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+
August 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
20th Aug 2021
72AQILowest AQI recorded on
26th Aug 2021
19AQISame Day Analysis (3rd 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: 3rd Aug - 4th Aug 2025
Environmental Resources Monitoring Unit, Haikou, Hainan, China
AQI
Day
Night
.
6 AM3rd Aug 2025
7 PM
5 AM4th Aug 2025
Day time
Avg. Highest Time
12AMNaNth undefined
AQI
Avg. Lowest Time
12AMNaNth undefined
AQI
Night time
Avg. Highest Time
12PM3rd Aug
65AQI
Avg. Lowest Time
6PM3rd Aug
44AQI
In the last 24 hours,
Environmental Resources Monitoring Unit's AQI reached its highest point of 65 at 12 PM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 3rd Aug and 4th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Environmental Resources Monitoring Unit, Haikou, Hainan, China
JulAug
05th - 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 - 04th04th
Day
Night
5th Jul 2025326 AMAQI
5th Jul 2025307 AMAQI
5th Jul 2025308 AMAQI
5th Jul 2025369 AMAQI
5th Jul 20253910 AMAQI
5th Jul 20252811 AMAQI
5th Jul 20252812 PMAQI
5th Jul 2025261 PMAQI
5th Jul 2025262 PMAQI
5th Jul 2025293 PMAQI
5th Jul 2025304 PMAQI
5th Jul 2025295 PMAQI
5th Jul 2025346 PMAQI
5th Jul 2025327 PMAQI
5th Jul 2025318 PMAQI
5th Jul 2025329 PMAQI
5th Jul 20253210 PMAQI
5th Jul 20253411 PMAQI
6th Jul 20253412 AMAQI
6th Jul 2025341 AMAQI
6th Jul 2025332 AMAQI
6th Jul 2025323 AMAQI
6th Jul 2025324 AMAQI
6th Jul 2025335 AMAQI
27°C24/33°C
6th Jul 2025336 AMAQI
6th Jul 2025347 AMAQI
6th Jul 2025358 AMAQI
6th Jul 2025389 AMAQI
6th Jul 20253610 AMAQI
6th Jul 20253811 AMAQI
6th Jul 20254612 PMAQI
6th Jul 2025391 PMAQI
6th Jul 2025322 PMAQI
6th Jul 2025383 PMAQI
6th Jul 2025394 PMAQI
6th Jul 2025415 PMAQI
6th Jul 2025446 PMAQI
6th Jul 2025347 PMAQI
6th Jul 2025318 PMAQI
6th Jul 2025369 PMAQI
6th Jul 20253610 PMAQI
6th Jul 20253611 PMAQI
7th Jul 20253612 AMAQI
7th Jul 2025351 AMAQI
7th Jul 2025372 AMAQI
7th Jul 2025373 AMAQI
7th Jul 2025364 AMAQI
7th Jul 2025355 AMAQI
27°C24/33°C
7th Jul 2025366 AMAQI
7th Jul 2025377 AMAQI
7th Jul 2025328 AMAQI
7th Jul 2025349 AMAQI
7th Jul 20253310 AMAQI
7th Jul 20253011 AMAQI
7th Jul 20253012 PMAQI
7th Jul 2025261 PMAQI
7th Jul 2025302 PMAQI
7th Jul 2025293 PMAQI
7th Jul 2025264 PMAQI
7th Jul 2025295 PMAQI
7th Jul 2025306 PMAQI
7th Jul 2025377 PMAQI
7th Jul 2025338 PMAQI
7th Jul 2025369 PMAQI
7th Jul 20253810 PMAQI
7th Jul 20253611 PMAQI
8th Jul 20253612 AMAQI
8th Jul 2025351 AMAQI
8th Jul 2025362 AMAQI
8th Jul 2025363 AMAQI
8th Jul 2025364 AMAQI
8th Jul 2025375 AMAQI
27°C24/31°C
8th Jul 2025376 AMAQI
8th Jul 2025377 AMAQI
8th Jul 2025408 AMAQI
8th Jul 2025459 AMAQI
8th Jul 20255210 AMAQI
8th Jul 20254911 AMAQI
8th Jul 20254612 PMAQI
8th Jul 2025391 PMAQI
8th Jul 2025382 PMAQI
8th Jul 2025383 PMAQI
8th Jul 2025364 PMAQI
8th Jul 2025385 PMAQI
8th Jul 2025406 PMAQI
8th Jul 2025437 PMAQI
8th Jul 2025408 PMAQI
8th Jul 2025409 PMAQI
8th Jul 20253810 PMAQI
8th Jul 20253811 PMAQI
9th Jul 20254012 AMAQI
9th Jul 2025351 AMAQI
9th Jul 2025422 AMAQI
9th Jul 2025403 AMAQI
9th Jul 2025424 AMAQI
9th Jul 2025425 AMAQI
29°C24/34°C
9th Jul 2025396 AMAQI
9th Jul 2025407 AMAQI
9th Jul 2025438 AMAQI
9th Jul 2025489 AMAQI
9th Jul 20254810 AMAQI
9th Jul 20254711 AMAQI
9th Jul 20254212 PMAQI
9th Jul 2025421 PMAQI
9th Jul 2025402 PMAQI
9th Jul 2025403 PMAQI
9th Jul 2025404 PMAQI
9th Jul 2025415 PMAQI
9th Jul 2025406 PMAQI
9th Jul 2025417 PMAQI
9th Jul 2025418 PMAQI
9th Jul 2025449 PMAQI
9th Jul 20254210 PMAQI
9th Jul 20254011 PMAQI
10th Jul 20253912 AMAQI
10th Jul 2025421 AMAQI
10th Jul 2025442 AMAQI
10th Jul 2025443 AMAQI
10th Jul 2025454 AMAQI
10th Jul 2025445 AMAQI
28°C25/33°C
10th Jul 2025436 AMAQI
10th Jul 2025447 AMAQI
10th Jul 2025418 AMAQI
10th Jul 2025469 AMAQI
10th Jul 20254810 AMAQI
10th Jul 20255211 AMAQI
10th Jul 20255212 PMAQI
10th Jul 2025531 PMAQI
10th Jul 2025532 PMAQI
10th Jul 2025493 PMAQI
10th Jul 2025474 PMAQI
10th Jul 2025435 PMAQI
10th Jul 2025406 PMAQI
10th Jul 2025407 PMAQI
10th Jul 2025458 PMAQI
10th Jul 2025469 PMAQI
10th Jul 20254710 PMAQI
10th Jul 20255011 PMAQI
11th Jul 20255012 AMAQI
11th Jul 2025511 AMAQI
11th Jul 2025512 AMAQI
11th Jul 2025513 AMAQI
11th Jul 2025484 AMAQI
11th Jul 2025505 AMAQI
28°C25/33°C
11th Jul 2025506 AMAQI
11th Jul 2025507 AMAQI
11th Jul 2025448 AMAQI
11th Jul 2025429 AMAQI
11th Jul 20254410 AMAQI
11th Jul 20254111 AMAQI
11th Jul 20254212 PMAQI
11th Jul 2025401 PMAQI
11th Jul 2025402 PMAQI
11th Jul 2025453 PMAQI
11th Jul 2025474 PMAQI
11th Jul 2025525 PMAQI
11th Jul 2025516 PMAQI
11th Jul 2025487 PMAQI
11th Jul 2025488 PMAQI
11th Jul 2025429 PMAQI
11th Jul 20254010 PMAQI
11th Jul 20254311 PMAQI
12th Jul 20254312 AMAQI
12th Jul 2025431 AMAQI
12th Jul 2025512 AMAQI
12th Jul 2025523 AMAQI
12th Jul 2025504 AMAQI
12th Jul 2025505 AMAQI
27°C25/30°C
12th Jul 2025496 AMAQI
12th Jul 2025507 AMAQI
12th Jul 2025528 AMAQI
12th Jul 2025539 AMAQI
12th Jul 20255410 AMAQI
12th Jul 20255011 AMAQI
12th Jul 20255212 PMAQI
12th Jul 2025481 PMAQI
12th Jul 2025422 PMAQI
12th Jul 2025353 PMAQI
12th Jul 2025364 PMAQI
12th Jul 2025385 PMAQI
12th Jul 2025416 PMAQI
12th Jul 2025397 PMAQI
12th Jul 2025428 PMAQI
12th Jul 2025429 PMAQI
12th Jul 20254210 PMAQI
12th Jul 20254911 PMAQI
13th Jul 20255212 AMAQI
13th Jul 2025491 AMAQI
13th Jul 2025522 AMAQI
13th Jul 2025513 AMAQI
13th Jul 2025504 AMAQI
13th Jul 2025525 AMAQI
27°C24/31°C
13th Jul 2025506 AMAQI
13th Jul 2025517 AMAQI
13th Jul 2025468 AMAQI
13th Jul 2025429 AMAQI
13th Jul 20254410 AMAQI
13th Jul 20255211 AMAQI
13th Jul 20254712 PMAQI
13th Jul 2025451 PMAQI
13th Jul 2025442 PMAQI
13th Jul 2025453 PMAQI
13th Jul 2025454 PMAQI
13th Jul 2025455 PMAQI
13th Jul 2025456 PMAQI
13th Jul 2025387 PMAQI
13th Jul 2025478 PMAQI
13th Jul 2025439 PMAQI
13th Jul 20254410 PMAQI
13th Jul 20254411 PMAQI
14th Jul 20254512 AMAQI
14th Jul 2025501 AMAQI
14th Jul 2025532 AMAQI
14th Jul 2025533 AMAQI
14th Jul 2025524 AMAQI
14th Jul 2025515 AMAQI
28°C25/33°C
14th Jul 2025526 AMAQI
14th Jul 2025517 AMAQI
14th Jul 2025428 AMAQI
14th Jul 2025389 AMAQI
14th Jul 20254410 AMAQI
14th Jul 20253911 AMAQI
14th Jul 20254312 PMAQI
14th Jul 2025381 PMAQI
14th Jul 2025442 PMAQI
14th Jul 2025443 PMAQI
14th Jul 2025454 PMAQI
14th Jul 2025485 PMAQI
14th Jul 2025466 PMAQI
14th Jul 2025497 PMAQI
14th Jul 2025528 PMAQI
14th Jul 2025509 PMAQI
14th Jul 20254810 PMAQI
14th Jul 20255011 PMAQI
15th Jul 20254812 AMAQI
15th Jul 2025461 AMAQI
15th Jul 2025512 AMAQI
15th Jul 2025543 AMAQI
15th Jul 2025534 AMAQI
15th Jul 2025545 AMAQI
28°C25/33°C
15th Jul 2025546 AMAQI
15th Jul 2025557 AMAQI
15th Jul 2025598 AMAQI
15th Jul 2025639 AMAQI
15th Jul 20256110 AMAQI
15th Jul 20255811 AMAQI
15th Jul 20255212 PMAQI
15th Jul 2025521 PMAQI
15th Jul 2025502 PMAQI
15th Jul 2025503 PMAQI
15th Jul 2025504 PMAQI
15th Jul 2025465 PMAQI
15th Jul 2025466 PMAQI
15th Jul 2025487 PMAQI
15th Jul 2025528 PMAQI
15th Jul 2025529 PMAQI
15th Jul 20255210 PMAQI
15th Jul 20255111 PMAQI
16th Jul 20255012 AMAQI
16th Jul 2025511 AMAQI
16th Jul 2025532 AMAQI
16th Jul 2025533 AMAQI
16th Jul 2025544 AMAQI
16th Jul 2025545 AMAQI
29°C25/34°C
16th Jul 2025546 AMAQI
16th Jul 2025547 AMAQI
16th Jul 2025528 AMAQI
16th Jul 2025509 AMAQI
16th Jul 20255010 AMAQI
16th Jul 20254611 AMAQI
16th Jul 20254412 PMAQI
16th Jul 2025471 PMAQI
16th Jul 2025482 PMAQI
16th Jul 2025503 PMAQI
16th Jul 2025504 PMAQI
16th Jul 2025495 PMAQI
16th Jul 2025506 PMAQI
16th Jul 2025517 PMAQI
16th Jul 2025498 PMAQI
16th Jul 2025539 PMAQI
16th Jul 20255210 PMAQI
16th Jul 20255011 PMAQI
17th Jul 20254912 AMAQI
17th Jul 2025511 AMAQI
17th Jul 2025532 AMAQI
17th Jul 2025533 AMAQI
17th Jul 2025524 AMAQI
17th Jul 2025525 AMAQI
29°C25/35°C
17th Jul 2025526 AMAQI
17th Jul 2025527 AMAQI
17th Jul 2025578 AMAQI
17th Jul 2025599 AMAQI
17th Jul 20256110 AMAQI
17th Jul 20255811 AMAQI
17th Jul 20254712 PMAQI
17th Jul 2025481 PMAQI
17th Jul 2025442 PMAQI
17th Jul 2025443 PMAQI
17th Jul 2025404 PMAQI
17th Jul 2025405 PMAQI
17th Jul 2025296 PMAQI
17th Jul 2025347 PMAQI
17th Jul 2025438 PMAQI
17th Jul 2025449 PMAQI
17th Jul 20254310 PMAQI
17th Jul 20255011 PMAQI
18th Jul 20255212 AMAQI
18th Jul 2025521 AMAQI
18th Jul 2025522 AMAQI
18th Jul 2025523 AMAQI
18th Jul 2025534 AMAQI
18th Jul 2025535 AMAQI
29°C25/34°C
18th Jul 2025526 AMAQI
18th Jul 2025537 AMAQI
18th Jul 2025558 AMAQI
18th Jul 2025579 AMAQI
18th Jul 20255710 AMAQI
18th Jul 20255711 AMAQI
18th Jul 20255012 PMAQI
18th Jul 2025471 PMAQI
18th Jul 2025382 PMAQI
18th Jul 2025383 PMAQI
18th Jul 2025374 PMAQI
18th Jul 2025345 PMAQI
18th Jul 2025346 PMAQI
18th Jul 2025397 PMAQI
18th Jul 2025498 PMAQI
18th Jul 2025499 PMAQI
18th Jul 20255110 PMAQI
18th Jul 20255211 PMAQI
19th Jul 20255612 AMAQI
19th Jul 2025541 AMAQI
19th Jul 2025522 AMAQI
19th Jul 2025533 AMAQI
19th Jul 2025524 AMAQI
19th Jul 2025525 AMAQI
29°C26/33°C
19th Jul 2025526 AMAQI
19th Jul 2025527 AMAQI
19th Jul 2025428 AMAQI
19th Jul 2025419 AMAQI
19th Jul 20253710 AMAQI
19th Jul 20253711 AMAQI
19th Jul 20254912 PMAQI
19th Jul 2025541 PMAQI
19th Jul 2025322 PMAQI
19th Jul 2025243 PMAQI
19th Jul 2025254 PMAQI
19th Jul 2025265 PMAQI
19th Jul 2025266 PMAQI
19th Jul 2025327 PMAQI
19th Jul 2025408 PMAQI
19th Jul 2025429 PMAQI
19th Jul 20254310 PMAQI
19th Jul 20254411 PMAQI
20th Jul 20254212 AMAQI
20th Jul 2025531 AMAQI
20th Jul 2025532 AMAQI
20th Jul 2025533 AMAQI
20th Jul 2025524 AMAQI
20th Jul 2025525 AMAQI
25°C24/26°C
20th Jul 2025526 AMAQI
20th Jul 2025527 AMAQI
20th Jul 2025378 AMAQI
20th Jul 2025229 AMAQI
20th Jul 20252310 AMAQI
20th Jul 20252211 AMAQI
20th Jul 20252412 PMAQI
20th Jul 2025221 PMAQI
20th Jul 2025222 PMAQI
20th Jul 2025213 PMAQI
20th Jul 2025174 PMAQI
20th Jul 2025195 PMAQI
20th Jul 2025216 PMAQI
20th Jul 2025307 PMAQI
20th Jul 2025378 PMAQI
20th Jul 2025389 PMAQI
20th Jul 20253710 PMAQI
20th Jul 20253811 PMAQI
21st Jul 20254212 AMAQI
21st Jul 2025471 AMAQI
21st Jul 2025522 AMAQI
21st Jul 2025503 AMAQI
21st Jul 2025484 AMAQI
21st Jul 2025485 AMAQI
25°C24/27°C
21st Jul 2025476 AMAQI
21st Jul 2025477 AMAQI
21st Jul 2025258 AMAQI
21st Jul 2025189 AMAQI
21st Jul 20251910 AMAQI
21st Jul 20252011 AMAQI
21st Jul 20252212 PMAQI
21st Jul 2025211 PMAQI
21st Jul 2025202 PMAQI
21st Jul 2025183 PMAQI
21st Jul 2025184 PMAQI
21st Jul 2025175 PMAQI
21st Jul 2025166 PMAQI
21st Jul 2025267 PMAQI
21st Jul 2025368 PMAQI
21st Jul 2025369 PMAQI
21st Jul 20253710 PMAQI
21st Jul 20253711 PMAQI
22nd Jul 20253912 AMAQI
22nd Jul 2025451 AMAQI
22nd Jul 2025502 AMAQI
22nd Jul 2025473 AMAQI
22nd Jul 2025444 AMAQI
22nd Jul 2025445 AMAQI
25°C24/26°C
22nd Jul 2025446 AMAQI
22nd Jul 2025437 AMAQI
22nd Jul 2025258 AMAQI
22nd Jul 2025209 AMAQI
22nd Jul 20252310 AMAQI
22nd Jul 20252311 AMAQI
22nd Jul 20252612 PMAQI
22nd Jul 2025251 PMAQI
22nd Jul 2025242 PMAQI
22nd Jul 2025233 PMAQI
22nd Jul 2025224 PMAQI
22nd Jul 2025225 PMAQI
22nd Jul 2025206 PMAQI
22nd Jul 2025267 PMAQI
22nd Jul 2025348 PMAQI
22nd Jul 2025389 PMAQI
22nd Jul 20253910 PMAQI
22nd Jul 20254011 PMAQI
23rd Jul 20254112 AMAQI
23rd Jul 2025441 AMAQI
23rd Jul 2025442 AMAQI
23rd Jul 2025433 AMAQI
23rd Jul 2025414 AMAQI
23rd Jul 2025405 AMAQI
26°C24/31°C
23rd Jul 2025426 AMAQI
23rd Jul 2025417 AMAQI
23rd Jul 2025288 AMAQI
23rd Jul 2025269 AMAQI
23rd Jul 20252810 AMAQI
23rd Jul 20253011 AMAQI
23rd Jul 20252612 PMAQI
23rd Jul 2025281 PMAQI
23rd Jul 2025262 PMAQI
23rd Jul 2025273 PMAQI
23rd Jul 2025274 PMAQI
23rd Jul 2025265 PMAQI
23rd Jul 2025246 PMAQI
23rd Jul 2025277 PMAQI
23rd Jul 2025348 PMAQI
23rd Jul 2025339 PMAQI
23rd Jul 20253510 PMAQI
23rd Jul 20253611 PMAQI
24th Jul 20253612 AMAQI
24th Jul 2025351 AMAQI
24th Jul 2025352 AMAQI
24th Jul 2025363 AMAQI
24th Jul 2025454 AMAQI
24th Jul 2025495 AMAQI
27°C25/32°C
24th Jul 2025496 AMAQI
24th Jul 2025487 AMAQI
24th Jul 2025348 AMAQI
24th Jul 2025329 AMAQI
24th Jul 20253210 AMAQI
24th Jul 20253111 AMAQI
24th Jul 20253212 PMAQI
24th Jul 2025361 PMAQI
24th Jul 2025322 PMAQI
24th Jul 2025313 PMAQI
24th Jul 2025214 PMAQI
24th Jul 2025215 PMAQI
24th Jul 2025246 PMAQI
24th Jul 2025307 PMAQI
24th Jul 2025378 PMAQI
24th Jul 2025349 PMAQI
24th Jul 20253510 PMAQI
24th Jul 20253611 PMAQI
25th Jul 20253612 AMAQI
25th Jul 2025391 AMAQI
25th Jul 2025432 AMAQI
25th Jul 2025413 AMAQI
25th Jul 2025404 AMAQI
25th Jul 2025405 AMAQI
26°C24/29°C
25th Jul 2025406 AMAQI
25th Jul 2025407 AMAQI
25th Jul 2025508 AMAQI
25th Jul 2025549 AMAQI
25th Jul 20254910 AMAQI
25th Jul 20253311 AMAQI
25th Jul 20253112 PMAQI
25th Jul 2025301 PMAQI
25th Jul 2025302 PMAQI
25th Jul 2025303 PMAQI
25th Jul 2025324 PMAQI
25th Jul 2025305 PMAQI
25th Jul 2025346 PMAQI
25th Jul 2025387 PMAQI
25th Jul 2025408 PMAQI
25th Jul 2025439 PMAQI
25th Jul 20254810 PMAQI
25th Jul 20254411 PMAQI
26th Jul 20254212 AMAQI
26th Jul 2025441 AMAQI
26th Jul 2025472 AMAQI
26th Jul 2025483 AMAQI
26th Jul 2025464 AMAQI
26th Jul 2025465 AMAQI
27°C24/32°C
26th Jul 2025466 AMAQI
26th Jul 2025447 AMAQI
26th Jul 2025318 AMAQI
26th Jul 2025319 AMAQI
26th Jul 20253210 AMAQI
26th Jul 20253011 AMAQI
26th Jul 20252912 PMAQI
26th Jul 2025311 PMAQI
26th Jul 2025312 PMAQI
26th Jul 2025273 PMAQI
26th Jul 2025254 PMAQI
26th Jul 2025245 PMAQI
26th Jul 2025246 PMAQI
26th Jul 2025317 PMAQI
26th Jul 2025378 PMAQI
26th Jul 2025419 PMAQI
26th Jul 20254310 PMAQI
26th Jul 20254211 PMAQI
27th Jul 20254112 AMAQI
27th Jul 2025421 AMAQI
27th Jul 2025472 AMAQI
27th Jul 2025453 AMAQI
27th Jul 2025424 AMAQI
27th Jul 2025425 AMAQI
28°C24/33°C
27th Jul 2025436 AMAQI
27th Jul 2025447 AMAQI
27th Jul 2025418 AMAQI
27th Jul 2025359 AMAQI
27th Jul 20253410 AMAQI
27th Jul 20254311 AMAQI
27th Jul 20253912 PMAQI
27th Jul 2025401 PMAQI
27th Jul 2025362 PMAQI
27th Jul 2025363 PMAQI
27th Jul 2025364 PMAQI
27th Jul 2025365 PMAQI
27th Jul 2025346 PMAQI
27th Jul 2025347 PMAQI
27th Jul 2025368 PMAQI
27th Jul 2025419 PMAQI
27th Jul 20253810 PMAQI
27th Jul 20253711 PMAQI
28th Jul 20253612 AMAQI
28th Jul 2025401 AMAQI
28th Jul 2025462 AMAQI
28th Jul 2025443 AMAQI
28th Jul 2025434 AMAQI
28th Jul 2025445 AMAQI
28°C25/33°C
28th Jul 2025446 AMAQI
28th Jul 2025447 AMAQI
28th Jul 2025428 AMAQI
28th Jul 2025389 AMAQI
28th Jul 20253610 AMAQI
28th Jul 20253311 AMAQI
28th Jul 20253212 PMAQI
28th Jul 2025301 PMAQI
28th Jul 2025292 PMAQI
28th Jul 2025233 PMAQI
28th Jul 2025234 PMAQI
28th Jul 2025255 PMAQI
28th Jul 2025286 PMAQI
28th Jul 2025307 PMAQI
28th Jul 2025328 PMAQI
28th Jul 2025359 PMAQI
28th Jul 20253610 PMAQI
28th Jul 20254011 PMAQI
29th Jul 20254812 AMAQI
29th Jul 2025471 AMAQI
29th Jul 2025452 AMAQI
29th Jul 2025443 AMAQI
29th Jul 2025424 AMAQI
29th Jul 2025425 AMAQI
27°C24/32°C
29th Jul 2025426 AMAQI
29th Jul 2025417 AMAQI
29th Jul 2025328 AMAQI
29th Jul 2025279 AMAQI
29th Jul 20252710 AMAQI
29th Jul 20252911 AMAQI
29th Jul 20252212 PMAQI
29th Jul 2025221 PMAQI
29th Jul 2025242 PMAQI
29th Jul 2025233 PMAQI
29th Jul 2025234 PMAQI
29th Jul 2025305 PMAQI
29th Jul 2025366 PMAQI
29th Jul 2025407 PMAQI
29th Jul 2025428 PMAQI
29th Jul 2025509 PMAQI
29th Jul 20254510 PMAQI
29th Jul 20254411 PMAQI
30th Jul 20254212 AMAQI
30th Jul 2025421 AMAQI
30th Jul 2025412 AMAQI
30th Jul 2025403 AMAQI
30th Jul 2025374 AMAQI
30th Jul 2025425 AMAQI
28°C25/33°C
30th Jul 2025446 AMAQI
30th Jul 2025447 AMAQI
30th Jul 2025368 AMAQI
30th Jul 2025399 AMAQI
30th Jul 20254010 AMAQI
30th Jul 20253711 AMAQI
30th Jul 20253712 PMAQI
30th Jul 2025351 PMAQI
30th Jul 2025372 PMAQI
30th Jul 2025333 PMAQI
30th Jul 2025304 PMAQI
30th Jul 2025305 PMAQI
30th Jul 2025356 PMAQI
30th Jul 2025337 PMAQI
30th Jul 2025338 PMAQI
30th Jul 2025349 PMAQI
30th Jul 20253410 PMAQI
30th Jul 20253311 PMAQI
31st Jul 20254412 AMAQI
31st Jul 2025471 AMAQI
31st Jul 2025462 AMAQI
31st Jul 2025453 AMAQI
31st Jul 2025454 AMAQI
31st Jul 2025455 AMAQI
29°C25/34°C
31st Jul 2025456 AMAQI
31st Jul 2025457 AMAQI
31st Jul 2025458 AMAQI
31st Jul 2025459 AMAQI
31st Jul 20255110 AMAQI
31st Jul 20254411 AMAQI
31st Jul 20253812 PMAQI
31st Jul 2025421 PMAQI
31st Jul 2025412 PMAQI
31st Jul 2025413 PMAQI
31st Jul 2025424 PMAQI
31st Jul 2025425 PMAQI
31st Jul 2025386 PMAQI
31st Jul 2025417 PMAQI
31st Jul 2025548 PMAQI
31st Jul 2025539 PMAQI
31st Jul 20255610 PMAQI
31st Jul 20255611 PMAQI
1st Aug 20255812 AMAQI
1st Aug 2025581 AMAQI
1st Aug 2025582 AMAQI
1st Aug 2025543 AMAQI
1st Aug 2025554 AMAQI
1st Aug 2025545 AMAQI
29°C25/35°C
1st Aug 2025566 AMAQI
1st Aug 2025567 AMAQI
1st Aug 2025548 AMAQI
1st Aug 2025589 AMAQI
1st Aug 20255610 AMAQI
1st Aug 20255511 AMAQI
1st Aug 20255212 PMAQI
1st Aug 2025601 PMAQI
1st Aug 2025502 PMAQI
1st Aug 2025463 PMAQI
1st Aug 2025494 PMAQI
1st Aug 2025445 PMAQI
1st Aug 2025516 PMAQI
1st Aug 2025507 PMAQI
1st Aug 2025508 PMAQI
1st Aug 2025539 PMAQI
1st Aug 20255210 PMAQI
1st Aug 20255311 PMAQI
2nd Aug 20255412 AMAQI
2nd Aug 2025551 AMAQI
2nd Aug 2025562 AMAQI
2nd Aug 2025563 AMAQI
2nd Aug 2025554 AMAQI
2nd Aug 2025565 AMAQI
28°C25/33°C
2nd Aug 2025566 AMAQI
2nd Aug 2025567 AMAQI
2nd Aug 2025448 AMAQI
2nd Aug 2025489 AMAQI
2nd Aug 20254210 AMAQI
2nd Aug 20255411 AMAQI
2nd Aug 20255112 PMAQI
2nd Aug 2025521 PMAQI
2nd Aug 2025452 PMAQI
2nd Aug 2025473 PMAQI
2nd Aug 2025464 PMAQI
2nd Aug 2025325 PMAQI
2nd Aug 2025426 PMAQI
2nd Aug 2025507 PMAQI
2nd Aug 2025518 PMAQI
2nd Aug 2025519 PMAQI
2nd Aug 20255210 PMAQI
2nd Aug 20255211 PMAQI
3rd Aug 20254912 AMAQI
3rd Aug 2025571 AMAQI
3rd Aug 2025562 AMAQI
3rd Aug 2025563 AMAQI
3rd Aug 2025554 AMAQI
3rd Aug 2025565 AMAQI
28°C25/34°C
3rd Aug 2025566 AMAQI
3rd Aug 2025567 AMAQI
3rd Aug 2025568 AMAQI
3rd Aug 2025589 AMAQI
3rd Aug 20255910 AMAQI
3rd Aug 20256211 AMAQI
3rd Aug 20256512 PMAQI
3rd Aug 2025541 PMAQI
3rd Aug 2025532 PMAQI
3rd Aug 2025493 PMAQI
3rd Aug 2025494 PMAQI
3rd Aug 2025465 PMAQI
3rd Aug 2025446 PMAQI
3rd Aug 2025487 PMAQI
3rd Aug 2025548 PMAQI
3rd Aug 2025549 PMAQI
3rd Aug 20255610 PMAQI
3rd Aug 20255511 PMAQI
4th Aug 20255612 AMAQI
4th Aug 2025571 AMAQI
4th Aug 2025562 AMAQI
4th Aug 2025563 AMAQI
4th Aug 2025564 AMAQI
--°C/°C
6 AM
12 PM
7 PM
12 AM
5 AM
--°C/°C
Day time
Avg. Highest Time
6 AM - 7 AM
46AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
2 PM - 6 PM
36AQI
5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 7 AM (Avg. 46), while the lowest AQI was between 2 PM to 6 PM (Avg. 36).
Night time
Avg. Highest Time
12 AM - 5 AM
46AQI
6 hours / Day
180 hours / Month
Avg. Lowest Time
8 PM - 11 PM
43AQI
4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 5 AM (Avg. 46), while the lowest AQI was between 8 PM to 11 PM (Avg. 43).
2025 Days Vs Air Quality
Environmental Resources Monitoring Unit, Haikou, Hainan, China
2025
42%
91
53%
114
5%
10
Total number of days with different AQI categories in last 215 days in 2025 (150 days remaining)
Good
91 DaysModerate
114 DaysPoor
10 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 42%
Health Risk Level:
Significant
In 2025, 42% of 215 days were within WHO’s safe air quality limits, and 58% exceeded them. The risk of health issues is Significant, especially for those with existing respiratory or heart conditions.
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.
1st January 2025
121AQI
121AQI
2nd January 2025
101AQI
101AQI
3rd January 2025
107AQI
107AQI
4th January 2025
90AQI
90AQI
5th January 2025
107AQI
107AQI
6th January 2025
115AQI
115AQI
7th January 2025
90AQI
90AQI
8th January 2025
91AQI
91AQI
9th January 2025
114AQI
114AQI
10th January 2025
108AQI
108AQI
11th January 2025
93AQI
93AQI
12th January 2025
82AQI
82AQI
13th January 2025
78AQI
78AQI
14th January 2025
73AQI
73AQI
15th January 2025
88AQI
88AQI
16th January 2025
96AQI
96AQI
17th January 2025
91AQI
91AQI
18th January 2025
86AQI
86AQI
19th January 2025
92AQI
92AQI
20th January 2025
96AQI
96AQI
21st January 2025
84AQI
84AQI
22nd January 2025
90AQI
90AQI
23rd January 2025
80AQI
80AQI
24th January 2025
61AQI
61AQI
25th January 2025
60AQI
60AQI
26th January 2025
60AQI
60AQI
27th January 2025
59AQI
59AQI
28th January 2025
65AQI
65AQI
29th January 2025
91AQI
91AQI
30th January 2025
69AQI
69AQI
31st January 2025
62AQI
62AQI
1st February 2025
52AQI
52AQI
2nd February 2025
47AQI
47AQI
3rd February 2025
59AQI
59AQI
4th February 2025
52AQI
52AQI
5th February 2025
57AQI
57AQI
6th February 2025
58AQI
58AQI
7th February 2025
70AQI
70AQI
8th February 2025
60AQI
60AQI
9th February 2025
68AQI
68AQI
10th February 2025
60AQI
60AQI
11th February 2025
56AQI
56AQI
12th February 2025
52AQI
52AQI
13th February 2025
63AQI
63AQI
14th February 2025
46AQI
46AQI
15th February 2025
65AQI
65AQI
16th February 2025
44AQI
44AQI
17th February 2025
65AQI
65AQI
18th February 2025
76AQI
76AQI
19th February 2025
71AQI
71AQI
20th February 2025
64AQI
64AQI
21st February 2025
60AQI
60AQI
22nd February 2025
45AQI
45AQI
23rd February 2025
54AQI
54AQI
24th February 2025
49AQI
49AQI
25th February 2025
56AQI
56AQI
26th February 2025
68AQI
68AQI
27th February 2025
63AQI
63AQI
28th February 2025
56AQI
56AQI
1st March 2025
55AQI
55AQI
2nd March 2025
56AQI
56AQI
3rd March 2025
60AQI
60AQI
4th March 2025
49AQI
49AQI
5th March 2025
44AQI
44AQI
6th March 2025
30AQI
30AQI
7th March 2025
42AQI
42AQI
8th March 2025
40AQI
40AQI
9th March 2025
61AQI
61AQI
10th March 2025
61AQI
61AQI
11th March 2025
59AQI
59AQI
12th March 2025
48AQI
48AQI
13th March 2025
46AQI
46AQI
14th March 2025
38AQI
38AQI
15th March 2025
53AQI
53AQI
16th March 2025
46AQI
46AQI
17th March 2025
66AQI
66AQI
18th March 2025
69AQI
69AQI
19th March 2025
86AQI
86AQI
20th March 2025
77AQI
77AQI
21st March 2025
84AQI
84AQI
22nd March 2025
76AQI
76AQI
23rd March 2025
75AQI
75AQI
24th March 2025
71AQI
71AQI
25th March 2025
74AQI
74AQI
26th March 2025
66AQI
66AQI
27th March 2025
67AQI
67AQI
28th March 2025
60AQI
60AQI
29th March 2025
48AQI
48AQI
30th March 2025
31AQI
31AQI
31st March 2025
34AQI
34AQI
1st April 2025
36AQI
36AQI
2nd April 2025
62AQI
62AQI
3rd April 2025
55AQI
55AQI
4th April 2025
58AQI
58AQI
5th April 2025
59AQI
59AQI
6th April 2025
47AQI
47AQI
7th April 2025
61AQI
61AQI
8th April 2025
56AQI
56AQI
9th April 2025
62AQI
62AQI
10th April 2025
62AQI
62AQI
11th April 2025
61AQI
61AQI
12th April 2025
62AQI
62AQI
13th April 2025
131AQI
131AQI
14th April 2025
131AQI
131AQI
15th April 2025
122AQI
122AQI
16th April 2025
98AQI
98AQI
17th April 2025
90AQI
90AQI
18th April 2025
75AQI
75AQI
19th April 2025
61AQI
61AQI
20th April 2025
60AQI
60AQI
21st April 2025
58AQI
58AQI
22nd April 2025
63AQI
63AQI
23rd April 2025
54AQI
54AQI
24th April 2025
60AQI
60AQI
25th April 2025
54AQI
54AQI
26th April 2025
51AQI
51AQI
27th April 2025
47AQI
47AQI
28th April 2025
54AQI
54AQI
29th April 2025
54AQI
54AQI
30th April 2025
53AQI
53AQI
1st May 2025
53AQI
53AQI
2nd May 2025
59AQI
59AQI
3rd May 2025
59AQI
59AQI
4th May 2025
58AQI
58AQI
5th May 2025
52AQI
52AQI
6th May 2025
58AQI
58AQI
7th May 2025
58AQI
58AQI
8th May 2025
53AQI
53AQI
9th May 2025
54AQI
54AQI
10th May 2025
47AQI
47AQI
11th May 2025
53AQI
53AQI
12th May 2025
61AQI
61AQI
13th May 2025
57AQI
57AQI
14th May 2025
45AQI
45AQI
15th May 2025
37AQI
37AQI
16th May 2025
36AQI
36AQI
17th May 2025
38AQI
38AQI
18th May 2025
39AQI
39AQI
19th May 2025
38AQI
38AQI
20th May 2025
42AQI
42AQI
21st May 2025
48AQI
48AQI
22nd May 2025
38AQI
38AQI
23rd May 2025
35AQI
35AQI
24th May 2025
35AQI
35AQI
25th May 2025
50AQI
50AQI
26th May 2025
71AQI
71AQI
27th May 2025
54AQI
54AQI
28th May 2025
52AQI
52AQI
29th May 2025
50AQI
50AQI
30th May 2025
50AQI
50AQI
31st May 2025
40AQI
40AQI
1st June 2025
46AQI
46AQI
2nd June 2025
43AQI
43AQI
3rd June 2025
51AQI
51AQI
4th June 2025
55AQI
55AQI
5th June 2025
43AQI
43AQI
6th June 2025
42AQI
42AQI
7th June 2025
49AQI
49AQI
8th June 2025
50AQI
50AQI
9th June 2025
53AQI
53AQI
10th June 2025
54AQI
54AQI
11th June 2025
43AQI
43AQI
12th June 2025
31AQI
31AQI
13th June 2025
34AQI
34AQI
14th June 2025
34AQI
34AQI
15th June 2025
36AQI
36AQI
16th June 2025
39AQI
39AQI
17th June 2025
43AQI
43AQI
18th June 2025
39AQI
39AQI
19th June 2025
38AQI
38AQI
20th June 2025
35AQI
35AQI
21st June 2025
33AQI
33AQI
22nd June 2025
37AQI
37AQI
23rd June 2025
33AQI
33AQI
24th June 2025
29AQI
29AQI
25th June 2025
32AQI
32AQI
26th June 2025
27AQI
27AQI
27th June 2025
27AQI
27AQI
28th June 2025
28AQI
28AQI
29th June 2025
29AQI
29AQI
30th June 2025
28AQI
28AQI
1st July 2025
28AQI
28AQI
2nd July 2025
28AQI
28AQI
3rd July 2025
27AQI
27AQI
4th July 2025
29AQI
29AQI
5th July 2025
31AQI
31AQI
6th July 2025
36AQI
36AQI
7th July 2025
34AQI
34AQI
8th July 2025
39AQI
39AQI
9th July 2025
41AQI
41AQI
10th July 2025
45AQI
45AQI
11th July 2025
47AQI
47AQI
12th July 2025
46AQI
46AQI
13th July 2025
47AQI
47AQI
14th July 2025
48AQI
48AQI
15th July 2025
52AQI
52AQI
16th July 2025
51AQI
51AQI
17th July 2025
48AQI
48AQI
18th July 2025
49AQI
49AQI
19th July 2025
43AQI
43AQI
20th July 2025
36AQI
36AQI
21st July 2025
33AQI
33AQI
22nd July 2025
34AQI
34AQI
23rd July 2025
34AQI
34AQI
24th July 2025
35AQI
35AQI
25th July 2025
39AQI
39AQI
26th July 2025
37AQI
37AQI
27th July 2025
39AQI
39AQI
28th July 2025
36AQI
36AQI
29th July 2025
37AQI
37AQI
30th July 2025
37AQI
37AQI
31st July 2025
46AQI
46AQI
1st August 2025
53AQI
53AQI
2nd August 2025
51AQI
51AQI
3rd August 2025
55AQI
55AQI
87AQI
58AQI
57AQI
67AQI
49AQI
39AQI
39AQI
53AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202557AQI
24
7
5
23
12
19
3
24
3
16
15
26
4
29
2
3
91
114
10
Highest AQI recorded in
January87AQI
Lowest AQI recorded in
June39AQI
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
December83AQI
Lowest AQI recorded in
July30AQI
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
November81AQI
Lowest AQI recorded in
July17AQI
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
December68AQI
Lowest AQI recorded in
June34AQI
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
January94AQI
Lowest AQI recorded in
August36AQI
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
December94AQI
Lowest AQI recorded in
July28AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
61AQILeast Polluted Year Recorded
2022(Avg.)
48AQIEnvironmental Resources Monitoring Unit's annual 2025 AQI (57) shows an average percentage change of 6.6% (worsened AQI) compared to previous years: 2020 (52), 2021 (53), 2022 (48), 2023 (61), 2024 (52).
