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HistoryAQIPM2.5PM10COSO2NO2O3

Sanmen Ring Supervision Station, Linhai, Zhejiang, 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

Sanmen Ring Supervision Station, Linhai, Zhejiang, China

2021
2022
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
12th Aug 2024
77AQI
Lowest AQI recorded on
4th Aug 2021
20AQI

Same Day Analysis (20th August ):
On this day, AQI across the 4 years varied significantly: 2025 ranks 3rd highest AQI at 50 of Good air quality, showing improvement over 2024 and 2021 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

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

Sanmen Ring Supervision Station, Linhai, Zhejiang, China

AQI
Day
Night
.

5 AM20th Aug 2025

6 PM

4 AM21st Aug 2025

Day time
Avg. Highest Time
6PM20th Aug

69AQI

Avg. Lowest Time
5AM20th Aug

47AQI

Night time
Avg. Highest Time
7PM20th Aug

64AQI

Avg. Lowest Time
2AM21st Aug

48AQI

In the last 24 hours,

Sanmen Ring Supervision Station's AQI reached its highest point of 69 at 6 PM during the Day, while the lowest point, 47, was recorded at 5 AM during the Day between 20th Aug and 21st Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Sanmen Ring Supervision Station, Linhai, Zhejiang, China

JulAug
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 Jul 2025525 AMAQI
22nd Jul 2025526 AMAQI
22nd Jul 2025527 AMAQI
22nd Jul 2025308 AMAQI
22nd Jul 2025279 AMAQI
22nd Jul 20252410 AMAQI
22nd Jul 20252811 AMAQI
22nd Jul 20253212 PMAQI
22nd Jul 2025361 PMAQI
22nd Jul 2025352 PMAQI
22nd Jul 2025323 PMAQI
22nd Jul 2025344 PMAQI
22nd Jul 2025365 PMAQI
22nd Jul 2025406 PMAQI
22nd Jul 2025437 PMAQI
22nd Jul 2025478 PMAQI
22nd Jul 2025459 PMAQI
22nd Jul 20254410 PMAQI
22nd Jul 20254311 PMAQI
23rd Jul 20254612 AMAQI
23rd Jul 2025521 AMAQI
23rd Jul 2025522 AMAQI
23rd Jul 2025503 AMAQI
23rd Jul 2025484 AMAQI

26°C23/30°C

23rd Jul 2025485 AMAQI
23rd Jul 2025486 AMAQI
23rd Jul 2025487 AMAQI
23rd Jul 2025308 AMAQI
23rd Jul 2025269 AMAQI
23rd Jul 20252610 AMAQI
23rd Jul 20252411 AMAQI
23rd Jul 20252712 PMAQI
23rd Jul 2025301 PMAQI
23rd Jul 2025282 PMAQI
23rd Jul 2025283 PMAQI
23rd Jul 2025314 PMAQI
23rd Jul 2025325 PMAQI
23rd Jul 2025356 PMAQI
23rd Jul 2025417 PMAQI
23rd Jul 2025428 PMAQI
23rd Jul 2025429 PMAQI
23rd Jul 20253910 PMAQI
23rd Jul 20253811 PMAQI
24th Jul 20254112 AMAQI
24th Jul 2025401 AMAQI
24th Jul 2025472 AMAQI
24th Jul 2025463 AMAQI
24th Jul 2025454 AMAQI

27°C23/32°C

24th Jul 2025455 AMAQI
24th Jul 2025446 AMAQI
24th Jul 2025447 AMAQI
24th Jul 2025338 AMAQI
24th Jul 2025279 AMAQI
24th Jul 20252810 AMAQI
24th Jul 20253011 AMAQI
24th Jul 20253612 PMAQI
24th Jul 2025351 PMAQI
24th Jul 2025322 PMAQI
24th Jul 2025323 PMAQI
24th Jul 2025334 PMAQI
24th Jul 2025345 PMAQI
24th Jul 2025396 PMAQI
24th Jul 2025447 PMAQI
24th Jul 2025468 PMAQI
24th Jul 2025499 PMAQI
24th Jul 20254810 PMAQI
24th Jul 20254411 PMAQI
25th Jul 20254412 AMAQI
25th Jul 2025461 AMAQI
25th Jul 2025462 AMAQI
25th Jul 2025463 AMAQI
25th Jul 2025464 AMAQI

27°C24/29°C

25th Jul 2025465 AMAQI
25th Jul 2025446 AMAQI
25th Jul 2025447 AMAQI
25th Jul 2025348 AMAQI
25th Jul 2025329 AMAQI
25th Jul 20253510 AMAQI
25th Jul 20253911 AMAQI
25th Jul 20253812 PMAQI
25th Jul 2025381 PMAQI
25th Jul 2025362 PMAQI
25th Jul 2025353 PMAQI
25th Jul 2025344 PMAQI
25th Jul 2025345 PMAQI
25th Jul 2025386 PMAQI
25th Jul 2025387 PMAQI
25th Jul 2025348 PMAQI
25th Jul 2025389 PMAQI
25th Jul 20253410 PMAQI
25th Jul 20253211 PMAQI
26th Jul 20253412 AMAQI
26th Jul 2025421 AMAQI
26th Jul 2025462 AMAQI
26th Jul 2025463 AMAQI
26th Jul 2025464 AMAQI

26°C24/27°C

26th Jul 2025455 AMAQI
26th Jul 2025466 AMAQI
26th Jul 2025467 AMAQI
26th Jul 2025308 AMAQI
26th Jul 2025289 AMAQI
26th Jul 20252610 AMAQI
26th Jul 20252911 AMAQI
26th Jul 20253312 PMAQI
26th Jul 2025351 PMAQI
26th Jul 2025422 PMAQI
26th Jul 2025373 PMAQI
26th Jul 2025384 PMAQI
26th Jul 2025415 PMAQI
26th Jul 2025386 PMAQI
26th Jul 2025467 PMAQI
26th Jul 2025478 PMAQI
26th Jul 2025479 PMAQI
26th Jul 20254610 PMAQI
26th Jul 20254411 PMAQI
27th Jul 20254212 AMAQI
27th Jul 2025401 AMAQI
27th Jul 2025442 AMAQI
27th Jul 2025423 AMAQI
27th Jul 2025434 AMAQI

27°C25/30°C

27th Jul 2025435 AMAQI
27th Jul 2025436 AMAQI
27th Jul 2025447 AMAQI
27th Jul 2025408 AMAQI
27th Jul 2025379 AMAQI
27th Jul 20254310 AMAQI
27th Jul 20253911 AMAQI
27th Jul 20253612 PMAQI
27th Jul 2025381 PMAQI
27th Jul 2025422 PMAQI
27th Jul 2025363 PMAQI
27th Jul 2025394 PMAQI
27th Jul 2025445 PMAQI
27th Jul 2025436 PMAQI
27th Jul 2025497 PMAQI
27th Jul 2025488 PMAQI
27th Jul 2025409 PMAQI
27th Jul 20253610 PMAQI
27th Jul 20253711 PMAQI
28th Jul 20253712 AMAQI
28th Jul 2025451 AMAQI
28th Jul 2025472 AMAQI
28th Jul 2025453 AMAQI
28th Jul 2025414 AMAQI

27°C24/30°C

28th Jul 2025415 AMAQI
28th Jul 2025416 AMAQI
28th Jul 2025417 AMAQI
28th Jul 2025318 AMAQI
28th Jul 2025299 AMAQI
28th Jul 20253010 AMAQI
28th Jul 20252911 AMAQI
28th Jul 20253012 PMAQI
28th Jul 2025271 PMAQI
28th Jul 2025272 PMAQI
28th Jul 2025313 PMAQI
28th Jul 2025324 PMAQI
28th Jul 2025365 PMAQI
28th Jul 2025406 PMAQI
28th Jul 2025447 PMAQI
28th Jul 2025388 PMAQI
28th Jul 2025439 PMAQI
28th Jul 20254110 PMAQI
28th Jul 20254211 PMAQI
29th Jul 20254112 AMAQI
29th Jul 2025421 AMAQI
29th Jul 2025432 AMAQI
29th Jul 2025423 AMAQI
29th Jul 2025404 AMAQI

26°C24/29°C

29th Jul 2025395 AMAQI
29th Jul 2025396 AMAQI
29th Jul 2025387 AMAQI
29th Jul 2025338 AMAQI
29th Jul 2025379 AMAQI
29th Jul 20253910 AMAQI
29th Jul 20254011 AMAQI
29th Jul 20253712 PMAQI
29th Jul 2025381 PMAQI
29th Jul 2025342 PMAQI
29th Jul 2025343 PMAQI
29th Jul 2025344 PMAQI
29th Jul 2025365 PMAQI
29th Jul 2025346 PMAQI
29th Jul 2025337 PMAQI
29th Jul 2025378 PMAQI
29th Jul 2025399 PMAQI
29th Jul 20253810 PMAQI
29th Jul 20253711 PMAQI
30th Jul 20253512 AMAQI
30th Jul 2025421 AMAQI
30th Jul 2025432 AMAQI
30th Jul 2025433 AMAQI
30th Jul 2025434 AMAQI

25°C23/28°C

30th Jul 2025445 AMAQI
30th Jul 2025446 AMAQI
30th Jul 2025437 AMAQI
30th Jul 2025268 AMAQI
30th Jul 2025259 AMAQI
30th Jul 20253110 AMAQI
30th Jul 20253211 AMAQI
30th Jul 20253212 PMAQI
30th Jul 2025321 PMAQI
30th Jul 2025382 PMAQI
30th Jul 2025383 PMAQI
30th Jul 2025364 PMAQI
30th Jul 2025385 PMAQI
30th Jul 2025386 PMAQI
30th Jul 2025447 PMAQI
30th Jul 2025408 PMAQI
30th Jul 2025379 PMAQI
30th Jul 20253610 PMAQI
30th Jul 20253211 PMAQI
31st Jul 20253612 AMAQI
31st Jul 2025391 AMAQI
31st Jul 2025412 AMAQI
31st Jul 2025423 AMAQI
31st Jul 2025424 AMAQI

25°C23/26°C

31st Jul 2025425 AMAQI
31st Jul 2025426 AMAQI
31st Jul 2025427 AMAQI
31st Jul 2025428 AMAQI
31st Jul 2025429 AMAQI
31st Jul 20254810 AMAQI
31st Jul 20254711 AMAQI
31st Jul 20255212 PMAQI
31st Jul 2025511 PMAQI
31st Jul 2025512 PMAQI
31st Jul 2025523 PMAQI
31st Jul 2025544 PMAQI
31st Jul 2025595 PMAQI
31st Jul 2025666 PMAQI
31st Jul 2025667 PMAQI
31st Jul 2025568 PMAQI
31st Jul 2025559 PMAQI
31st Jul 20255410 PMAQI
31st Jul 20255411 PMAQI
1st Aug 20254712 AMAQI
1st Aug 2025401 AMAQI
1st Aug 2025402 AMAQI
1st Aug 2025433 AMAQI
1st Aug 2025454 AMAQI

27°C21/33°C

1st Aug 2025445 AMAQI
1st Aug 2025456 AMAQI
1st Aug 2025507 AMAQI
1st Aug 2025588 AMAQI
1st Aug 2025629 AMAQI
1st Aug 20256610 AMAQI
1st Aug 20256111 AMAQI
1st Aug 20257412 PMAQI
1st Aug 2025641 PMAQI
1st Aug 2025662 PMAQI
1st Aug 2025583 PMAQI
1st Aug 2025564 PMAQI
1st Aug 2025555 PMAQI
1st Aug 2025566 PMAQI
1st Aug 2025547 PMAQI
1st Aug 2025578 PMAQI
1st Aug 2025579 PMAQI
1st Aug 20255810 PMAQI
1st Aug 20256011 PMAQI
2nd Aug 20255312 AMAQI
2nd Aug 2025461 AMAQI
2nd Aug 2025452 AMAQI
2nd Aug 2025513 AMAQI
2nd Aug 2025524 AMAQI

27°C23/34°C

2nd Aug 2025525 AMAQI
2nd Aug 2025526 AMAQI
2nd Aug 2025527 AMAQI
2nd Aug 2025608 AMAQI
2nd Aug 2025659 AMAQI
2nd Aug 20256410 AMAQI
2nd Aug 20256211 AMAQI
2nd Aug 20257412 PMAQI
2nd Aug 2025681 PMAQI
2nd Aug 2025762 PMAQI
2nd Aug 2025683 PMAQI
2nd Aug 2025664 PMAQI
2nd Aug 2025645 PMAQI
2nd Aug 2025646 PMAQI
2nd Aug 2025597 PMAQI
2nd Aug 2025568 PMAQI
2nd Aug 2025589 PMAQI
2nd Aug 20255810 PMAQI
2nd Aug 20255911 PMAQI
3rd Aug 20255512 AMAQI
3rd Aug 2025521 AMAQI
3rd Aug 2025522 AMAQI
3rd Aug 2025543 AMAQI
3rd Aug 2025554 AMAQI

28°C24/35°C

3rd Aug 2025545 AMAQI
3rd Aug 2025556 AMAQI
3rd Aug 2025567 AMAQI
3rd Aug 2025688 AMAQI
3rd Aug 2025669 AMAQI
3rd Aug 20256610 AMAQI
3rd Aug 20257111 AMAQI
3rd Aug 20256412 PMAQI
3rd Aug 2025701 PMAQI
3rd Aug 2025642 PMAQI
3rd Aug 2025683 PMAQI
3rd Aug 2025684 PMAQI
3rd Aug 2025655 PMAQI
3rd Aug 2025646 PMAQI
3rd Aug 2025587 PMAQI
3rd Aug 2025618 PMAQI
3rd Aug 2025579 PMAQI
3rd Aug 20255710 PMAQI
3rd Aug 20255811 PMAQI
4th Aug 20255512 AMAQI
4th Aug 2025531 AMAQI
4th Aug 2025542 AMAQI
4th Aug 2025563 AMAQI
4th Aug 2025564 AMAQI

29°C24/35°C

4th Aug 2025565 AMAQI
4th Aug 2025566 AMAQI
4th Aug 2025567 AMAQI
4th Aug 2025608 AMAQI
4th Aug 2025649 AMAQI
4th Aug 20257710 AMAQI
4th Aug 20256911 AMAQI
4th Aug 20256712 PMAQI
4th Aug 2025741 PMAQI
4th Aug 2025642 PMAQI
4th Aug 2025723 PMAQI
4th Aug 2025684 PMAQI
4th Aug 2025625 PMAQI
4th Aug 2025626 PMAQI
4th Aug 2025567 PMAQI
4th Aug 2025548 PMAQI
4th Aug 2025529 PMAQI
4th Aug 20255510 PMAQI
4th Aug 20255411 PMAQI
5th Aug 20255512 AMAQI
5th Aug 2025551 AMAQI
5th Aug 2025552 AMAQI
5th Aug 2025563 AMAQI
5th Aug 2025564 AMAQI

28°C24/33°C

5th Aug 2025565 AMAQI
5th Aug 2025556 AMAQI
5th Aug 2025577 AMAQI
5th Aug 2025528 AMAQI
5th Aug 2025429 AMAQI
5th Aug 20254210 AMAQI
5th Aug 20254811 AMAQI
5th Aug 20254212 PMAQI
5th Aug 2025411 PMAQI
5th Aug 2025432 PMAQI
5th Aug 2025463 PMAQI
5th Aug 2025434 PMAQI
5th Aug 2025455 PMAQI
5th Aug 2025466 PMAQI
5th Aug 2025467 PMAQI
5th Aug 2025528 PMAQI
5th Aug 2025509 PMAQI
5th Aug 20255210 PMAQI
5th Aug 20255211 PMAQI
6th Aug 20255412 AMAQI
6th Aug 2025541 AMAQI
6th Aug 2025552 AMAQI
6th Aug 2025543 AMAQI
6th Aug 2025544 AMAQI

27°C23/33°C

6th Aug 2025545 AMAQI
6th Aug 2025546 AMAQI
6th Aug 2025547 AMAQI
6th Aug 2025408 AMAQI
6th Aug 2025419 AMAQI
6th Aug 20254010 AMAQI
6th Aug 20255211 AMAQI
6th Aug 20255212 PMAQI
6th Aug 2025561 PMAQI
6th Aug 2025562 PMAQI
6th Aug 2025553 PMAQI
6th Aug 2025544 PMAQI
6th Aug 2025565 PMAQI
6th Aug 2025586 PMAQI
6th Aug 2025567 PMAQI
6th Aug 2025578 PMAQI
6th Aug 2025589 PMAQI
6th Aug 20255810 PMAQI
6th Aug 20255711 PMAQI
7th Aug 20255412 AMAQI
7th Aug 2025531 AMAQI
7th Aug 2025532 AMAQI
7th Aug 2025533 AMAQI
7th Aug 2025524 AMAQI

28°C23/36°C

7th Aug 2025525 AMAQI
7th Aug 2025526 AMAQI
7th Aug 2025527 AMAQI
7th Aug 2025568 AMAQI
7th Aug 2025589 AMAQI
7th Aug 20255810 AMAQI
7th Aug 20255911 AMAQI
7th Aug 20255712 PMAQI
7th Aug 2025591 PMAQI
7th Aug 2025602 PMAQI
7th Aug 2025623 PMAQI
7th Aug 2025674 PMAQI
7th Aug 2025685 PMAQI
7th Aug 2025706 PMAQI
7th Aug 2025647 PMAQI
7th Aug 2025558 PMAQI
7th Aug 2025549 PMAQI
7th Aug 20255510 PMAQI
7th Aug 20255611 PMAQI
8th Aug 20255512 AMAQI
8th Aug 2025531 AMAQI
8th Aug 2025532 AMAQI
8th Aug 2025533 AMAQI
8th Aug 2025544 AMAQI

29°C23/35°C

8th Aug 2025545 AMAQI
8th Aug 2025546 AMAQI
8th Aug 2025547 AMAQI
8th Aug 2025628 AMAQI
8th Aug 2025679 AMAQI
8th Aug 20257410 AMAQI
8th Aug 20257611 AMAQI
8th Aug 20257112 PMAQI
8th Aug 2025681 PMAQI
8th Aug 2025622 PMAQI
8th Aug 2025683 PMAQI
8th Aug 2025694 PMAQI
8th Aug 2025665 PMAQI
8th Aug 2025676 PMAQI
8th Aug 2025667 PMAQI
8th Aug 2025618 PMAQI
8th Aug 2025609 PMAQI
8th Aug 20256010 PMAQI
8th Aug 20256111 PMAQI
9th Aug 20255912 AMAQI
9th Aug 2025541 AMAQI
9th Aug 2025542 AMAQI
9th Aug 2025563 AMAQI
9th Aug 2025584 AMAQI

29°C24/36°C

9th Aug 2025575 AMAQI
9th Aug 2025576 AMAQI
9th Aug 2025587 AMAQI
9th Aug 2025718 AMAQI
9th Aug 2025749 AMAQI
9th Aug 20257710 AMAQI
9th Aug 20257411 AMAQI
9th Aug 20257012 PMAQI
9th Aug 2025691 PMAQI
9th Aug 2025732 PMAQI
9th Aug 2025743 PMAQI
9th Aug 2025744 PMAQI
9th Aug 2025685 PMAQI
9th Aug 2025656 PMAQI
9th Aug 2025667 PMAQI
9th Aug 2025608 PMAQI
9th Aug 2025589 PMAQI
9th Aug 20255610 PMAQI
9th Aug 20255611 PMAQI
10th Aug 20255512 AMAQI
10th Aug 2025561 AMAQI
10th Aug 2025562 AMAQI
10th Aug 2025593 AMAQI
10th Aug 2025604 AMAQI

29°C24/37°C

10th Aug 2025605 AMAQI
10th Aug 2025606 AMAQI
10th Aug 2025607 AMAQI
10th Aug 2025638 AMAQI
10th Aug 2025689 AMAQI
10th Aug 20256610 AMAQI
10th Aug 20256811 AMAQI
10th Aug 20257012 PMAQI
10th Aug 2025661 PMAQI
10th Aug 2025672 PMAQI
10th Aug 2025713 PMAQI
10th Aug 2025744 PMAQI
10th Aug 2025705 PMAQI
10th Aug 2025686 PMAQI
10th Aug 2025687 PMAQI
10th Aug 2025648 PMAQI
10th Aug 2025639 PMAQI
10th Aug 20256510 PMAQI
10th Aug 20256211 PMAQI
11th Aug 20256112 AMAQI
11th Aug 2025581 AMAQI
11th Aug 2025582 AMAQI
11th Aug 2025583 AMAQI
11th Aug 2025604 AMAQI

29°C25/34°C

11th Aug 2025615 AMAQI
11th Aug 2025606 AMAQI
11th Aug 2025607 AMAQI
11th Aug 2025668 AMAQI
11th Aug 2025709 AMAQI
11th Aug 20257310 AMAQI
11th Aug 20256911 AMAQI
11th Aug 20257812 PMAQI
11th Aug 2025741 PMAQI
11th Aug 2025682 PMAQI
11th Aug 2025623 PMAQI
11th Aug 2025644 PMAQI
11th Aug 2025645 PMAQI
11th Aug 2025636 PMAQI
11th Aug 2025597 PMAQI
11th Aug 2025578 PMAQI
11th Aug 2025569 PMAQI
11th Aug 20255710 PMAQI
11th Aug 20255611 PMAQI
12th Aug 20255712 AMAQI
12th Aug 2025581 AMAQI
12th Aug 2025582 AMAQI
12th Aug 2025613 AMAQI
12th Aug 2025614 AMAQI

29°C24/36°C

12th Aug 2025605 AMAQI
12th Aug 2025616 AMAQI
12th Aug 2025627 AMAQI
12th Aug 2025578 AMAQI
12th Aug 2025609 AMAQI
12th Aug 20255810 AMAQI
12th Aug 20256411 AMAQI
12th Aug 20256212 PMAQI
12th Aug 2025601 PMAQI
12th Aug 2025592 PMAQI
12th Aug 2025603 PMAQI
12th Aug 2025564 PMAQI
12th Aug 2025565 PMAQI
12th Aug 2025566 PMAQI
12th Aug 2025587 PMAQI
12th Aug 2025568 PMAQI
12th Aug 2025569 PMAQI
12th Aug 20255510 PMAQI
12th Aug 20255411 PMAQI
13th Aug 20255412 AMAQI
13th Aug 2025591 AMAQI
13th Aug 2025592 AMAQI
13th Aug 2025593 AMAQI
13th Aug 2025594 AMAQI

28°C24/34°C

13th Aug 2025605 AMAQI
13th Aug 2025606 AMAQI
13th Aug 2025597 AMAQI
13th Aug 2025258 AMAQI
13th Aug 2025369 AMAQI
13th Aug 20252810 AMAQI
13th Aug 20252911 AMAQI
13th Aug 20253212 PMAQI
13th Aug 2025371 PMAQI
13th Aug 2025462 PMAQI
13th Aug 2025413 PMAQI
13th Aug 2025464 PMAQI
13th Aug 2025415 PMAQI
13th Aug 2025426 PMAQI
13th Aug 2025527 PMAQI
13th Aug 2025538 PMAQI
13th Aug 2025519 PMAQI
13th Aug 20254910 PMAQI
13th Aug 20254811 PMAQI
14th Aug 20255312 AMAQI
14th Aug 2025581 AMAQI
14th Aug 2025582 AMAQI
14th Aug 2025563 AMAQI
14th Aug 2025554 AMAQI

28°C24/33°C

14th Aug 2025555 AMAQI
14th Aug 2025556 AMAQI
14th Aug 2025567 AMAQI
14th Aug 2025248 AMAQI
14th Aug 2025219 AMAQI
14th Aug 20252410 AMAQI
14th Aug 20253011 AMAQI
14th Aug 20252512 PMAQI
14th Aug 2025301 PMAQI
14th Aug 2025302 PMAQI
14th Aug 2025263 PMAQI
14th Aug 2025324 PMAQI
14th Aug 2025265 PMAQI
14th Aug 2025346 PMAQI
14th Aug 2025457 PMAQI
14th Aug 2025448 PMAQI
14th Aug 2025439 PMAQI
14th Aug 20254210 PMAQI
14th Aug 20254211 PMAQI
15th Aug 20254712 AMAQI
15th Aug 2025541 AMAQI
15th Aug 2025562 AMAQI
15th Aug 2025533 AMAQI
15th Aug 2025524 AMAQI

27°C24/32°C

15th Aug 2025525 AMAQI
15th Aug 2025526 AMAQI
15th Aug 2025527 AMAQI
15th Aug 2025268 AMAQI
15th Aug 2025249 AMAQI
15th Aug 20252010 AMAQI
15th Aug 20252711 AMAQI
15th Aug 20252612 PMAQI
15th Aug 2025271 PMAQI
15th Aug 2025262 PMAQI
15th Aug 2025263 PMAQI
15th Aug 2025254 PMAQI
15th Aug 2025265 PMAQI
15th Aug 2025276 PMAQI
15th Aug 2025417 PMAQI
15th Aug 2025418 PMAQI
15th Aug 2025409 PMAQI
15th Aug 20253610 PMAQI
15th Aug 20253611 PMAQI
16th Aug 20254512 AMAQI
16th Aug 2025531 AMAQI
16th Aug 2025522 AMAQI
16th Aug 2025513 AMAQI
16th Aug 2025504 AMAQI

27°C23/33°C

16th Aug 2025495 AMAQI
16th Aug 2025486 AMAQI
16th Aug 2025497 AMAQI
16th Aug 2025268 AMAQI
16th Aug 2025299 AMAQI
16th Aug 20252710 AMAQI
16th Aug 20252811 AMAQI
16th Aug 20252812 PMAQI
16th Aug 2025281 PMAQI
16th Aug 2025292 PMAQI
16th Aug 2025313 PMAQI
16th Aug 2025344 PMAQI
16th Aug 2025405 PMAQI
16th Aug 2025486 PMAQI
16th Aug 2025437 PMAQI
16th Aug 2025478 PMAQI
16th Aug 2025489 PMAQI
16th Aug 20254910 PMAQI
16th Aug 20254811 PMAQI
17th Aug 20255012 AMAQI
17th Aug 2025491 AMAQI
17th Aug 2025502 AMAQI
17th Aug 2025453 AMAQI
17th Aug 2025464 AMAQI

27°C23/33°C

17th Aug 2025445 AMAQI
17th Aug 2025456 AMAQI
17th Aug 2025457 AMAQI
17th Aug 2025488 AMAQI
17th Aug 2025479 AMAQI
17th Aug 20254210 AMAQI
17th Aug 20255011 AMAQI
17th Aug 20254712 PMAQI
17th Aug 2025471 PMAQI
17th Aug 2025442 PMAQI
17th Aug 2025493 PMAQI
17th Aug 2025494 PMAQI
17th Aug 2025515 PMAQI
17th Aug 2025536 PMAQI
17th Aug 2025537 PMAQI
17th Aug 2025548 PMAQI
17th Aug 2025539 PMAQI
17th Aug 20254710 PMAQI
17th Aug 20254411 PMAQI
18th Aug 20254212 AMAQI
18th Aug 2025461 AMAQI
18th Aug 2025462 AMAQI
18th Aug 2025483 AMAQI
18th Aug 2025474 AMAQI

27°C22/34°C

18th Aug 2025485 AMAQI
18th Aug 2025466 AMAQI
18th Aug 2025487 AMAQI
18th Aug 2025488 AMAQI
18th Aug 2025429 AMAQI
18th Aug 20254010 AMAQI
18th Aug 20254111 AMAQI
18th Aug 20254212 PMAQI
18th Aug 2025461 PMAQI
18th Aug 2025452 PMAQI
18th Aug 2025423 PMAQI
18th Aug 2025414 PMAQI
18th Aug 2025455 PMAQI
18th Aug 2025436 PMAQI
18th Aug 2025487 PMAQI
18th Aug 2025518 PMAQI
18th Aug 2025469 PMAQI
18th Aug 20254310 PMAQI
18th Aug 20254611 PMAQI
19th Aug 20254412 AMAQI
19th Aug 2025471 AMAQI
19th Aug 2025462 AMAQI
19th Aug 2025453 AMAQI
19th Aug 2025464 AMAQI

28°C23/33°C

19th Aug 2025455 AMAQI
19th Aug 2025446 AMAQI
19th Aug 2025467 AMAQI
19th Aug 2025398 AMAQI
19th Aug 2025489 AMAQI
19th Aug 20253910 AMAQI
19th Aug 20254911 AMAQI
19th Aug 20255412 PMAQI
19th Aug 2025541 PMAQI
19th Aug 2025502 PMAQI
19th Aug 2025523 PMAQI
19th Aug 2025554 PMAQI
19th Aug 2025535 PMAQI
19th Aug 2025526 PMAQI
19th Aug 2025497 PMAQI
19th Aug 2025508 PMAQI
19th Aug 2025469 PMAQI
19th Aug 20254410 PMAQI
19th Aug 20254611 PMAQI
20th Aug 20254212 AMAQI
20th Aug 2025481 AMAQI
20th Aug 2025482 AMAQI
20th Aug 2025483 AMAQI
20th Aug 2025484 AMAQI

28°C23/35°C

20th Aug 2025475 AMAQI
20th Aug 2025486 AMAQI
20th Aug 2025487 AMAQI
20th Aug 2025488 AMAQI
20th Aug 2025539 AMAQI
20th Aug 20255410 AMAQI
20th Aug 20256211 AMAQI
20th Aug 20256312 PMAQI
20th Aug 2025661 PMAQI
20th Aug 2025662 PMAQI
20th Aug 2025643 PMAQI
20th Aug 2025684 PMAQI
20th Aug 2025665 PMAQI
20th Aug 2025696 PMAQI
20th Aug 2025647 PMAQI
20th Aug 2025578 PMAQI
20th Aug 2025589 PMAQI
20th Aug 20255710 PMAQI
20th Aug 20255811 PMAQI
21st Aug 20255612 AMAQI
21st Aug 2025491 AMAQI
21st Aug 2025482 AMAQI
21st Aug 2025503 AMAQI
21st Aug 2025524 AMAQI

29°C23/36°C

21st Aug 2025525 AMAQI
5 AM
21st Aug 2025526 AMAQI
21st Aug 2025527 AMAQI
21st Aug 2025598 AMAQI
21st Aug 2025629 AMAQI
21st Aug 20255910 AMAQI
21st Aug 20256111 AMAQI
11 AM
6 PM
11 PM
4 AM

--°C/°C

Day time
Avg. Highest Time
5 AM - 7 AM

50AQI

3 hours / Day
90 hours / Month
Avg. Lowest Time
8 AM - 6 PM

48AQI

11 hours / Day
330 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 7 AM (Avg. 50), while the lowest AQI was between 8 AM to 6 PM (Avg. 48).
Night time
Avg. Highest Time
12 AM - 11 PM

50AQI

10 hours / Day
300 hours / Month
Avg. Lowest Time
12 AM - 11 PM

50AQI

10 hours / Day
300 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 50), while the lowest AQI was between 12 AM to 11 PM (Avg. 50).

2025 Days Vs Air Quality

Sanmen Ring Supervision Station, Linhai, Zhejiang, China

2025

18%

42

66%

153

16%

36

0.4%

1

Total number of days with different AQI categories in last 233 days in 2025 (132 days remaining)

Good
42 Days
Moderate
153 Days
Poor
36 Days
Unhealthy
1 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 18%

Health Risk Level:

Extreme

In 2025, 18% of 233 days were within WHO’s safe air quality limits. The risk of health issues is Extreme, potentially causing respiratory problems, heart disease, skin issues, and stress, especially for children, the elderly, and those with pre-existing conditions.

Annual Air Quality Insights

Sanmen Ring Supervision Station, Linhai, Zhejiang, 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
102AQI
2nd January 2025
96AQI
3rd January 2025
102AQI
4th January 2025
81AQI
5th January 2025
115AQI
6th January 2025
113AQI
7th January 2025
134AQI
8th January 2025
140AQI
9th January 2025
98AQI
10th January 2025
94AQI
11th January 2025
104AQI
12th January 2025
113AQI
13th January 2025
131AQI
14th January 2025
116AQI
15th January 2025
103AQI
16th January 2025
92AQI
17th January 2025
112AQI
18th January 2025
109AQI
19th January 2025
115AQI
20th January 2025
140AQI
21st January 2025
153AQI
22nd January 2025
118AQI
23rd January 2025
98AQI
24th January 2025
82AQI
25th January 2025
81AQI
26th January 2025
72AQI
27th January 2025
65AQI
28th January 2025
78AQI
29th January 2025
117AQI
30th January 2025
92AQI
31st January 2025
99AQI
1st February 2025
52AQI
2nd February 2025
81AQI
3rd February 2025
119AQI
4th February 2025
109AQI
5th February 2025
98AQI
6th February 2025
104AQI
7th February 2025
82AQI
8th February 2025
68AQI
9th February 2025
80AQI
10th February 2025
87AQI
11th February 2025
78AQI
12th February 2025
110AQI
13th February 2025
104AQI
14th February 2025
80AQI
15th February 2025
96AQI
16th February 2025
114AQI
17th February 2025
98AQI
18th February 2025
78AQI
19th February 2025
94AQI
20th February 2025
74AQI
21st February 2025
68AQI
22nd February 2025
76AQI
23rd February 2025
102AQI
24th February 2025
130AQI
25th February 2025
129AQI
26th February 2025
149AQI
27th February 2025
141AQI
28th February 2025
108AQI
1st March 2025
92AQI
2nd March 2025
88AQI
3rd March 2025
77AQI
4th March 2025
53AQI
5th March 2025
66AQI
6th March 2025
62AQI
7th March 2025
77AQI
8th March 2025
102AQI
9th March 2025
79AQI
10th March 2025
82AQI
11th March 2025
97AQI
12th March 2025
78AQI
13th March 2025
68AQI
14th March 2025
68AQI
15th March 2025
37AQI
16th March 2025
79AQI
17th March 2025
70AQI
18th March 2025
80AQI
19th March 2025
82AQI
20th March 2025
94AQI
21st March 2025
78AQI
22nd March 2025
83AQI
23rd March 2025
80AQI
24th March 2025
99AQI
25th March 2025
111AQI
26th March 2025
115AQI
27th March 2025
110AQI
28th March 2025
85AQI
29th March 2025
85AQI
30th March 2025
69AQI
31st March 2025
63AQI
1st April 2025
70AQI
2nd April 2025
77AQI
3rd April 2025
94AQI
4th April 2025
77AQI
5th April 2025
84AQI
6th April 2025
88AQI
7th April 2025
87AQI
8th April 2025
90AQI
9th April 2025
90AQI
10th April 2025
76AQI
11th April 2025
81AQI
12th April 2025
107AQI
13th April 2025
90AQI
14th April 2025
102AQI
15th April 2025
78AQI
16th April 2025
85AQI
17th April 2025
92AQI
18th April 2025
91AQI
19th April 2025
72AQI
20th April 2025
104AQI
21st April 2025
75AQI
22nd April 2025
77AQI
23rd April 2025
55AQI
24th April 2025
78AQI
25th April 2025
63AQI
26th April 2025
58AQI
27th April 2025
71AQI
28th April 2025
68AQI
29th April 2025
66AQI
30th April 2025
64AQI
1st May 2025
73AQI
2nd May 2025
69AQI
3rd May 2025
80AQI
4th May 2025
55AQI
5th May 2025
73AQI
6th May 2025
82AQI
7th May 2025
84AQI
8th May 2025
71AQI
9th May 2025
69AQI
10th May 2025
64AQI
11th May 2025
66AQI
12th May 2025
71AQI
13th May 2025
69AQI
14th May 2025
64AQI
15th May 2025
62AQI
16th May 2025
63AQI
17th May 2025
73AQI
18th May 2025
70AQI
19th May 2025
62AQI
20th May 2025
60AQI
21st May 2025
48AQI
22nd May 2025
62AQI
23rd May 2025
50AQI
24th May 2025
70AQI
25th May 2025
84AQI
26th May 2025
68AQI
27th May 2025
67AQI
28th May 2025
61AQI
29th May 2025
61AQI
30th May 2025
72AQI
31st May 2025
73AQI
1st June 2025
64AQI
2nd June 2025
62AQI
3rd June 2025
60AQI
4th June 2025
70AQI
5th June 2025
56AQI
6th June 2025
67AQI
7th June 2025
65AQI
8th June 2025
68AQI
9th June 2025
60AQI
10th June 2025
59AQI
11th June 2025
38AQI
12th June 2025
49AQI
13th June 2025
38AQI
14th June 2025
49AQI
15th June 2025
40AQI
16th June 2025
47AQI
17th June 2025
56AQI
18th June 2025
56AQI
19th June 2025
53AQI
20th June 2025
49AQI
21st June 2025
60AQI
22nd June 2025
61AQI
23rd June 2025
56AQI
24th June 2025
58AQI
25th June 2025
58AQI
26th June 2025
60AQI
27th June 2025
59AQI
28th June 2025
55AQI
29th June 2025
48AQI
30th June 2025
43AQI
1st July 2025
46AQI
2nd July 2025
53AQI
3rd July 2025
52AQI
4th July 2025
53AQI
5th July 2025
48AQI
6th July 2025
43AQI
7th July 2025
38AQI
8th July 2025
42AQI
9th July 2025
45AQI
10th July 2025
52AQI
11th July 2025
44AQI
12th July 2025
47AQI
13th July 2025
53AQI
14th July 2025
59AQI
15th July 2025
63AQI
16th July 2025
62AQI
17th July 2025
62AQI
18th July 2025
56AQI
19th July 2025
47AQI
20th July 2025
46AQI
21st July 2025
41AQI
22nd July 2025
43AQI
23rd July 2025
39AQI
24th July 2025
40AQI
25th July 2025
39AQI
26th July 2025
41AQI
27th July 2025
41AQI
28th July 2025
38AQI
29th July 2025
38AQI
30th July 2025
38AQI
31st July 2025
50AQI
1st August 2025
54AQI
2nd August 2025
58AQI
3rd August 2025
60AQI
4th August 2025
60AQI
5th August 2025
50AQI
6th August 2025
54AQI
7th August 2025
57AQI
8th August 2025
61AQI
9th August 2025
63AQI
10th August 2025
64AQI
11th August 2025
62AQI
12th August 2025
58AQI
13th August 2025
48AQI
14th August 2025
42AQI
15th August 2025
39AQI
16th August 2025
43AQI
17th August 2025
48AQI
18th August 2025
45AQI
19th August 2025
47AQI
20th August 2025
50AQI

105AQI

97AQI

81AQI

80AQI

68AQI

55AQI

47AQI

53AQI

No. of days

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

202574AQI

13
17
1
16
12
1
26
4
27
3
2
29
9
21
21
10
9
11
42
153
36
1

Highest AQI recorded in

January

105AQI

Lowest AQI recorded in

July

47AQI

202466AQI

5
8
3
5
7
1
29
10
21
5
26
14
15
12
18
1
9
20
1
15
16
56
156
26
3

Highest AQI recorded in

January

120AQI

Lowest AQI recorded in

May

47AQI

202379AQI

3
2
24
5
2
27
5

Highest AQI recorded in

December

79AQI

Lowest AQI recorded in

November

71AQI

202267AQI

3
6
2
3
13
5
7
20
4
5
21
3
10
19
2
14
16
8
14
2
1
1
7
20
1
2
58
132
19

Highest AQI recorded in

February

79AQI

Lowest AQI recorded in

June

55AQI

202167AQI

11
8
1
12
12
19
12
23
8
9
21
14
7
2
1
20
8
13
15
2
78
104
33
3

Highest AQI recorded in

December

107AQI

Lowest AQI recorded in

August

44AQI

202065AQI

4
9
17
4
4
14
10
20
9
21
13
17
6
24
4
27
5
21
4
1
24
5
1
56
194
13
1

Highest AQI recorded in

April

84AQI

Lowest AQI recorded in

June

54AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2023(Avg.)
79AQI
Least Polluted Year Recorded
2020(Avg.)
65AQI

Sanmen Ring Supervision Station's annual 2025 AQI (74) shows an average percentage change of 8.4% (worsened AQI) compared to previous years: 2020 (65), 2021 (67), 2022 (67), 2023 (79), 2024 (66).