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+
August 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
1st Aug 2025
55AQILowest AQI recorded on
19th Aug 2021
21AQISame Day Analysis (1st August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 55 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 2nd Aug - 3rd Aug 2025
Institute Of Forestry Sub Station, Chongshan, Hainan, China
AQI
Day
Night
.
6 AM2nd Aug 2025
7 PM
5 AM3rd Aug 2025
Day time
Avg. Highest Time
12AMNaNth undefined
AQI
Avg. Lowest Time
12AMNaNth undefined
AQI
Night time
Avg. Highest Time
10PM2nd Aug
60AQI
Avg. Lowest Time
10AM2nd Aug
47AQI
In the last 24 hours,
Institute Of Forestry Sub Station's AQI reached its highest point of 60 at 10 PM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 2nd Aug and 3rd Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Institute Of Forestry Sub Station, Chongshan, Hainan, China
JulAug
04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd
Day
Night
4th Jul 2025286 AMAQI
4th Jul 2025287 AMAQI
4th Jul 2025248 AMAQI
4th Jul 2025209 AMAQI
4th Jul 20252110 AMAQI
4th Jul 20252011 AMAQI
4th Jul 20252312 PMAQI
4th Jul 2025181 PMAQI
4th Jul 2025232 PMAQI
4th Jul 2025193 PMAQI
4th Jul 2025184 PMAQI
4th Jul 2025205 PMAQI
4th Jul 2025286 PMAQI
4th Jul 2025207 PMAQI
4th Jul 2025288 PMAQI
4th Jul 2025279 PMAQI
4th Jul 20252410 PMAQI
4th Jul 20252411 PMAQI
5th Jul 20252512 AMAQI
5th Jul 2025261 AMAQI
5th Jul 2025312 AMAQI
5th Jul 2025303 AMAQI
5th Jul 2025284 AMAQI
5th Jul 2025305 AMAQI
22°C20/25°C
5th Jul 2025286 AMAQI
5th Jul 2025287 AMAQI
5th Jul 2025248 AMAQI
5th Jul 2025289 AMAQI
5th Jul 20252910 AMAQI
5th Jul 20251911 AMAQI
5th Jul 20252112 PMAQI
5th Jul 2025201 PMAQI
5th Jul 2025212 PMAQI
5th Jul 2025233 PMAQI
5th Jul 2025264 PMAQI
5th Jul 2025255 PMAQI
5th Jul 2025226 PMAQI
5th Jul 2025277 PMAQI
5th Jul 2025258 PMAQI
5th Jul 2025269 PMAQI
5th Jul 20252510 PMAQI
5th Jul 20252511 PMAQI
6th Jul 20252412 AMAQI
6th Jul 2025271 AMAQI
6th Jul 2025302 AMAQI
6th Jul 2025313 AMAQI
6th Jul 2025304 AMAQI
6th Jul 2025315 AMAQI
24°C21/31°C
6th Jul 2025306 AMAQI
6th Jul 2025307 AMAQI
6th Jul 2025268 AMAQI
6th Jul 2025279 AMAQI
6th Jul 20252210 AMAQI
6th Jul 20252011 AMAQI
6th Jul 20253312 PMAQI
6th Jul 2025231 PMAQI
6th Jul 2025192 PMAQI
6th Jul 2025193 PMAQI
6th Jul 2025224 PMAQI
6th Jul 2025205 PMAQI
6th Jul 2025236 PMAQI
6th Jul 2025217 PMAQI
6th Jul 2025248 PMAQI
6th Jul 2025239 PMAQI
6th Jul 20252510 PMAQI
6th Jul 20252411 PMAQI
7th Jul 20252412 AMAQI
7th Jul 2025241 AMAQI
7th Jul 2025312 AMAQI
7th Jul 2025313 AMAQI
7th Jul 2025304 AMAQI
7th Jul 2025315 AMAQI
24°C21/28°C
7th Jul 2025306 AMAQI
7th Jul 2025317 AMAQI
7th Jul 2025218 AMAQI
7th Jul 2025209 AMAQI
7th Jul 20251710 AMAQI
7th Jul 20251811 AMAQI
7th Jul 20252012 PMAQI
7th Jul 2025191 PMAQI
7th Jul 2025262 PMAQI
7th Jul 2025183 PMAQI
7th Jul 2025304 PMAQI
7th Jul 2025205 PMAQI
7th Jul 2025206 PMAQI
7th Jul 2025227 PMAQI
7th Jul 2025268 PMAQI
7th Jul 2025269 PMAQI
7th Jul 20252410 PMAQI
7th Jul 20252611 PMAQI
8th Jul 20253112 AMAQI
8th Jul 2025301 AMAQI
8th Jul 2025312 AMAQI
8th Jul 2025323 AMAQI
8th Jul 2025294 AMAQI
8th Jul 2025295 AMAQI
24°C21/27°C
8th Jul 2025296 AMAQI
8th Jul 2025307 AMAQI
8th Jul 2025248 AMAQI
8th Jul 2025309 AMAQI
8th Jul 20253010 AMAQI
8th Jul 20252811 AMAQI
8th Jul 20252912 PMAQI
8th Jul 2025341 PMAQI
8th Jul 2025362 PMAQI
8th Jul 2025263 PMAQI
8th Jul 2025274 PMAQI
8th Jul 2025235 PMAQI
8th Jul 2025256 PMAQI
8th Jul 2025307 PMAQI
8th Jul 2025268 PMAQI
8th Jul 2025289 PMAQI
8th Jul 20252610 PMAQI
8th Jul 20253611 PMAQI
9th Jul 20253812 AMAQI
9th Jul 2025381 AMAQI
9th Jul 2025372 AMAQI
9th Jul 2025363 AMAQI
9th Jul 2025364 AMAQI
9th Jul 2025365 AMAQI
25°C22/29°C
9th Jul 2025326 AMAQI
9th Jul 2025337 AMAQI
9th Jul 2025258 AMAQI
9th Jul 2025239 AMAQI
9th Jul 20253310 AMAQI
9th Jul 20253411 AMAQI
9th Jul 20253812 PMAQI
9th Jul 2025401 PMAQI
9th Jul 2025272 PMAQI
9th Jul 2025263 PMAQI
9th Jul 2025264 PMAQI
9th Jul 2025265 PMAQI
9th Jul 2025256 PMAQI
9th Jul 2025307 PMAQI
9th Jul 2025328 PMAQI
9th Jul 2025329 PMAQI
9th Jul 20253210 PMAQI
9th Jul 20252911 PMAQI
10th Jul 20252912 AMAQI
10th Jul 2025311 AMAQI
10th Jul 2025372 AMAQI
10th Jul 2025373 AMAQI
10th Jul 2025374 AMAQI
10th Jul 2025375 AMAQI
25°C21/29°C
10th Jul 2025366 AMAQI
10th Jul 2025367 AMAQI
10th Jul 2025328 AMAQI
10th Jul 2025189 AMAQI
10th Jul 20253310 AMAQI
10th Jul 20253411 AMAQI
10th Jul 20253212 PMAQI
10th Jul 2025321 PMAQI
10th Jul 2025292 PMAQI
10th Jul 2025283 PMAQI
10th Jul 2025304 PMAQI
10th Jul 2025305 PMAQI
10th Jul 2025246 PMAQI
10th Jul 2025257 PMAQI
10th Jul 2025308 PMAQI
10th Jul 2025289 PMAQI
10th Jul 20252810 PMAQI
10th Jul 20254011 PMAQI
11th Jul 20254312 AMAQI
11th Jul 2025421 AMAQI
11th Jul 2025452 AMAQI
11th Jul 2025483 AMAQI
11th Jul 2025464 AMAQI
11th Jul 2025445 AMAQI
25°C22/28°C
11th Jul 2025446 AMAQI
11th Jul 2025427 AMAQI
11th Jul 2025418 AMAQI
11th Jul 2025249 AMAQI
11th Jul 20252810 AMAQI
11th Jul 20253411 AMAQI
11th Jul 20253412 PMAQI
11th Jul 2025341 PMAQI
11th Jul 2025342 PMAQI
11th Jul 2025463 PMAQI
11th Jul 2025504 PMAQI
11th Jul 2025495 PMAQI
11th Jul 2025466 PMAQI
11th Jul 2025467 PMAQI
11th Jul 2025528 PMAQI
11th Jul 2025399 PMAQI
11th Jul 20253110 PMAQI
11th Jul 20253411 PMAQI
12th Jul 20253312 AMAQI
12th Jul 2025331 AMAQI
12th Jul 2025462 AMAQI
12th Jul 2025463 AMAQI
12th Jul 2025454 AMAQI
12th Jul 2025455 AMAQI
24°C21/28°C
12th Jul 2025466 AMAQI
12th Jul 2025457 AMAQI
12th Jul 2025268 AMAQI
12th Jul 2025229 AMAQI
12th Jul 20252810 AMAQI
12th Jul 20252511 AMAQI
12th Jul 20252512 PMAQI
12th Jul 2025261 PMAQI
12th Jul 2025232 PMAQI
12th Jul 2025263 PMAQI
12th Jul 2025244 PMAQI
12th Jul 2025265 PMAQI
12th Jul 2025236 PMAQI
12th Jul 2025297 PMAQI
12th Jul 2025338 PMAQI
12th Jul 2025329 PMAQI
12th Jul 20253010 PMAQI
12th Jul 20254411 PMAQI
13th Jul 20255212 AMAQI
13th Jul 2025521 AMAQI
13th Jul 2025472 AMAQI
13th Jul 2025423 AMAQI
13th Jul 2025404 AMAQI
13th Jul 2025395 AMAQI
25°C21/30°C
13th Jul 2025406 AMAQI
13th Jul 2025407 AMAQI
13th Jul 2025358 AMAQI
13th Jul 2025369 AMAQI
13th Jul 20254010 AMAQI
13th Jul 20254711 AMAQI
13th Jul 20255012 PMAQI
13th Jul 2025511 PMAQI
13th Jul 2025502 PMAQI
13th Jul 2025493 PMAQI
13th Jul 2025484 PMAQI
13th Jul 2025485 PMAQI
13th Jul 2025486 PMAQI
13th Jul 2025497 PMAQI
13th Jul 2025478 PMAQI
13th Jul 2025459 PMAQI
13th Jul 20254410 PMAQI
13th Jul 20254611 PMAQI
14th Jul 20254612 AMAQI
14th Jul 2025461 AMAQI
14th Jul 2025532 AMAQI
14th Jul 2025533 AMAQI
14th Jul 2025514 AMAQI
14th Jul 2025485 AMAQI
25°C21/30°C
14th Jul 2025486 AMAQI
14th Jul 2025487 AMAQI
14th Jul 2025458 AMAQI
14th Jul 2025429 AMAQI
14th Jul 20254410 AMAQI
14th Jul 20255011 AMAQI
14th Jul 20255012 PMAQI
14th Jul 2025511 PMAQI
14th Jul 2025522 PMAQI
14th Jul 2025503 PMAQI
14th Jul 2025524 PMAQI
14th Jul 2025535 PMAQI
14th Jul 2025536 PMAQI
14th Jul 2025507 PMAQI
14th Jul 2025528 PMAQI
14th Jul 2025459 PMAQI
14th Jul 20253510 PMAQI
14th Jul 20253411 PMAQI
15th Jul 20253412 AMAQI
15th Jul 2025331 AMAQI
15th Jul 2025432 AMAQI
15th Jul 2025463 AMAQI
15th Jul 2025474 AMAQI
15th Jul 2025485 AMAQI
26°C22/31°C
15th Jul 2025506 AMAQI
15th Jul 2025527 AMAQI
15th Jul 2025568 AMAQI
15th Jul 2025549 AMAQI
15th Jul 20255210 AMAQI
15th Jul 20255111 AMAQI
15th Jul 20254912 PMAQI
15th Jul 2025411 PMAQI
15th Jul 2025312 PMAQI
15th Jul 2025303 PMAQI
15th Jul 2025304 PMAQI
15th Jul 2025315 PMAQI
15th Jul 2025336 PMAQI
15th Jul 2025397 PMAQI
15th Jul 2025428 PMAQI
15th Jul 2025419 PMAQI
15th Jul 20254010 PMAQI
15th Jul 20254411 PMAQI
16th Jul 20254312 AMAQI
16th Jul 2025431 AMAQI
16th Jul 2025462 AMAQI
16th Jul 2025463 AMAQI
16th Jul 2025464 AMAQI
16th Jul 2025455 AMAQI
26°C23/32°C
16th Jul 2025456 AMAQI
16th Jul 2025467 AMAQI
16th Jul 2025318 AMAQI
16th Jul 2025329 AMAQI
16th Jul 20253010 AMAQI
16th Jul 20253611 AMAQI
16th Jul 20253712 PMAQI
16th Jul 2025371 PMAQI
16th Jul 2025372 PMAQI
16th Jul 2025363 PMAQI
16th Jul 2025374 PMAQI
16th Jul 2025375 PMAQI
16th Jul 2025386 PMAQI
16th Jul 2025427 PMAQI
16th Jul 2025428 PMAQI
16th Jul 2025439 PMAQI
16th Jul 20254310 PMAQI
16th Jul 20255111 PMAQI
17th Jul 20254512 AMAQI
17th Jul 2025441 AMAQI
17th Jul 2025472 AMAQI
17th Jul 2025463 AMAQI
17th Jul 2025464 AMAQI
17th Jul 2025445 AMAQI
26°C22/32°C
17th Jul 2025446 AMAQI
17th Jul 2025447 AMAQI
17th Jul 2025468 AMAQI
17th Jul 2025439 AMAQI
17th Jul 20254210 AMAQI
17th Jul 20253711 AMAQI
17th Jul 20253812 PMAQI
17th Jul 2025461 PMAQI
17th Jul 2025292 PMAQI
17th Jul 2025243 PMAQI
17th Jul 2025314 PMAQI
17th Jul 2025315 PMAQI
17th Jul 2025256 PMAQI
17th Jul 2025327 PMAQI
17th Jul 2025378 PMAQI
17th Jul 2025369 PMAQI
17th Jul 20253610 PMAQI
17th Jul 20253011 PMAQI
18th Jul 20253412 AMAQI
18th Jul 2025351 AMAQI
18th Jul 2025472 AMAQI
18th Jul 2025463 AMAQI
18th Jul 2025444 AMAQI
18th Jul 2025455 AMAQI
26°C22/32°C
18th Jul 2025446 AMAQI
18th Jul 2025447 AMAQI
18th Jul 2025298 AMAQI
18th Jul 2025259 AMAQI
18th Jul 20253410 AMAQI
18th Jul 20252611 AMAQI
18th Jul 20253712 PMAQI
18th Jul 2025411 PMAQI
18th Jul 2025452 PMAQI
18th Jul 2025463 PMAQI
18th Jul 2025464 PMAQI
18th Jul 2025435 PMAQI
18th Jul 2025426 PMAQI
18th Jul 2025467 PMAQI
18th Jul 2025508 PMAQI
18th Jul 2025429 PMAQI
18th Jul 20253310 PMAQI
18th Jul 20253411 PMAQI
19th Jul 20253412 AMAQI
19th Jul 2025401 AMAQI
19th Jul 2025452 AMAQI
19th Jul 2025433 AMAQI
19th Jul 2025424 AMAQI
19th Jul 2025435 AMAQI
27°C23/31°C
19th Jul 2025436 AMAQI
19th Jul 2025437 AMAQI
19th Jul 2025278 AMAQI
19th Jul 2025229 AMAQI
19th Jul 20252510 AMAQI
19th Jul 20252411 AMAQI
19th Jul 20252412 PMAQI
19th Jul 2025221 PMAQI
19th Jul 2025222 PMAQI
19th Jul 2025273 PMAQI
19th Jul 2025234 PMAQI
19th Jul 2025225 PMAQI
19th Jul 2025216 PMAQI
19th Jul 2025267 PMAQI
19th Jul 2025318 PMAQI
19th Jul 2025329 PMAQI
19th Jul 20253210 PMAQI
19th Jul 20253011 PMAQI
20th Jul 20253012 AMAQI
20th Jul 2025421 AMAQI
20th Jul 2025452 AMAQI
20th Jul 2025423 AMAQI
20th Jul 2025414 AMAQI
20th Jul 2025405 AMAQI
23°C20/25°C
20th Jul 2025396 AMAQI
20th Jul 2025407 AMAQI
20th Jul 2025288 AMAQI
20th Jul 2025189 AMAQI
20th Jul 20251610 AMAQI
20th Jul 20251811 AMAQI
20th Jul 20252212 PMAQI
20th Jul 2025221 PMAQI
20th Jul 2025192 PMAQI
20th Jul 2025203 PMAQI
20th Jul 2025194 PMAQI
20th Jul 2025225 PMAQI
20th Jul 2025226 PMAQI
20th Jul 2025297 PMAQI
20th Jul 2025298 PMAQI
20th Jul 2025329 PMAQI
20th Jul 20253210 PMAQI
20th Jul 20253611 PMAQI
21st Jul 20253612 AMAQI
21st Jul 2025401 AMAQI
21st Jul 2025422 AMAQI
21st Jul 2025393 AMAQI
21st Jul 2025364 AMAQI
21st Jul 2025375 AMAQI
22°C20/24°C
21st Jul 2025386 AMAQI
21st Jul 2025377 AMAQI
21st Jul 2025208 AMAQI
21st Jul 2025149 AMAQI
21st Jul 20251610 AMAQI
21st Jul 20251911 AMAQI
21st Jul 20251912 PMAQI
21st Jul 2025181 PMAQI
21st Jul 2025182 PMAQI
21st Jul 2025173 PMAQI
21st Jul 2025184 PMAQI
21st Jul 2025205 PMAQI
21st Jul 2025186 PMAQI
21st Jul 2025247 PMAQI
21st Jul 2025328 PMAQI
21st Jul 2025309 PMAQI
21st Jul 20253210 PMAQI
21st Jul 20253211 PMAQI
22nd Jul 20253012 AMAQI
22nd Jul 2025331 AMAQI
22nd Jul 2025402 AMAQI
22nd Jul 2025383 AMAQI
22nd Jul 2025364 AMAQI
22nd Jul 2025365 AMAQI
22°C20/23°C
22nd Jul 2025366 AMAQI
22nd Jul 2025367 AMAQI
22nd Jul 2025228 AMAQI
22nd Jul 2025299 AMAQI
22nd Jul 20252410 AMAQI
22nd Jul 20252011 AMAQI
22nd Jul 20252112 PMAQI
22nd Jul 2025201 PMAQI
22nd Jul 2025162 PMAQI
22nd Jul 2025183 PMAQI
22nd Jul 2025204 PMAQI
22nd Jul 2025165 PMAQI
22nd Jul 2025166 PMAQI
22nd Jul 2025207 PMAQI
22nd Jul 2025288 PMAQI
22nd Jul 2025309 PMAQI
22nd Jul 20253210 PMAQI
22nd Jul 20253111 PMAQI
23rd Jul 20252812 AMAQI
23rd Jul 2025341 AMAQI
23rd Jul 2025362 AMAQI
23rd Jul 2025353 AMAQI
23rd Jul 2025344 AMAQI
23rd Jul 2025345 AMAQI
23°C20/24°C
23rd Jul 2025346 AMAQI
23rd Jul 2025347 AMAQI
23rd Jul 2025228 AMAQI
23rd Jul 2025169 AMAQI
23rd Jul 20251610 AMAQI
23rd Jul 20251711 AMAQI
23rd Jul 20251612 PMAQI
23rd Jul 2025171 PMAQI
23rd Jul 2025162 PMAQI
23rd Jul 2025153 PMAQI
23rd Jul 2025144 PMAQI
23rd Jul 2025175 PMAQI
23rd Jul 2025186 PMAQI
23rd Jul 2025197 PMAQI
23rd Jul 2025258 PMAQI
23rd Jul 2025269 PMAQI
23rd Jul 20252610 PMAQI
23rd Jul 20252411 PMAQI
24th Jul 20252412 AMAQI
24th Jul 2025241 AMAQI
24th Jul 2025232 AMAQI
24th Jul 2025263 AMAQI
24th Jul 2025364 AMAQI
24th Jul 2025395 AMAQI
23°C20/28°C
24th Jul 2025396 AMAQI
24th Jul 2025387 AMAQI
24th Jul 2025398 AMAQI
24th Jul 2025349 AMAQI
24th Jul 20251610 AMAQI
24th Jul 20251611 AMAQI
24th Jul 20252012 PMAQI
24th Jul 2025171 PMAQI
24th Jul 2025262 PMAQI
24th Jul 2025273 PMAQI
24th Jul 2025184 PMAQI
24th Jul 2025165 PMAQI
24th Jul 2025166 PMAQI
24th Jul 2025207 PMAQI
24th Jul 2025238 PMAQI
24th Jul 2025229 PMAQI
24th Jul 20252310 PMAQI
24th Jul 20252411 PMAQI
25th Jul 20252512 AMAQI
25th Jul 2025241 AMAQI
25th Jul 2025272 AMAQI
25th Jul 2025323 AMAQI
25th Jul 2025324 AMAQI
25th Jul 2025325 AMAQI
24°C20/28°C
25th Jul 2025326 AMAQI
25th Jul 2025317 AMAQI
25th Jul 2025228 AMAQI
25th Jul 2025179 AMAQI
25th Jul 20251810 AMAQI
25th Jul 20251811 AMAQI
25th Jul 20251912 PMAQI
25th Jul 2025181 PMAQI
25th Jul 2025182 PMAQI
25th Jul 2025173 PMAQI
25th Jul 2025174 PMAQI
25th Jul 2025315 PMAQI
25th Jul 2025476 PMAQI
25th Jul 2025427 PMAQI
25th Jul 2025448 PMAQI
25th Jul 2025429 PMAQI
25th Jul 20254410 PMAQI
25th Jul 20254211 PMAQI
26th Jul 20254012 AMAQI
26th Jul 2025381 AMAQI
26th Jul 2025372 AMAQI
26th Jul 2025383 AMAQI
26th Jul 2025414 AMAQI
26th Jul 2025425 AMAQI
23°C20/28°C
26th Jul 2025426 AMAQI
26th Jul 2025397 AMAQI
26th Jul 2025228 AMAQI
26th Jul 2025189 AMAQI
26th Jul 20251810 AMAQI
26th Jul 20251811 AMAQI
26th Jul 20251712 PMAQI
26th Jul 2025201 PMAQI
26th Jul 2025192 PMAQI
26th Jul 2025183 PMAQI
26th Jul 2025174 PMAQI
26th Jul 2025185 PMAQI
26th Jul 2025176 PMAQI
26th Jul 2025227 PMAQI
26th Jul 2025268 PMAQI
26th Jul 2025289 PMAQI
26th Jul 20252810 PMAQI
26th Jul 20252811 PMAQI
27th Jul 20252812 AMAQI
27th Jul 2025331 AMAQI
27th Jul 2025402 AMAQI
27th Jul 2025393 AMAQI
27th Jul 2025364 AMAQI
27th Jul 2025365 AMAQI
25°C21/32°C
27th Jul 2025366 AMAQI
27th Jul 2025357 AMAQI
27th Jul 2025348 AMAQI
27th Jul 2025219 AMAQI
27th Jul 20252210 AMAQI
27th Jul 20252011 AMAQI
27th Jul 20252212 PMAQI
27th Jul 2025381 PMAQI
27th Jul 2025202 PMAQI
27th Jul 2025193 PMAQI
27th Jul 2025184 PMAQI
27th Jul 2025185 PMAQI
27th Jul 2025196 PMAQI
27th Jul 2025247 PMAQI
27th Jul 2025258 PMAQI
27th Jul 2025289 PMAQI
27th Jul 20253010 PMAQI
27th Jul 20253011 PMAQI
28th Jul 20252612 AMAQI
28th Jul 2025331 AMAQI
28th Jul 2025362 AMAQI
28th Jul 2025353 AMAQI
28th Jul 2025354 AMAQI
28th Jul 2025345 AMAQI
24°C21/30°C
28th Jul 2025346 AMAQI
28th Jul 2025347 AMAQI
28th Jul 2025218 AMAQI
28th Jul 2025179 AMAQI
28th Jul 20251710 AMAQI
28th Jul 20252011 AMAQI
28th Jul 20252012 PMAQI
28th Jul 2025181 PMAQI
28th Jul 2025162 PMAQI
28th Jul 2025253 PMAQI
28th Jul 2025274 PMAQI
28th Jul 2025155 PMAQI
28th Jul 2025166 PMAQI
28th Jul 2025207 PMAQI
28th Jul 2025258 PMAQI
28th Jul 2025269 PMAQI
28th Jul 20252810 PMAQI
28th Jul 20252711 PMAQI
29th Jul 20252612 AMAQI
29th Jul 2025311 AMAQI
29th Jul 2025372 AMAQI
29th Jul 2025343 AMAQI
29th Jul 2025334 AMAQI
29th Jul 2025325 AMAQI
23°C20/26°C
29th Jul 2025326 AMAQI
29th Jul 2025327 AMAQI
29th Jul 2025228 AMAQI
29th Jul 2025189 AMAQI
29th Jul 20251710 AMAQI
29th Jul 20252011 AMAQI
29th Jul 20251912 PMAQI
29th Jul 2025171 PMAQI
29th Jul 2025182 PMAQI
29th Jul 2025183 PMAQI
29th Jul 2025184 PMAQI
29th Jul 2025185 PMAQI
29th Jul 2025176 PMAQI
29th Jul 2025207 PMAQI
29th Jul 2025238 PMAQI
29th Jul 2025269 PMAQI
29th Jul 20252710 PMAQI
29th Jul 20252611 PMAQI
30th Jul 20252512 AMAQI
30th Jul 2025261 AMAQI
30th Jul 2025262 AMAQI
30th Jul 2025303 AMAQI
30th Jul 2025284 AMAQI
30th Jul 2025345 AMAQI
25°C21/28°C
30th Jul 2025356 AMAQI
30th Jul 2025367 AMAQI
30th Jul 2025348 AMAQI
30th Jul 2025389 AMAQI
30th Jul 20253810 AMAQI
30th Jul 20253411 AMAQI
30th Jul 20253512 PMAQI
30th Jul 2025381 PMAQI
30th Jul 2025592 PMAQI
30th Jul 2025453 PMAQI
30th Jul 2025344 PMAQI
30th Jul 2025335 PMAQI
30th Jul 2025386 PMAQI
30th Jul 2025337 PMAQI
30th Jul 2025248 PMAQI
30th Jul 2025239 PMAQI
30th Jul 20252410 PMAQI
30th Jul 20252411 PMAQI
31st Jul 20253812 AMAQI
31st Jul 2025421 AMAQI
31st Jul 2025442 AMAQI
31st Jul 2025403 AMAQI
31st Jul 2025404 AMAQI
31st Jul 2025405 AMAQI
24°C20/27°C
31st Jul 2025406 AMAQI
31st Jul 2025407 AMAQI
31st Jul 2025408 AMAQI
31st Jul 2025409 AMAQI
31st Jul 20254910 AMAQI
31st Jul 20253411 AMAQI
31st Jul 20252412 PMAQI
31st Jul 2025261 PMAQI
31st Jul 2025222 PMAQI
31st Jul 2025223 PMAQI
31st Jul 2025214 PMAQI
31st Jul 2025205 PMAQI
31st Jul 2025466 PMAQI
31st Jul 2025547 PMAQI
31st Jul 2025548 PMAQI
31st Jul 2025569 PMAQI
31st Jul 20255910 PMAQI
31st Jul 20255711 PMAQI
1st Aug 20255512 AMAQI
1st Aug 2025581 AMAQI
1st Aug 2025562 AMAQI
1st Aug 2025543 AMAQI
1st Aug 2025544 AMAQI
1st Aug 2025565 AMAQI
25°C21/28°C
1st Aug 2025556 AMAQI
1st Aug 2025557 AMAQI
1st Aug 2025518 AMAQI
1st Aug 2025539 AMAQI
1st Aug 20255210 AMAQI
1st Aug 20255511 AMAQI
1st Aug 20255512 PMAQI
1st Aug 2025551 PMAQI
1st Aug 2025562 PMAQI
1st Aug 2025533 PMAQI
1st Aug 2025544 PMAQI
1st Aug 2025565 PMAQI
1st Aug 2025506 PMAQI
1st Aug 2025577 PMAQI
1st Aug 2025568 PMAQI
1st Aug 2025569 PMAQI
1st Aug 20255610 PMAQI
1st Aug 20255511 PMAQI
2nd Aug 20255712 AMAQI
2nd Aug 2025551 AMAQI
2nd Aug 2025562 AMAQI
2nd Aug 2025563 AMAQI
2nd Aug 2025564 AMAQI
2nd Aug 2025565 AMAQI
25°C21/28°C
2nd Aug 2025576 AMAQI
2nd Aug 2025567 AMAQI
2nd Aug 2025528 AMAQI
2nd Aug 2025509 AMAQI
2nd Aug 20254710 AMAQI
2nd Aug 20255211 AMAQI
2nd Aug 20255612 PMAQI
2nd Aug 2025541 PMAQI
2nd Aug 2025582 PMAQI
2nd Aug 2025543 PMAQI
2nd Aug 2025534 PMAQI
2nd Aug 2025575 PMAQI
2nd Aug 2025566 PMAQI
2nd Aug 2025557 PMAQI
2nd Aug 2025578 PMAQI
2nd Aug 2025589 PMAQI
2nd Aug 20256010 PMAQI
2nd Aug 20255811 PMAQI
3rd Aug 20255612 AMAQI
3rd Aug 2025581 AMAQI
--°C/°C
6 AM
12 PM
7 PM
12 AM
5 AM
--°C/°C
Day time
Avg. Highest Time
6 AM - 7 AM
39AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
9 AM - 6 PM
29AQI
10 hours / Day
300 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 7 AM (Avg. 39), while the lowest AQI was between 9 AM to 6 PM (Avg. 29).
Night time
Avg. Highest Time
2 AM - 5 AM
39AQI
4 hours / Day
120 hours / Month
Avg. Lowest Time
8 PM - 11 PM
35AQI
4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 2 AM to 5 AM (Avg. 39), while the lowest AQI was between 8 PM to 11 PM (Avg. 35).
2025 Days Vs Air Quality
Institute Of Forestry Sub Station, Chongshan, Hainan, China
2025
49%
104
49%
104
2%
5
Total number of days with different AQI categories in last 214 days in 2025 (151 days remaining)
Good
104 DaysModerate
104 DaysPoor
5 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 49%
Health Risk Level:
Significant
In 2025, 49% of 214 days were within WHO’s safe air quality limits, and 51% exceeded them. The risk of health issues is Significant, especially for those with existing respiratory or heart conditions.
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.
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
83AQI
49AQI
60AQI
69AQI
52AQI
38AQI
32AQI
55AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202555AQI
28
3
16
12
11
20
2
26
2
16
15
28
2
31
1
104
104
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.)
55AQILeast Polluted Year Recorded
2020(Avg.)
36AQIInstitute Of Forestry Sub Station's annual 2025 AQI (55) shows an average percentage change of 42.2% (worsened AQI) compared to previous years: 2020 (36), 2021 (41), 2022 (37), 2023 (37), 2024 (44).
