Hai Yu Sub Station, Changshu, Jiangsu, 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
Hai Yu Sub Station, Changshu, Jiangsu, China
2021
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
9th Aug 2021
130AQILowest AQI recorded on
3rd Aug 2021
32AQISame Day Analysis (1st August ):
On this day, AQI across the 3 years varied significantly: 2025 ranks 2nd highest AQI at 54 of Moderate air quality, showing improvement over 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 2nd Aug - 3rd Aug 2025
Hai Yu Sub Station, Changshu, Jiangsu, China
AQI
Day
Night
.
5 AM2nd Aug 2025
7 PM
4 AM3rd Aug 2025
Day time
Avg. Highest Time
12AMNaNth undefined
AQI
Avg. Lowest Time
12AMNaNth undefined
AQI
Night time
Avg. Highest Time
3PM2nd Aug
61AQI
Avg. Lowest Time
5PM2nd Aug
48AQI
In the last 24 hours,
Hai Yu Sub Station's AQI reached its highest point of 61 at 3 PM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 2nd Aug and 3rd Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Hai Yu Sub Station, Changshu, Jiangsu, China
JulAug
04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd
Day
Night
4th Jul 2025575 AMAQI
4th Jul 2025576 AMAQI
4th Jul 2025577 AMAQI
4th Jul 2025548 AMAQI
4th Jul 2025549 AMAQI
4th Jul 20255610 AMAQI
4th Jul 20256411 AMAQI
4th Jul 20257112 PMAQI
4th Jul 2025691 PMAQI
4th Jul 2025712 PMAQI
4th Jul 2025713 PMAQI
4th Jul 2025724 PMAQI
4th Jul 2025745 PMAQI
4th Jul 2025716 PMAQI
4th Jul 2025687 PMAQI
4th Jul 2025638 PMAQI
4th Jul 2025629 PMAQI
4th Jul 20256410 PMAQI
4th Jul 20256211 PMAQI
5th Jul 20256212 AMAQI
5th Jul 2025571 AMAQI
5th Jul 2025572 AMAQI
5th Jul 2025583 AMAQI
5th Jul 2025594 AMAQI
31°C25/37°C
5th Jul 2025585 AMAQI
5th Jul 2025596 AMAQI
5th Jul 2025597 AMAQI
5th Jul 2025688 AMAQI
5th Jul 2025759 AMAQI
5th Jul 20257410 AMAQI
5th Jul 20257911 AMAQI
5th Jul 20257412 PMAQI
5th Jul 2025751 PMAQI
5th Jul 2025742 PMAQI
5th Jul 2025783 PMAQI
5th Jul 2025744 PMAQI
5th Jul 2025705 PMAQI
5th Jul 2025636 PMAQI
5th Jul 2025617 PMAQI
5th Jul 2025628 PMAQI
5th Jul 2025619 PMAQI
5th Jul 20256210 PMAQI
5th Jul 20256011 PMAQI
6th Jul 20256012 AMAQI
6th Jul 2025591 AMAQI
6th Jul 2025582 AMAQI
6th Jul 2025613 AMAQI
6th Jul 2025634 AMAQI
32°C26/38°C
6th Jul 2025635 AMAQI
6th Jul 2025636 AMAQI
6th Jul 2025627 AMAQI
6th Jul 2025628 AMAQI
6th Jul 2025619 AMAQI
6th Jul 20256710 AMAQI
6th Jul 20257411 AMAQI
6th Jul 20256712 PMAQI
6th Jul 2025641 PMAQI
6th Jul 2025722 PMAQI
6th Jul 2025723 PMAQI
6th Jul 2025694 PMAQI
6th Jul 2025665 PMAQI
6th Jul 2025636 PMAQI
6th Jul 2025697 PMAQI
6th Jul 2025628 PMAQI
6th Jul 2025639 PMAQI
6th Jul 20256010 PMAQI
6th Jul 20255911 PMAQI
7th Jul 20255912 AMAQI
7th Jul 2025621 AMAQI
7th Jul 2025622 AMAQI
7th Jul 2025633 AMAQI
7th Jul 2025644 AMAQI
32°C27/38°C
7th Jul 2025645 AMAQI
7th Jul 2025656 AMAQI
7th Jul 2025647 AMAQI
7th Jul 2025548 AMAQI
7th Jul 2025559 AMAQI
7th Jul 20255410 AMAQI
7th Jul 20255411 AMAQI
7th Jul 20255212 PMAQI
7th Jul 2025431 PMAQI
7th Jul 2025432 PMAQI
7th Jul 2025423 PMAQI
7th Jul 2025404 PMAQI
7th Jul 2025425 PMAQI
7th Jul 2025466 PMAQI
7th Jul 2025487 PMAQI
7th Jul 2025538 PMAQI
7th Jul 2025539 PMAQI
7th Jul 20255310 PMAQI
7th Jul 20255311 PMAQI
8th Jul 20255312 AMAQI
8th Jul 2025621 AMAQI
8th Jul 2025642 AMAQI
8th Jul 2025623 AMAQI
8th Jul 2025604 AMAQI
30°C27/35°C
8th Jul 2025605 AMAQI
8th Jul 2025606 AMAQI
8th Jul 2025607 AMAQI
8th Jul 2025438 AMAQI
8th Jul 2025399 AMAQI
8th Jul 20253610 AMAQI
8th Jul 20253411 AMAQI
8th Jul 20254012 PMAQI
8th Jul 2025381 PMAQI
8th Jul 2025372 PMAQI
8th Jul 2025393 PMAQI
8th Jul 2025374 PMAQI
8th Jul 2025365 PMAQI
8th Jul 2025406 PMAQI
8th Jul 2025477 PMAQI
8th Jul 2025548 PMAQI
8th Jul 2025539 PMAQI
8th Jul 20255410 PMAQI
8th Jul 20255411 PMAQI
9th Jul 20255412 AMAQI
9th Jul 2025581 AMAQI
9th Jul 2025602 AMAQI
9th Jul 2025583 AMAQI
9th Jul 2025564 AMAQI
28°C26/32°C
9th Jul 2025575 AMAQI
9th Jul 2025566 AMAQI
9th Jul 2025567 AMAQI
9th Jul 2025438 AMAQI
9th Jul 2025409 AMAQI
9th Jul 20253910 AMAQI
9th Jul 20253911 AMAQI
9th Jul 20254012 PMAQI
9th Jul 2025441 PMAQI
9th Jul 2025442 PMAQI
9th Jul 2025423 PMAQI
9th Jul 2025424 PMAQI
9th Jul 2025405 PMAQI
9th Jul 2025366 PMAQI
9th Jul 2025447 PMAQI
9th Jul 2025528 PMAQI
9th Jul 2025559 PMAQI
9th Jul 20255510 PMAQI
9th Jul 20255611 PMAQI
10th Jul 20255612 AMAQI
10th Jul 2025561 AMAQI
10th Jul 2025572 AMAQI
10th Jul 2025563 AMAQI
10th Jul 2025554 AMAQI
29°C26/33°C
10th Jul 2025545 AMAQI
10th Jul 2025546 AMAQI
10th Jul 2025547 AMAQI
10th Jul 2025788 AMAQI
10th Jul 2025899 AMAQI
10th Jul 20258110 AMAQI
10th Jul 20258511 AMAQI
10th Jul 20258512 PMAQI
10th Jul 2025871 PMAQI
10th Jul 2025862 PMAQI
10th Jul 2025893 PMAQI
10th Jul 2025804 PMAQI
10th Jul 2025665 PMAQI
10th Jul 2025616 PMAQI
10th Jul 2025727 PMAQI
10th Jul 2025728 PMAQI
10th Jul 2025719 PMAQI
10th Jul 20257010 PMAQI
10th Jul 20256911 PMAQI
11th Jul 20256212 AMAQI
11th Jul 2025561 AMAQI
11th Jul 2025562 AMAQI
11th Jul 2025583 AMAQI
11th Jul 2025634 AMAQI
29°C25/33°C
11th Jul 2025635 AMAQI
11th Jul 2025626 AMAQI
11th Jul 2025627 AMAQI
11th Jul 2025648 AMAQI
11th Jul 2025619 AMAQI
11th Jul 20256210 AMAQI
11th Jul 20255611 AMAQI
11th Jul 20255812 PMAQI
11th Jul 2025571 PMAQI
11th Jul 2025532 PMAQI
11th Jul 2025483 PMAQI
11th Jul 2025424 PMAQI
11th Jul 2025425 PMAQI
11th Jul 2025406 PMAQI
11th Jul 2025467 PMAQI
11th Jul 2025568 PMAQI
11th Jul 2025569 PMAQI
11th Jul 20255610 PMAQI
11th Jul 20255611 PMAQI
12th Jul 20255912 AMAQI
12th Jul 2025591 AMAQI
12th Jul 2025602 AMAQI
12th Jul 2025603 AMAQI
12th Jul 2025604 AMAQI
27°C25/31°C
12th Jul 2025605 AMAQI
12th Jul 2025606 AMAQI
12th Jul 2025607 AMAQI
12th Jul 2025498 AMAQI
12th Jul 2025449 AMAQI
12th Jul 20254010 AMAQI
12th Jul 20254011 AMAQI
12th Jul 20253612 PMAQI
12th Jul 2025391 PMAQI
12th Jul 2025442 PMAQI
12th Jul 2025423 PMAQI
12th Jul 2025444 PMAQI
12th Jul 2025425 PMAQI
12th Jul 2025436 PMAQI
12th Jul 2025517 PMAQI
12th Jul 2025568 PMAQI
12th Jul 2025579 PMAQI
12th Jul 20255810 PMAQI
12th Jul 20256011 PMAQI
13th Jul 20256012 AMAQI
13th Jul 2025601 AMAQI
13th Jul 2025602 AMAQI
13th Jul 2025583 AMAQI
13th Jul 2025574 AMAQI
27°C25/31°C
13th Jul 2025575 AMAQI
13th Jul 2025576 AMAQI
13th Jul 2025577 AMAQI
13th Jul 2025588 AMAQI
13th Jul 2025589 AMAQI
13th Jul 20256110 AMAQI
13th Jul 20255211 AMAQI
13th Jul 20255112 PMAQI
13th Jul 2025521 PMAQI
13th Jul 2025522 PMAQI
13th Jul 2025523 PMAQI
13th Jul 2025594 PMAQI
13th Jul 2025635 PMAQI
13th Jul 2025646 PMAQI
13th Jul 2025647 PMAQI
13th Jul 2025658 PMAQI
13th Jul 2025669 PMAQI
13th Jul 20257210 PMAQI
13th Jul 20256811 PMAQI
14th Jul 20256612 AMAQI
14th Jul 2025581 AMAQI
14th Jul 2025582 AMAQI
14th Jul 2025583 AMAQI
14th Jul 2025584 AMAQI
28°C24/32°C
14th Jul 2025585 AMAQI
14th Jul 2025576 AMAQI
14th Jul 2025587 AMAQI
14th Jul 2025668 AMAQI
14th Jul 2025699 AMAQI
14th Jul 20256910 AMAQI
14th Jul 20257211 AMAQI
14th Jul 20257012 PMAQI
14th Jul 2025701 PMAQI
14th Jul 2025712 PMAQI
14th Jul 2025643 PMAQI
14th Jul 2025604 PMAQI
14th Jul 2025565 PMAQI
14th Jul 2025536 PMAQI
14th Jul 2025547 PMAQI
14th Jul 2025558 PMAQI
14th Jul 2025569 PMAQI
14th Jul 20255610 PMAQI
14th Jul 20255611 PMAQI
15th Jul 20255712 AMAQI
15th Jul 2025581 AMAQI
15th Jul 2025592 AMAQI
15th Jul 2025603 AMAQI
15th Jul 2025624 AMAQI
28°C24/34°C
15th Jul 2025625 AMAQI
15th Jul 2025626 AMAQI
15th Jul 2025627 AMAQI
15th Jul 2025668 AMAQI
15th Jul 2025649 AMAQI
15th Jul 20256010 AMAQI
15th Jul 20256011 AMAQI
15th Jul 20256412 PMAQI
15th Jul 2025701 PMAQI
15th Jul 2025712 PMAQI
15th Jul 2025783 PMAQI
15th Jul 2025774 PMAQI
15th Jul 2025725 PMAQI
15th Jul 2025736 PMAQI
15th Jul 2025707 PMAQI
15th Jul 2025668 PMAQI
15th Jul 2025689 PMAQI
15th Jul 20256710 PMAQI
15th Jul 20256711 PMAQI
16th Jul 20256612 AMAQI
16th Jul 2025601 AMAQI
16th Jul 2025602 AMAQI
16th Jul 2025613 AMAQI
16th Jul 2025614 AMAQI
29°C24/35°C
16th Jul 2025615 AMAQI
16th Jul 2025616 AMAQI
16th Jul 2025617 AMAQI
16th Jul 2025828 AMAQI
16th Jul 2025809 AMAQI
16th Jul 20257610 AMAQI
16th Jul 20257211 AMAQI
16th Jul 20256712 PMAQI
16th Jul 2025701 PMAQI
16th Jul 2025682 PMAQI
16th Jul 2025663 PMAQI
16th Jul 2025664 PMAQI
16th Jul 2025665 PMAQI
16th Jul 2025646 PMAQI
16th Jul 2025647 PMAQI
16th Jul 2025628 PMAQI
16th Jul 2025649 PMAQI
16th Jul 20256610 PMAQI
16th Jul 20256611 PMAQI
17th Jul 20256512 AMAQI
17th Jul 2025611 AMAQI
17th Jul 2025602 AMAQI
17th Jul 2025633 AMAQI
17th Jul 2025644 AMAQI
30°C26/35°C
17th Jul 2025645 AMAQI
17th Jul 2025656 AMAQI
17th Jul 2025657 AMAQI
17th Jul 2025558 AMAQI
17th Jul 2025569 AMAQI
17th Jul 20256210 AMAQI
17th Jul 20256811 AMAQI
17th Jul 20257112 PMAQI
17th Jul 2025731 PMAQI
17th Jul 2025702 PMAQI
17th Jul 2025723 PMAQI
17th Jul 2025674 PMAQI
17th Jul 2025605 PMAQI
17th Jul 2025626 PMAQI
17th Jul 2025607 PMAQI
17th Jul 2025628 PMAQI
17th Jul 2025609 PMAQI
17th Jul 20256010 PMAQI
17th Jul 20256111 PMAQI
18th Jul 20256012 AMAQI
18th Jul 2025641 AMAQI
18th Jul 2025642 AMAQI
18th Jul 2025643 AMAQI
18th Jul 2025664 AMAQI
30°C25/34°C
18th Jul 2025665 AMAQI
18th Jul 2025656 AMAQI
18th Jul 2025667 AMAQI
18th Jul 2025618 AMAQI
18th Jul 2025609 AMAQI
18th Jul 20255910 AMAQI
18th Jul 20255811 AMAQI
18th Jul 20255712 PMAQI
18th Jul 2025581 PMAQI
18th Jul 2025572 PMAQI
18th Jul 2025583 PMAQI
18th Jul 2025584 PMAQI
18th Jul 2025595 PMAQI
18th Jul 2025586 PMAQI
18th Jul 2025567 PMAQI
18th Jul 2025588 PMAQI
18th Jul 2025589 PMAQI
18th Jul 20255810 PMAQI
18th Jul 20255811 PMAQI
19th Jul 20255812 AMAQI
19th Jul 2025621 AMAQI
19th Jul 2025642 AMAQI
19th Jul 2025643 AMAQI
19th Jul 2025634 AMAQI
28°C25/32°C
19th Jul 2025635 AMAQI
19th Jul 2025646 AMAQI
19th Jul 2025637 AMAQI
19th Jul 2025508 AMAQI
19th Jul 2025449 AMAQI
19th Jul 20253210 AMAQI
19th Jul 20253811 AMAQI
19th Jul 20254412 PMAQI
19th Jul 2025401 PMAQI
19th Jul 2025352 PMAQI
19th Jul 2025343 PMAQI
19th Jul 2025344 PMAQI
19th Jul 2025395 PMAQI
19th Jul 2025436 PMAQI
19th Jul 2025457 PMAQI
19th Jul 2025568 PMAQI
19th Jul 2025569 PMAQI
19th Jul 20255510 PMAQI
19th Jul 20255411 PMAQI
20th Jul 20255612 AMAQI
20th Jul 2025611 AMAQI
20th Jul 2025622 AMAQI
20th Jul 2025593 AMAQI
20th Jul 2025584 AMAQI
29°C25/34°C
20th Jul 2025585 AMAQI
20th Jul 2025586 AMAQI
20th Jul 2025587 AMAQI
20th Jul 2025458 AMAQI
20th Jul 2025369 AMAQI
20th Jul 20254010 AMAQI
20th Jul 20254111 AMAQI
20th Jul 20254112 PMAQI
20th Jul 2025351 PMAQI
20th Jul 2025352 PMAQI
20th Jul 2025343 PMAQI
20th Jul 2025324 PMAQI
20th Jul 2025305 PMAQI
20th Jul 2025306 PMAQI
20th Jul 2025397 PMAQI
20th Jul 2025528 PMAQI
20th Jul 2025529 PMAQI
20th Jul 20255210 PMAQI
20th Jul 20255211 PMAQI
21st Jul 20255312 AMAQI
21st Jul 2025581 AMAQI
21st Jul 2025582 AMAQI
21st Jul 2025573 AMAQI
21st Jul 2025564 AMAQI
30°C27/34°C
21st Jul 2025555 AMAQI
21st Jul 2025566 AMAQI
21st Jul 2025567 AMAQI
21st Jul 2025428 AMAQI
21st Jul 2025349 AMAQI
21st Jul 20253210 AMAQI
21st Jul 20253011 AMAQI
21st Jul 20252912 PMAQI
21st Jul 2025301 PMAQI
21st Jul 2025312 PMAQI
21st Jul 2025293 PMAQI
21st Jul 2025344 PMAQI
21st Jul 2025305 PMAQI
21st Jul 2025286 PMAQI
21st Jul 2025387 PMAQI
21st Jul 2025468 PMAQI
21st Jul 2025519 PMAQI
21st Jul 20255010 PMAQI
21st Jul 20255211 PMAQI
22nd Jul 20255012 AMAQI
22nd Jul 2025561 AMAQI
22nd Jul 2025562 AMAQI
22nd Jul 2025553 AMAQI
22nd Jul 2025534 AMAQI
30°C27/33°C
22nd Jul 2025545 AMAQI
22nd Jul 2025536 AMAQI
22nd Jul 2025537 AMAQI
22nd Jul 2025378 AMAQI
22nd Jul 2025369 AMAQI
22nd Jul 20253410 AMAQI
22nd Jul 20253611 AMAQI
22nd Jul 20253612 PMAQI
22nd Jul 2025381 PMAQI
22nd Jul 2025392 PMAQI
22nd Jul 2025343 PMAQI
22nd Jul 2025384 PMAQI
22nd Jul 2025375 PMAQI
22nd Jul 2025326 PMAQI
22nd Jul 2025437 PMAQI
22nd Jul 2025508 PMAQI
22nd Jul 2025509 PMAQI
22nd Jul 20255010 PMAQI
22nd Jul 20255011 PMAQI
23rd Jul 20255012 AMAQI
23rd Jul 2025541 AMAQI
23rd Jul 2025532 AMAQI
23rd Jul 2025533 AMAQI
23rd Jul 2025524 AMAQI
29°C27/33°C
23rd Jul 2025525 AMAQI
23rd Jul 2025526 AMAQI
23rd Jul 2025527 AMAQI
23rd Jul 2025448 AMAQI
23rd Jul 2025429 AMAQI
23rd Jul 20253410 AMAQI
23rd Jul 20253111 AMAQI
23rd Jul 20253012 PMAQI
23rd Jul 2025321 PMAQI
23rd Jul 2025362 PMAQI
23rd Jul 2025353 PMAQI
23rd Jul 2025374 PMAQI
23rd Jul 2025405 PMAQI
23rd Jul 2025366 PMAQI
23rd Jul 2025387 PMAQI
23rd Jul 2025498 PMAQI
23rd Jul 2025489 PMAQI
23rd Jul 20254610 PMAQI
23rd Jul 20254711 PMAQI
24th Jul 20254412 AMAQI
24th Jul 2025511 AMAQI
24th Jul 2025522 AMAQI
24th Jul 2025523 AMAQI
24th Jul 2025504 AMAQI
29°C25/33°C
24th Jul 2025505 AMAQI
24th Jul 2025506 AMAQI
24th Jul 2025507 AMAQI
24th Jul 2025488 AMAQI
24th Jul 2025469 AMAQI
24th Jul 20254610 AMAQI
24th Jul 20254311 AMAQI
24th Jul 20254212 PMAQI
24th Jul 2025441 PMAQI
24th Jul 2025442 PMAQI
24th Jul 2025463 PMAQI
24th Jul 2025474 PMAQI
24th Jul 2025485 PMAQI
24th Jul 2025486 PMAQI
24th Jul 2025507 PMAQI
24th Jul 2025528 PMAQI
24th Jul 2025539 PMAQI
24th Jul 20255510 PMAQI
24th Jul 20255311 PMAQI
25th Jul 20255212 AMAQI
25th Jul 2025501 AMAQI
25th Jul 2025502 AMAQI
25th Jul 2025503 AMAQI
25th Jul 2025524 AMAQI
28°C25/32°C
25th Jul 2025525 AMAQI
25th Jul 2025516 AMAQI
25th Jul 2025527 AMAQI
25th Jul 2025498 AMAQI
25th Jul 2025489 AMAQI
25th Jul 20254810 AMAQI
25th Jul 20255111 AMAQI
25th Jul 20254712 PMAQI
25th Jul 2025451 PMAQI
25th Jul 2025442 PMAQI
25th Jul 2025463 PMAQI
25th Jul 2025464 PMAQI
25th Jul 2025485 PMAQI
25th Jul 2025506 PMAQI
25th Jul 2025457 PMAQI
25th Jul 2025468 PMAQI
25th Jul 2025479 PMAQI
25th Jul 20254810 PMAQI
25th Jul 20254811 PMAQI
26th Jul 20254812 AMAQI
26th Jul 2025521 AMAQI
26th Jul 2025522 AMAQI
26th Jul 2025523 AMAQI
26th Jul 2025524 AMAQI
28°C25/32°C
26th Jul 2025505 AMAQI
26th Jul 2025516 AMAQI
26th Jul 2025517 AMAQI
26th Jul 2025398 AMAQI
26th Jul 2025379 AMAQI
26th Jul 20253710 AMAQI
26th Jul 20253811 AMAQI
26th Jul 20253812 PMAQI
26th Jul 2025371 PMAQI
26th Jul 2025392 PMAQI
26th Jul 2025373 PMAQI
26th Jul 2025354 PMAQI
26th Jul 2025305 PMAQI
26th Jul 2025326 PMAQI
26th Jul 2025427 PMAQI
26th Jul 2025468 PMAQI
26th Jul 2025469 PMAQI
26th Jul 20254610 PMAQI
26th Jul 20254411 PMAQI
27th Jul 20254412 AMAQI
27th Jul 2025511 AMAQI
27th Jul 2025512 AMAQI
27th Jul 2025513 AMAQI
27th Jul 2025494 AMAQI
28°C26/32°C
27th Jul 2025495 AMAQI
27th Jul 2025506 AMAQI
27th Jul 2025497 AMAQI
27th Jul 2025468 AMAQI
27th Jul 2025429 AMAQI
27th Jul 20254210 AMAQI
27th Jul 20253911 AMAQI
27th Jul 20253512 PMAQI
27th Jul 2025301 PMAQI
27th Jul 2025402 PMAQI
27th Jul 2025363 PMAQI
27th Jul 2025364 PMAQI
27th Jul 2025405 PMAQI
27th Jul 2025366 PMAQI
27th Jul 2025407 PMAQI
27th Jul 2025438 PMAQI
27th Jul 2025449 PMAQI
27th Jul 20254310 PMAQI
27th Jul 20254311 PMAQI
28th Jul 20254212 AMAQI
28th Jul 2025481 AMAQI
28th Jul 2025492 AMAQI
28th Jul 2025483 AMAQI
28th Jul 2025484 AMAQI
28°C26/32°C
28th Jul 2025475 AMAQI
28th Jul 2025476 AMAQI
28th Jul 2025477 AMAQI
28th Jul 2025418 AMAQI
28th Jul 2025429 AMAQI
28th Jul 20253910 AMAQI
28th Jul 20254111 AMAQI
28th Jul 20253612 PMAQI
28th Jul 2025321 PMAQI
28th Jul 2025322 PMAQI
28th Jul 2025383 PMAQI
28th Jul 2025394 PMAQI
28th Jul 2025425 PMAQI
28th Jul 2025386 PMAQI
28th Jul 2025427 PMAQI
28th Jul 2025448 PMAQI
28th Jul 2025469 PMAQI
28th Jul 20254510 PMAQI
28th Jul 20254411 PMAQI
29th Jul 20254312 AMAQI
29th Jul 2025471 AMAQI
29th Jul 2025482 AMAQI
29th Jul 2025463 AMAQI
29th Jul 2025464 AMAQI
28°C25/31°C
29th Jul 2025465 AMAQI
29th Jul 2025456 AMAQI
29th Jul 2025457 AMAQI
29th Jul 2025398 AMAQI
29th Jul 2025409 AMAQI
29th Jul 20253610 AMAQI
29th Jul 20253811 AMAQI
29th Jul 20253612 PMAQI
29th Jul 2025361 PMAQI
29th Jul 2025362 PMAQI
29th Jul 2025383 PMAQI
29th Jul 2025374 PMAQI
29th Jul 2025375 PMAQI
29th Jul 2025356 PMAQI
29th Jul 2025397 PMAQI
29th Jul 2025418 PMAQI
29th Jul 2025449 PMAQI
29th Jul 20254310 PMAQI
29th Jul 20254411 PMAQI
30th Jul 20254412 AMAQI
30th Jul 2025461 AMAQI
30th Jul 2025472 AMAQI
30th Jul 2025473 AMAQI
30th Jul 2025444 AMAQI
28°C24/32°C
30th Jul 2025445 AMAQI
30th Jul 2025446 AMAQI
30th Jul 2025447 AMAQI
30th Jul 2025368 AMAQI
30th Jul 2025339 AMAQI
30th Jul 20253110 AMAQI
30th Jul 20252211 AMAQI
30th Jul 20252512 PMAQI
30th Jul 2025271 PMAQI
30th Jul 2025222 PMAQI
30th Jul 2025213 PMAQI
30th Jul 2025234 PMAQI
30th Jul 2025285 PMAQI
30th Jul 2025266 PMAQI
30th Jul 2025327 PMAQI
30th Jul 2025398 PMAQI
30th Jul 2025419 PMAQI
30th Jul 20253810 PMAQI
30th Jul 20253911 PMAQI
31st Jul 20254012 AMAQI
31st Jul 2025431 AMAQI
31st Jul 2025452 AMAQI
31st Jul 2025463 AMAQI
31st Jul 2025474 AMAQI
25°C23/26°C
31st Jul 2025475 AMAQI
31st Jul 2025476 AMAQI
31st Jul 2025477 AMAQI
31st Jul 2025478 AMAQI
31st Jul 2025479 AMAQI
31st Jul 20252910 AMAQI
31st Jul 20252611 AMAQI
31st Jul 20253212 PMAQI
31st Jul 2025321 PMAQI
31st Jul 2025352 PMAQI
31st Jul 2025373 PMAQI
31st Jul 2025424 PMAQI
31st Jul 2025415 PMAQI
31st Jul 2025406 PMAQI
31st Jul 2025477 PMAQI
31st Jul 2025538 PMAQI
31st Jul 2025549 PMAQI
31st Jul 20255410 PMAQI
31st Jul 20255511 PMAQI
1st Aug 20255312 AMAQI
1st Aug 2025481 AMAQI
1st Aug 2025492 AMAQI
1st Aug 2025463 AMAQI
1st Aug 2025434 AMAQI
25°C23/29°C
1st Aug 2025445 AMAQI
1st Aug 2025486 AMAQI
1st Aug 2025497 AMAQI
1st Aug 2025618 AMAQI
1st Aug 2025689 AMAQI
1st Aug 20256610 AMAQI
1st Aug 20256411 AMAQI
1st Aug 20256912 PMAQI
1st Aug 2025611 PMAQI
1st Aug 2025562 PMAQI
1st Aug 2025563 PMAQI
1st Aug 2025524 PMAQI
1st Aug 2025545 PMAQI
1st Aug 2025566 PMAQI
1st Aug 2025547 PMAQI
1st Aug 2025548 PMAQI
1st Aug 2025569 PMAQI
1st Aug 20255410 PMAQI
1st Aug 20255411 PMAQI
2nd Aug 20255212 AMAQI
2nd Aug 2025501 AMAQI
2nd Aug 2025502 AMAQI
2nd Aug 2025513 AMAQI
2nd Aug 2025524 AMAQI
28°C25/33°C
2nd Aug 2025535 AMAQI
2nd Aug 2025546 AMAQI
2nd Aug 2025547 AMAQI
2nd Aug 2025608 AMAQI
2nd Aug 2025549 AMAQI
2nd Aug 20255510 AMAQI
2nd Aug 20255111 AMAQI
2nd Aug 20255612 PMAQI
2nd Aug 2025561 PMAQI
2nd Aug 2025572 PMAQI
2nd Aug 2025613 PMAQI
2nd Aug 2025554 PMAQI
2nd Aug 2025485 PMAQI
2nd Aug 2025546 PMAQI
2nd Aug 2025547 PMAQI
2nd Aug 2025548 PMAQI
2nd Aug 2025549 PMAQI
2nd Aug 20255310 PMAQI
2nd Aug 20255411 PMAQI
3rd Aug 20255412 AMAQI
3rd Aug 2025521 AMAQI
--°C/°C
5 AM
12 PM
7 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 7 AM
56AQI
3 hours / Day
90 hours / Month
Avg. Lowest Time
8 AM - 6 PM
50AQI
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. 56), while the lowest AQI was between 8 AM to 6 PM (Avg. 50).
Night time
Avg. Highest Time
12 AM - 11 PM
55AQI
9 hours / Day
270 hours / Month
Avg. Lowest Time
12 AM - 11 PM
55AQI
9 hours / Day
270 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 55), while the lowest AQI was between 12 AM to 11 PM (Avg. 55).
2025 Days Vs Air Quality
Hai Yu Sub Station, Changshu, Jiangsu, China
2025
9%
20
65%
138
23%
49
3%
6
Total number of days with different AQI categories in last 214 days in 2025 (151 days remaining)
Good
20 DaysModerate
138 DaysPoor
49 DaysUnhealthy
6 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 9%
Health Risk Level:
Extreme
In 2025, 9% of 214 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
Hai Yu Sub Station, Changshu, Jiangsu, 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
119AQI
119AQI
2nd January 2025
95AQI
95AQI
3rd January 2025
108AQI
108AQI
4th January 2025
89AQI
89AQI
5th January 2025
144AQI
144AQI
6th January 2025
126AQI
126AQI
7th January 2025
122AQI
122AQI
8th January 2025
127AQI
127AQI
9th January 2025
72AQI
72AQI
10th January 2025
88AQI
88AQI
11th January 2025
110AQI
110AQI
12th January 2025
115AQI
115AQI
13th January 2025
139AQI
139AQI
14th January 2025
152AQI
152AQI
15th January 2025
85AQI
85AQI
16th January 2025
115AQI
115AQI
17th January 2025
117AQI
117AQI
18th January 2025
129AQI
129AQI
19th January 2025
148AQI
148AQI
20th January 2025
172AQI
172AQI
21st January 2025
166AQI
166AQI
22nd January 2025
118AQI
118AQI
23rd January 2025
104AQI
104AQI
24th January 2025
86AQI
86AQI
25th January 2025
70AQI
70AQI
26th January 2025
86AQI
86AQI
27th January 2025
67AQI
67AQI
28th January 2025
82AQI
82AQI
29th January 2025
113AQI
113AQI
30th January 2025
96AQI
96AQI
31st January 2025
101AQI
101AQI
1st February 2025
64AQI
64AQI
2nd February 2025
111AQI
111AQI
3rd February 2025
105AQI
105AQI
4th February 2025
124AQI
124AQI
5th February 2025
104AQI
104AQI
6th February 2025
84AQI
84AQI
7th February 2025
75AQI
75AQI
8th February 2025
65AQI
65AQI
9th February 2025
81AQI
81AQI
10th February 2025
93AQI
93AQI
11th February 2025
71AQI
71AQI
12th February 2025
137AQI
137AQI
13th February 2025
78AQI
78AQI
14th February 2025
96AQI
96AQI
15th February 2025
79AQI
79AQI
16th February 2025
139AQI
139AQI
17th February 2025
82AQI
82AQI
18th February 2025
96AQI
96AQI
19th February 2025
82AQI
82AQI
20th February 2025
68AQI
68AQI
21st February 2025
71AQI
71AQI
22nd February 2025
99AQI
99AQI
23rd February 2025
105AQI
105AQI
24th February 2025
122AQI
122AQI
25th February 2025
146AQI
146AQI
26th February 2025
152AQI
152AQI
27th February 2025
162AQI
162AQI
28th February 2025
124AQI
124AQI
1st March 2025
116AQI
116AQI
2nd March 2025
112AQI
112AQI
3rd March 2025
67AQI
67AQI
4th March 2025
66AQI
66AQI
5th March 2025
60AQI
60AQI
6th March 2025
76AQI
76AQI
7th March 2025
84AQI
84AQI
8th March 2025
124AQI
124AQI
9th March 2025
85AQI
85AQI
10th March 2025
107AQI
107AQI
11th March 2025
105AQI
105AQI
12th March 2025
78AQI
78AQI
13th March 2025
79AQI
79AQI
14th March 2025
65AQI
65AQI
15th March 2025
64AQI
64AQI
16th March 2025
77AQI
77AQI
17th March 2025
76AQI
76AQI
18th March 2025
67AQI
67AQI
19th March 2025
86AQI
86AQI
20th March 2025
105AQI
105AQI
21st March 2025
92AQI
92AQI
22nd March 2025
96AQI
96AQI
23rd March 2025
102AQI
102AQI
24th March 2025
102AQI
102AQI
25th March 2025
110AQI
110AQI
26th March 2025
127AQI
127AQI
27th March 2025
106AQI
106AQI
28th March 2025
90AQI
90AQI
29th March 2025
100AQI
100AQI
30th March 2025
72AQI
72AQI
31st March 2025
74AQI
74AQI
1st April 2025
77AQI
77AQI
2nd April 2025
109AQI
109AQI
3rd April 2025
81AQI
81AQI
4th April 2025
90AQI
90AQI
5th April 2025
111AQI
111AQI
6th April 2025
109AQI
109AQI
7th April 2025
107AQI
107AQI
8th April 2025
112AQI
112AQI
9th April 2025
134AQI
134AQI
10th April 2025
121AQI
121AQI
11th April 2025
131AQI
131AQI
12th April 2025
157AQI
157AQI
13th April 2025
100AQI
100AQI
14th April 2025
83AQI
83AQI
15th April 2025
80AQI
80AQI
16th April 2025
79AQI
79AQI
17th April 2025
89AQI
89AQI
18th April 2025
98AQI
98AQI
19th April 2025
105AQI
105AQI
20th April 2025
77AQI
77AQI
21st April 2025
86AQI
86AQI
22nd April 2025
84AQI
84AQI
23rd April 2025
94AQI
94AQI
24th April 2025
112AQI
112AQI
25th April 2025
73AQI
73AQI
26th April 2025
73AQI
73AQI
27th April 2025
75AQI
75AQI
28th April 2025
78AQI
78AQI
29th April 2025
78AQI
78AQI
30th April 2025
85AQI
85AQI
1st May 2025
79AQI
79AQI
2nd May 2025
81AQI
81AQI
3rd May 2025
75AQI
75AQI
4th May 2025
58AQI
58AQI
5th May 2025
76AQI
76AQI
6th May 2025
97AQI
97AQI
7th May 2025
86AQI
86AQI
8th May 2025
73AQI
73AQI
9th May 2025
57AQI
57AQI
10th May 2025
67AQI
67AQI
11th May 2025
72AQI
72AQI
12th May 2025
78AQI
78AQI
13th May 2025
77AQI
77AQI
14th May 2025
80AQI
80AQI
15th May 2025
115AQI
115AQI
16th May 2025
71AQI
71AQI
17th May 2025
89AQI
89AQI
18th May 2025
74AQI
74AQI
19th May 2025
87AQI
87AQI
20th May 2025
80AQI
80AQI
21st May 2025
61AQI
61AQI
22nd May 2025
85AQI
85AQI
23rd May 2025
53AQI
53AQI
24th May 2025
90AQI
90AQI
25th May 2025
77AQI
77AQI
26th May 2025
82AQI
82AQI
27th May 2025
69AQI
69AQI
28th May 2025
72AQI
72AQI
29th May 2025
78AQI
78AQI
30th May 2025
88AQI
88AQI
31st May 2025
91AQI
91AQI
1st June 2025
61AQI
61AQI
2nd June 2025
49AQI
49AQI
3rd June 2025
79AQI
79AQI
4th June 2025
99AQI
99AQI
5th June 2025
77AQI
77AQI
6th June 2025
77AQI
77AQI
7th June 2025
76AQI
76AQI
8th June 2025
47AQI
47AQI
9th June 2025
64AQI
64AQI
10th June 2025
57AQI
57AQI
11th June 2025
61AQI
61AQI
12th June 2025
57AQI
57AQI
13th June 2025
45AQI
45AQI
14th June 2025
62AQI
62AQI
15th June 2025
51AQI
51AQI
16th June 2025
56AQI
56AQI
17th June 2025
64AQI
64AQI
18th June 2025
65AQI
65AQI
19th June 2025
62AQI
62AQI
20th June 2025
58AQI
58AQI
21st June 2025
53AQI
53AQI
22nd June 2025
42AQI
42AQI
23rd June 2025
45AQI
45AQI
24th June 2025
47AQI
47AQI
25th June 2025
57AQI
57AQI
26th June 2025
58AQI
58AQI
27th June 2025
55AQI
55AQI
28th June 2025
53AQI
53AQI
29th June 2025
55AQI
55AQI
30th June 2025
55AQI
55AQI
1st July 2025
52AQI
52AQI
2nd July 2025
56AQI
56AQI
3rd July 2025
57AQI
57AQI
4th July 2025
61AQI
61AQI
5th July 2025
64AQI
64AQI
6th July 2025
63AQI
63AQI
7th July 2025
55AQI
55AQI
8th July 2025
50AQI
50AQI
9th July 2025
50AQI
50AQI
10th July 2025
66AQI
66AQI
11th July 2025
57AQI
57AQI
12th July 2025
53AQI
53AQI
13th July 2025
60AQI
60AQI
14th July 2025
61AQI
61AQI
15th July 2025
64AQI
64AQI
16th July 2025
65AQI
65AQI
17th July 2025
64AQI
64AQI
18th July 2025
60AQI
60AQI
19th July 2025
51AQI
51AQI
20th July 2025
47AQI
47AQI
21st July 2025
44AQI
44AQI
22nd July 2025
46AQI
46AQI
23rd July 2025
44AQI
44AQI
24th July 2025
49AQI
49AQI
25th July 2025
49AQI
49AQI
26th July 2025
44AQI
44AQI
27th July 2025
43AQI
43AQI
28th July 2025
43AQI
43AQI
29th July 2025
41AQI
41AQI
30th July 2025
36AQI
36AQI
31st July 2025
44AQI
44AQI
1st August 2025
54AQI
54AQI
112AQI
101AQI
89AQI
96AQI
78AQI
60AQI
53AQI
54AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202584AQI
11
17
3
16
10
2
20
11
19
10
1
30
1
6
24
14
17
1
20
138
49
6
Highest AQI recorded in
January112AQI
Lowest AQI recorded in
July53AQI
202474AQI
16
1
1
3
9
30
9
22
3
28
14
15
12
16
3
8
18
4
9
21
1
49
147
28
19
Highest AQI recorded in
March158AQI
Lowest AQI recorded in
July51AQI
2023156AQI
3
31
34
Highest AQI recorded in
November156AQI
Lowest AQI recorded in
December156AQI
202184AQI
8
13
10
1
16
9
2
14
15
1
1
23
6
1
2
22
5
2
5
25
12
18
7
11
3
9
20
1
11
18
1
1
4
15
10
1
6
11
3
51
196
74
21
1
Highest AQI recorded in
January120AQI
Lowest AQI recorded in
July54AQI
202082AQI
4
7
2
2
6
12
1
1
8
9
6
22
2
6
24
1
5
25
1
3
21
6
3
26
2
4
19
4
3
9
13
8
1
34
167
52
12
1
Highest AQI recorded in
December129AQI
Lowest AQI recorded in
August64AQI
Most & Least Polluted Years Over the Last 5 Years
Most Polluted Year Recorded
2023(Avg.)
156AQILeast Polluted Year Recorded
2024(Avg.)
74AQIHai Yu Sub Station's annual 2025 AQI (84) shows an average percentage change of -7.8% (improved AQI) compared to previous years: 2020 (82), 2021 (84), 2023 (156), 2024 (74).
