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HistoryAQIPM2.5PM10COSO2NO2O3

Hedongzi Station, Sanya, 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

Hedongzi Station, Sanya, Hainan, China

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
5th Sep 2022
77AQI
Lowest AQI recorded on
8th Sep 2022
14AQI

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

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 20th Sep - 21st Sep 2025

Hedongzi Station, Sanya, Hainan, China

AQI
Day
Night
.

6 AM20th Sep 2025

6 PM

5 AM21st Sep 2025

Day time
Avg. Highest Time
6AM20th Sep

27AQI

Avg. Lowest Time
4PM20th Sep

17AQI

Night time
Avg. Highest Time
9PM20th Sep

39AQI

Avg. Lowest Time
7PM20th Sep

24AQI

In the last 24 hours,

Hedongzi Station's AQI reached its highest point of 39 at 9 PM during the Night, while the lowest point, 17, was recorded at 4 PM during the Day between 20th Sep and 21st Sep 2025.

Day & Night AQI Trend : Aug - Sep 2025

Hedongzi Station, Sanya, Hainan, China

AugSep
22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st
Day
Night
22nd Aug 2025326 AMAQI
22nd Aug 2025347 AMAQI
22nd Aug 2025198 AMAQI
22nd Aug 2025249 AMAQI
22nd Aug 20252310 AMAQI
22nd Aug 20253011 AMAQI
22nd Aug 20253412 PMAQI
22nd Aug 2025301 PMAQI
22nd Aug 2025262 PMAQI
22nd Aug 2025263 PMAQI
22nd Aug 2025304 PMAQI
22nd Aug 2025325 PMAQI
22nd Aug 2025276 PMAQI
22nd Aug 2025297 PMAQI
22nd Aug 2025338 PMAQI
22nd Aug 2025289 PMAQI
22nd Aug 20252610 PMAQI
22nd Aug 20253111 PMAQI
23rd Aug 20253212 AMAQI
23rd Aug 2025371 AMAQI
23rd Aug 2025362 AMAQI
23rd Aug 2025343 AMAQI
23rd Aug 2025344 AMAQI
23rd Aug 2025345 AMAQI

28°C26/31°C

23rd Aug 2025326 AMAQI
23rd Aug 2025337 AMAQI
23rd Aug 2025368 AMAQI
23rd Aug 2025229 AMAQI
23rd Aug 20252110 AMAQI
23rd Aug 20252611 AMAQI
23rd Aug 20253312 PMAQI
23rd Aug 2025201 PMAQI
23rd Aug 2025192 PMAQI
23rd Aug 2025183 PMAQI
23rd Aug 2025214 PMAQI
23rd Aug 2025275 PMAQI
23rd Aug 2025266 PMAQI
23rd Aug 2025327 PMAQI
23rd Aug 2025328 PMAQI
23rd Aug 2025389 PMAQI
23rd Aug 20253510 PMAQI
23rd Aug 20252811 PMAQI
24th Aug 20253412 AMAQI
24th Aug 2025351 AMAQI
24th Aug 2025352 AMAQI
24th Aug 2025343 AMAQI
24th Aug 2025334 AMAQI
24th Aug 2025345 AMAQI

28°C25/31°C

24th Aug 2025346 AMAQI
24th Aug 2025347 AMAQI
24th Aug 2025278 AMAQI
24th Aug 2025169 AMAQI
24th Aug 20251910 AMAQI
24th Aug 20252411 AMAQI
24th Aug 20252412 PMAQI
24th Aug 2025241 PMAQI
24th Aug 2025242 PMAQI
24th Aug 2025283 PMAQI
24th Aug 2025204 PMAQI
24th Aug 2025255 PMAQI
24th Aug 2025246 PMAQI
24th Aug 2025357 PMAQI
24th Aug 2025348 PMAQI
24th Aug 2025309 PMAQI
24th Aug 20253210 PMAQI
24th Aug 20253011 PMAQI
25th Aug 20253412 AMAQI
25th Aug 2025341 AMAQI
25th Aug 2025342 AMAQI
25th Aug 2025333 AMAQI
25th Aug 2025394 AMAQI
25th Aug 2025365 AMAQI

26°C25/29°C

25th Aug 2025366 AMAQI
25th Aug 2025347 AMAQI
25th Aug 2025248 AMAQI
25th Aug 2025259 AMAQI
25th Aug 20252610 AMAQI
25th Aug 20252211 AMAQI
25th Aug 20252412 PMAQI
25th Aug 2025201 PMAQI
25th Aug 2025322 PMAQI
25th Aug 2025213 PMAQI
25th Aug 2025264 PMAQI
25th Aug 2025285 PMAQI
25th Aug 2025326 PMAQI
25th Aug 2025317 PMAQI
25th Aug 2025338 PMAQI
25th Aug 2025339 PMAQI
25th Aug 20253210 PMAQI
25th Aug 20253211 PMAQI
26th Aug 20253412 AMAQI
26th Aug 2025341 AMAQI
26th Aug 2025382 AMAQI
26th Aug 2025343 AMAQI
26th Aug 2025364 AMAQI
26th Aug 2025365 AMAQI

26°C25/27°C

26th Aug 2025376 AMAQI
26th Aug 2025357 AMAQI
26th Aug 2025238 AMAQI
26th Aug 2025279 AMAQI
26th Aug 20252810 AMAQI
26th Aug 20252711 AMAQI
26th Aug 20252912 PMAQI
26th Aug 2025291 PMAQI
26th Aug 2025232 PMAQI
26th Aug 2025233 PMAQI
26th Aug 2025244 PMAQI
26th Aug 2025285 PMAQI
26th Aug 2025276 PMAQI
26th Aug 2025267 PMAQI
26th Aug 2025298 PMAQI
26th Aug 2025409 PMAQI
26th Aug 20253010 PMAQI
26th Aug 20253611 PMAQI
27th Aug 20252912 AMAQI
27th Aug 2025351 AMAQI
27th Aug 2025372 AMAQI
27th Aug 2025353 AMAQI
27th Aug 2025364 AMAQI
27th Aug 2025335 AMAQI

27°C26/30°C

27th Aug 2025346 AMAQI
27th Aug 2025347 AMAQI
27th Aug 2025308 AMAQI
27th Aug 2025279 AMAQI
27th Aug 20253110 AMAQI
27th Aug 20253211 AMAQI
27th Aug 20253412 PMAQI
27th Aug 2025291 PMAQI
27th Aug 2025262 PMAQI
27th Aug 2025253 PMAQI
27th Aug 2025204 PMAQI
27th Aug 2025225 PMAQI
27th Aug 2025186 PMAQI
27th Aug 2025287 PMAQI
27th Aug 2025278 PMAQI
27th Aug 2025309 PMAQI
27th Aug 20253110 PMAQI
27th Aug 20253411 PMAQI
28th Aug 20252712 AMAQI
28th Aug 2025341 AMAQI
28th Aug 2025352 AMAQI
28th Aug 2025333 AMAQI
28th Aug 2025344 AMAQI
28th Aug 2025335 AMAQI

27°C25/30°C

28th Aug 2025356 AMAQI
28th Aug 2025337 AMAQI
28th Aug 2025418 AMAQI
28th Aug 2025409 AMAQI
28th Aug 20253410 AMAQI
28th Aug 20252811 AMAQI
28th Aug 20253412 PMAQI
28th Aug 2025281 PMAQI
28th Aug 2025312 PMAQI
28th Aug 2025363 PMAQI
28th Aug 2025534 PMAQI
28th Aug 2025425 PMAQI
28th Aug 2025366 PMAQI
28th Aug 2025287 PMAQI
28th Aug 2025298 PMAQI
28th Aug 2025309 PMAQI
28th Aug 20252910 PMAQI
28th Aug 20252911 PMAQI
29th Aug 20253212 AMAQI
29th Aug 2025371 AMAQI
29th Aug 2025422 AMAQI
29th Aug 2025383 AMAQI
29th Aug 2025404 AMAQI
29th Aug 2025385 AMAQI

27°C24/30°C

29th Aug 2025426 AMAQI
29th Aug 2025417 AMAQI
29th Aug 2025368 AMAQI
29th Aug 2025299 AMAQI
29th Aug 20252210 AMAQI
29th Aug 20252611 AMAQI
29th Aug 20252812 PMAQI
29th Aug 2025261 PMAQI
29th Aug 2025252 PMAQI
29th Aug 2025363 PMAQI
29th Aug 2025364 PMAQI
29th Aug 2025245 PMAQI
29th Aug 2025346 PMAQI
29th Aug 2025387 PMAQI
29th Aug 2025368 PMAQI
29th Aug 2025319 PMAQI
29th Aug 20253210 PMAQI
29th Aug 20252811 PMAQI
30th Aug 20253312 AMAQI
30th Aug 2025401 AMAQI
30th Aug 2025382 AMAQI
30th Aug 2025373 AMAQI
30th Aug 2025364 AMAQI
30th Aug 2025385 AMAQI

27°C25/29°C

30th Aug 2025366 AMAQI
30th Aug 2025367 AMAQI
30th Aug 2025188 AMAQI
30th Aug 2025269 AMAQI
30th Aug 20252810 AMAQI
30th Aug 20252011 AMAQI
30th Aug 20252712 PMAQI
30th Aug 2025281 PMAQI
30th Aug 2025222 PMAQI
30th Aug 2025253 PMAQI
30th Aug 2025194 PMAQI
30th Aug 2025185 PMAQI
30th Aug 2025236 PMAQI
30th Aug 2025277 PMAQI
30th Aug 2025328 PMAQI
30th Aug 2025349 PMAQI
30th Aug 20253210 PMAQI
30th Aug 20253211 PMAQI
31st Aug 20253312 AMAQI
31st Aug 2025381 AMAQI
31st Aug 2025402 AMAQI
31st Aug 2025363 AMAQI
31st Aug 2025344 AMAQI
31st Aug 2025375 AMAQI

27°C26/28°C

31st Aug 2025366 AMAQI
31st Aug 2025367 AMAQI
31st Aug 2025228 AMAQI
31st Aug 2025239 AMAQI
31st Aug 20252310 AMAQI
31st Aug 20251811 AMAQI
31st Aug 20252512 PMAQI
31st Aug 2025271 PMAQI
31st Aug 2025192 PMAQI
31st Aug 2025203 PMAQI
31st Aug 2025324 PMAQI
31st Aug 2025225 PMAQI
31st Aug 2025276 PMAQI
31st Aug 2025257 PMAQI
31st Aug 2025328 PMAQI
31st Aug 2025299 PMAQI
31st Aug 20253410 PMAQI
31st Aug 20253411 PMAQI
1st Sep 20253412 AMAQI
1st Sep 2025371 AMAQI
1st Sep 2025382 AMAQI
1st Sep 2025363 AMAQI
1st Sep 2025334 AMAQI
1st Sep 2025355 AMAQI

27°C24/30°C

1st Sep 2025426 AMAQI
1st Sep 2025367 AMAQI
1st Sep 2025258 AMAQI
1st Sep 2025259 AMAQI
1st Sep 20251510 AMAQI
1st Sep 20251911 AMAQI
1st Sep 20252312 PMAQI
1st Sep 2025261 PMAQI
1st Sep 2025242 PMAQI
1st Sep 2025263 PMAQI
1st Sep 2025264 PMAQI
1st Sep 2025215 PMAQI
1st Sep 2025216 PMAQI
1st Sep 2025307 PMAQI
1st Sep 2025338 PMAQI
1st Sep 2025309 PMAQI
1st Sep 20253010 PMAQI
1st Sep 20252811 PMAQI
2nd Sep 20253312 AMAQI
2nd Sep 2025401 AMAQI
2nd Sep 2025382 AMAQI
2nd Sep 2025393 AMAQI
2nd Sep 2025364 AMAQI
2nd Sep 2025365 AMAQI

27°C25/30°C

2nd Sep 2025366 AMAQI
2nd Sep 2025407 AMAQI
2nd Sep 2025228 AMAQI
2nd Sep 2025449 AMAQI
2nd Sep 20252010 AMAQI
2nd Sep 20254611 AMAQI
2nd Sep 20252012 PMAQI
2nd Sep 2025221 PMAQI
2nd Sep 2025222 PMAQI
2nd Sep 2025243 PMAQI
2nd Sep 2025244 PMAQI
2nd Sep 2025245 PMAQI
2nd Sep 2025306 PMAQI
2nd Sep 2025387 PMAQI
2nd Sep 2025388 PMAQI
2nd Sep 2025359 PMAQI
2nd Sep 20253610 PMAQI
2nd Sep 20253511 PMAQI
3rd Sep 20253512 AMAQI
3rd Sep 2025361 AMAQI
3rd Sep 2025412 AMAQI
3rd Sep 2025393 AMAQI
3rd Sep 2025374 AMAQI
3rd Sep 2025365 AMAQI

27°C25/30°C

3rd Sep 2025376 AMAQI
3rd Sep 2025367 AMAQI
3rd Sep 2025218 AMAQI
3rd Sep 2025339 AMAQI
3rd Sep 20252110 AMAQI
3rd Sep 20252311 AMAQI
3rd Sep 20252712 PMAQI
3rd Sep 2025241 PMAQI
3rd Sep 2025242 PMAQI
3rd Sep 2025193 PMAQI
3rd Sep 2025224 PMAQI
3rd Sep 2025215 PMAQI
3rd Sep 2025386 PMAQI
3rd Sep 2025327 PMAQI
3rd Sep 2025288 PMAQI
3rd Sep 2025289 PMAQI
3rd Sep 20253010 PMAQI
3rd Sep 20252811 PMAQI
4th Sep 20253312 AMAQI
4th Sep 2025381 AMAQI
4th Sep 2025382 AMAQI
4th Sep 2025383 AMAQI
4th Sep 2025324 AMAQI
4th Sep 2025355 AMAQI

27°C25/30°C

4th Sep 2025356 AMAQI
4th Sep 2025367 AMAQI
4th Sep 2025208 AMAQI
4th Sep 2025299 AMAQI
4th Sep 20252810 AMAQI
4th Sep 20253111 AMAQI
4th Sep 20253512 PMAQI
4th Sep 2025251 PMAQI
4th Sep 2025232 PMAQI
4th Sep 2025223 PMAQI
4th Sep 2025234 PMAQI
4th Sep 2025195 PMAQI
4th Sep 2025206 PMAQI
4th Sep 2025207 PMAQI
4th Sep 2025198 PMAQI
4th Sep 2025289 PMAQI
4th Sep 20253010 PMAQI
4th Sep 20252011 PMAQI
5th Sep 20252112 AMAQI
5th Sep 2025321 AMAQI
5th Sep 2025352 AMAQI
5th Sep 2025323 AMAQI
5th Sep 2025324 AMAQI
5th Sep 2025395 AMAQI

27°C25/30°C

5th Sep 2025366 AMAQI
5th Sep 2025347 AMAQI
5th Sep 2025248 AMAQI
5th Sep 2025219 AMAQI
5th Sep 20253210 AMAQI
5th Sep 20252211 AMAQI
5th Sep 20252612 PMAQI
5th Sep 2025261 PMAQI
5th Sep 2025312 PMAQI
5th Sep 2025313 PMAQI
5th Sep 2025184 PMAQI
5th Sep 2025265 PMAQI
5th Sep 2025256 PMAQI
5th Sep 2025257 PMAQI
5th Sep 2025268 PMAQI
5th Sep 2025309 PMAQI
5th Sep 20252810 PMAQI
5th Sep 20253011 PMAQI
6th Sep 20252812 AMAQI
6th Sep 2025281 AMAQI
6th Sep 2025242 AMAQI
6th Sep 2025293 AMAQI
6th Sep 2025304 AMAQI
6th Sep 2025315 AMAQI

27°C25/30°C

6th Sep 2025346 AMAQI
6th Sep 2025337 AMAQI
6th Sep 2025238 AMAQI
6th Sep 2025249 AMAQI
6th Sep 20251910 AMAQI
6th Sep 20252211 AMAQI
6th Sep 20252212 PMAQI
6th Sep 2025231 PMAQI
6th Sep 2025262 PMAQI
6th Sep 2025293 PMAQI
6th Sep 2025294 PMAQI
6th Sep 2025315 PMAQI
6th Sep 2025326 PMAQI
6th Sep 2025307 PMAQI
6th Sep 2025268 PMAQI
6th Sep 2025349 PMAQI
6th Sep 20253310 PMAQI
6th Sep 20253211 PMAQI
7th Sep 20253812 AMAQI
7th Sep 2025301 AMAQI
7th Sep 2025342 AMAQI
7th Sep 2025323 AMAQI
7th Sep 2025304 AMAQI
7th Sep 2025285 AMAQI

27°C25/30°C

7th Sep 2025306 AMAQI
7th Sep 2025307 AMAQI
7th Sep 2025338 AMAQI
7th Sep 2025389 AMAQI
7th Sep 20253810 AMAQI
7th Sep 20254611 AMAQI
7th Sep 20253412 PMAQI
7th Sep 2025401 PMAQI
7th Sep 2025462 PMAQI
7th Sep 2025413 PMAQI
7th Sep 2025424 PMAQI
7th Sep 2025385 PMAQI
7th Sep 2025486 PMAQI
7th Sep 2025427 PMAQI
7th Sep 2025448 PMAQI
7th Sep 2025409 PMAQI
7th Sep 20254210 PMAQI
7th Sep 20254011 PMAQI
8th Sep 20253512 AMAQI
8th Sep 2025321 AMAQI
8th Sep 2025312 AMAQI
8th Sep 2025353 AMAQI
8th Sep 2025344 AMAQI
8th Sep 2025345 AMAQI

27°C24/31°C

8th Sep 2025346 AMAQI
8th Sep 2025347 AMAQI
8th Sep 2025308 AMAQI
8th Sep 2025319 AMAQI
8th Sep 20253410 AMAQI
8th Sep 20252411 AMAQI
8th Sep 20252312 PMAQI
8th Sep 2025221 PMAQI
8th Sep 2025312 PMAQI
8th Sep 2025303 PMAQI
8th Sep 2025284 PMAQI
8th Sep 2025335 PMAQI
8th Sep 2025286 PMAQI
8th Sep 2025337 PMAQI
8th Sep 2025328 PMAQI
8th Sep 2025329 PMAQI
8th Sep 20253210 PMAQI
8th Sep 20253511 PMAQI
9th Sep 20253012 AMAQI
9th Sep 2025361 AMAQI
9th Sep 2025362 AMAQI
9th Sep 2025363 AMAQI
9th Sep 2025404 AMAQI
9th Sep 2025365 AMAQI

27°C26/30°C

9th Sep 2025346 AMAQI
9th Sep 2025347 AMAQI
9th Sep 2025258 AMAQI
9th Sep 2025279 AMAQI
9th Sep 20253310 AMAQI
9th Sep 20252611 AMAQI
9th Sep 20253012 PMAQI
9th Sep 2025351 PMAQI
9th Sep 2025322 PMAQI
9th Sep 2025293 PMAQI
9th Sep 2025314 PMAQI
9th Sep 2025365 PMAQI
9th Sep 2025366 PMAQI
9th Sep 2025377 PMAQI
9th Sep 2025338 PMAQI
9th Sep 2025349 PMAQI
9th Sep 20253510 PMAQI
9th Sep 20253311 PMAQI
10th Sep 20253512 AMAQI
10th Sep 2025401 AMAQI
10th Sep 2025342 AMAQI
10th Sep 2025373 AMAQI
10th Sep 2025344 AMAQI
10th Sep 2025345 AMAQI

27°C25/30°C

10th Sep 2025346 AMAQI
10th Sep 2025357 AMAQI
10th Sep 2025298 AMAQI
10th Sep 2025249 AMAQI
10th Sep 20253410 AMAQI
10th Sep 20253511 AMAQI
10th Sep 20252712 PMAQI
10th Sep 2025231 PMAQI
10th Sep 2025242 PMAQI
10th Sep 2025233 PMAQI
10th Sep 2025304 PMAQI
10th Sep 2025265 PMAQI
10th Sep 2025296 PMAQI
10th Sep 2025377 PMAQI
10th Sep 2025378 PMAQI
10th Sep 2025379 PMAQI
10th Sep 20253610 PMAQI
10th Sep 20253911 PMAQI
11th Sep 20253512 AMAQI
11th Sep 2025371 AMAQI
11th Sep 2025362 AMAQI
11th Sep 2025363 AMAQI
11th Sep 2025354 AMAQI
11th Sep 2025345 AMAQI

27°C26/29°C

11th Sep 2025326 AMAQI
11th Sep 2025347 AMAQI
11th Sep 2025198 AMAQI
11th Sep 2025249 AMAQI
11th Sep 20252610 AMAQI
11th Sep 20252711 AMAQI
11th Sep 20252412 PMAQI
11th Sep 2025261 PMAQI
11th Sep 2025322 PMAQI
11th Sep 2025303 PMAQI
11th Sep 2025314 PMAQI
11th Sep 2025295 PMAQI
11th Sep 2025266 PMAQI
11th Sep 2025367 PMAQI
11th Sep 2025308 PMAQI
11th Sep 2025349 PMAQI
11th Sep 20253210 PMAQI
11th Sep 20253411 PMAQI
12th Sep 20253212 AMAQI
12th Sep 2025361 AMAQI
12th Sep 2025372 AMAQI
12th Sep 2025353 AMAQI
12th Sep 2025334 AMAQI
12th Sep 2025355 AMAQI

27°C25/30°C

12th Sep 2025366 AMAQI
12th Sep 2025387 AMAQI
12th Sep 2025258 AMAQI
12th Sep 2025189 AMAQI
12th Sep 20252410 AMAQI
12th Sep 20252011 AMAQI
12th Sep 20252312 PMAQI
12th Sep 2025271 PMAQI
12th Sep 2025272 PMAQI
12th Sep 2025333 PMAQI
12th Sep 2025314 PMAQI
12th Sep 2025325 PMAQI
12th Sep 2025326 PMAQI
12th Sep 2025337 PMAQI
12th Sep 2025318 PMAQI
12th Sep 2025349 PMAQI
12th Sep 20253410 PMAQI
12th Sep 20253211 PMAQI
13th Sep 20253212 AMAQI
13th Sep 2025371 AMAQI
13th Sep 2025342 AMAQI
13th Sep 2025333 AMAQI
13th Sep 2025344 AMAQI
13th Sep 2025335 AMAQI

27°C25/31°C

13th Sep 2025346 AMAQI
13th Sep 2025337 AMAQI
13th Sep 2025148 AMAQI
13th Sep 2025179 AMAQI
13th Sep 20251610 AMAQI
13th Sep 20251811 AMAQI
13th Sep 20252612 PMAQI
13th Sep 2025221 PMAQI
13th Sep 2025222 PMAQI
13th Sep 2025243 PMAQI
13th Sep 2025204 PMAQI
13th Sep 2025225 PMAQI
13th Sep 2025246 PMAQI
13th Sep 2025247 PMAQI
13th Sep 2025308 PMAQI
13th Sep 2025339 PMAQI
13th Sep 20253110 PMAQI
13th Sep 20252811 PMAQI
14th Sep 20253012 AMAQI
14th Sep 2025321 AMAQI
14th Sep 2025342 AMAQI
14th Sep 2025323 AMAQI
14th Sep 2025344 AMAQI
14th Sep 2025345 AMAQI

27°C25/31°C

14th Sep 2025326 AMAQI
14th Sep 2025327 AMAQI
14th Sep 2025258 AMAQI
14th Sep 2025129 AMAQI
14th Sep 20251810 AMAQI
14th Sep 20251511 AMAQI
14th Sep 20251512 PMAQI
14th Sep 2025171 PMAQI
14th Sep 2025192 PMAQI
14th Sep 2025203 PMAQI
14th Sep 2025164 PMAQI
14th Sep 2025185 PMAQI
14th Sep 2025206 PMAQI
14th Sep 2025267 PMAQI
14th Sep 2025268 PMAQI
14th Sep 2025319 PMAQI
14th Sep 20252910 PMAQI
14th Sep 20253011 PMAQI
15th Sep 20253812 AMAQI
15th Sep 2025321 AMAQI
15th Sep 2025302 AMAQI
15th Sep 2025303 AMAQI
15th Sep 2025294 AMAQI
15th Sep 2025295 AMAQI

27°C25/30°C

15th Sep 2025306 AMAQI
15th Sep 2025307 AMAQI
15th Sep 2025278 AMAQI
15th Sep 2025249 AMAQI
15th Sep 20251910 AMAQI
15th Sep 20252411 AMAQI
15th Sep 20251812 PMAQI
15th Sep 2025191 PMAQI
15th Sep 2025202 PMAQI
15th Sep 2025183 PMAQI
15th Sep 2025174 PMAQI
15th Sep 2025195 PMAQI
15th Sep 2025186 PMAQI
15th Sep 2025247 PMAQI
15th Sep 2025308 PMAQI
15th Sep 2025309 PMAQI
15th Sep 20252710 PMAQI
15th Sep 20252611 PMAQI
16th Sep 20252512 AMAQI
16th Sep 2025291 AMAQI
16th Sep 2025322 AMAQI
16th Sep 2025303 AMAQI
16th Sep 2025294 AMAQI
16th Sep 2025295 AMAQI

27°C25/30°C

16th Sep 2025306 AMAQI
16th Sep 2025297 AMAQI
16th Sep 2025308 AMAQI
16th Sep 2025279 AMAQI
16th Sep 20254010 AMAQI
16th Sep 20254011 AMAQI
16th Sep 20253212 PMAQI
16th Sep 2025251 PMAQI
16th Sep 2025242 PMAQI
16th Sep 2025223 PMAQI
16th Sep 2025174 PMAQI
16th Sep 2025195 PMAQI
16th Sep 2025186 PMAQI
16th Sep 2025257 PMAQI
16th Sep 2025338 PMAQI
16th Sep 2025369 PMAQI
16th Sep 20253410 PMAQI
16th Sep 20253011 PMAQI
17th Sep 20252712 AMAQI
17th Sep 2025301 AMAQI
17th Sep 2025302 AMAQI
17th Sep 2025293 AMAQI
17th Sep 2025294 AMAQI
17th Sep 2025295 AMAQI

27°C25/31°C

17th Sep 2025296 AMAQI
17th Sep 2025307 AMAQI
17th Sep 2025288 AMAQI
17th Sep 2025449 AMAQI
17th Sep 20254010 AMAQI
17th Sep 20254911 AMAQI
17th Sep 20254012 PMAQI
17th Sep 2025291 PMAQI
17th Sep 2025212 PMAQI
17th Sep 2025303 PMAQI
17th Sep 2025174 PMAQI
17th Sep 2025225 PMAQI
17th Sep 2025346 PMAQI
17th Sep 2025327 PMAQI
17th Sep 2025328 PMAQI
17th Sep 2025429 PMAQI
17th Sep 20253610 PMAQI
17th Sep 20254211 PMAQI
18th Sep 20252812 AMAQI
18th Sep 2025291 AMAQI
18th Sep 2025302 AMAQI
18th Sep 2025293 AMAQI
18th Sep 2025304 AMAQI
18th Sep 2025315 AMAQI

27°C24/30°C

18th Sep 2025316 AMAQI
18th Sep 2025327 AMAQI
18th Sep 2025228 AMAQI
18th Sep 2025239 AMAQI
18th Sep 20253110 AMAQI
18th Sep 20253811 AMAQI
18th Sep 20254412 PMAQI
18th Sep 2025241 PMAQI
18th Sep 2025332 PMAQI
18th Sep 2025343 PMAQI
18th Sep 2025304 PMAQI
18th Sep 2025205 PMAQI
18th Sep 2025176 PMAQI
18th Sep 2025207 PMAQI
18th Sep 2025318 PMAQI
18th Sep 2025319 PMAQI
18th Sep 20252410 PMAQI
18th Sep 20252411 PMAQI
19th Sep 20252212 AMAQI
19th Sep 2025281 AMAQI
19th Sep 2025312 AMAQI
19th Sep 2025313 AMAQI
19th Sep 2025324 AMAQI
19th Sep 2025325 AMAQI

27°C24/31°C

19th Sep 2025326 AMAQI
19th Sep 2025327 AMAQI
19th Sep 2025198 AMAQI
19th Sep 2025269 AMAQI
19th Sep 20251710 AMAQI
19th Sep 20252611 AMAQI
19th Sep 20252612 PMAQI
19th Sep 2025201 PMAQI
19th Sep 2025182 PMAQI
19th Sep 2025193 PMAQI
19th Sep 2025174 PMAQI
19th Sep 2025175 PMAQI
19th Sep 2025306 PMAQI
19th Sep 2025227 PMAQI
19th Sep 2025258 PMAQI
19th Sep 2025269 PMAQI
19th Sep 20253210 PMAQI
19th Sep 20253411 PMAQI
20th Sep 20253412 AMAQI
20th Sep 2025291 AMAQI
20th Sep 2025282 AMAQI
20th Sep 2025273 AMAQI
20th Sep 2025284 AMAQI
20th Sep 2025275 AMAQI

27°C25/31°C

20th Sep 2025276 AMAQI
20th Sep 2025277 AMAQI
20th Sep 2025268 AMAQI
20th Sep 2025279 AMAQI
20th Sep 20252610 AMAQI
20th Sep 20252011 AMAQI
20th Sep 20252212 PMAQI
20th Sep 2025211 PMAQI
20th Sep 2025242 PMAQI
20th Sep 2025223 PMAQI
20th Sep 2025174 PMAQI
20th Sep 2025215 PMAQI
20th Sep 2025206 PMAQI
20th Sep 2025247 PMAQI
20th Sep 2025288 PMAQI
20th Sep 2025399 PMAQI
20th Sep 20253010 PMAQI
20th Sep 20253411 PMAQI
21st Sep 20253312 AMAQI
21st Sep 2025311 AMAQI
21st Sep 2025292 AMAQI
21st Sep 2025303 AMAQI
21st Sep 2025304 AMAQI
21st Sep 2025285 AMAQI

27°C25/30°C

21st Sep 2025286 AMAQI
6 AM
21st Sep 2025287 AMAQI
21st Sep 2025288 AMAQI
21st Sep 2025289 AMAQI
21st Sep 20252710 AMAQI
21st Sep 20253811 AMAQI
21st Sep 20253012 PMAQI
12 PM
21st Sep 2025311 PMAQI
21st Sep 2025282 PMAQI
21st Sep 2025273 PMAQI
6 PM
12 AM
5 AM

--°C/°C

Day time
Avg. Highest Time
6 AM - 7 AM

34AQI

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

25AQI

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. 34), while the lowest AQI was between 1 PM to 1 PM (Avg. 25).
Night time
Avg. Highest Time
1 AM - 5 AM

34AQI

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

30AQI

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. 34), while the lowest AQI was between 7 PM to 7 PM (Avg. 30).

2025 Days Vs Air Quality

Hedongzi Station, Sanya, Hainan, China

2025

64%

169

34%

90

2%

4

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

Good
169 Days
Moderate
90 Days
Poor
4 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 64%

Health Risk Level:

Moderate

In 2025, 64% of 264 days were within WHO’s safe air quality limits, and 36% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.

Annual Air Quality Insights

Hedongzi Station, Sanya, 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
82AQI
2nd January 2025
70AQI
3rd January 2025
84AQI
4th January 2025
72AQI
5th January 2025
86AQI
6th January 2025
87AQI
7th January 2025
78AQI
8th January 2025
71AQI
9th January 2025
71AQI
10th January 2025
103AQI
11th January 2025
74AQI
12th January 2025
82AQI
13th January 2025
63AQI
14th January 2025
53AQI
15th January 2025
51AQI
16th January 2025
77AQI
17th January 2025
83AQI
18th January 2025
77AQI
19th January 2025
79AQI
20th January 2025
78AQI
21st January 2025
71AQI
22nd January 2025
68AQI
23rd January 2025
65AQI
24th January 2025
57AQI
25th January 2025
55AQI
26th January 2025
51AQI
27th January 2025
53AQI
28th January 2025
57AQI
29th January 2025
59AQI
30th January 2025
56AQI
31st January 2025
52AQI
1st February 2025
44AQI
2nd February 2025
40AQI
3rd February 2025
45AQI
4th February 2025
39AQI
5th February 2025
49AQI
6th February 2025
56AQI
7th February 2025
59AQI
8th February 2025
45AQI
9th February 2025
57AQI
10th February 2025
55AQI
11th February 2025
42AQI
12th February 2025
43AQI
13th February 2025
42AQI
14th February 2025
35AQI
15th February 2025
51AQI
16th February 2025
33AQI
17th February 2025
55AQI
18th February 2025
60AQI
19th February 2025
66AQI
20th February 2025
60AQI
21st February 2025
60AQI
22nd February 2025
43AQI
23rd February 2025
39AQI
24th February 2025
34AQI
25th February 2025
36AQI
26th February 2025
47AQI
27th February 2025
52AQI
28th February 2025
54AQI
1st March 2025
51AQI
2nd March 2025
46AQI
3rd March 2025
49AQI
4th March 2025
40AQI
5th March 2025
45AQI
6th March 2025
37AQI
7th March 2025
37AQI
8th March 2025
34AQI
9th March 2025
52AQI
10th March 2025
50AQI
11th March 2025
55AQI
12th March 2025
50AQI
13th March 2025
47AQI
14th March 2025
42AQI
15th March 2025
46AQI
16th March 2025
39AQI
17th March 2025
40AQI
18th March 2025
39AQI
19th March 2025
56AQI
20th March 2025
61AQI
21st March 2025
68AQI
22nd March 2025
66AQI
23rd March 2025
62AQI
24th March 2025
62AQI
25th March 2025
61AQI
26th March 2025
55AQI
27th March 2025
60AQI
28th March 2025
51AQI
29th March 2025
58AQI
30th March 2025
34AQI
31st March 2025
33AQI
1st April 2025
32AQI
2nd April 2025
46AQI
3rd April 2025
53AQI
4th April 2025
56AQI
5th April 2025
62AQI
6th April 2025
48AQI
7th April 2025
58AQI
8th April 2025
57AQI
9th April 2025
63AQI
10th April 2025
57AQI
11th April 2025
59AQI
12th April 2025
58AQI
13th April 2025
62AQI
14th April 2025
108AQI
15th April 2025
107AQI
16th April 2025
116AQI
17th April 2025
98AQI
18th April 2025
76AQI
19th April 2025
62AQI
20th April 2025
55AQI
21st April 2025
53AQI
22nd April 2025
51AQI
23rd April 2025
48AQI
24th April 2025
48AQI
25th April 2025
50AQI
26th April 2025
46AQI
27th April 2025
34AQI
28th April 2025
50AQI
29th April 2025
37AQI
30th April 2025
54AQI
1st May 2025
52AQI
2nd May 2025
55AQI
3rd May 2025
58AQI
4th May 2025
52AQI
5th May 2025
50AQI
6th May 2025
53AQI
7th May 2025
53AQI
8th May 2025
49AQI
9th May 2025
55AQI
10th May 2025
47AQI
11th May 2025
42AQI
12th May 2025
56AQI
13th May 2025
47AQI
14th May 2025
42AQI
15th May 2025
37AQI
16th May 2025
31AQI
17th May 2025
35AQI
18th May 2025
41AQI
19th May 2025
34AQI
20th May 2025
42AQI
21st May 2025
37AQI
22nd May 2025
30AQI
23rd May 2025
29AQI
24th May 2025
26AQI
25th May 2025
38AQI
26th May 2025
46AQI
27th May 2025
42AQI
28th May 2025
44AQI
29th May 2025
38AQI
30th May 2025
40AQI
31st May 2025
42AQI
1st June 2025
41AQI
2nd June 2025
44AQI
3rd June 2025
45AQI
4th June 2025
45AQI
5th June 2025
40AQI
6th June 2025
38AQI
7th June 2025
41AQI
8th June 2025
48AQI
9th June 2025
47AQI
10th June 2025
54AQI
11th June 2025
44AQI
12th June 2025
34AQI
13th June 2025
35AQI
14th June 2025
37AQI
15th June 2025
40AQI
16th June 2025
47AQI
17th June 2025
47AQI
18th June 2025
45AQI
19th June 2025
43AQI
20th June 2025
39AQI
21st June 2025
36AQI
22nd June 2025
34AQI
23rd June 2025
29AQI
24th June 2025
30AQI
25th June 2025
28AQI
26th June 2025
27AQI
27th June 2025
26AQI
28th June 2025
26AQI
29th June 2025
26AQI
30th June 2025
29AQI
1st July 2025
29AQI
2nd July 2025
28AQI
3rd July 2025
26AQI
4th July 2025
26AQI
5th July 2025
27AQI
6th July 2025
28AQI
7th July 2025
29AQI
8th July 2025
30AQI
9th July 2025
34AQI
10th July 2025
36AQI
11th July 2025
40AQI
12th July 2025
39AQI
13th July 2025
41AQI
14th July 2025
45AQI
15th July 2025
47AQI
16th July 2025
48AQI
17th July 2025
46AQI
18th July 2025
43AQI
19th July 2025
41AQI
20th July 2025
38AQI
21st July 2025
40AQI
22nd July 2025
34AQI
23rd July 2025
33AQI
24th July 2025
34AQI
25th July 2025
34AQI
26th July 2025
37AQI
27th July 2025
34AQI
28th July 2025
33AQI
29th July 2025
33AQI
30th July 2025
34AQI
31st July 2025
43AQI
1st August 2025
57AQI
2nd August 2025
58AQI
3rd August 2025
57AQI
4th August 2025
56AQI
5th August 2025
55AQI
6th August 2025
56AQI
7th August 2025
53AQI
8th August 2025
50AQI
9th August 2025
51AQI
10th August 2025
47AQI
11th August 2025
45AQI
12th August 2025
39AQI
13th August 2025
37AQI
14th August 2025
34AQI
15th August 2025
35AQI
16th August 2025
28AQI
17th August 2025
28AQI
18th August 2025
26AQI
19th August 2025
28AQI
20th August 2025
29AQI
21st August 2025
30AQI
22nd August 2025
30AQI
23rd August 2025
30AQI
24th August 2025
31AQI
25th August 2025
31AQI
26th August 2025
32AQI
27th August 2025
29AQI
28th August 2025
32AQI
29th August 2025
32AQI
30th August 2025
31AQI
31st August 2025
30AQI
1st September 2025
30AQI
2nd September 2025
34AQI
3rd September 2025
30AQI
4th September 2025
27AQI
5th September 2025
26AQI
6th September 2025
29AQI
7th September 2025
38AQI
8th September 2025
32AQI
9th September 2025
32AQI
10th September 2025
34AQI
11th September 2025
32AQI
12th September 2025
31AQI
13th September 2025
28AQI
14th September 2025
26AQI
15th September 2025
26AQI
16th September 2025
29AQI
17th September 2025
32AQI
18th September 2025
28AQI
19th September 2025
26AQI
20th September 2025
29AQI
21st September 2025
22nd September 2025
23rd September 2025
24th September 2025
25th September 2025
26th September 2025
27th September 2025
28th September 2025
29th September 2025
30th September 2025
1st October 2025
2nd October 2025
3rd October 2025
4th October 2025
5th October 2025
6th October 2025
7th October 2025
8th October 2025
9th October 2025
10th October 2025
11th October 2025
12th October 2025
13th October 2025
14th October 2025
15th October 2025
16th October 2025
17th October 2025
18th October 2025
19th October 2025
20th October 2025
21st October 2025
22nd October 2025
23rd October 2025
24th October 2025
25th October 2025
26th October 2025
27th October 2025
28th October 2025
29th October 2025
30th October 2025
31st October 2025
1st November 2025
2nd November 2025
3rd November 2025
4th November 2025
5th November 2025
6th November 2025
7th November 2025
8th November 2025
9th November 2025
10th November 2025
11th November 2025
12th November 2025
13th November 2025
14th November 2025
15th November 2025
16th November 2025
17th November 2025
18th November 2025
19th November 2025
20th November 2025
21st November 2025
22nd November 2025
23rd November 2025
24th November 2025
25th November 2025
26th November 2025
27th November 2025
28th November 2025
29th November 2025
30th November 2025
1st December 2025
2nd December 2025
3rd December 2025
4th December 2025
5th December 2025
6th December 2025
7th December 2025
8th December 2025
9th December 2025
10th December 2025
11th December 2025
12th December 2025
13th December 2025
14th December 2025
15th December 2025
16th December 2025
17th December 2025
18th December 2025
19th December 2025
20th December 2025
21st December 2025
22nd December 2025
23rd December 2025
24th December 2025
25th December 2025
26th December 2025
27th December 2025
28th December 2025
29th December 2025
30th December 2025
31st December 2025

70AQI

48AQI

49AQI

60AQI

43AQI

38AQI

36AQI

39AQI

30AQI

No. of days

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

202547AQI

30
1
16
12
17
14
10
17
3
23
8
29
1
31
23
8
20
169
90
4

Highest AQI recorded in

January

70AQI

Lowest AQI recorded in

September

30AQI

202446AQI

10
21
15
14
8
23
15
15
25
6
27
3
31
31
28
2
16
14
1
13
17
2
29
221
144
1

Highest AQI recorded in

December

63AQI

Lowest AQI recorded in

September

29AQI

202346AQI

14
17
15
12
1
8
22
1
7
22
1
17
14
25
5
31
29
2
28
2
24
7
15
10
1
23
8
236
121
4

Highest AQI recorded in

March

62AQI

Lowest AQI recorded in

July

29AQI

202245AQI

17
13
15
6
19
12
13
4
28
3
25
5
21
1
14
14
17
14
26
4
11
20
207
95

Highest AQI recorded in

December

56AQI

Lowest AQI recorded in

August

20AQI

202146AQI

6
22
2
1
8
20
15
16
17
13
27
4
19
11
27
4
22
6
29
1
28
3
15
15
13
16
2
226
131
4
1

Highest AQI recorded in

January

70AQI

Lowest AQI recorded in

September

29AQI

202042AQI

12
1
13
8
14
4
30
31
29
2
29
1
19
12
15
12
3
7
24
199
64
3

Highest AQI recorded in

December

61AQI

Lowest AQI recorded in

August

29AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2025(Avg.)
47AQI
Least Polluted Year Recorded
2020(Avg.)
42AQI

Hedongzi Station's annual 2025 AQI (47) shows an average percentage change of 3.9% (worsened AQI) compared to previous years: 2020 (42), 2021 (46), 2022 (45), 2023 (46), 2024 (46).