Swords, Fingal, 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
Swords, Fingal, Ireland
AQI Trends: Highest and Lowest
Same Day Analysis (18th September ):
On this day, AQI across the 4 years varied significantly: 2025 ranks 4th highest AQI at 20 of Good air quality, showing improvement over 2024, 2023 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 18th Sep - 19th Sep 2025
Swords, Fingal, Ireland
6 AM18th Sep 2025
8 PM
5 AM19th Sep 2025
25AQI
19AQI
22AQI
19AQI
In the last 24 hours,
Swords's AQI reached its highest point of 25 at 9 AM during the Day, while the lowest point, undefined, was recorded at 5 AM during the Night between 18th Sep and 19th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Swords, Fingal, Ireland
14°C11/15°C
13°C9/17°C
16°C11/20°C
17°C16/21°C
17°C14/21°C
18°C14/23°C
16°C13/20°C
16°C12/20°C
14°C13/17°C
15°C13/18°C
14°C11/19°C
15°C13/18°C
14°C11/17°C
14°C9/18°C
14°C10/16°C
13°C9/17°C
14°C10/18°C
16°C12/18°C
16°C11/17°C
13°C8/17°C
14°C11/16°C
14°C11/16°C
12°C10/14°C
12°C9/15°C
11°C9/15°C
12°C8/17°C
13°C12/14°C
13°C9/16°C
16°C12/19°C
15°C10/20°C
--°C/°C
21AQI
20AQI
21AQI
20AQI
2025 Days Vs Air Quality
Swords, Fingal, Ireland
91%
237
9%
24
Total number of days with different AQI categories in last 262 days in 2025 (103 days remaining)
Under WHO’s Safe Air Quality Limits: 91%
Health Risk Level:
Very Low
In 2025, 91% of 262 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Swords, Fingal, Ireland
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
21AQI
24AQI
37AQI
36AQI
28AQI
19AQI
20AQI
34AQI
62AQI
58AQI
36AQI
49AQI
31AQI
19AQI
23AQI
40AQI
32AQI
42AQI
46AQI
53AQI
44AQI
34AQI
30AQI
27AQI
26AQI
22AQI
33AQI
32AQI
22AQI
24AQI
30AQI
52AQI
30AQI
25AQI
21AQI
21AQI
48AQI
44AQI
34AQI
33AQI
45AQI
35AQI
42AQI
46AQI
48AQI
45AQI
42AQI
51AQI
59AQI
58AQI
30AQI
30AQI
26AQI
28AQI
29AQI
25AQI
23AQI
22AQI
35AQI
29AQI
34AQI
24AQI
24AQI
23AQI
35AQI
44AQI
45AQI
62AQI
76AQI
52AQI
25AQI
24AQI
27AQI
32AQI
29AQI
20AQI
34AQI
59AQI
66AQI
63AQI
58AQI
27AQI
22AQI
23AQI
31AQI
22AQI
20AQI
25AQI
38AQI
43AQI
35AQI
36AQI
48AQI
63AQI
58AQI
46AQI
39AQI
48AQI
60AQI
53AQI
57AQI
56AQI
38AQI
16AQI
17AQI
16AQI
16AQI
21AQI
30AQI
49AQI
29AQI
19AQI
21AQI
33AQI
33AQI
34AQI
17AQI
19AQI
29AQI
43AQI
57AQI
36AQI
23AQI
18AQI
17AQI
19AQI
22AQI
25AQI
25AQI
33AQI
32AQI
33AQI
37AQI
31AQI
30AQI
28AQI
26AQI
29AQI
29AQI
30AQI
29AQI
25AQI
28AQI
23AQI
17AQI
18AQI
15AQI
15AQI
14AQI
16AQI
16AQI
18AQI
20AQI
20AQI
22AQI
17AQI
14AQI
14AQI
26AQI
55AQI
41AQI
34AQI
30AQI
28AQI
27AQI
22AQI
22AQI
31AQI
27AQI
28AQI
26AQI
35AQI
35AQI
25AQI
21AQI
17AQI
16AQI
16AQI
16AQI
17AQI
18AQI
15AQI
16AQI
15AQI
18AQI
17AQI
16AQI
16AQI
18AQI
17AQI
19AQI
20AQI
22AQI
24AQI
23AQI
20AQI
19AQI
20AQI
19AQI
17AQI
18AQI
20AQI
17AQI
29AQI
50AQI
55AQI
40AQI
32AQI
26AQI
20AQI
16AQI
17AQI
19AQI
19AQI
20AQI
22AQI
23AQI
27AQI
27AQI
23AQI
23AQI
24AQI
26AQI
39AQI
52AQI
46AQI
35AQI
38AQI
39AQI
34AQI
36AQI
26AQI
21AQI
22AQI
24AQI
26AQI
29AQI
28AQI
25AQI
21AQI
19AQI
18AQI
20AQI
21AQI
21AQI
20AQI
18AQI
17AQI
17AQI
21AQI
21AQI
19AQI
19AQI
19AQI
17AQI
16AQI
17AQI
18AQI
19AQI
18AQI
20AQI
33AQI
37AQI
37AQI
36AQI
26AQI
25AQI
22AQI
27AQI
19AQI
No. of days
202529AQI
Highest AQI recorded in
February37AQI
Lowest AQI recorded in
September19AQI
202435AQI
Highest AQI recorded in
February75AQI
Lowest AQI recorded in
June17AQI
202323AQI
Highest AQI recorded in
December34AQI
Lowest AQI recorded in
July15AQI
202228AQI
Highest AQI recorded in
March47AQI
Lowest AQI recorded in
November19AQI
Most & Least Polluted Years Over the Last 4 Years
Swords's annual 2025 AQI (29) shows an average percentage change of 5.7% (worsened AQI) compared to previous years: 2022 (28), 2023 (23), 2024 (35).