Institute Of Forestry Sub Station, Chongshan, 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
Institute Of Forestry Sub Station, Chongshan, Hainan, China
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
6th Sep 2022
80AQILowest AQI recorded on
8th Sep 2022
12AQISame Day Analysis (23rd September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 23 of Good air quality, showing improvement over 2024 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 23rd Sep - 24th Sep 2025
Institute Of Forestry Sub Station, Chongshan, Hainan, China
AQI
Day
Night
.
6 AM23rd Sep 2025
6 PM
5 AM24th Sep 2025
Day time
Avg. Highest Time
7AM23rd Sep
31AQI
Avg. Lowest Time
6PM23rd Sep
14AQI
Night time
Avg. Highest Time
1AM24th Sep
30AQI
Avg. Lowest Time
7PM23rd Sep
19AQI
In the last 24 hours,
Institute Of Forestry Sub Station's AQI reached its highest point of 31 at 7 AM during the Day, while the lowest point, 14, was recorded at 6 PM during the Day between 23rd Sep and 24th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Institute Of Forestry Sub Station, Chongshan, Hainan, China
AugSep
25th - 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 - 23rd23rd - 24th24th
Day
Night
25th Aug 2025416 AMAQI
25th Aug 2025417 AMAQI
25th Aug 2025348 AMAQI
25th Aug 2025359 AMAQI
25th Aug 20252810 AMAQI
25th Aug 20253211 AMAQI
25th Aug 20253412 PMAQI
25th Aug 2025341 PMAQI
25th Aug 2025302 PMAQI
25th Aug 2025253 PMAQI
25th Aug 2025284 PMAQI
25th Aug 2025305 PMAQI
25th Aug 2025296 PMAQI
25th Aug 2025327 PMAQI
25th Aug 2025398 PMAQI
25th Aug 2025389 PMAQI
25th Aug 20255010 PMAQI
25th Aug 20254211 PMAQI
26th Aug 20254212 AMAQI
26th Aug 2025371 AMAQI
26th Aug 2025412 AMAQI
26th Aug 2025413 AMAQI
26th Aug 2025394 AMAQI
26th Aug 2025415 AMAQI
21°C19/23°C
26th Aug 2025416 AMAQI
26th Aug 2025397 AMAQI
26th Aug 2025368 AMAQI
26th Aug 2025469 AMAQI
26th Aug 20253610 AMAQI
26th Aug 20254011 AMAQI
26th Aug 20253412 PMAQI
26th Aug 2025301 PMAQI
26th Aug 2025312 PMAQI
26th Aug 2025323 PMAQI
26th Aug 2025244 PMAQI
26th Aug 2025275 PMAQI
26th Aug 2025316 PMAQI
26th Aug 2025327 PMAQI
26th Aug 2025358 PMAQI
26th Aug 2025389 PMAQI
26th Aug 20253610 PMAQI
26th Aug 20253911 PMAQI
27th Aug 20254112 AMAQI
27th Aug 2025371 AMAQI
27th Aug 2025422 AMAQI
27th Aug 2025413 AMAQI
27th Aug 2025414 AMAQI
27th Aug 2025415 AMAQI
23°C20/26°C
27th Aug 2025406 AMAQI
27th Aug 2025397 AMAQI
27th Aug 2025308 AMAQI
27th Aug 2025309 AMAQI
27th Aug 20255110 AMAQI
27th Aug 20254611 AMAQI
27th Aug 20255212 PMAQI
27th Aug 2025341 PMAQI
27th Aug 2025262 PMAQI
27th Aug 2025243 PMAQI
27th Aug 2025254 PMAQI
27th Aug 2025215 PMAQI
27th Aug 2025226 PMAQI
27th Aug 2025307 PMAQI
27th Aug 2025348 PMAQI
27th Aug 2025349 PMAQI
27th Aug 20253410 PMAQI
27th Aug 20253611 PMAQI
28th Aug 20253112 AMAQI
28th Aug 2025381 AMAQI
28th Aug 2025382 AMAQI
28th Aug 2025403 AMAQI
28th Aug 2025404 AMAQI
28th Aug 2025385 AMAQI
23°C21/27°C
28th Aug 2025416 AMAQI
28th Aug 2025387 AMAQI
28th Aug 2025408 AMAQI
28th Aug 2025439 AMAQI
28th Aug 20253810 AMAQI
28th Aug 20253611 AMAQI
28th Aug 20253212 PMAQI
28th Aug 2025281 PMAQI
28th Aug 2025342 PMAQI
28th Aug 2025443 PMAQI
28th Aug 2025424 PMAQI
28th Aug 2025505 PMAQI
28th Aug 2025426 PMAQI
28th Aug 2025337 PMAQI
28th Aug 2025348 PMAQI
28th Aug 2025359 PMAQI
28th Aug 20254310 PMAQI
28th Aug 20253811 PMAQI
29th Aug 20253612 AMAQI
29th Aug 2025461 AMAQI
29th Aug 2025472 AMAQI
29th Aug 2025433 AMAQI
29th Aug 2025464 AMAQI
29th Aug 2025455 AMAQI
25°C22/30°C
29th Aug 2025466 AMAQI
29th Aug 2025467 AMAQI
29th Aug 2025498 AMAQI
29th Aug 2025309 AMAQI
29th Aug 20253610 AMAQI
29th Aug 20253011 AMAQI
29th Aug 20253912 PMAQI
29th Aug 2025371 PMAQI
29th Aug 2025372 PMAQI
29th Aug 2025363 PMAQI
29th Aug 2025374 PMAQI
29th Aug 2025395 PMAQI
29th Aug 2025366 PMAQI
29th Aug 2025437 PMAQI
29th Aug 2025478 PMAQI
29th Aug 2025479 PMAQI
29th Aug 20254610 PMAQI
29th Aug 20254311 PMAQI
30th Aug 20253912 AMAQI
30th Aug 2025471 AMAQI
30th Aug 2025462 AMAQI
30th Aug 2025443 AMAQI
30th Aug 2025484 AMAQI
30th Aug 2025445 AMAQI
23°C21/26°C
30th Aug 2025436 AMAQI
30th Aug 2025447 AMAQI
30th Aug 2025428 AMAQI
30th Aug 2025329 AMAQI
30th Aug 20253410 AMAQI
30th Aug 20252611 AMAQI
30th Aug 20253412 PMAQI
30th Aug 2025381 PMAQI
30th Aug 2025262 PMAQI
30th Aug 2025283 PMAQI
30th Aug 2025274 PMAQI
30th Aug 2025335 PMAQI
30th Aug 2025346 PMAQI
30th Aug 2025417 PMAQI
30th Aug 2025398 PMAQI
30th Aug 2025399 PMAQI
30th Aug 20253310 PMAQI
30th Aug 20253811 PMAQI
31st Aug 20254112 AMAQI
31st Aug 2025411 AMAQI
31st Aug 2025492 AMAQI
31st Aug 2025433 AMAQI
31st Aug 2025424 AMAQI
31st Aug 2025445 AMAQI
22°C19/24°C
31st Aug 2025416 AMAQI
31st Aug 2025427 AMAQI
31st Aug 2025368 AMAQI
31st Aug 2025329 AMAQI
31st Aug 20254510 AMAQI
31st Aug 20254811 AMAQI
31st Aug 20253812 PMAQI
31st Aug 2025351 PMAQI
31st Aug 2025332 PMAQI
31st Aug 2025363 PMAQI
31st Aug 2025284 PMAQI
31st Aug 2025345 PMAQI
31st Aug 2025226 PMAQI
31st Aug 2025327 PMAQI
31st Aug 2025358 PMAQI
31st Aug 2025389 PMAQI
31st Aug 20255010 PMAQI
31st Aug 20254711 PMAQI
1st Sep 20253112 AMAQI
1st Sep 2025401 AMAQI
1st Sep 2025462 AMAQI
1st Sep 2025433 AMAQI
1st Sep 2025404 AMAQI
1st Sep 2025435 AMAQI
23°C20/27°C
1st Sep 2025506 AMAQI
1st Sep 2025457 AMAQI
1st Sep 2025408 AMAQI
1st Sep 2025269 AMAQI
1st Sep 20252310 AMAQI
1st Sep 20252811 AMAQI
1st Sep 20253412 PMAQI
1st Sep 2025381 PMAQI
1st Sep 2025322 PMAQI
1st Sep 2025363 PMAQI
1st Sep 2025294 PMAQI
1st Sep 2025285 PMAQI
1st Sep 2025306 PMAQI
1st Sep 2025327 PMAQI
1st Sep 2025368 PMAQI
1st Sep 2025409 PMAQI
1st Sep 20254410 PMAQI
1st Sep 20254911 PMAQI
2nd Sep 20254312 AMAQI
2nd Sep 2025411 AMAQI
2nd Sep 2025432 AMAQI
2nd Sep 2025413 AMAQI
2nd Sep 2025404 AMAQI
2nd Sep 2025405 AMAQI
23°C20/27°C
2nd Sep 2025436 AMAQI
2nd Sep 2025467 AMAQI
2nd Sep 2025408 AMAQI
2nd Sep 2025349 AMAQI
2nd Sep 20253210 AMAQI
2nd Sep 20254011 AMAQI
2nd Sep 20253512 PMAQI
2nd Sep 2025381 PMAQI
2nd Sep 2025422 PMAQI
2nd Sep 2025323 PMAQI
2nd Sep 2025404 PMAQI
2nd Sep 2025395 PMAQI
2nd Sep 2025476 PMAQI
2nd Sep 2025447 PMAQI
2nd Sep 2025448 PMAQI
2nd Sep 2025419 PMAQI
2nd Sep 20254410 PMAQI
2nd Sep 20254411 PMAQI
3rd Sep 20254412 AMAQI
3rd Sep 2025421 AMAQI
3rd Sep 2025482 AMAQI
3rd Sep 2025483 AMAQI
3rd Sep 2025504 AMAQI
3rd Sep 2025445 AMAQI
24°C21/29°C
3rd Sep 2025486 AMAQI
3rd Sep 2025437 AMAQI
3rd Sep 2025318 AMAQI
3rd Sep 2025329 AMAQI
3rd Sep 20253110 AMAQI
3rd Sep 20254511 AMAQI
3rd Sep 20253612 PMAQI
3rd Sep 2025281 PMAQI
3rd Sep 2025302 PMAQI
3rd Sep 2025213 PMAQI
3rd Sep 2025234 PMAQI
3rd Sep 2025275 PMAQI
3rd Sep 2025326 PMAQI
3rd Sep 2025397 PMAQI
3rd Sep 2025378 PMAQI
3rd Sep 2025389 PMAQI
3rd Sep 20254610 PMAQI
3rd Sep 20253911 PMAQI
4th Sep 20254512 AMAQI
4th Sep 2025421 AMAQI
4th Sep 2025422 AMAQI
4th Sep 2025413 AMAQI
4th Sep 2025414 AMAQI
4th Sep 2025415 AMAQI
24°C21/28°C
4th Sep 2025406 AMAQI
4th Sep 2025397 AMAQI
4th Sep 2025398 AMAQI
4th Sep 2025449 AMAQI
4th Sep 20254310 AMAQI
4th Sep 20255411 AMAQI
4th Sep 20252612 PMAQI
4th Sep 2025411 PMAQI
4th Sep 2025262 PMAQI
4th Sep 2025483 PMAQI
4th Sep 2025144 PMAQI
4th Sep 2025165 PMAQI
4th Sep 2025556 PMAQI
4th Sep 2025447 PMAQI
4th Sep 2025138 PMAQI
4th Sep 2025229 PMAQI
4th Sep 20251710 PMAQI
4th Sep 20251611 PMAQI
5th Sep 20251812 AMAQI
5th Sep 2025361 AMAQI
5th Sep 2025372 AMAQI
5th Sep 2025363 AMAQI
5th Sep 2025384 AMAQI
5th Sep 2025405 AMAQI
24°C21/29°C
5th Sep 2025406 AMAQI
5th Sep 2025377 AMAQI
5th Sep 2025398 AMAQI
5th Sep 2025399 AMAQI
5th Sep 20252710 AMAQI
5th Sep 20253411 AMAQI
5th Sep 20253312 PMAQI
5th Sep 2025441 PMAQI
5th Sep 2025452 PMAQI
5th Sep 2025413 PMAQI
5th Sep 2025294 PMAQI
5th Sep 2025285 PMAQI
5th Sep 2025326 PMAQI
5th Sep 2025327 PMAQI
5th Sep 2025318 PMAQI
5th Sep 2025349 PMAQI
5th Sep 20253610 PMAQI
5th Sep 20254211 PMAQI
6th Sep 20253012 AMAQI
6th Sep 2025331 AMAQI
6th Sep 2025352 AMAQI
6th Sep 2025383 AMAQI
6th Sep 2025434 AMAQI
6th Sep 2025395 AMAQI
24°C20/27°C
6th Sep 2025406 AMAQI
6th Sep 2025357 AMAQI
6th Sep 2025218 AMAQI
6th Sep 2025279 AMAQI
6th Sep 20253610 AMAQI
6th Sep 20252711 AMAQI
6th Sep 20253012 PMAQI
6th Sep 2025221 PMAQI
6th Sep 2025232 PMAQI
6th Sep 2025283 PMAQI
6th Sep 2025264 PMAQI
6th Sep 2025345 PMAQI
6th Sep 2025266 PMAQI
6th Sep 2025267 PMAQI
6th Sep 2025348 PMAQI
6th Sep 2025449 PMAQI
6th Sep 20253210 PMAQI
6th Sep 20253711 PMAQI
7th Sep 20254112 AMAQI
7th Sep 2025371 AMAQI
7th Sep 2025372 AMAQI
7th Sep 2025463 AMAQI
7th Sep 2025404 AMAQI
7th Sep 2025405 AMAQI
24°C20/28°C
7th Sep 2025446 AMAQI
7th Sep 2025417 AMAQI
7th Sep 2025398 AMAQI
7th Sep 2025309 AMAQI
7th Sep 20253810 AMAQI
7th Sep 20254411 AMAQI
7th Sep 20254212 PMAQI
7th Sep 2025551 PMAQI
7th Sep 2025542 PMAQI
7th Sep 2025523 PMAQI
7th Sep 2025484 PMAQI
7th Sep 2025495 PMAQI
7th Sep 2025576 PMAQI
7th Sep 2025507 PMAQI
7th Sep 2025538 PMAQI
7th Sep 2025519 PMAQI
7th Sep 20255210 PMAQI
7th Sep 20254811 PMAQI
8th Sep 20254312 AMAQI
8th Sep 2025381 AMAQI
8th Sep 2025402 AMAQI
8th Sep 2025413 AMAQI
8th Sep 2025434 AMAQI
8th Sep 2025415 AMAQI
23°C20/28°C
8th Sep 2025436 AMAQI
8th Sep 2025387 AMAQI
8th Sep 2025348 AMAQI
8th Sep 2025459 AMAQI
8th Sep 20253810 AMAQI
8th Sep 20255111 AMAQI
8th Sep 20254612 PMAQI
8th Sep 2025451 PMAQI
8th Sep 2025482 PMAQI
8th Sep 2025303 PMAQI
8th Sep 2025324 PMAQI
8th Sep 2025365 PMAQI
8th Sep 2025386 PMAQI
8th Sep 2025427 PMAQI
8th Sep 2025448 PMAQI
8th Sep 2025499 PMAQI
8th Sep 20254610 PMAQI
8th Sep 20254411 PMAQI
9th Sep 20253412 AMAQI
9th Sep 2025431 AMAQI
9th Sep 2025402 AMAQI
9th Sep 2025463 AMAQI
9th Sep 2025484 AMAQI
9th Sep 2025445 AMAQI
24°C21/28°C
9th Sep 2025456 AMAQI
9th Sep 2025427 AMAQI
9th Sep 2025288 AMAQI
9th Sep 2025289 AMAQI
9th Sep 20253410 AMAQI
9th Sep 20253211 AMAQI
9th Sep 20252712 PMAQI
9th Sep 2025321 PMAQI
9th Sep 2025262 PMAQI
9th Sep 2025263 PMAQI
9th Sep 2025264 PMAQI
9th Sep 2025375 PMAQI
9th Sep 2025356 PMAQI
9th Sep 2025377 PMAQI
9th Sep 2025388 PMAQI
9th Sep 2025369 PMAQI
9th Sep 20253210 PMAQI
9th Sep 20254011 PMAQI
10th Sep 20254212 AMAQI
10th Sep 2025411 AMAQI
10th Sep 2025422 AMAQI
10th Sep 2025413 AMAQI
10th Sep 2025404 AMAQI
10th Sep 2025425 AMAQI
23°C21/27°C
10th Sep 2025416 AMAQI
10th Sep 2025387 AMAQI
10th Sep 2025248 AMAQI
10th Sep 2025269 AMAQI
10th Sep 20252710 AMAQI
10th Sep 20253011 AMAQI
10th Sep 20252812 PMAQI
10th Sep 2025241 PMAQI
10th Sep 2025272 PMAQI
10th Sep 2025283 PMAQI
10th Sep 2025314 PMAQI
10th Sep 2025285 PMAQI
10th Sep 2025316 PMAQI
10th Sep 2025387 PMAQI
10th Sep 2025428 PMAQI
10th Sep 2025409 PMAQI
10th Sep 20253610 PMAQI
10th Sep 20254011 PMAQI
11th Sep 20253912 AMAQI
11th Sep 2025371 AMAQI
11th Sep 2025422 AMAQI
11th Sep 2025363 AMAQI
11th Sep 2025384 AMAQI
11th Sep 2025355 AMAQI
23°C20/26°C
11th Sep 2025366 AMAQI
11th Sep 2025367 AMAQI
11th Sep 2025328 AMAQI
11th Sep 2025369 AMAQI
11th Sep 20253010 AMAQI
11th Sep 20252611 AMAQI
11th Sep 20253012 PMAQI
11th Sep 2025291 PMAQI
11th Sep 2025262 PMAQI
11th Sep 2025303 PMAQI
11th Sep 2025324 PMAQI
11th Sep 2025365 PMAQI
11th Sep 2025266 PMAQI
11th Sep 2025357 PMAQI
11th Sep 2025308 PMAQI
11th Sep 2025369 PMAQI
11th Sep 20253010 PMAQI
11th Sep 20252811 PMAQI
12th Sep 20253512 AMAQI
12th Sep 2025381 AMAQI
12th Sep 2025382 AMAQI
12th Sep 2025373 AMAQI
12th Sep 2025344 AMAQI
12th Sep 2025365 AMAQI
24°C20/29°C
12th Sep 2025356 AMAQI
12th Sep 2025347 AMAQI
12th Sep 2025268 AMAQI
12th Sep 2025289 AMAQI
12th Sep 20252610 AMAQI
12th Sep 20253011 AMAQI
12th Sep 20252512 PMAQI
12th Sep 2025251 PMAQI
12th Sep 2025222 PMAQI
12th Sep 2025373 PMAQI
12th Sep 2025344 PMAQI
12th Sep 2025355 PMAQI
12th Sep 2025326 PMAQI
12th Sep 2025357 PMAQI
12th Sep 2025348 PMAQI
12th Sep 2025349 PMAQI
12th Sep 20253410 PMAQI
12th Sep 20253511 PMAQI
13th Sep 20253712 AMAQI
13th Sep 2025381 AMAQI
13th Sep 2025352 AMAQI
13th Sep 2025343 AMAQI
13th Sep 2025354 AMAQI
13th Sep 2025345 AMAQI
24°C20/30°C
13th Sep 2025346 AMAQI
13th Sep 2025347 AMAQI
13th Sep 2025358 AMAQI
13th Sep 2025349 AMAQI
13th Sep 20252610 AMAQI
13th Sep 20252411 AMAQI
13th Sep 20252612 PMAQI
13th Sep 2025231 PMAQI
13th Sep 2025252 PMAQI
13th Sep 2025243 PMAQI
13th Sep 2025224 PMAQI
13th Sep 2025225 PMAQI
13th Sep 2025276 PMAQI
13th Sep 2025327 PMAQI
13th Sep 2025378 PMAQI
13th Sep 2025359 PMAQI
13th Sep 20253210 PMAQI
13th Sep 20253211 PMAQI
14th Sep 20253412 AMAQI
14th Sep 2025341 AMAQI
14th Sep 2025352 AMAQI
14th Sep 2025343 AMAQI
14th Sep 2025344 AMAQI
14th Sep 2025345 AMAQI
23°C20/28°C
14th Sep 2025346 AMAQI
14th Sep 2025357 AMAQI
14th Sep 2025288 AMAQI
14th Sep 2025279 AMAQI
14th Sep 20252610 AMAQI
14th Sep 20253711 AMAQI
14th Sep 20252512 PMAQI
14th Sep 2025281 PMAQI
14th Sep 2025262 PMAQI
14th Sep 2025233 PMAQI
14th Sep 2025214 PMAQI
14th Sep 2025225 PMAQI
14th Sep 2025206 PMAQI
14th Sep 2025287 PMAQI
14th Sep 2025368 PMAQI
14th Sep 2025349 PMAQI
14th Sep 20252710 PMAQI
14th Sep 20252611 PMAQI
15th Sep 20252912 AMAQI
15th Sep 2025341 AMAQI
15th Sep 2025342 AMAQI
15th Sep 2025333 AMAQI
15th Sep 2025344 AMAQI
15th Sep 2025345 AMAQI
23°C20/26°C
15th Sep 2025346 AMAQI
15th Sep 2025337 AMAQI
15th Sep 2025338 AMAQI
15th Sep 2025339 AMAQI
15th Sep 20253910 AMAQI
15th Sep 20252911 AMAQI
15th Sep 20252012 PMAQI
15th Sep 2025161 PMAQI
15th Sep 2025142 PMAQI
15th Sep 2025173 PMAQI
15th Sep 2025184 PMAQI
15th Sep 2025145 PMAQI
15th Sep 2025156 PMAQI
15th Sep 2025207 PMAQI
15th Sep 2025278 PMAQI
15th Sep 2025329 PMAQI
15th Sep 20253010 PMAQI
15th Sep 20253411 PMAQI
16th Sep 20252812 AMAQI
16th Sep 2025331 AMAQI
16th Sep 2025342 AMAQI
16th Sep 2025323 AMAQI
16th Sep 2025324 AMAQI
16th Sep 2025335 AMAQI
24°C21/30°C
16th Sep 2025336 AMAQI
16th Sep 2025327 AMAQI
16th Sep 2025248 AMAQI
16th Sep 2025189 AMAQI
16th Sep 20252210 AMAQI
16th Sep 20252011 AMAQI
16th Sep 20251812 PMAQI
16th Sep 2025181 PMAQI
16th Sep 2025162 PMAQI
16th Sep 2025183 PMAQI
16th Sep 2025184 PMAQI
16th Sep 2025185 PMAQI
16th Sep 2025186 PMAQI
16th Sep 2025227 PMAQI
16th Sep 2025238 PMAQI
16th Sep 2025269 PMAQI
16th Sep 20253410 PMAQI
16th Sep 20252411 PMAQI
17th Sep 20252612 AMAQI
17th Sep 2025341 AMAQI
17th Sep 2025332 AMAQI
17th Sep 2025313 AMAQI
17th Sep 2025304 AMAQI
17th Sep 2025305 AMAQI
22°C19/27°C
17th Sep 2025306 AMAQI
17th Sep 2025307 AMAQI
17th Sep 2025208 AMAQI
17th Sep 2025249 AMAQI
17th Sep 20253910 AMAQI
17th Sep 20254011 AMAQI
17th Sep 20252312 PMAQI
17th Sep 2025311 PMAQI
17th Sep 2025222 PMAQI
17th Sep 2025203 PMAQI
17th Sep 2025204 PMAQI
17th Sep 2025265 PMAQI
17th Sep 2025326 PMAQI
17th Sep 2025307 PMAQI
17th Sep 2025298 PMAQI
17th Sep 2025279 PMAQI
17th Sep 20252710 PMAQI
17th Sep 20252711 PMAQI
18th Sep 20252612 AMAQI
18th Sep 2025341 AMAQI
18th Sep 2025322 AMAQI
18th Sep 2025323 AMAQI
18th Sep 2025324 AMAQI
18th Sep 2025315 AMAQI
23°C20/27°C
18th Sep 2025306 AMAQI
18th Sep 2025327 AMAQI
18th Sep 2025338 AMAQI
18th Sep 2025419 AMAQI
18th Sep 20251810 AMAQI
18th Sep 20251711 AMAQI
18th Sep 20251712 PMAQI
18th Sep 2025201 PMAQI
18th Sep 2025192 PMAQI
18th Sep 2025213 PMAQI
18th Sep 2025224 PMAQI
18th Sep 2025275 PMAQI
18th Sep 2025306 PMAQI
18th Sep 2025337 PMAQI
18th Sep 2025278 PMAQI
18th Sep 2025299 PMAQI
18th Sep 20252710 PMAQI
18th Sep 20252511 PMAQI
19th Sep 20252412 AMAQI
19th Sep 2025241 AMAQI
19th Sep 2025322 AMAQI
19th Sep 2025323 AMAQI
19th Sep 2025314 AMAQI
19th Sep 2025305 AMAQI
23°C20/26°C
19th Sep 2025306 AMAQI
19th Sep 2025297 AMAQI
19th Sep 2025238 AMAQI
19th Sep 2025189 AMAQI
19th Sep 20251610 AMAQI
19th Sep 20251711 AMAQI
19th Sep 20252812 PMAQI
19th Sep 2025291 PMAQI
19th Sep 2025252 PMAQI
19th Sep 2025223 PMAQI
19th Sep 2025204 PMAQI
19th Sep 2025145 PMAQI
19th Sep 2025156 PMAQI
19th Sep 2025187 PMAQI
19th Sep 2025218 PMAQI
19th Sep 2025229 PMAQI
19th Sep 20252210 PMAQI
19th Sep 20253211 PMAQI
20th Sep 20253612 AMAQI
20th Sep 2025341 AMAQI
20th Sep 2025352 AMAQI
20th Sep 2025343 AMAQI
20th Sep 2025314 AMAQI
20th Sep 2025295 AMAQI
23°C20/28°C
20th Sep 2025296 AMAQI
20th Sep 2025287 AMAQI
20th Sep 2025208 AMAQI
20th Sep 2025229 AMAQI
20th Sep 20252010 AMAQI
20th Sep 20252111 AMAQI
20th Sep 20251712 PMAQI
20th Sep 2025181 PMAQI
20th Sep 2025202 PMAQI
20th Sep 2025223 PMAQI
20th Sep 2025224 PMAQI
20th Sep 2025205 PMAQI
20th Sep 2025246 PMAQI
20th Sep 2025257 PMAQI
20th Sep 2025328 PMAQI
20th Sep 2025459 PMAQI
20th Sep 20254810 PMAQI
20th Sep 20254411 PMAQI
21st Sep 20253412 AMAQI
21st Sep 2025301 AMAQI
21st Sep 2025342 AMAQI
21st Sep 2025343 AMAQI
21st Sep 2025354 AMAQI
21st Sep 2025325 AMAQI
23°C20/28°C
21st Sep 2025296 AMAQI
21st Sep 2025287 AMAQI
21st Sep 2025188 AMAQI
21st Sep 2025189 AMAQI
21st Sep 20251910 AMAQI
21st Sep 20251811 AMAQI
21st Sep 20251412 PMAQI
21st Sep 2025121 PMAQI
21st Sep 2025152 PMAQI
21st Sep 2025153 PMAQI
21st Sep 2025184 PMAQI
21st Sep 2025205 PMAQI
21st Sep 2025176 PMAQI
21st Sep 2025187 PMAQI
21st Sep 2025268 PMAQI
21st Sep 2025279 PMAQI
21st Sep 20252810 PMAQI
21st Sep 20252611 PMAQI
22nd Sep 20252712 AMAQI
22nd Sep 2025311 AMAQI
22nd Sep 2025312 AMAQI
22nd Sep 2025303 AMAQI
22nd Sep 2025294 AMAQI
22nd Sep 2025295 AMAQI
24°C21/28°C
22nd Sep 2025296 AMAQI
22nd Sep 2025347 AMAQI
22nd Sep 2025468 AMAQI
22nd Sep 2025499 AMAQI
22nd Sep 20254410 AMAQI
22nd Sep 20253311 AMAQI
22nd Sep 20252212 PMAQI
22nd Sep 2025211 PMAQI
22nd Sep 2025182 PMAQI
22nd Sep 2025183 PMAQI
22nd Sep 2025194 PMAQI
22nd Sep 2025195 PMAQI
22nd Sep 2025216 PMAQI
22nd Sep 2025267 PMAQI
22nd Sep 2025258 PMAQI
22nd Sep 2025239 PMAQI
22nd Sep 20252310 PMAQI
22nd Sep 20252111 PMAQI
23rd Sep 20252212 AMAQI
23rd Sep 2025281 AMAQI
23rd Sep 2025312 AMAQI
23rd Sep 2025313 AMAQI
23rd Sep 2025304 AMAQI
23rd Sep 2025315 AMAQI
23°C20/27°C
23rd Sep 2025306 AMAQI
23rd Sep 2025317 AMAQI
23rd Sep 2025228 AMAQI
23rd Sep 2025189 AMAQI
23rd Sep 20252010 AMAQI
23rd Sep 20251611 AMAQI
23rd Sep 20251512 PMAQI
23rd Sep 2025171 PMAQI
23rd Sep 2025152 PMAQI
23rd Sep 2025143 PMAQI
23rd Sep 2025164 PMAQI
23rd Sep 2025145 PMAQI
23rd Sep 2025146 PMAQI
23rd Sep 2025197 PMAQI
23rd Sep 2025228 PMAQI
23rd Sep 2025249 PMAQI
23rd Sep 20252310 PMAQI
23rd Sep 20252511 PMAQI
24th Sep 20252912 AMAQI
24th Sep 2025301 AMAQI
24th Sep 2025302 AMAQI
24th Sep 2025293 AMAQI
24th Sep 2025284 AMAQI
24th Sep 2025285 AMAQI
24°C20/28°C
24th Sep 2025286 AMAQI
6 AM24th Sep 2025287 AMAQI
24th Sep 2025328 AMAQI
24th Sep 2025359 AMAQI
24th Sep 20253810 AMAQI
24th Sep 20253711 AMAQI
24th Sep 20252712 PMAQI
12 PM24th Sep 2025261 PMAQI
24th Sep 2025252 PMAQI
24th Sep 2025233 PMAQI
24th Sep 2025224 PMAQI
24th Sep 2025245 PMAQI
24th Sep 2025206 PMAQI
6 PM24th Sep 2025207 PMAQI
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
4 PM
26AQI
1 hours / Day
30 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 4 PM to 4 PM (Avg. 26).
Night time
Avg. Highest Time
1 AM - 5 AM
38AQI
5 hours / Day
150 hours / Month
Avg. Lowest Time
7 PM
32AQI
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. 32).
2025 Days Vs Air Quality
Institute Of Forestry Sub Station, Chongshan, Hainan, China
2025
57%
152
41%
109
2%
5
Total number of days with different AQI categories in last 267 days in 2025 (98 days remaining)
Good
152 DaysModerate
109 DaysPoor
5 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 57%
Health Risk Level:
Considerable
In 2025, 57% of 267 days were within WHO’s safe air quality limits, and 43% exceeded them. The risk of health issues is Considerable, with potential for conditions in sensitive individuals.
Annual Air Quality Insights
Institute Of Forestry Sub Station, Chongshan, 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
95AQI
95AQI
2nd January 2025
80AQI
80AQI
3rd January 2025
91AQI
91AQI
4th January 2025
98AQI
98AQI
5th January 2025
110AQI
110AQI
6th January 2025
89AQI
89AQI
7th January 2025
91AQI
91AQI
8th January 2025
104AQI
104AQI
9th January 2025
96AQI
96AQI
10th January 2025
113AQI
113AQI
11th January 2025
92AQI
92AQI
12th January 2025
90AQI
90AQI
13th January 2025
80AQI
80AQI
14th January 2025
77AQI
77AQI
15th January 2025
55AQI
55AQI
16th January 2025
88AQI
88AQI
17th January 2025
91AQI
91AQI
18th January 2025
88AQI
88AQI
19th January 2025
98AQI
98AQI
20th January 2025
87AQI
87AQI
21st January 2025
87AQI
87AQI
22nd January 2025
86AQI
86AQI
23rd January 2025
72AQI
72AQI
24th January 2025
61AQI
61AQI
25th January 2025
59AQI
59AQI
26th January 2025
54AQI
54AQI
27th January 2025
65AQI
65AQI
28th January 2025
66AQI
66AQI
29th January 2025
78AQI
78AQI
30th January 2025
59AQI
59AQI
31st January 2025
67AQI
67AQI
1st February 2025
48AQI
48AQI
2nd February 2025
51AQI
51AQI
3rd February 2025
42AQI
42AQI
4th February 2025
38AQI
38AQI
5th February 2025
46AQI
46AQI
6th February 2025
57AQI
57AQI
7th February 2025
62AQI
62AQI
8th February 2025
49AQI
49AQI
9th February 2025
57AQI
57AQI
10th February 2025
56AQI
56AQI
11th February 2025
46AQI
46AQI
12th February 2025
39AQI
39AQI
13th February 2025
46AQI
46AQI
14th February 2025
44AQI
44AQI
15th February 2025
64AQI
64AQI
16th February 2025
45AQI
45AQI
17th February 2025
59AQI
59AQI
18th February 2025
68AQI
68AQI
19th February 2025
69AQI
69AQI
20th February 2025
62AQI
62AQI
21st February 2025
55AQI
55AQI
22nd February 2025
39AQI
39AQI
23rd February 2025
37AQI
37AQI
24th February 2025
32AQI
32AQI
25th February 2025
32AQI
32AQI
26th February 2025
37AQI
37AQI
27th February 2025
54AQI
54AQI
28th February 2025
50AQI
50AQI
1st March 2025
53AQI
53AQI
2nd March 2025
56AQI
56AQI
3rd March 2025
64AQI
64AQI
4th March 2025
46AQI
46AQI
5th March 2025
48AQI
48AQI
6th March 2025
38AQI
38AQI
7th March 2025
46AQI
46AQI
8th March 2025
31AQI
31AQI
9th March 2025
57AQI
57AQI
10th March 2025
51AQI
51AQI
11th March 2025
52AQI
52AQI
12th March 2025
46AQI
46AQI
13th March 2025
39AQI
39AQI
14th March 2025
37AQI
37AQI
15th March 2025
54AQI
54AQI
16th March 2025
49AQI
49AQI
17th March 2025
67AQI
67AQI
18th March 2025
63AQI
63AQI
19th March 2025
72AQI
72AQI
20th March 2025
69AQI
69AQI
21st March 2025
78AQI
78AQI
22nd March 2025
85AQI
85AQI
23rd March 2025
88AQI
88AQI
24th March 2025
83AQI
83AQI
25th March 2025
90AQI
90AQI
26th March 2025
75AQI
75AQI
27th March 2025
94AQI
94AQI
28th March 2025
72AQI
72AQI
29th March 2025
73AQI
73AQI
30th March 2025
49AQI
49AQI
31st March 2025
42AQI
42AQI
1st April 2025
48AQI
48AQI
2nd April 2025
61AQI
61AQI
3rd April 2025
63AQI
63AQI
4th April 2025
61AQI
61AQI
5th April 2025
64AQI
64AQI
6th April 2025
57AQI
57AQI
7th April 2025
53AQI
53AQI
8th April 2025
53AQI
53AQI
9th April 2025
78AQI
78AQI
10th April 2025
88AQI
88AQI
11th April 2025
77AQI
77AQI
12th April 2025
70AQI
70AQI
13th April 2025
87AQI
87AQI
14th April 2025
91AQI
91AQI
15th April 2025
103AQI
103AQI
16th April 2025
102AQI
102AQI
17th April 2025
98AQI
98AQI
18th April 2025
79AQI
79AQI
19th April 2025
64AQI
64AQI
20th April 2025
67AQI
67AQI
21st April 2025
63AQI
63AQI
22nd April 2025
69AQI
69AQI
23rd April 2025
58AQI
58AQI
24th April 2025
63AQI
63AQI
25th April 2025
66AQI
66AQI
26th April 2025
63AQI
63AQI
27th April 2025
64AQI
64AQI
28th April 2025
59AQI
59AQI
29th April 2025
47AQI
47AQI
30th April 2025
56AQI
56AQI
1st May 2025
59AQI
59AQI
2nd May 2025
68AQI
68AQI
3rd May 2025
69AQI
69AQI
4th May 2025
74AQI
74AQI
5th May 2025
58AQI
58AQI
6th May 2025
70AQI
70AQI
7th May 2025
70AQI
70AQI
8th May 2025
68AQI
68AQI
9th May 2025
68AQI
68AQI
10th May 2025
55AQI
55AQI
11th May 2025
65AQI
65AQI
12th May 2025
66AQI
66AQI
13th May 2025
69AQI
69AQI
14th May 2025
57AQI
57AQI
15th May 2025
43AQI
43AQI
16th May 2025
37AQI
37AQI
17th May 2025
40AQI
40AQI
18th May 2025
43AQI
43AQI
19th May 2025
41AQI
41AQI
20th May 2025
44AQI
44AQI
21st May 2025
46AQI
46AQI
22nd May 2025
38AQI
38AQI
23rd May 2025
36AQI
36AQI
24th May 2025
35AQI
35AQI
25th May 2025
40AQI
40AQI
26th May 2025
55AQI
55AQI
27th May 2025
45AQI
45AQI
28th May 2025
38AQI
38AQI
29th May 2025
34AQI
34AQI
30th May 2025
40AQI
40AQI
31st May 2025
36AQI
36AQI
1st June 2025
38AQI
38AQI
2nd June 2025
39AQI
39AQI
3rd June 2025
44AQI
44AQI
4th June 2025
50AQI
50AQI
5th June 2025
43AQI
43AQI
6th June 2025
46AQI
46AQI
7th June 2025
46AQI
46AQI
8th June 2025
47AQI
47AQI
9th June 2025
59AQI
59AQI
10th June 2025
60AQI
60AQI
11th June 2025
45AQI
45AQI
12th June 2025
35AQI
35AQI
13th June 2025
47AQI
47AQI
14th June 2025
35AQI
35AQI
15th June 2025
36AQI
36AQI
16th June 2025
41AQI
41AQI
17th June 2025
42AQI
42AQI
18th June 2025
37AQI
37AQI
19th June 2025
35AQI
35AQI
20th June 2025
33AQI
33AQI
21st June 2025
36AQI
36AQI
22nd June 2025
42AQI
42AQI
23rd June 2025
30AQI
30AQI
24th June 2025
30AQI
30AQI
25th June 2025
25AQI
25AQI
26th June 2025
26AQI
26AQI
27th June 2025
26AQI
26AQI
28th June 2025
24AQI
24AQI
29th June 2025
25AQI
25AQI
30th June 2025
24AQI
24AQI
1st July 2025
33AQI
33AQI
2nd July 2025
26AQI
26AQI
3rd July 2025
25AQI
25AQI
4th July 2025
25AQI
25AQI
5th July 2025
26AQI
26AQI
6th July 2025
25AQI
25AQI
7th July 2025
25AQI
25AQI
8th July 2025
29AQI
29AQI
9th July 2025
32AQI
32AQI
10th July 2025
32AQI
32AQI
11th July 2025
41AQI
41AQI
12th July 2025
34AQI
34AQI
13th July 2025
45AQI
45AQI
14th July 2025
48AQI
48AQI
15th July 2025
42AQI
42AQI
16th July 2025
41AQI
41AQI
17th July 2025
38AQI
38AQI
18th July 2025
40AQI
40AQI
19th July 2025
32AQI
32AQI
20th July 2025
30AQI
30AQI
21st July 2025
28AQI
28AQI
22nd July 2025
28AQI
28AQI
23rd July 2025
25AQI
25AQI
24th July 2025
25AQI
25AQI
25th July 2025
30AQI
30AQI
26th July 2025
28AQI
28AQI
27th July 2025
28AQI
28AQI
28th July 2025
26AQI
26AQI
29th July 2025
25AQI
25AQI
30th July 2025
32AQI
32AQI
31st July 2025
41AQI
41AQI
1st August 2025
55AQI
55AQI
2nd August 2025
56AQI
56AQI
3rd August 2025
55AQI
55AQI
4th August 2025
56AQI
56AQI
5th August 2025
54AQI
54AQI
6th August 2025
52AQI
52AQI
7th August 2025
49AQI
49AQI
8th August 2025
41AQI
41AQI
9th August 2025
37AQI
37AQI
10th August 2025
38AQI
38AQI
11th August 2025
39AQI
39AQI
12th August 2025
45AQI
45AQI
13th August 2025
43AQI
43AQI
14th August 2025
40AQI
40AQI
15th August 2025
38AQI
38AQI
16th August 2025
37AQI
37AQI
17th August 2025
34AQI
34AQI
18th August 2025
34AQI
34AQI
19th August 2025
33AQI
33AQI
20th August 2025
34AQI
34AQI
21st August 2025
37AQI
37AQI
22nd August 2025
37AQI
37AQI
23rd August 2025
39AQI
39AQI
24th August 2025
37AQI
37AQI
25th August 2025
37AQI
37AQI
26th August 2025
36AQI
36AQI
27th August 2025
35AQI
35AQI
28th August 2025
38AQI
38AQI
29th August 2025
42AQI
42AQI
30th August 2025
38AQI
38AQI
31st August 2025
39AQI
39AQI
1st September 2025
37AQI
37AQI
2nd September 2025
41AQI
41AQI
3rd September 2025
39AQI
39AQI
4th September 2025
34AQI
34AQI
5th September 2025
35AQI
35AQI
6th September 2025
33AQI
33AQI
7th September 2025
46AQI
46AQI
8th September 2025
42AQI
42AQI
9th September 2025
37AQI
37AQI
10th September 2025
36AQI
36AQI
11th September 2025
33AQI
33AQI
12th September 2025
33AQI
33AQI
13th September 2025
31AQI
31AQI
14th September 2025
30AQI
30AQI
15th September 2025
28AQI
28AQI
16th September 2025
25AQI
25AQI
17th September 2025
29AQI
29AQI
18th September 2025
28AQI
28AQI
19th September 2025
24AQI
24AQI
20th September 2025
29AQI
29AQI
21st September 2025
24AQI
24AQI
22nd September 2025
28AQI
28AQI
23rd September 2025
23AQI
23AQI
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
83AQI
49AQI
60AQI
69AQI
52AQI
38AQI
32AQI
41AQI
32AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202551AQI
28
3
16
12
11
20
2
26
2
16
15
28
2
31
25
6
23
152
109
5
Highest AQI recorded in
January83AQI
Lowest AQI recorded in
July32AQI
202444AQI
21
13
4
12
10
6
12
18
5
30
31
31
28
1
20
10
1
22
8
28
3
232
78
4
Highest AQI recorded in
December78AQI
Lowest AQI recorded in
July29AQI
202337AQI
3
8
1
4
8
1
2
1
1
1
5
2
9
4
1
3
28
2
60
23
1
Highest AQI recorded in
March62AQI
Lowest AQI recorded in
September16AQI
202237AQI
26
3
20
1
24
7
14
16
29
2
30
20
1
3
7
15
10
20
3
8
5
210
54
Highest AQI recorded in
September53AQI
Lowest AQI recorded in
August21AQI
202141AQI
2
27
2
12
16
22
9
22
8
29
2
22
5
30
1
30
1
29
1
26
5
16
14
13
17
1
253
106
3
Highest AQI recorded in
January67AQI
Lowest AQI recorded in
September26AQI
202036AQI
27
31
30
1
29
1
24
7
12
17
1
11
20
164
46
1
Highest AQI recorded in
December55AQI
Lowest AQI recorded in
September23AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2025(Avg.)
51AQILeast Polluted Year Recorded
2020(Avg.)
36AQIInstitute Of Forestry Sub Station's annual 2025 AQI (51) shows an average percentage change of 33.1% (worsened AQI) compared to previous years: 2020 (36), 2021 (41), 2022 (37), 2023 (37), 2024 (44).
