Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Perai, Butterworth, Pulau Pinang, Malaysia Historical Air Quality Analysis

Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!

Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+

September Air Quality Analysis

Perai, Butterworth, Pulau Pinang, Malaysia

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
27th Sep 2025
67AQI
Lowest AQI recorded on
10th Sep 2021
0AQI

Same Day Analysis (30th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 50 of Good air quality on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

2025 Days Vs Air Quality

Perai, Butterworth, Pulau Pinang, Malaysia

2025

35%

95

65%

179

Total number of days with different AQI categories in last 274 days in 2025 (91 days remaining)

Good
95 Days
Moderate
179 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 274 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

Perai, Butterworth, Pulau Pinang, Malaysia

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
58AQI
2nd January 2025
59AQI
3rd January 2025
58AQI
4th January 2025
58AQI
5th January 2025
58AQI
6th January 2025
58AQI
7th January 2025
57AQI
8th January 2025
58AQI
9th January 2025
57AQI
10th January 2025
57AQI
11th January 2025
57AQI
12th January 2025
56AQI
13th January 2025
56AQI
14th January 2025
57AQI
15th January 2025
58AQI
16th January 2025
57AQI
17th January 2025
56AQI
18th January 2025
57AQI
19th January 2025
59AQI
20th January 2025
58AQI
21st January 2025
60AQI
22nd January 2025
61AQI
23rd January 2025
61AQI
24th January 2025
61AQI
25th January 2025
64AQI
26th January 2025
65AQI
27th January 2025
63AQI
28th January 2025
63AQI
29th January 2025
61AQI
30th January 2025
62AQI
31st January 2025
62AQI
1st February 2025
62AQI
2nd February 2025
64AQI
3rd February 2025
65AQI
4th February 2025
65AQI
5th February 2025
66AQI
6th February 2025
69AQI
7th February 2025
70AQI
8th February 2025
69AQI
9th February 2025
69AQI
10th February 2025
69AQI
11th February 2025
70AQI
12th February 2025
69AQI
13th February 2025
69AQI
14th February 2025
68AQI
15th February 2025
69AQI
16th February 2025
68AQI
17th February 2025
67AQI
18th February 2025
66AQI
19th February 2025
65AQI
20th February 2025
64AQI
21st February 2025
62AQI
22nd February 2025
62AQI
23rd February 2025
61AQI
24th February 2025
60AQI
25th February 2025
59AQI
26th February 2025
58AQI
27th February 2025
58AQI
28th February 2025
58AQI
1st March 2025
58AQI
2nd March 2025
58AQI
3rd March 2025
57AQI
4th March 2025
57AQI
5th March 2025
57AQI
6th March 2025
57AQI
7th March 2025
56AQI
8th March 2025
55AQI
9th March 2025
55AQI
10th March 2025
54AQI
11th March 2025
54AQI
12th March 2025
54AQI
13th March 2025
54AQI
14th March 2025
53AQI
15th March 2025
52AQI
16th March 2025
52AQI
17th March 2025
51AQI
18th March 2025
52AQI
19th March 2025
53AQI
20th March 2025
53AQI
21st March 2025
54AQI
22nd March 2025
55AQI
23rd March 2025
56AQI
24th March 2025
56AQI
25th March 2025
57AQI
26th March 2025
58AQI
27th March 2025
58AQI
28th March 2025
59AQI
29th March 2025
59AQI
30th March 2025
60AQI
31st March 2025
59AQI
1st April 2025
58AQI
2nd April 2025
57AQI
3rd April 2025
55AQI
4th April 2025
55AQI
5th April 2025
54AQI
6th April 2025
54AQI
7th April 2025
53AQI
8th April 2025
53AQI
9th April 2025
53AQI
10th April 2025
52AQI
11th April 2025
52AQI
12th April 2025
52AQI
13th April 2025
51AQI
14th April 2025
51AQI
15th April 2025
49AQI
16th April 2025
49AQI
17th April 2025
50AQI
18th April 2025
49AQI
19th April 2025
49AQI
20th April 2025
49AQI
21st April 2025
50AQI
22nd April 2025
50AQI
23rd April 2025
50AQI
24th April 2025
49AQI
25th April 2025
49AQI
26th April 2025
48AQI
27th April 2025
48AQI
28th April 2025
48AQI
29th April 2025
48AQI
30th April 2025
48AQI
1st May 2025
48AQI
2nd May 2025
47AQI
3rd May 2025
44AQI
4th May 2025
46AQI
5th May 2025
47AQI
6th May 2025
49AQI
7th May 2025
50AQI
8th May 2025
53AQI
9th May 2025
51AQI
10th May 2025
51AQI
11th May 2025
52AQI
12th May 2025
49AQI
13th May 2025
49AQI
14th May 2025
50AQI
15th May 2025
52AQI
16th May 2025
53AQI
17th May 2025
55AQI
18th May 2025
54AQI
19th May 2025
53AQI
20th May 2025
52AQI
21st May 2025
51AQI
22nd May 2025
51AQI
23rd May 2025
49AQI
24th May 2025
46AQI
25th May 2025
44AQI
26th May 2025
42AQI
27th May 2025
42AQI
28th May 2025
44AQI
29th May 2025
46AQI
30th May 2025
49AQI
31st May 2025
52AQI
1st June 2025
53AQI
2nd June 2025
53AQI
3rd June 2025
53AQI
4th June 2025
52AQI
5th June 2025
52AQI
6th June 2025
51AQI
7th June 2025
49AQI
8th June 2025
45AQI
9th June 2025
46AQI
10th June 2025
46AQI
11th June 2025
45AQI
12th June 2025
48AQI
13th June 2025
52AQI
14th June 2025
54AQI
15th June 2025
54AQI
16th June 2025
55AQI
17th June 2025
52AQI
18th June 2025
47AQI
19th June 2025
45AQI
20th June 2025
42AQI
21st June 2025
41AQI
22nd June 2025
38AQI
23rd June 2025
38AQI
24th June 2025
37AQI
25th June 2025
38AQI
26th June 2025
39AQI
27th June 2025
41AQI
28th June 2025
43AQI
29th June 2025
44AQI
30th June 2025
45AQI
1st July 2025
46AQI
2nd July 2025
44AQI
3rd July 2025
46AQI
4th July 2025
45AQI
5th July 2025
45AQI
6th July 2025
44AQI
7th July 2025
45AQI
8th July 2025
45AQI
9th July 2025
45AQI
10th July 2025
45AQI
11th July 2025
44AQI
12th July 2025
44AQI
13th July 2025
44AQI
14th July 2025
45AQI
15th July 2025
44AQI
16th July 2025
45AQI
17th July 2025
47AQI
18th July 2025
46AQI
19th July 2025
48AQI
20th July 2025
49AQI
21st July 2025
49AQI
22nd July 2025
49AQI
23rd July 2025
50AQI
24th July 2025
51AQI
25th July 2025
51AQI
26th July 2025
51AQI
27th July 2025
52AQI
28th July 2025
52AQI
29th July 2025
53AQI
30th July 2025
53AQI
31st July 2025
54AQI
1st August 2025
55AQI
2nd August 2025
54AQI
3rd August 2025
60AQI
4th August 2025
58AQI
5th August 2025
54AQI
6th August 2025
60AQI
7th August 2025
64AQI
8th August 2025
65AQI
9th August 2025
62AQI
10th August 2025
50AQI
11th August 2025
50AQI
12th August 2025
50AQI
13th August 2025
53AQI
14th August 2025
56AQI
15th August 2025
53AQI
16th August 2025
57AQI
17th August 2025
60AQI
18th August 2025
63AQI
19th August 2025
63AQI
20th August 2025
60AQI
21st August 2025
59AQI
22nd August 2025
64AQI
23rd August 2025
56AQI
24th August 2025
54AQI
25th August 2025
58AQI
26th August 2025
58AQI
27th August 2025
65AQI
28th August 2025
56AQI
29th August 2025
58AQI
30th August 2025
54AQI
31st August 2025
56AQI
1st September 2025
54AQI
2nd September 2025
52AQI
3rd September 2025
52AQI
4th September 2025
46AQI
5th September 2025
44AQI
6th September 2025
52AQI
7th September 2025
52AQI
8th September 2025
56AQI
9th September 2025
51AQI
10th September 2025
53AQI
11th September 2025
52AQI
12th September 2025
47AQI
13th September 2025
48AQI
14th September 2025
51AQI
15th September 2025
44AQI
16th September 2025
47AQI
17th September 2025
44AQI
18th September 2025
49AQI
19th September 2025
52AQI
20th September 2025
49AQI
21st September 2025
48AQI
22nd September 2025
51AQI
23rd September 2025
48AQI
24th September 2025
49AQI
25th September 2025
39AQI
26th September 2025
63AQI
27th September 2025
67AQI
28th September 2025
41AQI
29th September 2025
38AQI
30th September 2025
50AQI
1st October 2025
71AQI
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

59AQI

65AQI

56AQI

51AQI

49AQI

47AQI

47AQI

58AQI

50AQI

71AQI

No. of days

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

202553AQI

31
28
31
16
14
18
13
19
11
23
8
3
28
16
14
1
95
179

Highest AQI recorded in

October

71AQI

Lowest AQI recorded in

June

47AQI

202424AQI

30
28
30
30
20
10
2
28
3
28
26
5
30
30
1
22
8
31
251
111

Highest AQI recorded in

June

58AQI

Lowest AQI recorded in

September

0AQI

20230AQI

17
31
30
30
29
31
31
30
31
28
30
318

Highest AQI recorded in

February

0AQI

Lowest AQI recorded in

December

0AQI

20220AQI

25
20
31
29
31
30
21
1
25
30
21
264

Highest AQI recorded in

January

0AQI

Lowest AQI recorded in

November

0AQI

202123AQI

5
26
28
28
12
18
15
4
30
31
22
21
30
28
20
214
104

Highest AQI recorded in

February

63AQI

Lowest AQI recorded in

December

0AQI

202055AQI

9
6
15
8
10
7
23
5
26
1
30
5
23
15
16
15
15
12
19
74
186

Highest AQI recorded in

August

69AQI

Lowest AQI recorded in

May

48AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2020(Avg.)
55AQI
Least Polluted Year Recorded
2022(Avg.)
0AQI

Perai's annual 2025 AQI (53) shows an average percentage change of 91.9% (worsened AQI) compared to previous years: 2020 (55), 2021 (23), 2022 (0), 2023 (0), 2024 (24).