Sep 2025394 AMAQI
1st Sep 2025425 AMAQI

26°C24/30°C

1st Sep 2025506 AMAQI
1st Sep 2025467 AMAQI
1st Sep 2025208 AMAQI
1st Sep 2025269 AMAQI
1st Sep 20252810 AMAQI
1st Sep 20252711 AMAQI
1st Sep 20252412 PMAQI
1st Sep 2025341 PMAQI
1st Sep 2025252 PMAQI
1st Sep 2025263 PMAQI
1st Sep 2025264 PMAQI
1st Sep 2025325 PMAQI
1st Sep 2025306 PMAQI
1st Sep 2025317 PMAQI
1st Sep 2025368 PMAQI
1st Sep 2025389 PMAQI
1st Sep 20253810 PMAQI
1st Sep 20255011 PMAQI
2nd Sep 20254112 AMAQI
2nd Sep 2025431 AMAQI
2nd Sep 2025432 AMAQI
2nd Sep 2025413 AMAQI
2nd Sep 2025404 AMAQI
2nd Sep 2025405 AMAQI

26°C24/30°C

2nd Sep 2025416 AMAQI
2nd Sep 2025457 AMAQI
2nd Sep 2025408 AMAQI
2nd Sep 2025449 AMAQI
2nd Sep 20254510 AMAQI
2nd Sep 20252911 AMAQI
2nd Sep 20252812 PMAQI
2nd Sep 2025241 PMAQI
2nd Sep 2025262 PMAQI
2nd Sep 2025253 PMAQI
2nd Sep 2025314 PMAQI
2nd Sep 2025325 PMAQI
2nd Sep 2025316 PMAQI
2nd Sep 2025327 PMAQI
2nd Sep 2025388 PMAQI
2nd Sep 2025359 PMAQI
2nd Sep 20253610 PMAQI
2nd Sep 20254111 PMAQI
3rd Sep 20253912 AMAQI
3rd Sep 2025391 AMAQI
3rd Sep 2025492 AMAQI
3rd Sep 2025473 AMAQI
3rd Sep 2025484 AMAQI
3rd Sep 2025405 AMAQI

27°C24/32°C

3rd Sep 2025446 AMAQI
3rd Sep 2025437 AMAQI
3rd Sep 2025308 AMAQI
3rd Sep 2025319 AMAQI
3rd Sep 20253410 AMAQI
3rd Sep 20253211 AMAQI
3rd Sep 20252712 PMAQI
3rd Sep 2025271 PMAQI
3rd Sep 2025282 PMAQI
3rd Sep 2025283 PMAQI
3rd Sep 2025254 PMAQI
3rd Sep 2025265 PMAQI
3rd Sep 2025286 PMAQI
3rd Sep 2025367 PMAQI
3rd Sep 2025388 PMAQI
3rd Sep 2025389 PMAQI
3rd Sep 20254210 PMAQI
3rd Sep 20254111 PMAQI
4th Sep 20253812 AMAQI
4th Sep 2025431 AMAQI
4th Sep 2025442 AMAQI
4th Sep 2025423 AMAQI
4th Sep 2025414 AMAQI
4th Sep 2025425 AMAQI

27°C24/33°C

4th Sep 2025406 AMAQI
4th Sep 2025407 AMAQI
4th Sep 2025378 AMAQI
4th Sep 2025469 AMAQI
4th Sep 20253610 AMAQI
4th Sep 20254911 AMAQI
4th Sep 20252812 PMAQI
4th Sep 2025321 PMAQI
4th Sep 2025362 PMAQI
4th Sep 2025243 PMAQI
4th Sep 2025184 PMAQI
4th Sep 2025185 PMAQI
4th Sep 2025176 PMAQI
4th Sep 2025197 PMAQI
4th Sep 2025208 PMAQI
4th Sep 2025249 PMAQI
4th Sep 20254410 PMAQI
4th Sep 20254211 PMAQI
5th Sep 20252712 AMAQI
5th Sep 2025371 AMAQI
5th Sep 2025382 AMAQI
5th Sep 2025383 AMAQI
5th Sep 2025404 AMAQI
5th Sep 2025415 AMAQI

27°C24/31°C

5th Sep 2025416 AMAQI
5th Sep 2025407 AMAQI
5th Sep 2025408 AMAQI
5th Sep 2025369 AMAQI
5th Sep 20252010 AMAQI
5th Sep 20252211 AMAQI
5th Sep 20252412 PMAQI
5th Sep 2025271 PMAQI
5th Sep 2025342 PMAQI
5th Sep 2025273 PMAQI
5th Sep 2025244 PMAQI
5th Sep 2025225 PMAQI
5th Sep 2025366 PMAQI
5th Sep 2025287 PMAQI
5th Sep 2025348 PMAQI
5th Sep 2025349 PMAQI
5th Sep 20253410 PMAQI
5th Sep 20253311 PMAQI
6th Sep 20252812 AMAQI
6th Sep 2025281 AMAQI
6th Sep 2025322 AMAQI
6th Sep 2025343 AMAQI
6th Sep 2025394 AMAQI
6th Sep 2025365 AMAQI

27°C24/31°C

6th Sep 2025376 AMAQI
6th Sep 2025347 AMAQI
6th Sep 2025248 AMAQI
6th Sep 2025309 AMAQI
6th Sep 20254010 AMAQI
6th Sep 20253011 AMAQI
6th Sep 20253412 PMAQI
6th Sep 2025311 PMAQI
6th Sep 2025242 PMAQI
6th Sep 2025253 PMAQI
6th Sep 2025274 PMAQI
6th Sep 2025335 PMAQI
6th Sep 2025266 PMAQI
6th Sep 2025347 PMAQI
6th Sep 2025318 PMAQI
6th Sep 2025389 PMAQI
6th Sep 20253410 PMAQI
6th Sep 20253811 PMAQI
7th Sep 20254212 AMAQI
7th Sep 2025361 AMAQI
7th Sep 2025352 AMAQI
7th Sep 2025413 AMAQI
7th Sep 2025384 AMAQI
7th Sep 2025375 AMAQI

27°C24/33°C

7th Sep 2025386 AMAQI
7th Sep 2025387 AMAQI
7th Sep 2025468 AMAQI
7th Sep 2025509 AMAQI
7th Sep 20254410 AMAQI
7th Sep 20254511 AMAQI
7th Sep 20254312 PMAQI
7th Sep 2025581 PMAQI
7th Sep 2025552 PMAQI
7th Sep 2025543 PMAQI
7th Sep 2025524 PMAQI
7th Sep 2025495 PMAQI
7th Sep 2025576 PMAQI
7th Sep 2025507 PMAQI
7th Sep 2025548 PMAQI
7th Sep 2025499 PMAQI
7th Sep 20254910 PMAQI
7th Sep 20254411 PMAQI
8th Sep 20254412 AMAQI
8th Sep 2025381 AMAQI
8th Sep 2025392 AMAQI
8th Sep 2025423 AMAQI
8th Sep 2025414 AMAQI
8th Sep 2025435 AMAQI

27°C24/30°C

8th Sep 2025436 AMAQI
8th Sep 2025427 AMAQI
8th Sep 2025388 AMAQI
8th Sep 2025509 AMAQI
8th Sep 20255210 AMAQI
8th Sep 20255511 AMAQI
8th Sep 20255512 PMAQI
8th Sep 2025451 PMAQI
8th Sep 2025502 PMAQI
8th Sep 2025373 PMAQI
8th Sep 2025394 PMAQI
8th Sep 2025355 PMAQI
8th Sep 2025436 PMAQI
8th Sep 2025427 PMAQI
8th Sep 2025468 PMAQI
8th Sep 2025489 PMAQI
8th Sep 20254610 PMAQI
8th Sep 20254711 PMAQI
9th Sep 20254012 AMAQI
9th Sep 2025411 AMAQI
9th Sep 2025422 AMAQI
9th Sep 2025443 AMAQI
9th Sep 2025454 AMAQI
9th Sep 2025445 AMAQI

26°C24/30°C

9th Sep 2025436 AMAQI
9th Sep 2025447 AMAQI
9th Sep 2025248 AMAQI
9th Sep 2025269 AMAQI
9th Sep 20253410 AMAQI
9th Sep 20253311 AMAQI
9th Sep 20252712 PMAQI
9th Sep 2025291 PMAQI
9th Sep 2025252 PMAQI
9th Sep 2025243 PMAQI
9th Sep 2025224 PMAQI
9th Sep 2025275 PMAQI
9th Sep 2025336 PMAQI
9th Sep 2025377 PMAQI
9th Sep 2025378 PMAQI
9th Sep 2025339 PMAQI
9th Sep 20253310 PMAQI
9th Sep 20253511 PMAQI
10th Sep 20254012 AMAQI
10th Sep 2025411 AMAQI
10th Sep 2025432 AMAQI
10th Sep 2025423 AMAQI
10th Sep 2025394 AMAQI
10th Sep 2025405 AMAQI

27°C24/33°C

10th Sep 2025386 AMAQI
10th Sep 2025397 AMAQI
10th Sep 2025248 AMAQI
10th Sep 2025249 AMAQI
10th Sep 20253410 AMAQI
10th Sep 20253111 AMAQI
10th Sep 20253712 PMAQI
10th Sep 2025341 PMAQI
10th Sep 2025332 PMAQI
10th Sep 2025263 PMAQI
10th Sep 2025314 PMAQI
10th Sep 2025315 PMAQI
10th Sep 2025276 PMAQI
10th Sep 2025347 PMAQI
10th Sep 2025398 PMAQI
10th Sep 2025389 PMAQI
10th Sep 20254010 PMAQI
10th Sep 20253811 PMAQI
11th Sep 20253912 AMAQI
11th Sep 2025401 AMAQI
11th Sep 2025402 AMAQI
11th Sep 2025383 AMAQI
11th Sep 2025384 AMAQI
11th Sep 2025375 AMAQI

26°C24/29°C

11th Sep 2025366 AMAQI
11th Sep 2025377 AMAQI
11th Sep 2025268 AMAQI
11th Sep 2025349 AMAQI
11th Sep 20253010 AMAQI
11th Sep 20253011 AMAQI
11th Sep 20252512 PMAQI
11th Sep 2025341 PMAQI
11th Sep 2025342 PMAQI
11th Sep 2025323 PMAQI
11th Sep 2025244 PMAQI
11th Sep 2025225 PMAQI
11th Sep 2025276 PMAQI
11th Sep 2025287 PMAQI
11th Sep 2025318 PMAQI
11th Sep 2025339 PMAQI
11th Sep 20253110 PMAQI
11th Sep 20253211 PMAQI
12th Sep 20253512 AMAQI
12th Sep 2025401 AMAQI
12th Sep 2025392 AMAQI
12th Sep 2025363 AMAQI
12th Sep 2025344 AMAQI
12th Sep 2025375 AMAQI

27°C23/33°C

12th Sep 2025366 AMAQI
12th Sep 2025367 AMAQI
12th Sep 2025388 AMAQI
12th Sep 2025329 AMAQI
12th Sep 20252410 AMAQI
12th Sep 20253211 AMAQI
12th Sep 20252912 PMAQI
12th Sep 2025241 PMAQI
12th Sep 2025222 PMAQI
12th Sep 2025233 PMAQI
12th Sep 2025254 PMAQI
12th Sep 2025315 PMAQI
12th Sep 2025206 PMAQI
12th Sep 2025287 PMAQI
12th Sep 2025368 PMAQI
12th Sep 2025349 PMAQI
12th Sep 20253210 PMAQI
12th Sep 20253311 PMAQI
13th Sep 20253612 AMAQI
13th Sep 2025391 AMAQI
13th Sep 2025362 AMAQI
13th Sep 2025353 AMAQI
13th Sep 2025354 AMAQI
13th Sep 2025365 AMAQI

27°C23/32°C

13th Sep 2025346 AMAQI
13th Sep 2025347 AMAQI
13th Sep 2025338 AMAQI
13th Sep 2025369 AMAQI
13th Sep 20252810 AMAQI
13th Sep 20252811 AMAQI
13th Sep 20252812 PMAQI
13th Sep 2025241 PMAQI
13th Sep 2025232 PMAQI
13th Sep 2025263 PMAQI
13th Sep 2025254 PMAQI
13th Sep 2025215 PMAQI
13th Sep 2025246 PMAQI
13th Sep 2025347 PMAQI
13th Sep 2025388 PMAQI
13th Sep 2025359 PMAQI
13th Sep 20253610 PMAQI
13th Sep 20253411 PMAQI
14th Sep 20253512 AMAQI
14th Sep 2025341 AMAQI
14th Sep 2025362 AMAQI
14th Sep 2025343 AMAQI
14th Sep 2025354 AMAQI
14th Sep 2025345 AMAQI

26°C24/30°C

14th Sep 2025346 AMAQI
14th Sep 2025367 AMAQI
14th Sep 2025308 AMAQI
14th Sep 2025279 AMAQI
14th Sep 20253010 AMAQI
14th Sep 20252911 AMAQI
14th Sep 20252812 PMAQI
14th Sep 2025241 PMAQI
14th Sep 2025222 PMAQI
14th Sep 2025273 PMAQI
14th Sep 2025264 PMAQI
14th Sep 2025235 PMAQI
14th Sep 2025196 PMAQI
14th Sep 2025257 PMAQI
14th Sep 2025368 PMAQI
14th Sep 2025339 PMAQI
14th Sep 20252910 PMAQI
14th Sep 20252911 PMAQI
15th Sep 20253112 AMAQI
15th Sep 2025351 AMAQI
15th Sep 2025362 AMAQI
15th Sep 2025333 AMAQI
15th Sep 2025324 AMAQI
15th Sep 2025345 AMAQI

27°C24/32°C

15th Sep 2025346 AMAQI
15th Sep 2025347 AMAQI
15th Sep 2025398 AMAQI
15th Sep 2025349 AMAQI
15th Sep 20253910 AMAQI
15th Sep 20253411 AMAQI
15th Sep 20252412 PMAQI
15th Sep 2025211 PMAQI
15th Sep 2025232 PMAQI
15th Sep 2025243 PMAQI
15th Sep 2025224 PMAQI
15th Sep 2025225 PMAQI
15th Sep 2025246 PMAQI
15th Sep 2025267 PMAQI
15th Sep 2025318 PMAQI
15th Sep 2025349 PMAQI
15th Sep 20253210 PMAQI
15th Sep 20253111 PMAQI
16th Sep 20253212 AMAQI
16th Sep 2025331 AMAQI
16th Sep 2025332 AMAQI
16th Sep 2025323 AMAQI
16th Sep 2025324 AMAQI
16th Sep 2025335 AMAQI

26°C23/32°C

16th Sep 2025326 AMAQI
16th Sep 2025337 AMAQI
16th Sep 2025308 AMAQI
16th Sep 2025269 AMAQI
16th Sep 20252410 AMAQI
16th Sep 20252011 AMAQI
16th Sep 20252212 PMAQI
16th Sep 2025281 PMAQI
16th Sep 2025222 PMAQI
16th Sep 2025143 PMAQI
16th Sep 2025164 PMAQI
16th Sep 2025175 PMAQI
16th Sep 2025166 PMAQI
16th Sep 2025207 PMAQI
16th Sep 2025268 PMAQI
16th Sep 2025309 PMAQI
16th Sep 20253010 PMAQI
16th Sep 20253011 PMAQI
17th Sep 20252612 AMAQI
17th Sep 2025341 AMAQI
17th Sep 2025332 AMAQI
17th Sep 2025323 AMAQI
17th Sep 2025324 AMAQI
17th Sep 2025325 AMAQI

26°C24/30°C

17th Sep 2025316 AMAQI
17th Sep 2025327 AMAQI
17th Sep 2025268 AMAQI
17th Sep 2025259 AMAQI
17th Sep 20252710 AMAQI
17th Sep 20252011 AMAQI
17th Sep 20252312 PMAQI
17th Sep 2025221 PMAQI
17th Sep 2025222 PMAQI
17th Sep 2025243 PMAQI
17th Sep 2025234 PMAQI
17th Sep 2025275 PMAQI
17th Sep 2025206 PMAQI
17th Sep 2025287 PMAQI
17th Sep 2025288 PMAQI
17th Sep 2025249 PMAQI
17th Sep 20252410 PMAQI
17th Sep 20252411 PMAQI
18th Sep 20252612 AMAQI
18th Sep 2025311 AMAQI
18th Sep 2025332 AMAQI
18th Sep 2025323 AMAQI
18th Sep 2025324 AMAQI
18th Sep 2025315 AMAQI

26°C24/30°C

18th Sep 2025306 AMAQI
18th Sep 2025327 AMAQI
18th Sep 2025248 AMAQI
18th Sep 2025319 AMAQI
18th Sep 20252710 AMAQI
18th Sep 20252011 AMAQI
18th Sep 20252212 PMAQI
18th Sep 2025201 PMAQI
18th Sep 2025182 PMAQI
18th Sep 2025213 PMAQI
18th Sep 2025324 PMAQI
18th Sep 2025245 PMAQI
18th Sep 2025306 PMAQI
18th Sep 2025307 PMAQI
18th Sep 2025268 PMAQI
18th Sep 2025279 PMAQI
18th Sep 20252610 PMAQI
18th Sep 20252511 PMAQI
19th Sep 20253212 AMAQI
19th Sep 2025331 AMAQI
19th Sep 2025322 AMAQI
19th Sep 2025323 AMAQI
19th Sep 2025314 AMAQI
19th Sep 2025315 AMAQI

26°C24/29°C

19th Sep 2025306 AMAQI
19th Sep 2025297 AMAQI
19th Sep 2025268 AMAQI
19th Sep 2025259 AMAQI
19th Sep 20252710 AMAQI
19th Sep 20252411 AMAQI
19th Sep 20252712 PMAQI
19th Sep 2025201 PMAQI
19th Sep 2025202 PMAQI
19th Sep 2025193 PMAQI
19th Sep 2025204 PMAQI
19th Sep 2025195 PMAQI
19th Sep 2025216 PMAQI
19th Sep 2025227 PMAQI
19th Sep 2025278 PMAQI
19th Sep 2025289 PMAQI
19th Sep 20252710 PMAQI
19th Sep 20253011 PMAQI
20th Sep 20252812 AMAQI
20th Sep 2025291 AMAQI
20th Sep 2025312 AMAQI
20th Sep 2025323 AMAQI
20th Sep 2025304 AMAQI
20th Sep 2025305 AMAQI

27°C24/32°C

20th Sep 2025296 AMAQI
20th Sep 2025317 AMAQI
20th Sep 2025368 AMAQI
20th Sep 2025239 AMAQI
20th Sep 20251910 AMAQI
20th Sep 20252111 AMAQI
20th Sep 20252512 PMAQI
20th Sep 2025251 PMAQI
20th Sep 2025282 PMAQI
20th Sep 2025293 PMAQI
20th Sep 2025294 PMAQI
20th Sep 2025285 PMAQI
20th Sep 2025336 PMAQI
20th Sep 2025377 PMAQI
20th Sep 2025348 PMAQI
20th Sep 2025409 PMAQI
20th Sep 20254010 PMAQI
20th Sep 20254411 PMAQI
21st Sep 20253712 AMAQI
21st Sep 2025311 AMAQI
21st Sep 2025322 AMAQI
21st Sep 2025323 AMAQI
21st Sep 2025324 AMAQI
21st Sep 2025325 AMAQI

27°C24/32°C

21st Sep 2025286 AMAQI
21st Sep 2025297 AMAQI
21st Sep 2025348 AMAQI
21st Sep 2025369 AMAQI
21st Sep 20253310 AMAQI
21st Sep 20252111 AMAQI
21st Sep 20252712 PMAQI
21st Sep 2025301 PMAQI
21st Sep 2025382 PMAQI
21st Sep 2025483 PMAQI
21st Sep 2025424 PMAQI
21st Sep 2025465 PMAQI
21st Sep 2025496 PMAQI
21st Sep 2025427 PMAQI
21st Sep 2025518 PMAQI
21st Sep 2025429 PMAQI
21st Sep 20253910 PMAQI
21st Sep 20253011 PMAQI
22nd Sep 20253412 AMAQI
22nd Sep 2025331 AMAQI

--°C/°C

6 AM
12 PM
6 PM
12 AM
5 AM

--°C/°C

Day time
Avg. Highest Time
6 AM - 7 AM

38AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
2 PM - 5 PM

29AQI

4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 7 AM (Avg. 38), while the lowest AQI was between 2 PM to 5 PM (Avg. 29).
Night time
Avg. Highest Time
1 AM - 5 AM

38AQI

5 hours / Day
150 hours / Month
Avg. Lowest Time
7 PM

33AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 AM to 5 AM (Avg. 38), while the lowest AQI was between 7 PM to 7 PM (Avg. 33).

2025 Days Vs Air Quality

Tunchang County Hongqi Middle School Substation, Jiaji, Hainan, China

2025

50%

132

45%

119

5%

12

Total number of days with different AQI categories in last 264 days in 2025 (101 days remaining)

Good
132 Days
Moderate
119 Days
Poor
12 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 50%

Health Risk Level:

Considerable

In 2025, 50% of 264 days were within WHO’s safe air quality limits, and 50% exceeded them. The risk of health issues is Considerable, with potential for conditions in sensitive individuals.

Annual Air Quality Insights

Tunchang County Hongqi Middle School Substation, Jiaji, Hainan, China

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
115AQI
2nd January 2025
102AQI
3rd January 2025
102AQI
4th January 2025
93AQI
5th January 2025
110AQI
6th January 2025
108AQI
7th January 2025
88AQI
8th January 2025
87AQI
9th January 2025
103AQI
10th January 2025
117AQI
11th January 2025
92AQI
12th January 2025
87AQI
13th January 2025
82AQI
14th January 2025
74AQI
15th January 2025
85AQI
16th January 2025
92AQI
17th January 2025
96AQI
18th January 2025
84AQI
19th January 2025
97AQI
20th January 2025
90AQI
21st January 2025
80AQI
22nd January 2025
89AQI
23rd January 2025
74AQI
24th January 2025
61AQI
25th January 2025
57AQI
26th January 2025
53AQI
27th January 2025
61AQI
28th January 2025
67AQI
29th January 2025
79AQI
30th January 2025
70AQI
31st January 2025
61AQI
1st February 2025
47AQI
2nd February 2025
49AQI
3rd February 2025
53AQI
4th February 2025
49AQI
5th February 2025
55AQI
6th February 2025
60AQI
7th February 2025
75AQI
8th February 2025
61AQI
9th February 2025
74AQI
10th February 2025
62AQI
11th February 2025
58AQI
12th February 2025
48AQI
13th February 2025
61AQI
14th February 2025
47AQI
15th February 2025
67AQI
16th February 2025
47AQI
17th February 2025
61AQI
18th February 2025
74AQI
19th February 2025
71AQI
20th February 2025
62AQI
21st February 2025
63AQI
22nd February 2025
47AQI
23rd February 2025
49AQI
24th February 2025
53AQI
25th February 2025
50AQI
26th February 2025
64AQI
27th February 2025
61AQI
28th February 2025
56AQI
1st March 2025
56AQI
2nd March 2025
54AQI
3rd March 2025
65AQI
4th March 2025
61AQI
5th March 2025
56AQI
6th March 2025
35AQI
7th March 2025
41AQI
8th March 2025
32AQI
9th March 2025
56AQI
10th March 2025
57AQI
11th March 2025
56AQI
12th March 2025
48AQI
13th March 2025
48AQI
14th March 2025
42AQI
15th March 2025
62AQI
16th March 2025
54AQI
17th March 2025
70AQI
18th March 2025
73AQI
19th March 2025
85AQI
20th March 2025
78AQI
21st March 2025
83AQI
22nd March 2025
77AQI
23rd March 2025
78AQI
24th March 2025
78AQI
25th March 2025
83AQI
26th March 2025
77AQI
27th March 2025
88AQI
28th March 2025
79AQI
29th March 2025
66AQI
30th March 2025
41AQI
31st March 2025
44AQI
1st April 2025
55AQI
2nd April 2025
65AQI
3rd April 2025
62AQI
4th April 2025
59AQI
5th April 2025
66AQI
6th April 2025
47AQI
7th April 2025
65AQI
8th April 2025
57AQI
9th April 2025
67AQI
10th April 2025
69AQI
11th April 2025
71AQI
12th April 2025
65AQI
13th April 2025
128AQI
14th April 2025
123AQI
15th April 2025
125AQI
16th April 2025
118AQI
17th April 2025
110AQI
18th April 2025
77AQI
19th April 2025
61AQI
20th April 2025
66AQI
21st April 2025
61AQI
22nd April 2025
68AQI
23rd April 2025
58AQI
24th April 2025
66AQI
25th April 2025
66AQI
26th April 2025
58AQI
27th April 2025
56AQI
28th April 2025
54AQI
29th April 2025
52AQI
30th April 2025
52AQI
1st May 2025
57AQI
2nd May 2025
56AQI
3rd May 2025
61AQI
4th May 2025
63AQI
5th May 2025
55AQI
6th May 2025
61AQI
7th May 2025
63AQI
8th May 2025
59AQI
9th May 2025
56AQI
10th May 2025
52AQI
11th May 2025
56AQI
12th May 2025
62AQI
13th May 2025
58AQI
14th May 2025
49AQI
15th May 2025
40AQI
16th May 2025
41AQI
17th May 2025
42AQI
18th May 2025
45AQI
19th May 2025
45AQI
20th May 2025
48AQI
21st May 2025
47AQI
22nd May 2025
44AQI
23rd May 2025
37AQI
24th May 2025
37AQI
25th May 2025
49AQI
26th May 2025
67AQI
27th May 2025
54AQI
28th May 2025
46AQI
29th May 2025
46AQI
30th May 2025
48AQI
31st May 2025
39AQI
1st June 2025
43AQI
2nd June 2025
39AQI
3rd June 2025
51AQI
4th June 2025
53AQI
5th June 2025
49AQI
6th June 2025
44AQI
7th June 2025
44AQI
8th June 2025
45AQI
9th June 2025
51AQI
10th June 2025
54AQI
11th June 2025
47AQI
12th June 2025
35AQI
13th June 2025
32AQI
14th June 2025
33AQI
15th June 2025
35AQI
16th June 2025
37AQI
17th June 2025
39AQI
18th June 2025
38AQI
19th June 2025
37AQI
20th June 2025
35AQI
21st June 2025
36AQI
22nd June 2025
42AQI
23rd June 2025
36AQI
24th June 2025
35AQI
25th June 2025
34AQI
26th June 2025
32AQI
27th June 2025
29AQI
28th June 2025
30AQI
29th June 2025
31AQI
30th June 2025
30AQI
1st July 2025
30AQI
2nd July 2025
27AQI
3rd July 2025
26AQI
4th July 2025
29AQI
5th July 2025
31AQI
6th July 2025
34AQI
7th July 2025
33AQI
8th July 2025
37AQI
9th July 2025
41AQI
10th July 2025
41AQI
11th July 2025
47AQI
12th July 2025
44AQI
13th July 2025
48AQI
14th July 2025
48AQI
15th July 2025
51AQI
16th July 2025
50AQI
17th July 2025
49AQI
18th July 2025
48AQI
19th July 2025
46AQI
20th July 2025
43AQI
21st July 2025
39AQI
22nd July 2025
38AQI
23rd July 2025
36AQI
24th July 2025
36AQI
25th July 2025
35AQI
26th July 2025
39AQI
27th July 2025
40AQI
28th July 2025
36AQI
29th July 2025
35AQI
30th July 2025
36AQI
31st July 2025
41AQI
1st August 2025
54AQI
2nd August 2025
53AQI
3rd August 2025
56AQI
4th August 2025
56AQI
5th August 2025
55AQI
6th August 2025
53AQI
7th August 2025
52AQI
8th August 2025
51AQI
9th August 2025
52AQI
10th August 2025
49AQI
11th August 2025
46AQI
12th August 2025
49AQI
13th August 2025
47AQI
14th August 2025
44AQI
15th August 2025
38AQI
16th August 2025
39AQI
17th August 2025
36AQI
18th August 2025
35AQI
19th August 2025
34AQI
20th August 2025
36AQI
21st August 2025
36AQI
22nd August 2025
35AQI
23rd August 2025
40AQI
24th August 2025
37AQI
25th August 2025
36AQI
26th August 2025
38AQI
27th August 2025
38AQI
28th August 2025
38AQI
29th August 2025
40AQI
30th August 2025
35AQI
31st August 2025
35AQI
1st September 2025
35AQI
2nd September 2025
37AQI
3rd September 2025
37AQI
4th September 2025
33AQI
5th September 2025
31AQI
6th September 2025
33AQI
7th September 2025
46AQI
8th September 2025
44AQI
9th September 2025
36AQI
10th September 2025
36AQI
11th September 2025
33AQI
12th September 2025
32AQI
13th September 2025
32AQI
14th September 2025
30AQI
15th September 2025
30AQI
16th September 2025
27AQI
17th September 2025
27AQI
18th September 2025
27AQI
19th September 2025
27AQI
20th September 2025
29AQI
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

86AQI

58AQI

62AQI

72AQI

51AQI

39AQI

39AQI

43AQI

33AQI

No. of days

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

202554AQI

24
7
9
19
8
23
1
24
5
16
15
26
4
30
1
22
9
20
132
119
12

Highest AQI recorded in

January

86AQI

Lowest AQI recorded in

September

33AQI

202449AQI

4
17
11
6
10
12
10
9
16
7
30
31
30
1
21
8
18
7
6
20
10
26
5
201
103
11

Highest AQI recorded in

December

83AQI

Lowest AQI recorded in

July

31AQI

202361AQI

1
8
1
1
5
8
2
1
1
1
5
1
1
9
2
3
3
30
25
57
1

Highest AQI recorded in

November

80AQI

Lowest AQI recorded in

July

19AQI

202247AQI

9
17
2
12
9
9
22
12
18
29
2
28
2
18
1
2
7
11
14
19
4
5
7
1
155
102
3

Highest AQI recorded in

September

65AQI

Lowest AQI recorded in

July

27AQI

202154AQI

20
10
1
9
19
9
21
1
13
17
26
5
17
13
30
1
28
25
5
21
10
9
19
2
3
24
4
190
154
17
1

Highest AQI recorded in

January

93AQI

Lowest AQI recorded in

August

33AQI

202056AQI

3
5
3
10
9
7
28
30
1
24
7
18
12
9
21
1
7
16
7
2
17
12
133
96
20

Highest AQI recorded in

December

92AQI

Lowest AQI recorded in

June

35AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2023(Avg.)
61AQI
Least Polluted Year Recorded
2022(Avg.)
47AQI

Tunchang County Hongqi Middle School Substation's annual 2025 AQI (54) shows an average percentage change of 3.1% (worsened AQI) compared to previous years: 2020 (56), 2021 (54), 2022 (47), 2023 (61), 2024 (49).