Custom House Quay, Dublin, Dublin, Ireland Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
Custom House Quay, Dublin, Dublin, Ireland
AQI Trends: Highest and Lowest
Same Day Analysis (8th September ):
On this day, AQI across the 4 years varied significantly: 2025 ranks 2nd highest AQI at 21 of Good air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 8th Sep - 9th Sep 2025
Custom House Quay, Dublin, Dublin, Ireland
6 AM8th Sep 2025
8 PM
5 AM9th Sep 2025
24AQI
20AQI
24AQI
18AQI
In the last 24 hours,
Custom House Quay's AQI reached its highest point of 24 at 9 AM during the Day, while the lowest point, 18, was recorded at 5 AM during the Night between 8th Sep and 9th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Custom House Quay, Dublin, Dublin, Ireland
15°C8/21°C
18°C14/22°C
18°C14/23°C
19°C14/24°C
18°C14/22°C
16°C12/21°C
16°C12/21°C
16°C13/20°C
16°C13/19°C
15°C12/17°C
14°C10/16°C
13°C9/17°C
16°C10/20°C
17°C14/21°C
17°C13/21°C
18°C14/23°C
16°C13/20°C
15°C12/19°C
14°C12/17°C
15°C11/18°C
14°C10/18°C
15°C12/18°C
14°C10/16°C
13°C8/18°C
13°C9/16°C
12°C8/17°C
13°C9/18°C
16°C12/18°C
15°C10/17°C
12°C7/17°C
--°C/°C
27AQI
26AQI
28AQI
27AQI
2025 Days Vs Air Quality
Custom House Quay, Dublin, Dublin, Ireland
83%
209
17%
42
Total number of days with different AQI categories in last 252 days in 2025 (113 days remaining)
Under WHO’s Safe Air Quality Limits: 83%
Health Risk Level:
Low
In 2025, 83% of 252 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Custom House Quay, Dublin, Dublin, Ireland
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
22AQI
25AQI
32AQI
33AQI
24AQI
19AQI
22AQI
43AQI
72AQI
67AQI
36AQI
60AQI
31AQI
20AQI
33AQI
52AQI
44AQI
62AQI
57AQI
56AQI
48AQI
40AQI
31AQI
26AQI
25AQI
26AQI
36AQI
34AQI
24AQI
28AQI
37AQI
69AQI
30AQI
37AQI
21AQI
24AQI
59AQI
59AQI
37AQI
46AQI
54AQI
42AQI
54AQI
57AQI
65AQI
58AQI
59AQI
65AQI
71AQI
67AQI
29AQI
32AQI
28AQI
29AQI
31AQI
25AQI
23AQI
24AQI
47AQI
32AQI
39AQI
25AQI
29AQI
26AQI
46AQI
49AQI
53AQI
70AQI
88AQI
53AQI
26AQI
27AQI
35AQI
44AQI
30AQI
23AQI
44AQI
70AQI
74AQI
67AQI
58AQI
26AQI
26AQI
24AQI
35AQI
21AQI
21AQI
28AQI
40AQI
43AQI
37AQI
42AQI
54AQI
72AQI
62AQI
48AQI
49AQI
54AQI
69AQI
57AQI
60AQI
60AQI
40AQI
17AQI
20AQI
15AQI
17AQI
23AQI
36AQI
58AQI
33AQI
22AQI
24AQI
46AQI
42AQI
35AQI
19AQI
22AQI
34AQI
53AQI
64AQI
44AQI
26AQI
20AQI
17AQI
21AQI
24AQI
29AQI
32AQI
39AQI
40AQI
38AQI
43AQI
36AQI
37AQI
34AQI
34AQI
35AQI
35AQI
32AQI
32AQI
29AQI
31AQI
25AQI
19AQI
19AQI
16AQI
15AQI
15AQI
17AQI
17AQI
19AQI
21AQI
20AQI
23AQI
18AQI
15AQI
16AQI
23AQI
58AQI
42AQI
35AQI
32AQI
31AQI
28AQI
24AQI
24AQI
33AQI
29AQI
29AQI
30AQI
41AQI
41AQI
25AQI
20AQI
17AQI
16AQI
17AQI
16AQI
19AQI
18AQI
15AQI
16AQI
16AQI
19AQI
18AQI
16AQI
16AQI
18AQI
17AQI
19AQI
22AQI
25AQI
27AQI
26AQI
20AQI
19AQI
21AQI
19AQI
17AQI
18AQI
19AQI
16AQI
31AQI
55AQI
58AQI
41AQI
32AQI
27AQI
20AQI
16AQI
17AQI
20AQI
21AQI
20AQI
22AQI
24AQI
28AQI
29AQI
22AQI
24AQI
26AQI
26AQI
39AQI
53AQI
48AQI
36AQI
37AQI
38AQI
34AQI
35AQI
26AQI
20AQI
21AQI
23AQI
24AQI
28AQI
29AQI
26AQI
21AQI
21AQI
20AQI
22AQI
24AQI
24AQI
20AQI
17AQI
17AQI
17AQI
22AQI
21AQI
38AQI
44AQI
41AQI
41AQI
30AQI
26AQI
23AQI
28AQI
20AQI
No. of days
202533AQI
Highest AQI recorded in
February44AQI
Lowest AQI recorded in
September20AQI
202428AQI
Highest AQI recorded in
February36AQI
Lowest AQI recorded in
October21AQI
202311AQI
Highest AQI recorded in
November35AQI
Lowest AQI recorded in
July1AQI
20224AQI
Highest AQI recorded in
March11AQI
Lowest AQI recorded in
September1AQI
Most & Least Polluted Years Over the Last 4 Years
Custom House Quay's annual 2025 AQI (33) shows an average percentage change of 332.8% (worsened AQI) compared to previous years: 2022 (4), 2023 (11), 2024 (28).