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HistoryAQIPM2.5PM10COSO2NO2O3

Environmental Resources Monitoring Unit, Haikou, 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

Environmental Resources Monitoring Unit, Haikou, Hainan, China

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
2nd Sep 2021
155AQI
Lowest AQI recorded on
8th Sep 2021
12AQI

Same Day Analysis (23rd September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 34 of Good air quality, showing improvement over 2024 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 23rd Sep - 24th Sep 2025

Environmental Resources Monitoring Unit, Haikou, Hainan, China

AQI
Day
Night
.

6 AM23rd Sep 2025

6 PM

5 AM24th Sep 2025

Day time
Avg. Highest Time
1PM23rd Sep

53AQI

Avg. Lowest Time
11AM23rd Sep

30AQI

Night time
Avg. Highest Time
12AM24th Sep

52AQI

Avg. Lowest Time
2AM24th Sep

34AQI

In the last 24 hours,

Environmental Resources Monitoring Unit's AQI reached its highest point of 53 at 1 PM during the Day, while the lowest point, 30, was recorded at 11 AM during the Day between 23rd Sep and 24th Sep 2025.

Day & Night AQI Trend : Aug - Sep 2025

Environmental Resources Monitoring Unit, Haikou, 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 2025406 AMAQI
25th Aug 2025397 AMAQI
25th Aug 2025248 AMAQI
25th Aug 2025279 AMAQI
25th Aug 20252010 AMAQI
25th Aug 20252311 AMAQI
25th Aug 20252612 PMAQI
25th Aug 2025261 PMAQI
25th Aug 2025242 PMAQI
25th Aug 2025273 PMAQI
25th Aug 2025364 PMAQI
25th Aug 2025265 PMAQI
25th Aug 2025236 PMAQI
25th Aug 2025347 PMAQI
25th Aug 2025358 PMAQI
25th Aug 2025339 PMAQI
25th Aug 20253110 PMAQI
25th Aug 20253111 PMAQI
26th Aug 20253212 AMAQI
26th Aug 2025381 AMAQI
26th Aug 2025382 AMAQI
26th Aug 2025383 AMAQI
26th Aug 2025374 AMAQI
26th Aug 2025375 AMAQI

25°C23/27°C

26th Aug 2025386 AMAQI
26th Aug 2025377 AMAQI
26th Aug 2025308 AMAQI
26th Aug 2025429 AMAQI
26th Aug 20253210 AMAQI
26th Aug 20252811 AMAQI
26th Aug 20253312 PMAQI
26th Aug 2025381 PMAQI
26th Aug 2025322 PMAQI
26th Aug 2025363 PMAQI
26th Aug 2025214 PMAQI
26th Aug 2025255 PMAQI
26th Aug 2025296 PMAQI
26th Aug 2025367 PMAQI
26th Aug 2025378 PMAQI
26th Aug 2025389 PMAQI
26th Aug 20253310 PMAQI
26th Aug 20253311 PMAQI
27th Aug 20254012 AMAQI
27th Aug 2025381 AMAQI
27th Aug 2025402 AMAQI
27th Aug 2025383 AMAQI
27th Aug 2025384 AMAQI
27th Aug 2025385 AMAQI

26°C24/29°C

27th Aug 2025386 AMAQI
27th Aug 2025387 AMAQI
27th Aug 2025318 AMAQI
27th Aug 2025339 AMAQI
27th Aug 20255210 AMAQI
27th Aug 20255411 AMAQI
27th Aug 20254612 PMAQI
27th Aug 2025291 PMAQI
27th Aug 2025362 PMAQI
27th Aug 2025303 PMAQI
27th Aug 2025404 PMAQI
27th Aug 2025275 PMAQI
27th Aug 2025266 PMAQI
27th Aug 2025327 PMAQI
27th Aug 2025318 PMAQI
27th Aug 2025439 PMAQI
27th Aug 20253510 PMAQI
27th Aug 20253611 PMAQI
28th Aug 20253912 AMAQI
28th Aug 2025391 AMAQI
28th Aug 2025402 AMAQI
28th Aug 2025393 AMAQI
28th Aug 2025414 AMAQI
28th Aug 2025395 AMAQI

26°C24/30°C

28th Aug 2025406 AMAQI
28th Aug 2025397 AMAQI
28th Aug 2025408 AMAQI
28th Aug 2025509 AMAQI
28th Aug 20254710 AMAQI
28th Aug 20253411 AMAQI
28th Aug 20253712 PMAQI
28th Aug 2025401 PMAQI
28th Aug 2025382 PMAQI
28th Aug 2025393 PMAQI
28th Aug 2025504 PMAQI
28th Aug 2025445 PMAQI
28th Aug 2025496 PMAQI
28th Aug 2025367 PMAQI
28th Aug 2025288 PMAQI
28th Aug 2025329 PMAQI
28th Aug 20253310 PMAQI
28th Aug 20253011 PMAQI
29th Aug 20253012 AMAQI
29th Aug 2025451 AMAQI
29th Aug 2025462 AMAQI
29th Aug 2025433 AMAQI
29th Aug 2025464 AMAQI
29th Aug 2025455 AMAQI

26°C23/31°C

29th Aug 2025476 AMAQI
29th Aug 2025477 AMAQI
29th Aug 2025518 AMAQI
29th Aug 2025309 AMAQI
29th Aug 20253610 AMAQI
29th Aug 20253211 AMAQI
29th Aug 20253712 PMAQI
29th Aug 2025331 PMAQI
29th Aug 2025452 PMAQI
29th Aug 2025363 PMAQI
29th Aug 2025364 PMAQI
29th Aug 2025355 PMAQI
29th Aug 2025506 PMAQI
29th Aug 2025487 PMAQI
29th Aug 2025428 PMAQI
29th Aug 2025379 PMAQI
29th Aug 20253410 PMAQI
29th Aug 20253311 PMAQI
30th Aug 20253812 AMAQI
30th Aug 2025461 AMAQI
30th Aug 2025462 AMAQI
30th Aug 2025463 AMAQI
30th Aug 2025444 AMAQI
30th Aug 2025445 AMAQI

25°C24/27°C

30th Aug 2025436 AMAQI
30th Aug 2025437 AMAQI
30th Aug 2025218 AMAQI
30th Aug 2025189 AMAQI
30th Aug 20252210 AMAQI
30th Aug 20252211 AMAQI
30th Aug 20252112 PMAQI
30th Aug 2025301 PMAQI
30th Aug 2025242 PMAQI
30th Aug 2025313 PMAQI
30th Aug 2025284 PMAQI
30th Aug 2025305 PMAQI
30th Aug 2025286 PMAQI
30th Aug 2025337 PMAQI
30th Aug 2025358 PMAQI
30th Aug 2025379 PMAQI
30th Aug 20253410 PMAQI
30th Aug 20253611 PMAQI
31st Aug 20253612 AMAQI
31st Aug 2025391 AMAQI
31st Aug 2025502 AMAQI
31st Aug 2025443 AMAQI
31st Aug 2025404 AMAQI
31st Aug 2025415 AMAQI

26°C25/28°C

31st Aug 2025426 AMAQI
31st Aug 2025417 AMAQI
31st Aug 2025288 AMAQI
31st Aug 2025189 AMAQI
31st Aug 20251910 AMAQI
31st Aug 20251911 AMAQI
31st Aug 20252612 PMAQI
31st Aug 2025331 PMAQI
31st Aug 2025332 PMAQI
31st Aug 2025323 PMAQI
31st Aug 2025344 PMAQI
31st Aug 2025275 PMAQI
31st Aug 2025266 PMAQI
31st Aug 2025357 PMAQI
31st Aug 2025308 PMAQI
31st Aug 2025329 PMAQI
31st Aug 20254010 PMAQI
31st Aug 20254111 PMAQI
1st Sep 20253412 AMAQI
1st Sep 2025411 AMAQI
1st Sep 2025432 AMAQI
1st Sep 2025423 AMAQI
1st Sep 2025384 AMAQI
1st Sep 2025425 AMAQI

26°C24/30°C

1st Sep 2025486 AMAQI
1st Sep 2025477 AMAQI
1st Sep 2025208 AMAQI
1st Sep 2025199 AMAQI
1st Sep 20252210 AMAQI
1st Sep 20252211 AMAQI
1st Sep 20252012 PMAQI
1st Sep 2025381 PMAQI
1st Sep 2025262 PMAQI
1st Sep 2025223 PMAQI
1st Sep 2025254 PMAQI
1st Sep 2025235 PMAQI
1st Sep 2025266 PMAQI
1st Sep 2025397 PMAQI
1st Sep 2025368 PMAQI
1st Sep 2025359 PMAQI
1st Sep 20253810 PMAQI
1st Sep 20253811 PMAQI
2nd Sep 20253812 AMAQI
2nd Sep 2025421 AMAQI
2nd Sep 2025422 AMAQI
2nd Sep 2025433 AMAQI
2nd Sep 2025404 AMAQI
2nd Sep 2025395 AMAQI

26°C24/30°C

2nd Sep 2025416 AMAQI
2nd Sep 2025447 AMAQI
2nd Sep 2025298 AMAQI
2nd Sep 2025509 AMAQI
2nd Sep 20253210 AMAQI
2nd Sep 20251911 AMAQI
2nd Sep 20252012 PMAQI
2nd Sep 2025301 PMAQI
2nd Sep 2025332 PMAQI
2nd Sep 2025223 PMAQI
2nd Sep 2025264 PMAQI
2nd Sep 2025225 PMAQI
2nd Sep 2025326 PMAQI
2nd Sep 2025297 PMAQI
2nd Sep 2025428 PMAQI
2nd Sep 2025369 PMAQI
2nd Sep 20253910 PMAQI
2nd Sep 20253811 PMAQI
3rd Sep 20254412 AMAQI
3rd Sep 2025371 AMAQI
3rd Sep 2025492 AMAQI
3rd Sep 2025443 AMAQI
3rd Sep 2025444 AMAQI
3rd Sep 2025405 AMAQI

27°C24/32°C

3rd Sep 2025396 AMAQI
3rd Sep 2025387 AMAQI
3rd Sep 2025308 AMAQI
3rd Sep 2025289 AMAQI
3rd Sep 20252210 AMAQI
3rd Sep 20252811 AMAQI
3rd Sep 20253112 PMAQI
3rd Sep 2025321 PMAQI
3rd Sep 2025382 PMAQI
3rd Sep 2025313 PMAQI
3rd Sep 2025354 PMAQI
3rd Sep 2025225 PMAQI
3rd Sep 2025256 PMAQI
3rd Sep 2025347 PMAQI
3rd Sep 2025418 PMAQI
3rd Sep 2025499 PMAQI
3rd Sep 20254310 PMAQI
3rd Sep 20254211 PMAQI
4th Sep 20253912 AMAQI
4th Sep 2025441 AMAQI
4th Sep 2025422 AMAQI
4th Sep 2025423 AMAQI
4th Sep 2025404 AMAQI
4th Sep 2025415 AMAQI

27°C24/33°C

4th Sep 2025396 AMAQI
4th Sep 2025387 AMAQI
4th Sep 2025298 AMAQI
4th Sep 2025329 AMAQI
4th Sep 20253210 AMAQI
4th Sep 20254811 AMAQI
4th Sep 20253012 PMAQI
4th Sep 2025341 PMAQI
4th Sep 2025262 PMAQI
4th Sep 2025233 PMAQI
4th Sep 2025214 PMAQI
4th Sep 2025215 PMAQI
4th Sep 2025216 PMAQI
4th Sep 2025187 PMAQI
4th Sep 2025158 PMAQI
4th Sep 2025179 PMAQI
4th Sep 20252210 PMAQI
4th Sep 20252311 PMAQI
5th Sep 20253512 AMAQI
5th Sep 2025381 AMAQI
5th Sep 2025362 AMAQI
5th Sep 2025373 AMAQI
5th Sep 2025374 AMAQI
5th Sep 2025425 AMAQI

27°C24/31°C

5th Sep 2025396 AMAQI
5th Sep 2025397 AMAQI
5th Sep 2025488 AMAQI
5th Sep 2025549 AMAQI
5th Sep 20253610 AMAQI
5th Sep 20252411 AMAQI
5th Sep 20252612 PMAQI
5th Sep 2025291 PMAQI
5th Sep 2025282 PMAQI
5th Sep 2025263 PMAQI
5th Sep 2025244 PMAQI
5th Sep 2025295 PMAQI
5th Sep 2025286 PMAQI
5th Sep 2025297 PMAQI
5th Sep 2025328 PMAQI
5th Sep 2025339 PMAQI
5th Sep 20253210 PMAQI
5th Sep 20253011 PMAQI
6th Sep 20253012 AMAQI
6th Sep 2025361 AMAQI
6th Sep 2025342 AMAQI
6th Sep 2025343 AMAQI
6th Sep 2025354 AMAQI
6th Sep 2025365 AMAQI

27°C24/31°C

6th Sep 2025366 AMAQI
6th Sep 2025357 AMAQI
6th Sep 2025228 AMAQI
6th Sep 2025429 AMAQI
6th Sep 20252310 AMAQI
6th Sep 20252611 AMAQI
6th Sep 20252212 PMAQI
6th Sep 2025191 PMAQI
6th Sep 2025202 PMAQI
6th Sep 2025243 PMAQI
6th Sep 2025284 PMAQI
6th Sep 2025215 PMAQI
6th Sep 2025226 PMAQI
6th Sep 2025247 PMAQI
6th Sep 2025268 PMAQI
6th Sep 2025359 PMAQI
6th Sep 20253210 PMAQI
6th Sep 20254011 PMAQI
7th Sep 20253612 AMAQI
7th Sep 2025341 AMAQI
7th Sep 2025352 AMAQI
7th Sep 2025353 AMAQI
7th Sep 2025324 AMAQI
7th Sep 2025315 AMAQI

27°C24/33°C

7th Sep 2025326 AMAQI
7th Sep 2025337 AMAQI
7th Sep 2025448 AMAQI
7th Sep 2025489 AMAQI
7th Sep 20254710 AMAQI
7th Sep 20254811 AMAQI
7th Sep 20253712 PMAQI
7th Sep 2025491 PMAQI
7th Sep 2025552 PMAQI
7th Sep 2025523 PMAQI
7th Sep 2025504 PMAQI
7th Sep 2025425 PMAQI
7th Sep 2025536 PMAQI
7th Sep 2025477 PMAQI
7th Sep 2025498 PMAQI
7th Sep 2025469 PMAQI
7th Sep 20254610 PMAQI
7th Sep 20254311 PMAQI
8th Sep 20254212 AMAQI
8th Sep 2025351 AMAQI
8th Sep 2025342 AMAQI
8th Sep 2025383 AMAQI
8th Sep 2025394 AMAQI
8th Sep 2025385 AMAQI

27°C24/30°C

8th Sep 2025396 AMAQI
8th Sep 2025397 AMAQI
8th Sep 2025438 AMAQI
8th Sep 2025399 AMAQI
8th Sep 20253610 AMAQI
8th Sep 20253711 AMAQI
8th Sep 20253512 PMAQI
8th Sep 2025351 PMAQI
8th Sep 2025342 PMAQI
8th Sep 2025323 PMAQI
8th Sep 2025354 PMAQI
8th Sep 2025315 PMAQI
8th Sep 2025396 PMAQI
8th Sep 2025427 PMAQI
8th Sep 2025518 PMAQI
8th Sep 2025519 PMAQI
8th Sep 20255010 PMAQI
8th Sep 20254611 PMAQI
9th Sep 20254412 AMAQI
9th Sep 2025391 AMAQI
9th Sep 2025382 AMAQI
9th Sep 2025373 AMAQI
9th Sep 2025404 AMAQI
9th Sep 2025395 AMAQI

26°C24/30°C

9th Sep 2025386 AMAQI
9th Sep 2025387 AMAQI
9th Sep 2025268 AMAQI
9th Sep 2025269 AMAQI
9th Sep 20253210 AMAQI
9th Sep 20253211 AMAQI
9th Sep 20252812 PMAQI
9th Sep 2025321 PMAQI
9th Sep 2025272 PMAQI
9th Sep 2025283 PMAQI
9th Sep 2025224 PMAQI
9th Sep 2025265 PMAQI
9th Sep 2025286 PMAQI
9th Sep 2025387 PMAQI
9th Sep 2025358 PMAQI
9th Sep 2025349 PMAQI
9th Sep 20253410 PMAQI
9th Sep 20253411 PMAQI
10th Sep 20253712 AMAQI
10th Sep 2025401 AMAQI
10th Sep 2025412 AMAQI
10th Sep 2025393 AMAQI
10th Sep 2025374 AMAQI
10th Sep 2025365 AMAQI

27°C24/33°C

10th Sep 2025386 AMAQI
10th Sep 2025387 AMAQI
10th Sep 2025268 AMAQI
10th Sep 2025239 AMAQI
10th Sep 20253010 AMAQI
10th Sep 20253211 AMAQI
10th Sep 20252812 PMAQI
10th Sep 2025371 PMAQI
10th Sep 2025372 PMAQI
10th Sep 2025263 PMAQI
10th Sep 2025274 PMAQI
10th Sep 2025235 PMAQI
10th Sep 2025226 PMAQI
10th Sep 2025287 PMAQI
10th Sep 2025338 PMAQI
10th Sep 2025349 PMAQI
10th Sep 20253210 PMAQI
10th Sep 20253211 PMAQI
11th Sep 20253712 AMAQI
11th Sep 2025381 AMAQI
11th Sep 2025392 AMAQI
11th Sep 2025393 AMAQI
11th Sep 2025384 AMAQI
11th Sep 2025375 AMAQI

26°C24/29°C

11th Sep 2025366 AMAQI
11th Sep 2025367 AMAQI
11th Sep 2025228 AMAQI
11th Sep 2025279 AMAQI
11th Sep 20252610 AMAQI
11th Sep 20253411 AMAQI
11th Sep 20252312 PMAQI
11th Sep 2025271 PMAQI
11th Sep 2025302 PMAQI
11th Sep 2025323 PMAQI
11th Sep 2025324 PMAQI
11th Sep 2025275 PMAQI
11th Sep 2025266 PMAQI
11th Sep 2025307 PMAQI
11th Sep 2025308 PMAQI
11th Sep 2025339 PMAQI
11th Sep 20253210 PMAQI
11th Sep 20253111 PMAQI
12th Sep 20253212 AMAQI
12th Sep 2025371 AMAQI
12th Sep 2025392 AMAQI
12th Sep 2025373 AMAQI
12th Sep 2025354 AMAQI
12th Sep 2025365 AMAQI

27°C23/33°C

12th Sep 2025376 AMAQI
12th Sep 2025417 AMAQI
12th Sep 2025368 AMAQI
12th Sep 2025339 AMAQI
12th Sep 20252410 AMAQI
12th Sep 20252611 AMAQI
12th Sep 20252612 PMAQI
12th Sep 2025241 PMAQI
12th Sep 2025232 PMAQI
12th Sep 2025193 PMAQI
12th Sep 2025214 PMAQI
12th Sep 2025225 PMAQI
12th Sep 2025316 PMAQI
12th Sep 2025327 PMAQI
12th Sep 2025398 PMAQI
12th Sep 2025449 PMAQI
12th Sep 20253310 PMAQI
12th Sep 20253411 PMAQI
13th Sep 20253512 AMAQI
13th Sep 2025391 AMAQI
13th Sep 2025362 AMAQI
13th Sep 2025363 AMAQI
13th Sep 2025354 AMAQI
13th Sep 2025355 AMAQI

27°C23/32°C

13th Sep 2025346 AMAQI
13th Sep 2025347 AMAQI
13th Sep 2025408 AMAQI
13th Sep 2025279 AMAQI
13th Sep 20252910 AMAQI
13th Sep 20252811 AMAQI
13th Sep 20253212 PMAQI
13th Sep 2025301 PMAQI
13th Sep 2025282 PMAQI
13th Sep 2025283 PMAQI
13th Sep 2025224 PMAQI
13th Sep 2025235 PMAQI
13th Sep 2025206 PMAQI
13th Sep 2025367 PMAQI
13th Sep 2025378 PMAQI
13th Sep 2025349 PMAQI
13th Sep 20253410 PMAQI
13th Sep 20253211 PMAQI
14th Sep 20253012 AMAQI
14th Sep 2025361 AMAQI
14th Sep 2025362 AMAQI
14th Sep 2025343 AMAQI
14th Sep 2025354 AMAQI
14th Sep 2025345 AMAQI

26°C24/30°C

14th Sep 2025356 AMAQI
14th Sep 2025367 AMAQI
14th Sep 2025268 AMAQI
14th Sep 2025199 AMAQI
14th Sep 20252210 AMAQI
14th Sep 20252611 AMAQI
14th Sep 20252212 PMAQI
14th Sep 2025201 PMAQI
14th Sep 2025292 PMAQI
14th Sep 2025223 PMAQI
14th Sep 2025244 PMAQI
14th Sep 2025255 PMAQI
14th Sep 2025226 PMAQI
14th Sep 2025267 PMAQI
14th Sep 2025298 PMAQI
14th Sep 2025359 PMAQI
14th Sep 20253210 PMAQI
14th Sep 20253011 PMAQI
15th Sep 20253012 AMAQI
15th Sep 2025341 AMAQI
15th Sep 2025352 AMAQI
15th Sep 2025323 AMAQI
15th Sep 2025314 AMAQI
15th Sep 2025325 AMAQI

27°C24/32°C

15th Sep 2025326 AMAQI
15th Sep 2025327 AMAQI
15th Sep 2025348 AMAQI
15th Sep 2025389 AMAQI
15th Sep 20252710 AMAQI
15th Sep 20252711 AMAQI
15th Sep 20252412 PMAQI
15th Sep 2025251 PMAQI
15th Sep 2025242 PMAQI
15th Sep 2025233 PMAQI
15th Sep 2025214 PMAQI
15th Sep 2025185 PMAQI
15th Sep 2025146 PMAQI
15th Sep 2025347 PMAQI
15th Sep 2025308 PMAQI
15th Sep 2025349 PMAQI
15th Sep 20253210 PMAQI
15th Sep 20252911 PMAQI
16th Sep 20253112 AMAQI
16th Sep 2025331 AMAQI
16th Sep 2025342 AMAQI
16th Sep 2025323 AMAQI
16th Sep 2025324 AMAQI
16th Sep 2025335 AMAQI

26°C23/32°C

16th Sep 2025336 AMAQI
16th Sep 2025327 AMAQI
16th Sep 2025258 AMAQI
16th Sep 2025299 AMAQI
16th Sep 20252810 AMAQI
16th Sep 20252811 AMAQI
16th Sep 20252312 PMAQI
16th Sep 2025271 PMAQI
16th Sep 2025222 PMAQI
16th Sep 2025183 PMAQI
16th Sep 2025184 PMAQI
16th Sep 2025165 PMAQI
16th Sep 2025186 PMAQI
16th Sep 2025237 PMAQI
16th Sep 2025268 PMAQI
16th Sep 2025289 PMAQI
16th Sep 20253010 PMAQI
16th Sep 20252711 PMAQI
17th Sep 20252812 AMAQI
17th Sep 2025331 AMAQI
17th Sep 2025332 AMAQI
17th Sep 2025323 AMAQI
17th Sep 2025324 AMAQI
17th Sep 2025325 AMAQI

26°C24/30°C

17th Sep 2025326 AMAQI
17th Sep 2025327 AMAQI
17th Sep 2025258 AMAQI
17th Sep 2025249 AMAQI
17th Sep 20252610 AMAQI
17th Sep 20252111 AMAQI
17th Sep 20252412 PMAQI
17th Sep 2025201 PMAQI
17th Sep 2025212 PMAQI
17th Sep 2025263 PMAQI
17th Sep 2025184 PMAQI
17th Sep 2025225 PMAQI
17th Sep 2025226 PMAQI
17th Sep 2025287 PMAQI
17th Sep 2025288 PMAQI
17th Sep 2025269 PMAQI
17th Sep 20252710 PMAQI
17th Sep 20252611 PMAQI
18th Sep 20252712 AMAQI
18th Sep 2025321 AMAQI
18th Sep 2025332 AMAQI
18th Sep 2025333 AMAQI
18th Sep 2025314 AMAQI
18th Sep 2025325 AMAQI

26°C24/30°C

18th Sep 2025316 AMAQI
18th Sep 2025307 AMAQI
18th Sep 2025268 AMAQI
18th Sep 2025349 AMAQI
18th Sep 20253810 AMAQI
18th Sep 20254711 AMAQI
18th Sep 20253612 PMAQI
18th Sep 2025211 PMAQI
18th Sep 2025202 PMAQI
18th Sep 2025253 PMAQI
18th Sep 2025204 PMAQI
18th Sep 2025205 PMAQI
18th Sep 2025256 PMAQI
18th Sep 2025277 PMAQI
18th Sep 2025338 PMAQI
18th Sep 2025339 PMAQI
18th Sep 20253410 PMAQI
18th Sep 20252811 PMAQI
19th Sep 20252712 AMAQI
19th Sep 2025281 AMAQI
19th Sep 2025322 AMAQI
19th Sep 2025323 AMAQI
19th Sep 2025324 AMAQI
19th Sep 2025315 AMAQI

26°C24/29°C

19th Sep 2025316 AMAQI
19th Sep 2025327 AMAQI
19th Sep 2025198 AMAQI
19th Sep 2025199 AMAQI
19th Sep 20252010 AMAQI
19th Sep 20251911 AMAQI
19th Sep 20252812 PMAQI
19th Sep 2025301 PMAQI
19th Sep 2025262 PMAQI
19th Sep 2025243 PMAQI
19th Sep 2025214 PMAQI
19th Sep 2025155 PMAQI
19th Sep 2025186 PMAQI
19th Sep 2025247 PMAQI
19th Sep 2025268 PMAQI
19th Sep 2025279 PMAQI
19th Sep 20252710 PMAQI
19th Sep 20253211 PMAQI
20th Sep 20253512 AMAQI
20th Sep 2025321 AMAQI
20th Sep 2025322 AMAQI
20th Sep 2025323 AMAQI
20th Sep 2025324 AMAQI
20th Sep 2025335 AMAQI

27°C24/32°C

20th Sep 2025336 AMAQI
20th Sep 2025327 AMAQI
20th Sep 2025398 AMAQI
20th Sep 2025419 AMAQI
20th Sep 20254310 AMAQI
20th Sep 20254011 AMAQI
20th Sep 20254212 PMAQI
20th Sep 2025411 PMAQI
20th Sep 2025342 PMAQI
20th Sep 2025343 PMAQI
20th Sep 2025314 PMAQI
20th Sep 2025315 PMAQI
20th Sep 2025346 PMAQI
20th Sep 2025397 PMAQI
20th Sep 2025338 PMAQI
20th Sep 2025369 PMAQI
20th Sep 20254010 PMAQI
20th Sep 20254311 PMAQI
21st Sep 20253612 AMAQI
21st Sep 2025331 AMAQI
21st Sep 2025332 AMAQI
21st Sep 2025343 AMAQI
21st Sep 2025344 AMAQI
21st Sep 2025345 AMAQI

27°C24/32°C

21st Sep 2025346 AMAQI
21st Sep 2025337 AMAQI
21st Sep 2025388 AMAQI
21st Sep 2025479 AMAQI
21st Sep 20254410 AMAQI
21st Sep 20254111 AMAQI
21st Sep 20254312 PMAQI
21st Sep 2025511 PMAQI
21st Sep 2025522 PMAQI
21st Sep 2025523 PMAQI
21st Sep 2025534 PMAQI
21st Sep 2025525 PMAQI
21st Sep 2025456 PMAQI
21st Sep 2025417 PMAQI
21st Sep 2025408 PMAQI
21st Sep 2025429 PMAQI
21st Sep 20253810 PMAQI
21st Sep 20253611 PMAQI
22nd Sep 20253412 AMAQI
22nd Sep 2025341 AMAQI
22nd Sep 2025352 AMAQI
22nd Sep 2025363 AMAQI
22nd Sep 2025374 AMAQI
22nd Sep 2025375 AMAQI

27°C24/31°C

22nd Sep 2025376 AMAQI
22nd Sep 2025367 AMAQI
22nd Sep 2025288 AMAQI
22nd Sep 2025309 AMAQI
22nd Sep 20252510 AMAQI
22nd Sep 20252411 AMAQI
22nd Sep 20252412 PMAQI
22nd Sep 2025271 PMAQI
22nd Sep 2025272 PMAQI
22nd Sep 2025333 PMAQI
22nd Sep 2025494 PMAQI
22nd Sep 2025325 PMAQI
22nd Sep 2025276 PMAQI
22nd Sep 2025307 PMAQI
22nd Sep 2025338 PMAQI
22nd Sep 2025349 PMAQI
22nd Sep 20253010 PMAQI
22nd Sep 20253011 PMAQI
23rd Sep 20253012 AMAQI
23rd Sep 2025361 AMAQI
23rd Sep 2025362 AMAQI
23rd Sep 2025353 AMAQI
23rd Sep 2025334 AMAQI
23rd Sep 2025345 AMAQI

26°C24/30°C

23rd Sep 2025336 AMAQI
23rd Sep 2025347 AMAQI
23rd Sep 2025308 AMAQI
23rd Sep 2025369 AMAQI
23rd Sep 20253410 AMAQI
23rd Sep 20253011 AMAQI
23rd Sep 20254212 PMAQI
23rd Sep 2025531 PMAQI
23rd Sep 2025462 PMAQI
23rd Sep 2025493 PMAQI
23rd Sep 2025444 PMAQI
23rd Sep 2025415 PMAQI
23rd Sep 2025506 PMAQI
23rd Sep 2025467 PMAQI
23rd Sep 2025438 PMAQI
23rd Sep 2025449 PMAQI
23rd Sep 20254310 PMAQI
23rd Sep 20255011 PMAQI
24th Sep 20255212 AMAQI
24th Sep 2025381 AMAQI
24th Sep 2025342 AMAQI
24th Sep 2025353 AMAQI
24th Sep 2025364 AMAQI
24th Sep 2025355 AMAQI

27°C24/31°C

24th Sep 2025366 AMAQI
6 AM
24th Sep 2025357 AMAQI
12 PM
6 PM
12 AM
5 AM

--°C/°C

Day time
Avg. Highest Time
6 AM - 7 AM

37AQI

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

27AQI

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. 37), while the lowest AQI was between 5 PM to 5 PM (Avg. 27).
Night time
Avg. Highest Time
1 AM - 5 AM

37AQI

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. 37), while the lowest AQI was between 7 PM to 7 PM (Avg. 33).

2025 Days Vs Air Quality

Environmental Resources Monitoring Unit, Haikou, Hainan, China

2025

52%

139

44%

117

4%

10

Total number of days with different AQI categories in last 267 days in 2025 (98 days remaining)

Good
139 Days
Moderate
117 Days
Poor
10 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 52%

Health Risk Level:

Considerable

In 2025, 52% of 267 days were within WHO’s safe air quality limits, and 48% exceeded them. The risk of health issues is Considerable, with potential for conditions in sensitive individuals.

Annual Air Quality Insights

Environmental Resources Monitoring Unit, Haikou, 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
121AQI
2nd January 2025
101AQI
3rd January 2025
107AQI
4th January 2025
90AQI
5th January 2025
107AQI
6th January 2025
115AQI
7th January 2025
90AQI
8th January 2025
91AQI
9th January 2025
114AQI
10th January 2025
108AQI
11th January 2025
93AQI
12th January 2025
82AQI
13th January 2025
78AQI
14th January 2025
73AQI
15th January 2025
88AQI
16th January 2025
96AQI
17th January 2025
91AQI
18th January 2025
86AQI
19th January 2025
92AQI
20th January 2025
96AQI
21st January 2025
84AQI
22nd January 2025
90AQI
23rd January 2025
80AQI
24th January 2025
61AQI
25th January 2025
60AQI
26th January 2025
60AQI
27th January 2025
59AQI
28th January 2025
65AQI
29th January 2025
91AQI
30th January 2025
69AQI
31st January 2025
62AQI
1st February 2025
52AQI
2nd February 2025
47AQI
3rd February 2025
59AQI
4th February 2025
52AQI
5th February 2025
57AQI
6th February 2025
58AQI
7th February 2025
70AQI
8th February 2025
60AQI
9th February 2025
68AQI
10th February 2025
60AQI
11th February 2025
56AQI
12th February 2025
52AQI
13th February 2025
63AQI
14th February 2025
46AQI
15th February 2025
65AQI
16th February 2025
44AQI
17th February 2025
65AQI
18th February 2025
76AQI
19th February 2025
71AQI
20th February 2025
64AQI
21st February 2025
60AQI
22nd February 2025
45AQI
23rd February 2025
54AQI
24th February 2025
49AQI
25th February 2025
56AQI
26th February 2025
68AQI
27th February 2025
63AQI
28th February 2025
56AQI
1st March 2025
55AQI
2nd March 2025
56AQI
3rd March 2025
60AQI
4th March 2025
49AQI
5th March 2025
44AQI
6th March 2025
30AQI
7th March 2025
42AQI
8th March 2025
40AQI
9th March 2025
61AQI
10th March 2025
61AQI
11th March 2025
59AQI
12th March 2025
48AQI
13th March 2025
46AQI
14th March 2025
38AQI
15th March 2025
53AQI
16th March 2025
46AQI
17th March 2025
66AQI
18th March 2025
69AQI
19th March 2025
86AQI
20th March 2025
77AQI
21st March 2025
84AQI
22nd March 2025
76AQI
23rd March 2025
75AQI
24th March 2025
71AQI
25th March 2025
74AQI
26th March 2025
66AQI
27th March 2025
67AQI
28th March 2025
60AQI
29th March 2025
48AQI
30th March 2025
31AQI
31st March 2025
34AQI
1st April 2025
36AQI
2nd April 2025
62AQI
3rd April 2025
55AQI
4th April 2025
58AQI
5th April 2025
59AQI
6th April 2025
47AQI
7th April 2025
61AQI
8th April 2025
56AQI
9th April 2025
62AQI
10th April 2025
62AQI
11th April 2025
61AQI
12th April 2025
62AQI
13th April 2025
131AQI
14th April 2025
131AQI
15th April 2025
122AQI
16th April 2025
98AQI
17th April 2025
90AQI
18th April 2025
75AQI
19th April 2025
61AQI
20th April 2025
60AQI
21st April 2025
58AQI
22nd April 2025
63AQI
23rd April 2025
54AQI
24th April 2025
60AQI
25th April 2025
54AQI
26th April 2025
51AQI
27th April 2025
47AQI
28th April 2025
54AQI
29th April 2025
54AQI
30th April 2025
53AQI
1st May 2025
53AQI
2nd May 2025
59AQI
3rd May 2025
59AQI
4th May 2025
58AQI
5th May 2025
52AQI
6th May 2025
58AQI
7th May 2025
58AQI
8th May 2025
53AQI
9th May 2025
54AQI
10th May 2025
47AQI
11th May 2025
53AQI
12th May 2025
61AQI
13th May 2025
57AQI
14th May 2025
45AQI
15th May 2025
37AQI
16th May 2025
36AQI
17th May 2025
38AQI
18th May 2025
39AQI
19th May 2025
38AQI
20th May 2025
42AQI
21st May 2025
48AQI
22nd May 2025
38AQI
23rd May 2025
35AQI
24th May 2025
35AQI
25th May 2025
50AQI
26th May 2025
71AQI
27th May 2025
54AQI
28th May 2025
52AQI
29th May 2025
50AQI
30th May 2025
50AQI
31st May 2025
40AQI
1st June 2025
46AQI
2nd June 2025
43AQI
3rd June 2025
51AQI
4th June 2025
55AQI
5th June 2025
43AQI
6th June 2025
42AQI
7th June 2025
49AQI
8th June 2025
50AQI
9th June 2025
53AQI
10th June 2025
54AQI
11th June 2025
43AQI
12th June 2025
31AQI
13th June 2025
34AQI
14th June 2025
34AQI
15th June 2025
36AQI
16th June 2025
39AQI
17th June 2025
43AQI
18th June 2025
39AQI
19th June 2025
38AQI
20th June 2025
35AQI
21st June 2025
33AQI
22nd June 2025
37AQI
23rd June 2025
33AQI
24th June 2025
29AQI
25th June 2025
32AQI
26th June 2025
27AQI
27th June 2025
27AQI
28th June 2025
28AQI
29th June 2025
29AQI
30th June 2025
28AQI
1st July 2025
28AQI
2nd July 2025
28AQI
3rd July 2025
27AQI
4th July 2025
29AQI
5th July 2025
31AQI
6th July 2025
36AQI
7th July 2025
34AQI
8th July 2025
39AQI
9th July 2025
41AQI
10th July 2025
45AQI
11th July 2025
47AQI
12th July 2025
46AQI
13th July 2025
47AQI
14th July 2025
48AQI
15th July 2025
52AQI
16th July 2025
51AQI
17th July 2025
48AQI
18th July 2025
49AQI
19th July 2025
43AQI
20th July 2025
36AQI
21st July 2025
33AQI
22nd July 2025
34AQI
23rd July 2025
34AQI
24th July 2025
35AQI
25th July 2025
39AQI
26th July 2025
37AQI
27th July 2025
39AQI
28th July 2025
36AQI
29th July 2025
37AQI
30th July 2025
37AQI
31st July 2025
46AQI
1st August 2025
53AQI
2nd August 2025
50AQI
3rd August 2025
54AQI
4th August 2025
56AQI
5th August 2025
55AQI
6th August 2025
56AQI
7th August 2025
54AQI
8th August 2025
50AQI
9th August 2025
49AQI
10th August 2025
46AQI
11th August 2025
44AQI
12th August 2025
44AQI
13th August 2025
43AQI
14th August 2025
39AQI
15th August 2025
35AQI
16th August 2025
31AQI
17th August 2025
31AQI
18th August 2025
28AQI
19th August 2025
33AQI
20th August 2025
37AQI
21st August 2025
34AQI
22nd August 2025
36AQI
23rd August 2025
36AQI
24th August 2025
36AQI
25th August 2025
32AQI
26th August 2025
34AQI
27th August 2025
37AQI
28th August 2025
39AQI
29th August 2025
40AQI
30th August 2025
34AQI
31st August 2025
34AQI
1st September 2025
34AQI
2nd September 2025
35AQI
3rd September 2025
37AQI
4th September 2025
29AQI
5th September 2025
34AQI
6th September 2025
30AQI
7th September 2025
42AQI
8th September 2025
40AQI
9th September 2025
34AQI
10th September 2025
33AQI
11th September 2025
32AQI
12th September 2025
32AQI
13th September 2025
32AQI
14th September 2025
29AQI
15th September 2025
29AQI
16th September 2025
27AQI
17th September 2025
27AQI
18th September 2025
30AQI
19th September 2025
26AQI
20th September 2025
36AQI
21st September 2025
40AQI
22nd September 2025
32AQI
23rd September 2025
34AQI
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

87AQI

58AQI

57AQI

67AQI

49AQI

39AQI

39AQI

41AQI

33AQI

No. of days

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

202553AQI

24
7
5
23
12
19
3
24
3
16
15
26
4
29
2
25
6
23
139
117
10

Highest AQI recorded in

January

87AQI

Lowest AQI recorded in

September

33AQI

202452AQI

12
9
11
4
2
5
17
5
13
17
6
28
2
31
31
22
7
12
13
5
1
4
26
26
5
178
123
12
1

Highest AQI recorded in

December

83AQI

Lowest AQI recorded in

July

30AQI

202361AQI

2
8
1
1
10
2
2
2
1
5
1
1
9
2
3
3
7
21
2
30
49
4

Highest AQI recorded in

November

81AQI

Lowest AQI recorded in

July

17AQI

202248AQI

10
18
1
14
7
14
17
14
16
25
6
28
2
18
2
2
7
11
13
1
19
4
2
10
1
159
100
3

Highest AQI recorded in

December

68AQI

Lowest AQI recorded in

June

34AQI

202153AQI

1
19
10
1
7
21
14
16
1
20
10
27
4
18
12
29
2
29
2
23
5
1
1
20
8
9
17
1
2
25
4
199
141
17
2

Highest AQI recorded in

January

94AQI

Lowest AQI recorded in

August

36AQI

202052AQI

8
2
8
5
12
5
26
2
29
1
25
6
23
7
9
21
1
4
20
6
2
16
12
1
146
85
19
1

Highest AQI recorded in

December

94AQI

Lowest AQI recorded in

July

28AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2023(Avg.)
61AQI
Least Polluted Year Recorded
2022(Avg.)
48AQI

Environmental Resources Monitoring Unit's annual 2025 AQI (53) shows an average percentage change of -0.5% (improved AQI) compared to previous years: 2020 (52), 2021 (53), 2022 (48), 2023 (61), 2024 (52).