Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Western Water Catchment, West Region, Singapore 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+

October Air Quality Analysis

Western Water Catchment, West Region, Singapore

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
19th Oct 2024
96AQI
Lowest AQI recorded on
12th Oct 2022
17AQI

Same Day Analysis (16th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 68 of Moderate air quality on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 16th Oct - 17th Oct 2025

Western Water Catchment, West Region, Singapore

AQI
Day
Night
.

6 AM16th Oct 2025

6 PM

5 AM17th Oct 2025

Day time
Avg. Highest Time
12PM16th Oct

70AQI

Avg. Lowest Time
6PM16th Oct

53AQI

Night time
Avg. Highest Time
5AM17th Oct

76AQI

Avg. Lowest Time
7PM16th Oct

53AQI

In the last 24 hours,

Western Water Catchment's AQI reached its highest point of 76 at 5 AM during the Night, while the lowest point, 53, was recorded at 7 PM during the Night between 16th Oct and 17th Oct 2025.

Day & Night AQI Trend : Sep - Oct 2025

Western Water Catchment, West Region, Singapore

SepOct
17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th
Day
Night
17th Sep 2025556 AMAQI
17th Sep 2025557 AMAQI
17th Sep 2025308 AMAQI
17th Sep 2025249 AMAQI
17th Sep 20252310 AMAQI
17th Sep 20253911 AMAQI
17th Sep 20253612 PMAQI
17th Sep 2025341 PMAQI
17th Sep 2025392 PMAQI
17th Sep 2025413 PMAQI
17th Sep 2025384 PMAQI
17th Sep 2025525 PMAQI
17th Sep 2025406 PMAQI
17th Sep 2025407 PMAQI
17th Sep 2025468 PMAQI
17th Sep 2025529 PMAQI
17th Sep 20255310 PMAQI
17th Sep 20255411 PMAQI
18th Sep 20255512 AMAQI
18th Sep 2025541 AMAQI
18th Sep 2025532 AMAQI
18th Sep 2025523 AMAQI
18th Sep 2025514 AMAQI
18th Sep 2025515 AMAQI

25°C23/27°C

18th Sep 2025526 AMAQI
18th Sep 2025527 AMAQI
18th Sep 2025558 AMAQI
18th Sep 2025529 AMAQI
18th Sep 20255810 AMAQI
18th Sep 20255511 AMAQI
18th Sep 20255212 PMAQI
18th Sep 2025501 PMAQI
18th Sep 2025532 PMAQI
18th Sep 2025523 PMAQI
18th Sep 2025504 PMAQI
18th Sep 2025555 PMAQI
18th Sep 2025586 PMAQI
18th Sep 2025587 PMAQI
18th Sep 2025568 PMAQI
18th Sep 2025589 PMAQI
18th Sep 20256010 PMAQI
18th Sep 20255811 PMAQI
19th Sep 20255712 AMAQI
19th Sep 2025541 AMAQI
19th Sep 2025522 AMAQI
19th Sep 2025523 AMAQI
19th Sep 2025534 AMAQI
19th Sep 2025525 AMAQI

27°C25/30°C

19th Sep 2025536 AMAQI
19th Sep 2025537 AMAQI
19th Sep 2025488 AMAQI
19th Sep 2025529 AMAQI
19th Sep 20254810 AMAQI
19th Sep 20254811 AMAQI
19th Sep 20255112 PMAQI
19th Sep 2025521 PMAQI
19th Sep 2025522 PMAQI
19th Sep 2025523 PMAQI
19th Sep 2025534 PMAQI
19th Sep 2025535 PMAQI
19th Sep 2025566 PMAQI
19th Sep 2025587 PMAQI
19th Sep 2025558 PMAQI
19th Sep 2025579 PMAQI
19th Sep 20255610 PMAQI
19th Sep 20255811 PMAQI
20th Sep 20255812 AMAQI
20th Sep 2025541 AMAQI
20th Sep 2025552 AMAQI
20th Sep 2025543 AMAQI
20th Sep 2025544 AMAQI
20th Sep 2025535 AMAQI

27°C25/31°C

20th Sep 2025536 AMAQI
20th Sep 2025537 AMAQI
20th Sep 2025598 AMAQI
20th Sep 2025649 AMAQI
20th Sep 20256610 AMAQI
20th Sep 20256811 AMAQI
20th Sep 20255612 PMAQI
20th Sep 2025511 PMAQI
20th Sep 2025522 PMAQI
20th Sep 2025523 PMAQI
20th Sep 2025544 PMAQI
20th Sep 2025585 PMAQI
20th Sep 2025566 PMAQI
20th Sep 2025547 PMAQI
20th Sep 2025568 PMAQI
20th Sep 2025569 PMAQI
20th Sep 20255710 PMAQI
20th Sep 20255711 PMAQI
21st Sep 20255512 AMAQI
21st Sep 2025551 AMAQI
21st Sep 2025552 AMAQI
21st Sep 2025553 AMAQI
21st Sep 2025564 AMAQI
21st Sep 2025555 AMAQI

27°C24/31°C

21st Sep 2025566 AMAQI
21st Sep 2025557 AMAQI
21st Sep 2025488 AMAQI
21st Sep 2025509 AMAQI
21st Sep 20255310 AMAQI
21st Sep 20255011 AMAQI
21st Sep 20254512 PMAQI
21st Sep 2025521 PMAQI
21st Sep 2025502 PMAQI
21st Sep 2025503 PMAQI
21st Sep 2025494 PMAQI
21st Sep 2025425 PMAQI
21st Sep 2025406 PMAQI
21st Sep 2025487 PMAQI
21st Sep 2025538 PMAQI
21st Sep 2025549 PMAQI
21st Sep 20255610 PMAQI
21st Sep 20255511 PMAQI
22nd Sep 20255412 AMAQI
22nd Sep 2025551 AMAQI
22nd Sep 2025552 AMAQI
22nd Sep 2025543 AMAQI
22nd Sep 2025544 AMAQI
22nd Sep 2025545 AMAQI

28°C25/31°C

22nd Sep 2025556 AMAQI
22nd Sep 2025547 AMAQI
22nd Sep 2025338 AMAQI
22nd Sep 2025399 AMAQI
22nd Sep 20255010 AMAQI
22nd Sep 20254611 AMAQI
22nd Sep 20254812 PMAQI
22nd Sep 2025491 PMAQI
22nd Sep 2025482 PMAQI
22nd Sep 2025523 PMAQI
22nd Sep 2025474 PMAQI
22nd Sep 2025505 PMAQI
22nd Sep 2025516 PMAQI
22nd Sep 2025517 PMAQI
22nd Sep 2025548 PMAQI
22nd Sep 2025559 PMAQI
22nd Sep 20255510 PMAQI
22nd Sep 20255511 PMAQI
23rd Sep 20255512 AMAQI
23rd Sep 2025541 AMAQI
23rd Sep 2025542 AMAQI
23rd Sep 2025543 AMAQI
23rd Sep 2025544 AMAQI
23rd Sep 2025545 AMAQI

28°C26/32°C

23rd Sep 2025546 AMAQI
23rd Sep 2025547 AMAQI
23rd Sep 2025568 AMAQI
23rd Sep 2025619 AMAQI
23rd Sep 20256010 AMAQI
23rd Sep 20256011 AMAQI
23rd Sep 20256012 PMAQI
23rd Sep 2025541 PMAQI
23rd Sep 2025522 PMAQI
23rd Sep 2025513 PMAQI
23rd Sep 2025504 PMAQI
23rd Sep 2025535 PMAQI
23rd Sep 2025536 PMAQI
23rd Sep 2025547 PMAQI
23rd Sep 2025548 PMAQI
23rd Sep 2025559 PMAQI
23rd Sep 20255610 PMAQI
23rd Sep 20255511 PMAQI
24th Sep 20255712 AMAQI
24th Sep 2025561 AMAQI
24th Sep 2025542 AMAQI
24th Sep 2025543 AMAQI
24th Sep 2025544 AMAQI
24th Sep 2025555 AMAQI

28°C25/32°C

24th Sep 2025546 AMAQI
24th Sep 2025557 AMAQI
24th Sep 2025608 AMAQI
24th Sep 2025609 AMAQI
24th Sep 20256010 AMAQI
24th Sep 20256611 AMAQI
24th Sep 20256212 PMAQI
24th Sep 2025581 PMAQI
24th Sep 2025582 PMAQI
24th Sep 2025583 PMAQI
24th Sep 2025594 PMAQI
24th Sep 2025585 PMAQI
24th Sep 2025606 PMAQI
24th Sep 2025617 PMAQI
24th Sep 2025608 PMAQI
24th Sep 2025609 PMAQI
24th Sep 20255910 PMAQI
24th Sep 20255811 PMAQI
25th Sep 20255812 AMAQI
25th Sep 2025561 AMAQI
25th Sep 2025562 AMAQI
25th Sep 2025553 AMAQI
25th Sep 2025574 AMAQI
25th Sep 2025565 AMAQI

28°C25/32°C

25th Sep 2025586 AMAQI
25th Sep 2025567 AMAQI
25th Sep 2025518 AMAQI
25th Sep 2025529 AMAQI
25th Sep 20255610 AMAQI
25th Sep 20255711 AMAQI
25th Sep 20255712 PMAQI
25th Sep 2025561 PMAQI
25th Sep 2025562 PMAQI
25th Sep 2025543 PMAQI
25th Sep 2025544 PMAQI
25th Sep 2025575 PMAQI
25th Sep 2025566 PMAQI
25th Sep 2025637 PMAQI
25th Sep 2025718 PMAQI
25th Sep 2025709 PMAQI
25th Sep 20257710 PMAQI
25th Sep 20257911 PMAQI
26th Sep 20258012 AMAQI
26th Sep 2025811 AMAQI
26th Sep 2025822 AMAQI
26th Sep 2025783 AMAQI
26th Sep 2025744 AMAQI
26th Sep 2025805 AMAQI

28°C25/32°C

26th Sep 2025766 AMAQI
26th Sep 2025787 AMAQI
26th Sep 2025868 AMAQI
26th Sep 2025819 AMAQI
26th Sep 20257610 AMAQI
26th Sep 20257611 AMAQI
26th Sep 20258012 PMAQI
26th Sep 2025881 PMAQI
26th Sep 2025912 PMAQI
26th Sep 2025933 PMAQI
26th Sep 2025914 PMAQI
26th Sep 2025865 PMAQI
26th Sep 2025866 PMAQI
26th Sep 2025847 PMAQI
26th Sep 2025848 PMAQI
26th Sep 2025879 PMAQI
26th Sep 20258510 PMAQI
26th Sep 20257811 PMAQI
27th Sep 20257612 AMAQI
27th Sep 2025781 AMAQI
27th Sep 2025762 AMAQI
27th Sep 2025753 AMAQI
27th Sep 2025734 AMAQI
27th Sep 2025725 AMAQI

28°C26/32°C

27th Sep 2025736 AMAQI
27th Sep 2025697 AMAQI
27th Sep 2025658 AMAQI
27th Sep 2025669 AMAQI
27th Sep 20256710 AMAQI
27th Sep 20256411 AMAQI
27th Sep 20255812 PMAQI
27th Sep 2025631 PMAQI
27th Sep 2025692 PMAQI
27th Sep 2025673 PMAQI
27th Sep 2025614 PMAQI
27th Sep 2025605 PMAQI
27th Sep 2025616 PMAQI
27th Sep 2025637 PMAQI
27th Sep 2025668 PMAQI
27th Sep 2025669 PMAQI
27th Sep 20256210 PMAQI
27th Sep 20255711 PMAQI
28th Sep 20256012 AMAQI
28th Sep 2025641 AMAQI
28th Sep 2025692 AMAQI
28th Sep 2025753 AMAQI
28th Sep 2025774 AMAQI
28th Sep 2025755 AMAQI

28°C25/32°C

28th Sep 2025736 AMAQI
28th Sep 2025757 AMAQI
28th Sep 2025758 AMAQI
28th Sep 2025729 AMAQI
28th Sep 20257110 AMAQI
28th Sep 20257011 AMAQI
28th Sep 20256812 PMAQI
28th Sep 2025641 PMAQI
28th Sep 2025582 PMAQI
28th Sep 2025553 PMAQI
28th Sep 2025574 PMAQI
28th Sep 2025625 PMAQI
28th Sep 2025666 PMAQI
28th Sep 2025707 PMAQI
28th Sep 2025678 PMAQI
28th Sep 2025659 PMAQI
28th Sep 20256710 PMAQI
28th Sep 20256911 PMAQI
29th Sep 20256512 AMAQI
29th Sep 2025471 AMAQI
29th Sep 2025272 AMAQI
29th Sep 2025253 AMAQI
29th Sep 2025244 AMAQI
29th Sep 2025265 AMAQI

27°C25/30°C

29th Sep 2025286 AMAQI
29th Sep 2025307 AMAQI
29th Sep 2025328 AMAQI
29th Sep 2025339 AMAQI
29th Sep 20253610 AMAQI
29th Sep 20254611 AMAQI
29th Sep 20254212 PMAQI
29th Sep 2025221 PMAQI
29th Sep 2025182 PMAQI
29th Sep 2025163 PMAQI
29th Sep 2025164 PMAQI
29th Sep 2025145 PMAQI
29th Sep 2025206 PMAQI
29th Sep 2025247 PMAQI
29th Sep 2025288 PMAQI
29th Sep 2025359 PMAQI
29th Sep 20253710 PMAQI
29th Sep 20253211 PMAQI
30th Sep 20253612 AMAQI
30th Sep 2025321 AMAQI
30th Sep 2025312 AMAQI
30th Sep 2025273 AMAQI
30th Sep 2025264 AMAQI
30th Sep 2025285 AMAQI

27°C25/29°C

30th Sep 2025306 AMAQI
30th Sep 2025337 AMAQI
30th Sep 2025348 AMAQI
30th Sep 2025389 AMAQI
30th Sep 20255010 AMAQI
30th Sep 20254711 AMAQI
30th Sep 20254212 PMAQI
30th Sep 2025541 PMAQI
30th Sep 2025592 PMAQI
30th Sep 2025623 PMAQI
30th Sep 2025574 PMAQI
30th Sep 2025575 PMAQI
30th Sep 2025606 PMAQI
30th Sep 2025637 PMAQI
30th Sep 2025638 PMAQI
30th Sep 2025639 PMAQI
30th Sep 20256410 PMAQI
30th Sep 20256211 PMAQI
1st Oct 20256212 AMAQI
1st Oct 2025551 AMAQI
1st Oct 2025532 AMAQI
1st Oct 2025413 AMAQI
1st Oct 2025404 AMAQI
1st Oct 2025405 AMAQI

27°C25/29°C

1st Oct 2025526 AMAQI
1st Oct 2025587 AMAQI
1st Oct 2025608 AMAQI
1st Oct 2025609 AMAQI
1st Oct 20256210 AMAQI
1st Oct 20256011 AMAQI
1st Oct 20254712 PMAQI
1st Oct 2025251 PMAQI
1st Oct 2025252 PMAQI
1st Oct 2025243 PMAQI
1st Oct 2025264 PMAQI
1st Oct 2025265 PMAQI
1st Oct 2025276 PMAQI
1st Oct 2025237 PMAQI
1st Oct 2025258 PMAQI
1st Oct 2025379 PMAQI
1st Oct 20254910 PMAQI
1st Oct 20255111 PMAQI
2nd Oct 20255112 AMAQI
2nd Oct 2025531 AMAQI
2nd Oct 2025492 AMAQI
2nd Oct 2025343 AMAQI
2nd Oct 2025414 AMAQI
2nd Oct 2025495 AMAQI

27°C25/31°C

2nd Oct 2025486 AMAQI
2nd Oct 2025537 AMAQI
2nd Oct 2025558 AMAQI
2nd Oct 2025549 AMAQI
2nd Oct 20255310 AMAQI
2nd Oct 20255011 AMAQI
2nd Oct 20255112 PMAQI
2nd Oct 2025451 PMAQI
2nd Oct 2025492 PMAQI
2nd Oct 2025493 PMAQI
2nd Oct 2025534 PMAQI
2nd Oct 2025555 PMAQI
2nd Oct 2025556 PMAQI
2nd Oct 2025597 PMAQI
2nd Oct 2025638 PMAQI
2nd Oct 2025729 PMAQI
2nd Oct 20257310 PMAQI
2nd Oct 20257711 PMAQI
3rd Oct 20257412 AMAQI
3rd Oct 2025751 AMAQI
3rd Oct 2025712 AMAQI
3rd Oct 2025733 AMAQI
3rd Oct 2025624 AMAQI
3rd Oct 2025575 AMAQI

27°C24/32°C

3rd Oct 2025586 AMAQI
3rd Oct 2025647 AMAQI
3rd Oct 2025678 AMAQI
3rd Oct 2025629 AMAQI
3rd Oct 20255710 AMAQI
3rd Oct 20255011 AMAQI
3rd Oct 20255212 PMAQI
3rd Oct 2025411 PMAQI
3rd Oct 2025362 PMAQI
3rd Oct 2025323 PMAQI
3rd Oct 2025394 PMAQI
3rd Oct 2025415 PMAQI
3rd Oct 2025396 PMAQI
3rd Oct 2025467 PMAQI
3rd Oct 2025618 PMAQI
3rd Oct 2025599 PMAQI
3rd Oct 20255810 PMAQI
3rd Oct 20256011 PMAQI
4th Oct 20256612 AMAQI
4th Oct 2025671 AMAQI
4th Oct 2025632 AMAQI
4th Oct 2025633 AMAQI
4th Oct 2025574 AMAQI
4th Oct 2025565 AMAQI

27°C25/30°C

4th Oct 2025566 AMAQI
4th Oct 2025567 AMAQI
4th Oct 2025498 AMAQI
4th Oct 2025499 AMAQI
4th Oct 20255510 AMAQI
4th Oct 20255411 AMAQI
4th Oct 20255512 PMAQI
4th Oct 2025511 PMAQI
4th Oct 2025542 PMAQI
4th Oct 2025493 PMAQI
4th Oct 2025464 PMAQI
4th Oct 2025465 PMAQI
4th Oct 2025466 PMAQI
4th Oct 2025547 PMAQI
4th Oct 2025618 PMAQI
4th Oct 2025449 PMAQI
4th Oct 20255410 PMAQI
4th Oct 20255811 PMAQI
5th Oct 20255612 AMAQI
5th Oct 2025561 AMAQI
5th Oct 2025812 AMAQI
5th Oct 2025683 AMAQI
5th Oct 2025634 AMAQI
5th Oct 2025615 AMAQI

27°C24/30°C

5th Oct 2025576 AMAQI
5th Oct 2025697 AMAQI
5th Oct 2025828 AMAQI
5th Oct 2025779 AMAQI
5th Oct 20258210 AMAQI
5th Oct 20257911 AMAQI
5th Oct 20258112 PMAQI
5th Oct 2025741 PMAQI
5th Oct 2025742 PMAQI
5th Oct 2025693 PMAQI
5th Oct 2025624 PMAQI
5th Oct 2025665 PMAQI
5th Oct 2025666 PMAQI
5th Oct 2025657 PMAQI
5th Oct 2025648 PMAQI
5th Oct 2025659 PMAQI
5th Oct 20256210 PMAQI
5th Oct 20256411 PMAQI
6th Oct 20256512 AMAQI
6th Oct 2025711 AMAQI
6th Oct 2025732 AMAQI
6th Oct 2025793 AMAQI
6th Oct 2025874 AMAQI
6th Oct 2025805 AMAQI

28°C25/32°C

6th Oct 2025766 AMAQI
6th Oct 2025867 AMAQI
6th Oct 2025898 AMAQI
6th Oct 2025809 AMAQI
6th Oct 20257810 AMAQI
6th Oct 20256211 AMAQI
6th Oct 20255712 PMAQI
6th Oct 2025571 PMAQI
6th Oct 2025782 PMAQI
6th Oct 2025713 PMAQI
6th Oct 2025774 PMAQI
6th Oct 2025815 PMAQI
6th Oct 2025686 PMAQI
6th Oct 2025667 PMAQI
6th Oct 2025718 PMAQI
6th Oct 2025719 PMAQI
6th Oct 20256910 PMAQI
6th Oct 20257011 PMAQI
7th Oct 20256612 AMAQI
7th Oct 2025641 AMAQI

27°C25/30°C

7th Oct 2025527 PMAQI
7th Oct 2025768 PMAQI
7th Oct 2025839 PMAQI
7th Oct 20258310 PMAQI
7th Oct 20258111 PMAQI
8th Oct 20258312 AMAQI
8th Oct 2025861 AMAQI
8th Oct 2025822 AMAQI
8th Oct 2025793 AMAQI
8th Oct 2025794 AMAQI
8th Oct 2025745 AMAQI

27°C24/30°C

8th Oct 2025656 AMAQI
8th Oct 2025627 AMAQI
8th Oct 2025698 AMAQI
8th Oct 2025549 AMAQI
8th Oct 20255210 AMAQI
8th Oct 20255511 AMAQI
8th Oct 20256312 PMAQI
8th Oct 2025651 PMAQI
8th Oct 2025772 PMAQI
8th Oct 2025773 PMAQI
8th Oct 2025764 PMAQI
8th Oct 2025585 PMAQI
8th Oct 2025576 PMAQI
8th Oct 2025637 PMAQI
8th Oct 2025658 PMAQI
8th Oct 2025679 PMAQI
8th Oct 20256810 PMAQI
8th Oct 20256911 PMAQI
9th Oct 20257212 AMAQI
9th Oct 2025721 AMAQI
9th Oct 2025692 AMAQI
9th Oct 2025683 AMAQI
9th Oct 2025684 AMAQI
9th Oct 2025685 AMAQI

28°C25/31°C

9th Oct 2025646 AMAQI
9th Oct 2025657 AMAQI
9th Oct 2025648 AMAQI
9th Oct 2025719 AMAQI
9th Oct 20257210 AMAQI
9th Oct 20257811 AMAQI
9th Oct 20257712 PMAQI
9th Oct 2025731 PMAQI
9th Oct 2025692 PMAQI
9th Oct 2025433 PMAQI
9th Oct 2025454 PMAQI
9th Oct 2025465 PMAQI
9th Oct 2025476 PMAQI
9th Oct 2025537 PMAQI
9th Oct 2025588 PMAQI
9th Oct 2025619 PMAQI
9th Oct 20256410 PMAQI
9th Oct 20256711 PMAQI
10th Oct 20256712 AMAQI
10th Oct 2025691 AMAQI
10th Oct 2025662 AMAQI
10th Oct 2025613 AMAQI
10th Oct 2025644 AMAQI
10th Oct 2025585 AMAQI

27°C25/30°C

10th Oct 2025546 AMAQI
10th Oct 2025587 AMAQI
10th Oct 2025618 AMAQI
10th Oct 2025619 AMAQI
10th Oct 20256610 AMAQI
10th Oct 20256711 AMAQI
10th Oct 20255912 PMAQI
10th Oct 2025581 PMAQI
10th Oct 2025562 PMAQI
10th Oct 2025543 PMAQI
10th Oct 2025544 PMAQI
10th Oct 2025545 PMAQI
10th Oct 2025496 PMAQI
10th Oct 2025537 PMAQI
10th Oct 2025438 PMAQI
10th Oct 2025369 PMAQI
10th Oct 20253710 PMAQI
10th Oct 20256211 PMAQI
11th Oct 20256512 AMAQI
11th Oct 2025671 AMAQI
11th Oct 2025672 AMAQI
11th Oct 2025713 AMAQI
11th Oct 2025614 AMAQI
11th Oct 2025605 AMAQI

27°C25/30°C

11th Oct 2025596 AMAQI
11th Oct 2025597 AMAQI
11th Oct 2025708 AMAQI
11th Oct 2025679 AMAQI
11th Oct 20256810 AMAQI
11th Oct 20256611 AMAQI
11th Oct 20257012 PMAQI
11th Oct 2025701 PMAQI
11th Oct 2025712 PMAQI
11th Oct 2025663 PMAQI
11th Oct 2025654 PMAQI
11th Oct 2025655 PMAQI
11th Oct 2025656 PMAQI
11th Oct 2025497 PMAQI
11th Oct 2025478 PMAQI
11th Oct 2025479 PMAQI
11th Oct 20256810 PMAQI
11th Oct 20256911 PMAQI
12th Oct 20257212 AMAQI
12th Oct 2025781 AMAQI
12th Oct 2025862 AMAQI
12th Oct 2025783 AMAQI
12th Oct 2025764 AMAQI
12th Oct 2025755 AMAQI

27°C25/31°C

12th Oct 2025776 AMAQI
12th Oct 2025777 AMAQI
12th Oct 2025828 AMAQI
12th Oct 2025799 AMAQI
12th Oct 20257710 AMAQI
12th Oct 20257611 AMAQI
12th Oct 20257812 PMAQI
12th Oct 2025611 PMAQI
12th Oct 2025552 PMAQI
12th Oct 2025553 PMAQI
12th Oct 2025554 PMAQI
12th Oct 2025595 PMAQI
12th Oct 2025586 PMAQI
12th Oct 2025547 PMAQI
12th Oct 2025538 PMAQI
12th Oct 2025549 PMAQI
12th Oct 20256610 PMAQI
12th Oct 20255511 PMAQI
13th Oct 20255212 AMAQI
13th Oct 2025521 AMAQI
13th Oct 2025612 AMAQI
13th Oct 2025613 AMAQI
13th Oct 2025634 AMAQI
13th Oct 2025555 AMAQI

28°C25/31°C

13th Oct 2025556 AMAQI
13th Oct 2025557 AMAQI
13th Oct 2025548 AMAQI
13th Oct 2025589 AMAQI
13th Oct 20255610 AMAQI
13th Oct 20255611 AMAQI
13th Oct 20256312 PMAQI
13th Oct 2025721 PMAQI
13th Oct 2025752 PMAQI
13th Oct 2025773 PMAQI
13th Oct 2025784 PMAQI
13th Oct 2025765 PMAQI
13th Oct 2025786 PMAQI
13th Oct 2025717 PMAQI
13th Oct 2025718 PMAQI
13th Oct 2025699 PMAQI
13th Oct 20258010 PMAQI
13th Oct 20258711 PMAQI
14th Oct 20258512 AMAQI
14th Oct 2025841 AMAQI
14th Oct 2025752 AMAQI
14th Oct 2025663 AMAQI
14th Oct 2025624 AMAQI
14th Oct 2025675 AMAQI

28°C25/32°C

14th Oct 2025676 AMAQI
14th Oct 2025647 AMAQI
14th Oct 2025758 AMAQI
14th Oct 2025799 AMAQI
14th Oct 20258210 AMAQI
14th Oct 202510011 AMAQI
14th Oct 20259812 PMAQI
14th Oct 2025941 PMAQI
14th Oct 2025952 PMAQI
14th Oct 2025963 PMAQI
14th Oct 2025604 PMAQI
14th Oct 2025585 PMAQI
14th Oct 2025716 PMAQI
14th Oct 2025727 PMAQI
14th Oct 2025598 PMAQI
14th Oct 2025599 PMAQI
14th Oct 20256110 PMAQI
14th Oct 20256111 PMAQI
15th Oct 20257012 AMAQI
15th Oct 2025721 AMAQI
15th Oct 2025792 AMAQI
15th Oct 20251013 AMAQI
15th Oct 2025944 AMAQI
15th Oct 2025905 AMAQI

28°C25/32°C

15th Oct 2025876 AMAQI
15th Oct 2025817 AMAQI
15th Oct 2025828 AMAQI
15th Oct 2025829 AMAQI
15th Oct 20257210 AMAQI
15th Oct 20256811 AMAQI
15th Oct 20256512 PMAQI
15th Oct 2025611 PMAQI
15th Oct 2025612 PMAQI
15th Oct 2025483 PMAQI
15th Oct 2025454 PMAQI
15th Oct 2025465 PMAQI
15th Oct 2025446 PMAQI
15th Oct 2025457 PMAQI
15th Oct 2025618 PMAQI
15th Oct 2025659 PMAQI
15th Oct 20256310 PMAQI
15th Oct 20257611 PMAQI
16th Oct 20257812 AMAQI
16th Oct 2025771 AMAQI
16th Oct 2025692 AMAQI
16th Oct 2025673 AMAQI
16th Oct 2025654 AMAQI
16th Oct 2025605 AMAQI

28°C25/32°C

16th Oct 2025596 AMAQI
16th Oct 2025647 AMAQI
16th Oct 2025698 AMAQI
16th Oct 2025699 AMAQI
16th Oct 20256710 AMAQI
16th Oct 20256811 AMAQI
16th Oct 20257012 PMAQI
16th Oct 2025661 PMAQI
16th Oct 2025612 PMAQI
16th Oct 2025633 PMAQI
16th Oct 2025564 PMAQI
16th Oct 2025535 PMAQI
16th Oct 2025536 PMAQI
16th Oct 2025537 PMAQI
16th Oct 2025628 PMAQI
16th Oct 2025579 PMAQI
16th Oct 20256110 PMAQI
16th Oct 20256411 PMAQI
17th Oct 20256912 AMAQI
17th Oct 2025751 AMAQI
17th Oct 2025722 AMAQI
17th Oct 2025713 AMAQI
17th Oct 2025754 AMAQI
17th Oct 2025765 AMAQI

28°C25/32°C

17th Oct 2025806 AMAQI
6 AM
17th Oct 2025767 AMAQI
17th Oct 2025748 AMAQI
17th Oct 2025749 AMAQI
17th Oct 20257710 AMAQI
17th Oct 20257311 AMAQI
17th Oct 20257212 PMAQI
12 PM
17th Oct 2025731 PMAQI
17th Oct 2025682 PMAQI
17th Oct 2025563 PMAQI
17th Oct 2025584 PMAQI
17th Oct 2025565 PMAQI
6 PM
12 AM
5 AM

--°C/°C

Day time
Avg. Highest Time
7 AM - 12 PM

61AQI

6 hours / Day
180 hours / Month
Avg. Lowest Time
4 PM - 6 PM

55AQI

3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 7 AM to 12 PM (Avg. 61), while the lowest AQI was between 4 PM to 6 PM (Avg. 55).
Night time
Avg. Highest Time
12 AM - 5 AM

62AQI

6 hours / Day
180 hours / Month
Avg. Lowest Time
7 PM

56AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 5 AM (Avg. 62), while the lowest AQI was between 7 PM to 7 PM (Avg. 56).

2025 Days Vs Air Quality

Western Water Catchment, West Region, Singapore

2025

35%

100

65%

189

Total number of days with different AQI categories in last 290 days in 2025 (75 days remaining)

Good
100 Days
Moderate
189 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 35%

Health Risk Level:

High

In 2025, 35% of 290 days were within WHO’s safe air quality limits. The risk of health issues is High, with respiratory problems, heart disease, skin issues, and stress being more common, particularly among children and the elderly.

Annual Air Quality Insights

Western Water Catchment, West Region, Singapore

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
49AQI
2nd January 2025
56AQI
3rd January 2025
55AQI
4th January 2025
50AQI
5th January 2025
49AQI
6th January 2025
48AQI
7th January 2025
54AQI
8th January 2025
52AQI
9th January 2025
58AQI
10th January 2025
52AQI
11th January 2025
42AQI
12th January 2025
47AQI
13th January 2025
45AQI
14th January 2025
54AQI
15th January 2025
75AQI
16th January 2025
48AQI
17th January 2025
45AQI
18th January 2025
44AQI
19th January 2025
45AQI
20th January 2025
45AQI
21st January 2025
47AQI
22nd January 2025
58AQI
23rd January 2025
52AQI
24th January 2025
53AQI
25th January 2025
49AQI
26th January 2025
49AQI
27th January 2025
44AQI
28th January 2025
54AQI
29th January 2025
51AQI
30th January 2025
53AQI
31st January 2025
52AQI
1st February 2025
54AQI
2nd February 2025
57AQI
3rd February 2025
64AQI
4th February 2025
51AQI
5th February 2025
51AQI
6th February 2025
61AQI
7th February 2025
53AQI
8th February 2025
53AQI
9th February 2025
50AQI
10th February 2025
52AQI
11th February 2025
45AQI
12th February 2025
57AQI
13th February 2025
56AQI
14th February 2025
51AQI
15th February 2025
56AQI
16th February 2025
49AQI
17th February 2025
53AQI
18th February 2025
45AQI
19th February 2025
52AQI
20th February 2025
52AQI
21st February 2025
51AQI
22nd February 2025
49AQI
23rd February 2025
47AQI
24th February 2025
43AQI
25th February 2025
46AQI
26th February 2025
49AQI
27th February 2025
44AQI
28th February 2025
49AQI
1st March 2025
50AQI
2nd March 2025
45AQI
3rd March 2025
57AQI
4th March 2025
56AQI
5th March 2025
60AQI
6th March 2025
41AQI
7th March 2025
56AQI
8th March 2025
46AQI
9th March 2025
46AQI
10th March 2025
44AQI
11th March 2025
40AQI
12th March 2025
41AQI
13th March 2025
44AQI
14th March 2025
37AQI
15th March 2025
44AQI
16th March 2025
38AQI
17th March 2025
39AQI
18th March 2025
45AQI
19th March 2025
41AQI
20th March 2025
38AQI
21st March 2025
53AQI
22nd March 2025
48AQI
23rd March 2025
41AQI
24th March 2025
51AQI
25th March 2025
63AQI
26th March 2025
71AQI
27th March 2025
68AQI
28th March 2025
59AQI
29th March 2025
70AQI
30th March 2025
64AQI
31st March 2025
62AQI
1st April 2025
60AQI
2nd April 2025
48AQI
3rd April 2025
49AQI
4th April 2025
49AQI
5th April 2025
45AQI
6th April 2025
44AQI
7th April 2025
38AQI
8th April 2025
49AQI
9th April 2025
43AQI
10th April 2025
55AQI
11th April 2025
44AQI
12th April 2025
49AQI
13th April 2025
40AQI
14th April 2025
45AQI
15th April 2025
42AQI
16th April 2025
50AQI
17th April 2025
41AQI
18th April 2025
53AQI
19th April 2025
42AQI
20th April 2025
41AQI
21st April 2025
46AQI
22nd April 2025
52AQI
23rd April 2025
49AQI
24th April 2025
54AQI
25th April 2025
60AQI
26th April 2025
52AQI
27th April 2025
56AQI
28th April 2025
50AQI
29th April 2025
53AQI
30th April 2025
45AQI
1st May 2025
49AQI
2nd May 2025
52AQI
3rd May 2025
45AQI
4th May 2025
43AQI
5th May 2025
48AQI
6th May 2025
48AQI
7th May 2025
56AQI
8th May 2025
55AQI
9th May 2025
52AQI
10th May 2025
57AQI
11th May 2025
46AQI
12th May 2025
52AQI
13th May 2025
56AQI
14th May 2025
52AQI
15th May 2025
58AQI
16th May 2025
52AQI
17th May 2025
56AQI
18th May 2025
48AQI
19th May 2025
52AQI
20th May 2025
51AQI
21st May 2025
51AQI
22nd May 2025
52AQI
23rd May 2025
46AQI
24th May 2025
50AQI
25th May 2025
50AQI
26th May 2025
47AQI
27th May 2025
51AQI
28th May 2025
51AQI
29th May 2025
49AQI
30th May 2025
54AQI
31st May 2025
53AQI
1st June 2025
51AQI
2nd June 2025
52AQI
3rd June 2025
56AQI
4th June 2025
58AQI
5th June 2025
60AQI
6th June 2025
49AQI
7th June 2025
52AQI
8th June 2025
46AQI
9th June 2025
50AQI
10th June 2025
43AQI
11th June 2025
48AQI
12th June 2025
54AQI
13th June 2025
49AQI
14th June 2025
47AQI
15th June 2025
43AQI
16th June 2025
43AQI
17th June 2025
47AQI
18th June 2025
45AQI
19th June 2025
46AQI
20th June 2025
51AQI
21st June 2025
54AQI
22nd June 2025
57AQI
23rd June 2025
56AQI
24th June 2025
54AQI
25th June 2025
53AQI
26th June 2025
56AQI
27th June 2025
59AQI
28th June 2025
58AQI
29th June 2025
53AQI
30th June 2025
56AQI
1st July 2025
54AQI
2nd July 2025
53AQI
3rd July 2025
57AQI
4th July 2025
56AQI
5th July 2025
55AQI
6th July 2025
54AQI
7th July 2025
53AQI
8th July 2025
54AQI
9th July 2025
52AQI
10th July 2025
52AQI
11th July 2025
54AQI
12th July 2025
53AQI
13th July 2025
54AQI
14th July 2025
54AQI
15th July 2025
54AQI
16th July 2025
56AQI
17th July 2025
55AQI
18th July 2025
57AQI
19th July 2025
58AQI
20th July 2025
58AQI
21st July 2025
58AQI
22nd July 2025
61AQI
23rd July 2025
65AQI
24th July 2025
64AQI
25th July 2025
64AQI
26th July 2025
61AQI
27th July 2025
60AQI
28th July 2025
59AQI
29th July 2025
64AQI
30th July 2025
63AQI
31st July 2025
60AQI
1st August 2025
57AQI
2nd August 2025
56AQI
3rd August 2025
55AQI
4th August 2025
55AQI
5th August 2025
52AQI
6th August 2025
54AQI
7th August 2025
61AQI
8th August 2025
65AQI
9th August 2025
65AQI
10th August 2025
66AQI
11th August 2025
61AQI
12th August 2025
60AQI
13th August 2025
56AQI
14th August 2025
57AQI
15th August 2025
55AQI
16th August 2025
59AQI
17th August 2025
58AQI
18th August 2025
58AQI
19th August 2025
57AQI
20th August 2025
59AQI
21st August 2025
60AQI
22nd August 2025
67AQI
23rd August 2025
63AQI
24th August 2025
61AQI
25th August 2025
57AQI
26th August 2025
59AQI
27th August 2025
66AQI
28th August 2025
62AQI
29th August 2025
64AQI
30th August 2025
62AQI
31st August 2025
58AQI
1st September 2025
54AQI
2nd September 2025
52AQI
3rd September 2025
52AQI
4th September 2025
41AQI
5th September 2025
45AQI
6th September 2025
49AQI
7th September 2025
49AQI
8th September 2025
55AQI
9th September 2025
52AQI
10th September 2025
54AQI
11th September 2025
51AQI
12th September 2025
49AQI
13th September 2025
44AQI
14th September 2025
53AQI
15th September 2025
52AQI
16th September 2025
56AQI
17th September 2025
46AQI
18th September 2025
54AQI
19th September 2025
54AQI
20th September 2025
56AQI
21st September 2025
52AQI
22nd September 2025
52AQI
23rd September 2025
55AQI
24th September 2025
58AQI
25th September 2025
61AQI
26th September 2025
82AQI
27th September 2025
68AQI
28th September 2025
66AQI
29th September 2025
36AQI
30th September 2025
45AQI
1st October 2025
46AQI
2nd October 2025
54AQI
3rd October 2025
59AQI
4th October 2025
56AQI
5th October 2025
66AQI
6th October 2025
71AQI
7th October 2025
75AQI
8th October 2025
70AQI
9th October 2025
65AQI
10th October 2025
58AQI
11th October 2025
64AQI
12th October 2025
68AQI
13th October 2025
64AQI
14th October 2025
74AQI
15th October 2025
68AQI
16th October 2025
68AQI
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

51AQI

51AQI

50AQI

48AQI

51AQI

52AQI

57AQI

60AQI

53AQI

64AQI

No. of days

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

202553AQI

16
15
11
17
18
13
21
9
12
19
12
18
31
31
9
21
1
15
100
189

Highest AQI recorded in

October

64AQI

Lowest AQI recorded in

April

48AQI

202450AQI

31
24
5
22
9
22
8
22
9
13
17
4
27
11
20
8
22
11
20
18
12
22
9
208
158

Highest AQI recorded in

July

65AQI

Lowest AQI recorded in

January

33AQI

202334AQI

29
2
28
31
28
2
30
1
28
2
29
2
28
3
23
7
15
16
24
5
30
1
323
41

Highest AQI recorded in

October

50AQI

Lowest AQI recorded in

July

28AQI

202237AQI

3
21
27
4
21
9
21
10
21
9
18
4
1
20
8
31
29
1
30
1
242
47

Highest AQI recorded in

August

61AQI

Lowest AQI recorded in

January

21AQI

202142AQI

27
4
20
8
24
7
15
15
26
5
18
12
22
9
28
3
26
4
17
14
24
6
30
1
277
88

Highest AQI recorded in

April

50AQI

Lowest AQI recorded in

January

33AQI

202036AQI

12
1
18
3
16
2
30
29
2
24
7
26
4
25
6
30
28
3
238
28

Highest AQI recorded in

April

43AQI

Lowest AQI recorded in

November

31AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2025(Avg.)
53AQI
Least Polluted Year Recorded
2023(Avg.)
34AQI

Western Water Catchment's annual 2025 AQI (53) shows an average percentage change of 35.6% (worsened AQI) compared to previous years: 2020 (36), 2021 (42), 2022 (37), 2023 (34), 2024 (50).