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Overseas School of Colombo Sensor 1, Sri Jayewardenepura Kotte, Western, Sri Lanka 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

Overseas School of Colombo Sensor 1, Sri Jayewardenepura Kotte, Western, Sri Lanka

2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
2nd Aug 2025
74AQI
Lowest AQI recorded on
15th Aug 2024
40AQI

Same Day Analysis (20th August ):
On this day, AQI across the 2 years varied significantly: 2025 ranks 1st highest AQI at 62 of Moderate air quality on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 21st Aug - 22nd Aug 2025

Overseas School of Colombo Sensor 1, Sri Jayewardenepura Kotte, Western, Sri Lanka

AQI
Day
Night
.

6 AM21st Aug 2025

6 PM

5 AM22nd Aug 2025

Day time
Avg. Highest Time
12AMNaNth undefined

AQI

Avg. Lowest Time
12AMNaNth undefined

AQI

Night time
Avg. Highest Time
9AM21st Aug

81AQI

Avg. Lowest Time
2PM21st Aug

58AQI

In the last 24 hours,

Overseas School of Colombo Sensor 1's AQI reached its highest point of 81 at 9 AM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 21st Aug and 22nd Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Overseas School of Colombo Sensor 1, Sri Jayewardenepura Kotte, Western, Sri Lanka

JulAug
23rd - 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 - 22nd22nd
Day
Night
23rd Jul 2025446 AMAQI
23rd Jul 2025527 AMAQI
23rd Jul 2025498 AMAQI
23rd Jul 2025429 AMAQI
23rd Jul 20252910 AMAQI
23rd Jul 20254211 AMAQI
23rd Jul 20254012 PMAQI
23rd Jul 2025421 PMAQI
23rd Jul 2025482 PMAQI
23rd Jul 2025473 PMAQI
23rd Jul 2025464 PMAQI
23rd Jul 2025435 PMAQI
23rd Jul 2025506 PMAQI
23rd Jul 2025517 PMAQI
23rd Jul 2025508 PMAQI
23rd Jul 2025449 PMAQI
23rd Jul 20253810 PMAQI
23rd Jul 20255111 PMAQI
24th Jul 20255012 AMAQI
24th Jul 2025561 AMAQI
24th Jul 2025532 AMAQI
24th Jul 2025533 AMAQI
24th Jul 2025534 AMAQI
24th Jul 2025505 AMAQI

25°C25/27°C

24th Jul 2025446 AMAQI
24th Jul 2025567 AMAQI
24th Jul 2025548 AMAQI
24th Jul 2025479 AMAQI
24th Jul 20254610 AMAQI
24th Jul 20254011 AMAQI
24th Jul 20254712 PMAQI
24th Jul 2025361 PMAQI
24th Jul 2025372 PMAQI
24th Jul 2025423 PMAQI
24th Jul 2025464 PMAQI
24th Jul 2025465 PMAQI
24th Jul 2025536 PMAQI
24th Jul 2025527 PMAQI
24th Jul 2025418 PMAQI
24th Jul 2025589 PMAQI
24th Jul 20255510 PMAQI
24th Jul 20255411 PMAQI
25th Jul 20255212 AMAQI
25th Jul 2025541 AMAQI
25th Jul 2025552 AMAQI
25th Jul 2025543 AMAQI
25th Jul 2025544 AMAQI
25th Jul 2025575 AMAQI

26°C25/28°C

25th Jul 2025616 AMAQI
25th Jul 2025687 AMAQI
25th Jul 2025718 AMAQI
25th Jul 2025589 AMAQI
25th Jul 20256010 AMAQI
25th Jul 20255711 AMAQI
25th Jul 20255412 PMAQI
25th Jul 2025521 PMAQI
25th Jul 2025382 PMAQI
25th Jul 2025443 PMAQI
25th Jul 2025544 PMAQI
25th Jul 2025515 PMAQI
25th Jul 2025416 PMAQI
25th Jul 2025587 PMAQI
25th Jul 2025428 PMAQI
25th Jul 2025449 PMAQI
25th Jul 20253610 PMAQI
25th Jul 20253611 PMAQI
26th Jul 20254412 AMAQI
26th Jul 2025561 AMAQI
26th Jul 2025592 AMAQI
26th Jul 2025603 AMAQI
26th Jul 2025584 AMAQI
26th Jul 2025585 AMAQI

26°C25/28°C

26th Jul 2025546 AMAQI
26th Jul 2025607 AMAQI
26th Jul 2025578 AMAQI
26th Jul 2025529 AMAQI
26th Jul 20255610 AMAQI
26th Jul 20255911 AMAQI
26th Jul 20255212 PMAQI
26th Jul 2025501 PMAQI
26th Jul 2025402 PMAQI
26th Jul 2025463 PMAQI
26th Jul 2025454 PMAQI
26th Jul 2025425 PMAQI
26th Jul 2025416 PMAQI
26th Jul 2025517 PMAQI
26th Jul 2025538 PMAQI
26th Jul 2025499 PMAQI
26th Jul 20254410 PMAQI
26th Jul 20254911 PMAQI
27th Jul 20255612 AMAQI
27th Jul 2025551 AMAQI
27th Jul 2025572 AMAQI
27th Jul 2025563 AMAQI
27th Jul 2025594 AMAQI
27th Jul 2025565 AMAQI

24°C23/25°C

27th Jul 2025536 AMAQI
27th Jul 2025607 AMAQI
27th Jul 2025568 AMAQI
27th Jul 2025449 AMAQI
27th Jul 20255210 AMAQI
27th Jul 20254811 AMAQI
27th Jul 20255312 PMAQI
27th Jul 2025461 PMAQI
27th Jul 2025472 PMAQI
27th Jul 2025443 PMAQI
27th Jul 2025484 PMAQI
27th Jul 2025565 PMAQI
27th Jul 2025546 PMAQI
27th Jul 2025547 PMAQI
27th Jul 2025548 PMAQI
27th Jul 2025539 PMAQI
27th Jul 20255310 PMAQI
27th Jul 20255011 PMAQI
28th Jul 20255412 AMAQI
28th Jul 2025561 AMAQI
28th Jul 2025582 AMAQI
28th Jul 2025573 AMAQI
28th Jul 2025564 AMAQI
28th Jul 2025505 AMAQI

26°C24/28°C

28th Jul 2025326 AMAQI
28th Jul 2025527 AMAQI
28th Jul 2025538 AMAQI
28th Jul 2025489 AMAQI
28th Jul 20255510 AMAQI
28th Jul 20254311 AMAQI
28th Jul 20254512 PMAQI
28th Jul 2025371 PMAQI
28th Jul 2025402 PMAQI
28th Jul 2025403 PMAQI
28th Jul 2025404 PMAQI
28th Jul 2025385 PMAQI
28th Jul 2025446 PMAQI
28th Jul 2025387 PMAQI
28th Jul 2025418 PMAQI
28th Jul 2025449 PMAQI
28th Jul 20254810 PMAQI
28th Jul 20255211 PMAQI
29th Jul 20255612 AMAQI
29th Jul 2025551 AMAQI
29th Jul 2025542 AMAQI
29th Jul 2025533 AMAQI
29th Jul 2025534 AMAQI
29th Jul 2025585 AMAQI

27°C25/29°C

29th Jul 2025726 AMAQI
29th Jul 2025737 AMAQI
29th Jul 2025628 AMAQI
29th Jul 2025499 AMAQI
29th Jul 20255610 AMAQI
29th Jul 20254811 AMAQI
29th Jul 20255012 PMAQI
29th Jul 2025431 PMAQI
29th Jul 2025422 PMAQI
29th Jul 2025383 PMAQI
29th Jul 2025424 PMAQI
29th Jul 2025535 PMAQI
29th Jul 2025556 PMAQI
29th Jul 2025577 PMAQI
29th Jul 2025558 PMAQI
29th Jul 2025589 PMAQI
29th Jul 20256010 PMAQI
29th Jul 20256511 PMAQI
30th Jul 20256112 AMAQI
30th Jul 2025571 AMAQI
30th Jul 2025562 AMAQI
30th Jul 2025573 AMAQI
30th Jul 2025584 AMAQI
30th Jul 2025625 AMAQI

27°C25/29°C

30th Jul 2025786 AMAQI
30th Jul 2025777 AMAQI
30th Jul 2025748 AMAQI
30th Jul 2025559 AMAQI
30th Jul 20255310 AMAQI
30th Jul 20254911 AMAQI
30th Jul 20254712 PMAQI
30th Jul 2025391 PMAQI
30th Jul 2025442 PMAQI
30th Jul 2025403 PMAQI
30th Jul 2025484 PMAQI
30th Jul 2025455 PMAQI
30th Jul 2025556 PMAQI
30th Jul 2025597 PMAQI
30th Jul 2025588 PMAQI
30th Jul 2025589 PMAQI
30th Jul 20255810 PMAQI
30th Jul 20255811 PMAQI
31st Jul 20255812 AMAQI
31st Jul 2025601 AMAQI
31st Jul 2025602 AMAQI
31st Jul 2025603 AMAQI
31st Jul 2025604 AMAQI
31st Jul 2025605 AMAQI

27°C25/29°C

31st Jul 2025606 AMAQI
31st Jul 2025537 AMAQI
31st Jul 2025328 AMAQI
31st Jul 2025429 AMAQI
31st Jul 20255310 AMAQI
31st Jul 20254611 AMAQI
31st Jul 20255612 PMAQI
31st Jul 2025601 PMAQI
31st Jul 2025452 PMAQI
31st Jul 2025483 PMAQI
31st Jul 2025484 PMAQI
31st Jul 2025625 PMAQI
31st Jul 2025686 PMAQI
31st Jul 2025767 PMAQI
31st Jul 2025848 PMAQI
31st Jul 2025789 PMAQI
31st Jul 20257310 PMAQI
31st Jul 20257411 PMAQI
1st Aug 20256912 AMAQI
1st Aug 2025641 AMAQI
1st Aug 2025652 AMAQI
1st Aug 2025643 AMAQI
1st Aug 2025654 AMAQI
1st Aug 2025645 AMAQI

26°C25/28°C

1st Aug 2025606 AMAQI
1st Aug 2025627 AMAQI
1st Aug 2025638 AMAQI
1st Aug 2025749 AMAQI
1st Aug 20256610 AMAQI
1st Aug 20257011 AMAQI
1st Aug 20257712 PMAQI
1st Aug 2025701 PMAQI
1st Aug 2025742 PMAQI
1st Aug 2025713 PMAQI
1st Aug 2025634 PMAQI
1st Aug 2025715 PMAQI
1st Aug 2025706 PMAQI
1st Aug 2025707 PMAQI
1st Aug 2025688 PMAQI
1st Aug 2025689 PMAQI
1st Aug 20257410 PMAQI
1st Aug 20257811 PMAQI
2nd Aug 20257112 AMAQI
2nd Aug 2025681 AMAQI
2nd Aug 2025662 AMAQI
2nd Aug 2025673 AMAQI
2nd Aug 2025654 AMAQI
2nd Aug 2025655 AMAQI

27°C26/28°C

2nd Aug 2025686 AMAQI
2nd Aug 2025687 AMAQI
2nd Aug 2025708 AMAQI
2nd Aug 2025859 AMAQI
2nd Aug 20258210 AMAQI
2nd Aug 20258611 AMAQI
2nd Aug 20257912 PMAQI
2nd Aug 2025761 PMAQI
2nd Aug 2025782 PMAQI
2nd Aug 20251013 PMAQI
2nd Aug 2025814 PMAQI
2nd Aug 2025725 PMAQI
2nd Aug 2025696 PMAQI
2nd Aug 2025687 PMAQI
2nd Aug 2025778 PMAQI
2nd Aug 2025739 PMAQI
2nd Aug 20256810 PMAQI
2nd Aug 20256811 PMAQI
3rd Aug 20257212 AMAQI
3rd Aug 2025721 AMAQI
3rd Aug 2025712 AMAQI
3rd Aug 2025703 AMAQI
3rd Aug 2025704 AMAQI
3rd Aug 2025675 AMAQI

26°C25/28°C

3rd Aug 2025806 AMAQI
3rd Aug 2025697 AMAQI
3rd Aug 2025748 AMAQI
3rd Aug 2025739 AMAQI
3rd Aug 20257410 AMAQI
3rd Aug 20258111 AMAQI
3rd Aug 20258212 PMAQI
3rd Aug 2025811 PMAQI
3rd Aug 2025742 PMAQI
3rd Aug 2025673 PMAQI
3rd Aug 2025644 PMAQI
3rd Aug 2025665 PMAQI
3rd Aug 2025656 PMAQI
3rd Aug 2025697 PMAQI
3rd Aug 2025748 PMAQI
3rd Aug 2025699 PMAQI
3rd Aug 20257010 PMAQI
3rd Aug 20256811 PMAQI
4th Aug 20257212 AMAQI
4th Aug 2025741 AMAQI
4th Aug 2025752 AMAQI
4th Aug 2025733 AMAQI
4th Aug 2025754 AMAQI
4th Aug 2025645 AMAQI

25°C25/26°C

4th Aug 2025646 AMAQI
4th Aug 2025617 AMAQI
4th Aug 2025608 AMAQI
4th Aug 2025699 AMAQI
4th Aug 20256010 AMAQI
4th Aug 20256011 AMAQI
4th Aug 20256112 PMAQI
4th Aug 2025651 PMAQI
4th Aug 2025622 PMAQI
4th Aug 2025663 PMAQI
4th Aug 2025634 PMAQI
4th Aug 2025645 PMAQI
4th Aug 2025646 PMAQI
4th Aug 2025647 PMAQI
4th Aug 2025688 PMAQI
4th Aug 2025739 PMAQI
4th Aug 20257110 PMAQI
4th Aug 20256911 PMAQI
5th Aug 20256812 AMAQI
5th Aug 2025691 AMAQI
5th Aug 2025662 AMAQI
5th Aug 2025673 AMAQI
5th Aug 2025674 AMAQI
5th Aug 2025655 AMAQI

26°C24/28°C

5th Aug 2025606 AMAQI
5th Aug 2025507 AMAQI
5th Aug 2025608 AMAQI
5th Aug 2025529 AMAQI
5th Aug 20255510 AMAQI
5th Aug 20256411 AMAQI
5th Aug 20256412 PMAQI
5th Aug 2025601 PMAQI
5th Aug 2025642 PMAQI
5th Aug 2025663 PMAQI
5th Aug 2025654 PMAQI
5th Aug 2025695 PMAQI
5th Aug 2025696 PMAQI
5th Aug 2025707 PMAQI
5th Aug 2025728 PMAQI
5th Aug 2025679 PMAQI
5th Aug 20256210 PMAQI
5th Aug 20256411 PMAQI
6th Aug 20256612 AMAQI
6th Aug 2025651 AMAQI
6th Aug 2025662 AMAQI
6th Aug 2025663 AMAQI
6th Aug 2025654 AMAQI
6th Aug 2025695 AMAQI

26°C24/27°C

6th Aug 2025726 AMAQI
6th Aug 2025647 AMAQI
6th Aug 2025628 AMAQI
6th Aug 2025649 AMAQI
6th Aug 20256510 AMAQI
6th Aug 20256511 AMAQI
6th Aug 20256812 PMAQI
6th Aug 2025761 PMAQI
6th Aug 2025652 PMAQI
6th Aug 2025663 PMAQI
6th Aug 2025644 PMAQI
6th Aug 2025665 PMAQI
6th Aug 2025666 PMAQI
6th Aug 2025727 PMAQI
6th Aug 2025678 PMAQI
6th Aug 2025689 PMAQI
6th Aug 20256210 PMAQI
6th Aug 20256911 PMAQI
7th Aug 20256212 AMAQI
7th Aug 2025711 AMAQI
7th Aug 2025682 AMAQI
7th Aug 2025683 AMAQI
7th Aug 2025694 AMAQI
7th Aug 2025645 AMAQI

26°C24/28°C

7th Aug 2025576 AMAQI
7th Aug 2025607 AMAQI
7th Aug 2025608 AMAQI
7th Aug 2025609 AMAQI
7th Aug 20257010 AMAQI
7th Aug 20255311 AMAQI
7th Aug 20255012 PMAQI
7th Aug 2025531 PMAQI
7th Aug 2025582 PMAQI
7th Aug 2025443 PMAQI
7th Aug 2025434 PMAQI
7th Aug 2025515 PMAQI
7th Aug 2025566 PMAQI
7th Aug 2025587 PMAQI
7th Aug 2025548 PMAQI
7th Aug 2025549 PMAQI
7th Aug 20255410 PMAQI
7th Aug 20255511 PMAQI
8th Aug 20256012 AMAQI
8th Aug 2025651 AMAQI
8th Aug 2025662 AMAQI
8th Aug 2025663 AMAQI
8th Aug 2025654 AMAQI
8th Aug 2025605 AMAQI

26°C25/28°C

8th Aug 2025396 AMAQI
8th Aug 2025487 AMAQI
8th Aug 2025458 AMAQI
8th Aug 2025499 AMAQI
8th Aug 20255410 AMAQI
8th Aug 20255411 AMAQI
8th Aug 20255612 PMAQI
8th Aug 2025541 PMAQI
8th Aug 2025532 PMAQI
8th Aug 2025533 PMAQI
8th Aug 2025484 PMAQI
8th Aug 2025505 PMAQI
8th Aug 2025566 PMAQI
8th Aug 2025627 PMAQI
8th Aug 2025648 PMAQI
8th Aug 2025629 PMAQI
8th Aug 20255610 PMAQI
8th Aug 20256011 PMAQI
9th Aug 20256412 AMAQI
9th Aug 2025621 AMAQI
9th Aug 2025642 AMAQI
9th Aug 2025643 AMAQI
9th Aug 2025654 AMAQI
9th Aug 2025665 AMAQI

26°C25/28°C

9th Aug 2025706 AMAQI
9th Aug 2025747 AMAQI
9th Aug 2025728 AMAQI
9th Aug 2025599 AMAQI
9th Aug 20255710 AMAQI
9th Aug 20254711 AMAQI
9th Aug 20254412 PMAQI
9th Aug 2025431 PMAQI
9th Aug 2025472 PMAQI
9th Aug 2025443 PMAQI
9th Aug 2025514 PMAQI
9th Aug 2025595 PMAQI
9th Aug 2025606 PMAQI
9th Aug 2025667 PMAQI
9th Aug 2025608 PMAQI
9th Aug 2025579 PMAQI
9th Aug 20255410 PMAQI
9th Aug 20255711 PMAQI
10th Aug 20257012 AMAQI
10th Aug 2025661 AMAQI
10th Aug 2025652 AMAQI
10th Aug 2025653 AMAQI
10th Aug 2025654 AMAQI
10th Aug 2025655 AMAQI

26°C25/28°C

10th Aug 2025756 AMAQI
10th Aug 2025707 AMAQI
10th Aug 2025678 AMAQI
10th Aug 2025449 AMAQI
10th Aug 20255310 AMAQI
10th Aug 20256211 AMAQI
10th Aug 20255612 PMAQI
10th Aug 2025491 PMAQI
10th Aug 2025572 PMAQI
10th Aug 2025583 PMAQI
10th Aug 2025494 PMAQI
10th Aug 2025535 PMAQI
10th Aug 2025666 PMAQI
10th Aug 2025677 PMAQI
10th Aug 2025628 PMAQI
10th Aug 2025589 PMAQI
10th Aug 20256010 PMAQI
10th Aug 20255711 PMAQI
11th Aug 20256112 AMAQI
11th Aug 2025681 AMAQI
11th Aug 2025682 AMAQI
11th Aug 2025683 AMAQI
11th Aug 2025684 AMAQI
11th Aug 2025645 AMAQI

26°C25/28°C

11th Aug 2025476 AMAQI
11th Aug 2025517 AMAQI
11th Aug 2025498 AMAQI
11th Aug 2025449 AMAQI
11th Aug 20255210 AMAQI
11th Aug 20255511 AMAQI
11th Aug 20256612 PMAQI
11th Aug 2025621 PMAQI
11th Aug 2025602 PMAQI
11th Aug 2025553 PMAQI
11th Aug 2025644 PMAQI
11th Aug 2025635 PMAQI
11th Aug 2025656 PMAQI
11th Aug 2025677 PMAQI
11th Aug 2025668 PMAQI
11th Aug 2025629 PMAQI
11th Aug 20256310 PMAQI
11th Aug 20256411 PMAQI
12th Aug 20256612 AMAQI
12th Aug 2025661 AMAQI
12th Aug 2025672 AMAQI
12th Aug 2025663 AMAQI
12th Aug 2025664 AMAQI
12th Aug 2025635 AMAQI

26°C24/29°C

12th Aug 2025586 AMAQI
12th Aug 2025557 AMAQI
12th Aug 2025558 AMAQI
12th Aug 2025609 AMAQI
12th Aug 20257610 AMAQI
12th Aug 20256711 AMAQI
12th Aug 20256812 PMAQI
12th Aug 2025731 PMAQI
12th Aug 2025702 PMAQI
12th Aug 2025693 PMAQI
12th Aug 2025644 PMAQI
12th Aug 2025655 PMAQI
12th Aug 2025646 PMAQI
12th Aug 2025667 PMAQI
12th Aug 2025798 PMAQI
12th Aug 2025689 PMAQI
12th Aug 20257010 PMAQI
12th Aug 20256911 PMAQI
13th Aug 20256712 AMAQI
13th Aug 2025671 AMAQI
13th Aug 2025652 AMAQI
13th Aug 2025653 AMAQI
13th Aug 2025644 AMAQI
13th Aug 2025685 AMAQI

26°C24/28°C

13th Aug 2025626 AMAQI
13th Aug 2025547 AMAQI
13th Aug 2025598 AMAQI
13th Aug 2025599 AMAQI
13th Aug 20256410 AMAQI
13th Aug 20256211 AMAQI
13th Aug 20256012 PMAQI
13th Aug 2025641 PMAQI
13th Aug 2025602 PMAQI
13th Aug 2025603 PMAQI
13th Aug 2025644 PMAQI
13th Aug 2025645 PMAQI
13th Aug 2025606 PMAQI
13th Aug 2025607 PMAQI
13th Aug 2025668 PMAQI
13th Aug 2025649 PMAQI
13th Aug 20256110 PMAQI
13th Aug 20256311 PMAQI
14th Aug 20256212 AMAQI
14th Aug 2025641 AMAQI
14th Aug 2025622 AMAQI
14th Aug 2025613 AMAQI
14th Aug 2025624 AMAQI
14th Aug 2025605 AMAQI

26°C25/28°C

14th Aug 2025646 AMAQI
14th Aug 2025577 AMAQI
14th Aug 2025598 AMAQI
14th Aug 2025589 AMAQI
14th Aug 20255610 AMAQI
14th Aug 20255311 AMAQI
14th Aug 20255912 PMAQI
14th Aug 2025631 PMAQI
14th Aug 2025602 PMAQI
14th Aug 2025583 PMAQI
14th Aug 2025604 PMAQI
14th Aug 2025585 PMAQI
14th Aug 2025626 PMAQI
14th Aug 2025637 PMAQI
14th Aug 2025658 PMAQI
14th Aug 2025599 PMAQI
14th Aug 20256410 PMAQI
14th Aug 20256811 PMAQI
15th Aug 20256212 AMAQI
15th Aug 2025621 AMAQI
15th Aug 2025612 AMAQI
15th Aug 2025633 AMAQI
15th Aug 2025624 AMAQI
15th Aug 2025525 AMAQI

26°C24/28°C

15th Aug 2025556 AMAQI
15th Aug 2025577 AMAQI
15th Aug 2025608 AMAQI
15th Aug 2025629 AMAQI
15th Aug 20255710 AMAQI
15th Aug 20255411 AMAQI
15th Aug 20256012 PMAQI
15th Aug 2025621 PMAQI
15th Aug 2025622 PMAQI
15th Aug 2025603 PMAQI
15th Aug 2025564 PMAQI
15th Aug 2025565 PMAQI
15th Aug 2025566 PMAQI
15th Aug 2025597 PMAQI
15th Aug 2025608 PMAQI
15th Aug 2025629 PMAQI
15th Aug 20256710 PMAQI
15th Aug 20256211 PMAQI
16th Aug 20256112 AMAQI
16th Aug 2025621 AMAQI
16th Aug 2025602 AMAQI
16th Aug 2025613 AMAQI
16th Aug 2025594 AMAQI
16th Aug 2025555 AMAQI

26°C25/28°C

16th Aug 2025546 AMAQI
16th Aug 2025557 AMAQI
16th Aug 2025578 AMAQI
16th Aug 2025599 AMAQI
16th Aug 20255810 AMAQI
16th Aug 20256111 AMAQI
16th Aug 20256212 PMAQI
16th Aug 2025691 PMAQI
16th Aug 2025602 PMAQI
16th Aug 2025603 PMAQI
16th Aug 2025564 PMAQI
16th Aug 2025605 PMAQI
16th Aug 2025616 PMAQI
16th Aug 2025627 PMAQI
16th Aug 2025678 PMAQI
16th Aug 2025659 PMAQI
16th Aug 20256410 PMAQI
16th Aug 20257011 PMAQI
17th Aug 20256112 AMAQI
17th Aug 2025601 AMAQI
17th Aug 2025612 AMAQI
17th Aug 2025603 AMAQI
17th Aug 2025614 AMAQI
17th Aug 2025575 AMAQI

26°C25/28°C

17th Aug 2025576 AMAQI
17th Aug 2025577 AMAQI
17th Aug 2025598 AMAQI
17th Aug 2025649 AMAQI
17th Aug 20256110 AMAQI
17th Aug 20256211 AMAQI
17th Aug 20255812 PMAQI
17th Aug 2025601 PMAQI
17th Aug 2025622 PMAQI
17th Aug 2025573 PMAQI
17th Aug 2025564 PMAQI
17th Aug 2025555 PMAQI
17th Aug 2025566 PMAQI
17th Aug 2025597 PMAQI
17th Aug 2025628 PMAQI
17th Aug 2025609 PMAQI
17th Aug 20256310 PMAQI
17th Aug 20255811 PMAQI
18th Aug 20255812 AMAQI
18th Aug 2025581 AMAQI
18th Aug 2025572 AMAQI
18th Aug 2025563 AMAQI
18th Aug 2025564 AMAQI
18th Aug 2025585 AMAQI

26°C25/28°C

18th Aug 2025556 AMAQI
18th Aug 2025587 AMAQI
18th Aug 2025598 AMAQI
18th Aug 2025569 AMAQI
18th Aug 20256310 AMAQI
18th Aug 20255911 AMAQI
18th Aug 20256512 PMAQI
18th Aug 2025621 PMAQI
18th Aug 2025612 PMAQI
18th Aug 2025613 PMAQI
18th Aug 2025614 PMAQI
18th Aug 2025615 PMAQI
18th Aug 2025656 PMAQI
18th Aug 2025637 PMAQI
18th Aug 2025598 PMAQI
18th Aug 2025589 PMAQI
18th Aug 20256010 PMAQI
18th Aug 20256111 PMAQI
19th Aug 20255612 AMAQI
19th Aug 2025561 AMAQI
19th Aug 2025542 AMAQI
19th Aug 2025543 AMAQI
19th Aug 2025544 AMAQI
19th Aug 2025585 AMAQI

27°C25/29°C

19th Aug 2025636 AMAQI
19th Aug 2025647 AMAQI
19th Aug 2025588 AMAQI
19th Aug 2025649 AMAQI
19th Aug 20256410 AMAQI
19th Aug 20256011 AMAQI
19th Aug 20256212 PMAQI
19th Aug 2025641 PMAQI
19th Aug 2025592 PMAQI
19th Aug 2025623 PMAQI
19th Aug 2025594 PMAQI
19th Aug 2025545 PMAQI
19th Aug 2025586 PMAQI
19th Aug 2025607 PMAQI
19th Aug 2025598 PMAQI
19th Aug 2025569 PMAQI
19th Aug 20256210 PMAQI
19th Aug 20256111 PMAQI
20th Aug 20255912 AMAQI
20th Aug 2025541 AMAQI
20th Aug 2025552 AMAQI
20th Aug 2025543 AMAQI
20th Aug 2025554 AMAQI
20th Aug 2025565 AMAQI

27°C25/29°C

20th Aug 2025576 AMAQI
20th Aug 2025527 AMAQI
20th Aug 2025628 AMAQI
20th Aug 2025699 AMAQI
20th Aug 20255810 AMAQI
20th Aug 20256211 AMAQI
20th Aug 20255112 PMAQI
20th Aug 2025551 PMAQI
20th Aug 2025652 PMAQI
20th Aug 2025583 PMAQI
20th Aug 2025624 PMAQI
20th Aug 2025585 PMAQI
20th Aug 2025606 PMAQI
20th Aug 2025627 PMAQI
20th Aug 2025678 PMAQI
20th Aug 2025669 PMAQI
20th Aug 20256610 PMAQI
20th Aug 20257011 PMAQI
21st Aug 20256412 AMAQI
21st Aug 2025581 AMAQI
21st Aug 2025582 AMAQI
21st Aug 2025583 AMAQI
21st Aug 2025584 AMAQI
21st Aug 2025605 AMAQI

27°C25/29°C

21st Aug 2025626 AMAQI
21st Aug 2025597 AMAQI
21st Aug 2025648 AMAQI
21st Aug 2025819 AMAQI
21st Aug 20256610 AMAQI
21st Aug 20257011 AMAQI
21st Aug 20256712 PMAQI
21st Aug 2025581 PMAQI
21st Aug 2025582 PMAQI
21st Aug 2025633 PMAQI
21st Aug 2025664 PMAQI
21st Aug 2025625 PMAQI
21st Aug 2025646 PMAQI
21st Aug 2025687 PMAQI
21st Aug 2025658 PMAQI
21st Aug 2025669 PMAQI
21st Aug 20257110 PMAQI
21st Aug 20256411 PMAQI
22nd Aug 20256312 AMAQI

--°C/°C

6 AM
12 PM
6 PM
12 AM
5 AM

--°C/°C

Day time
Avg. Highest Time
6 AM - 12 PM

59AQI

7 hours / Day
210 hours / Month
Avg. Lowest Time
1 PM - 5 PM

56AQI

5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 12 PM (Avg. 59), while the lowest AQI was between 1 PM to 5 PM (Avg. 56).
Night time
Avg. Highest Time
12 AM - 11 PM

61AQI

11 hours / Day
330 hours / Month
Avg. Lowest Time
12 AM - 5 AM

61AQI

6 hours / Day
180 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 61), while the lowest AQI was between 12 AM to 5 AM (Avg. 61).

2025 Days Vs Air Quality

Overseas School of Colombo Sensor 1, Sri Jayewardenepura Kotte, Western, Sri Lanka

2025

9%

21

81%

187

10%

23

0.4%

1

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

Good
21 Days
Moderate
187 Days
Poor
23 Days
Unhealthy
1 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 9%

Health Risk Level:

Extreme

In 2025, 9% 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

Overseas School of Colombo Sensor 1, Sri Jayewardenepura Kotte, Western, Sri Lanka

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
76AQI
2nd January 2025
85AQI
3rd January 2025
94AQI
4th January 2025
96AQI
5th January 2025
87AQI
6th January 2025
93AQI
7th January 2025
94AQI
8th January 2025
86AQI
9th January 2025
96AQI
10th January 2025
88AQI
11th January 2025
90AQI
12th January 2025
101AQI
13th January 2025
114AQI
14th January 2025
94AQI
15th January 2025
90AQI
16th January 2025
79AQI
17th January 2025
98AQI
18th January 2025
85AQI
19th January 2025
80AQI
20th January 2025
83AQI
21st January 2025
103AQI
22nd January 2025
92AQI
23rd January 2025
91AQI
24th January 2025
98AQI
25th January 2025
72AQI
26th January 2025
120AQI
27th January 2025
86AQI
28th January 2025
124AQI
29th January 2025
110AQI
30th January 2025
102AQI
31st January 2025
93AQI
1st February 2025
96AQI
2nd February 2025
84AQI
3rd February 2025
85AQI
4th February 2025
87AQI
5th February 2025
97AQI
6th February 2025
116AQI
7th February 2025
96AQI
8th February 2025
113AQI
9th February 2025
129AQI
10th February 2025
173AQI
11th February 2025
110AQI
12th February 2025
106AQI
13th February 2025
92AQI
14th February 2025
90AQI
15th February 2025
80AQI
16th February 2025
76AQI
17th February 2025
87AQI
18th February 2025
117AQI
19th February 2025
102AQI
20th February 2025
107AQI
21st February 2025
90AQI
22nd February 2025
96AQI
23rd February 2025
85AQI
24th February 2025
79AQI
25th February 2025
91AQI
26th February 2025
85AQI
27th February 2025
78AQI
28th February 2025
74AQI
1st March 2025
83AQI
2nd March 2025
67AQI
3rd March 2025
82AQI
4th March 2025
126AQI
5th March 2025
83AQI
6th March 2025
87AQI
7th March 2025
87AQI
8th March 2025
120AQI
9th March 2025
77AQI
10th March 2025
92AQI
11th March 2025
109AQI
12th March 2025
85AQI
13th March 2025
92AQI
14th March 2025
113AQI
15th March 2025
78AQI
16th March 2025
108AQI
17th March 2025
93AQI
18th March 2025
76AQI
19th March 2025
108AQI
20th March 2025
134AQI
21st March 2025
116AQI
22nd March 2025
93AQI
23rd March 2025
88AQI
24th March 2025
75AQI
25th March 2025
81AQI
26th March 2025
81AQI
27th March 2025
81AQI
28th March 2025
79AQI
29th March 2025
79AQI
30th March 2025
77AQI
31st March 2025
69AQI
1st April 2025
67AQI
2nd April 2025
65AQI
3rd April 2025
56AQI
4th April 2025
57AQI
5th April 2025
53AQI
6th April 2025
55AQI
7th April 2025
56AQI
8th April 2025
59AQI
9th April 2025
60AQI
10th April 2025
64AQI
11th April 2025
66AQI
12th April 2025
65AQI
13th April 2025
70AQI
14th April 2025
66AQI
15th April 2025
54AQI
16th April 2025
60AQI
17th April 2025
60AQI
18th April 2025
62AQI
19th April 2025
67AQI
20th April 2025
70AQI
21st April 2025
69AQI
22nd April 2025
67AQI
23rd April 2025
59AQI
24th April 2025
62AQI
25th April 2025
59AQI
26th April 2025
62AQI
27th April 2025
57AQI
28th April 2025
60AQI
29th April 2025
56AQI
30th April 2025
55AQI
1st May 2025
57AQI
2nd May 2025
55AQI
3rd May 2025
56AQI
4th May 2025
69AQI
5th May 2025
71AQI
6th May 2025
71AQI
7th May 2025
74AQI
8th May 2025
78AQI
9th May 2025
80AQI
10th May 2025
82AQI
11th May 2025
73AQI
12th May 2025
64AQI
13th May 2025
62AQI
14th May 2025
65AQI
15th May 2025
74AQI
16th May 2025
68AQI
17th May 2025
70AQI
18th May 2025
62AQI
19th May 2025
52AQI
20th May 2025
59AQI
21st May 2025
59AQI
22nd May 2025
65AQI
23rd May 2025
50AQI
24th May 2025
53AQI
25th May 2025
53AQI
26th May 2025
47AQI
27th May 2025
48AQI
28th May 2025
54AQI
29th May 2025
56AQI
30th May 2025
51AQI
31st May 2025
51AQI
1st June 2025
53AQI
2nd June 2025
52AQI
3rd June 2025
52AQI
4th June 2025
49AQI
5th June 2025
62AQI
6th June 2025
60AQI
7th June 2025
63AQI
8th June 2025
63AQI
9th June 2025
61AQI
10th June 2025
58AQI
11th June 2025
59AQI
12th June 2025
59AQI
13th June 2025
57AQI
14th June 2025
58AQI
15th June 2025
56AQI
16th June 2025
59AQI
17th June 2025
58AQI
18th June 2025
58AQI
19th June 2025
57AQI
20th June 2025
53AQI
21st June 2025
47AQI
22nd June 2025
47AQI
23rd June 2025
47AQI
24th June 2025
50AQI
25th June 2025
56AQI
26th June 2025
60AQI
27th June 2025
60AQI
28th June 2025
58AQI
29th June 2025
53AQI
30th June 2025
46AQI
1st July 2025
53AQI
2nd July 2025
56AQI
3rd July 2025
58AQI
4th July 2025
57AQI
5th July 2025
55AQI
6th July 2025
55AQI
7th July 2025
56AQI
8th July 2025
56AQI
9th July 2025
58AQI
10th July 2025
59AQI
11th July 2025
58AQI
12th July 2025
59AQI
13th July 2025
58AQI
14th July 2025
56AQI
15th July 2025
48AQI
16th July 2025
47AQI
17th July 2025
44AQI
18th July 2025
44AQI
19th July 2025
45AQI
20th July 2025
44AQI
21st July 2025
41AQI
22nd July 2025
44AQI
23rd July 2025
46AQI
24th July 2025
47AQI
25th July 2025
52AQI
26th July 2025
49AQI
27th July 2025
52AQI
28th July 2025
47AQI
29th July 2025
55AQI
30th July 2025
57AQI
31st July 2025
61AQI
1st August 2025
69AQI
2nd August 2025
74AQI
3rd August 2025
70AQI
4th August 2025
69AQI
5th August 2025
66AQI
6th August 2025
66AQI
7th August 2025
59AQI
8th August 2025
57AQI
9th August 2025
60AQI
10th August 2025
64AQI
11th August 2025
60AQI
12th August 2025
66AQI
13th August 2025
64AQI
14th August 2025
60AQI
15th August 2025
60AQI
16th August 2025
62AQI
17th August 2025
60AQI
18th August 2025
59AQI
19th August 2025
59AQI
20th August 2025
62AQI
21st August 2025
22nd August 2025
23rd August 2025
24th August 2025
25th August 2025
26th August 2025
27th August 2025
28th August 2025
29th August 2025
30th August 2025
31st August 2025
1st September 2025
2nd September 2025
3rd September 2025
4th September 2025
5th September 2025
6th September 2025
7th September 2025
8th September 2025
9th September 2025
10th September 2025
11th September 2025
12th September 2025
13th September 2025
14th September 2025
15th September 2025
16th September 2025
17th September 2025
18th September 2025
19th September 2025
20th September 2025
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

94AQI

97AQI

91AQI

61AQI

62AQI

56AQI

52AQI

63AQI

No. of days

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

202572AQI

24
7
19
8
1
23
8
30
3
28
6
24
12
19
20
21
187
23
1

Highest AQI recorded in

February

97AQI

Lowest AQI recorded in

July

52AQI

202464AQI

12
4
1
1
4
8
4
26
31
14
14
3
6
7
2
28
31
31
161
4

Highest AQI recorded in

January

90AQI

Lowest AQI recorded in

April

33AQI

202335AQI

17
14
22
5
1
17
12
2
27
3
31
11
1
2
3
27
1
129
63
4

Highest AQI recorded in

December

70AQI

Lowest AQI recorded in

June

2AQI

202250AQI

2
1
1
17
8
5
16
11
3
35
20
9

Highest AQI recorded in

October

56AQI

Lowest AQI recorded in

November

48AQI

Most & Least Polluted Years Over the Last 4 Years

Most Polluted Year Recorded
2025(Avg.)
72AQI
Least Polluted Year Recorded
2023(Avg.)
35AQI

Overseas School of Colombo Sensor 1's annual 2025 AQI (72) shows an average percentage change of 54.6% (worsened AQI) compared to previous years: 2022 (50), 2023 (35), 2024 (64).