A4S, Dungarvan, Waterford, 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
A4S, Dungarvan, Waterford, Ireland
AQI Trends: Highest and Lowest
Same Day Analysis (20th September ):
On this day, AQI across the 2 years varied significantly: 2025 ranks 1st highest AQI at 18 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 20th Sep - 21st Sep 2025
A4S, Dungarvan, Waterford, Ireland
6 AM20th Sep 2025
8 PM
5 AM21st Sep 2025
19AQI
16AQI
18AQI
16AQI
In the last 24 hours,
A4S's AQI reached its highest point of 19 at 2 PM during the Day, while the lowest point, 16, was recorded at 4 AM during the Night between 20th Sep and 21st Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
A4S, Dungarvan, Waterford, Ireland
16°C10/21°C
18°C13/22°C
16°C13/21°C
17°C13/22°C
15°C11/20°C
14°C11/18°C
14°C11/17°C
14°C11/18°C
14°C10/19°C
14°C12/17°C
13°C9/16°C
13°C8/17°C
14°C10/17°C
12°C8/18°C
13°C9/18°C
15°C13/17°C
14°C8/17°C
12°C7/17°C
14°C11/18°C
13°C10/16°C
11°C9/13°C
10°C7/15°C
10°C7/14°C
13°C7/18°C
13°C11/15°C
12°C8/15°C
15°C10/18°C
14°C9/17°C
14°C12/15°C
11°C8/14°C
--°C/°C
22AQI
20AQI
22AQI
21AQI
2025 Days Vs Air Quality
A4S, Dungarvan, Waterford, Ireland
86%
227
14%
36
Total number of days with different AQI categories in last 264 days in 2025 (101 days remaining)
Under WHO’s Safe Air Quality Limits: 86%
Health Risk Level:
Low
In 2025, 86% of 264 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
A4S, Dungarvan, Waterford, Ireland
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
24AQI
34AQI
57AQI
72AQI
43AQI
21AQI
22AQI
53AQI
58AQI
71AQI
39AQI
67AQI
44AQI
26AQI
28AQI
39AQI
31AQI
31AQI
39AQI
43AQI
52AQI
53AQI
41AQI
39AQI
37AQI
39AQI
47AQI
38AQI
25AQI
28AQI
35AQI
57AQI
35AQI
37AQI
34AQI
27AQI
54AQI
43AQI
46AQI
51AQI
60AQI
50AQI
51AQI
55AQI
58AQI
53AQI
46AQI
63AQI
64AQI
63AQI
36AQI
52AQI
42AQI
39AQI
45AQI
35AQI
28AQI
27AQI
44AQI
37AQI
38AQI
30AQI
35AQI
30AQI
45AQI
46AQI
42AQI
57AQI
71AQI
77AQI
35AQI
27AQI
34AQI
35AQI
38AQI
28AQI
33AQI
60AQI
66AQI
59AQI
54AQI
27AQI
26AQI
26AQI
27AQI
22AQI
21AQI
28AQI
32AQI
40AQI
33AQI
45AQI
47AQI
55AQI
53AQI
41AQI
38AQI
44AQI
52AQI
56AQI
54AQI
56AQI
43AQI
20AQI
17AQI
16AQI
19AQI
17AQI
20AQI
37AQI
34AQI
20AQI
18AQI
20AQI
19AQI
19AQI
23AQI
28AQI
29AQI
47AQI
57AQI
43AQI
27AQI
22AQI
20AQI
19AQI
23AQI
28AQI
32AQI
36AQI
34AQI
23AQI
34AQI
33AQI
36AQI
36AQI
38AQI
33AQI
34AQI
39AQI
29AQI
25AQI
25AQI
22AQI
22AQI
20AQI
17AQI
16AQI
20AQI
22AQI
18AQI
23AQI
24AQI
22AQI
25AQI
18AQI
15AQI
15AQI
22AQI
56AQI
36AQI
23AQI
24AQI
33AQI
29AQI
24AQI
24AQI
30AQI
25AQI
23AQI
26AQI
33AQI
34AQI
25AQI
21AQI
19AQI
17AQI
18AQI
18AQI
19AQI
18AQI
16AQI
17AQI
16AQI
18AQI
17AQI
16AQI
16AQI
17AQI
18AQI
18AQI
20AQI
20AQI
22AQI
22AQI
20AQI
19AQI
19AQI
19AQI
17AQI
17AQI
17AQI
16AQI
17AQI
34AQI
46AQI
32AQI
28AQI
24AQI
18AQI
17AQI
19AQI
19AQI
21AQI
21AQI
22AQI
25AQI
29AQI
28AQI
23AQI
23AQI
27AQI
30AQI
47AQI
55AQI
42AQI
36AQI
40AQI
40AQI
35AQI
37AQI
29AQI
23AQI
23AQI
25AQI
25AQI
27AQI
30AQI
28AQI
23AQI
21AQI
20AQI
22AQI
24AQI
22AQI
19AQI
17AQI
18AQI
18AQI
23AQI
22AQI
20AQI
20AQI
21AQI
19AQI
18AQI
19AQI
23AQI
22AQI
19AQI
21AQI
20AQI
18AQI
41AQI
46AQI
40AQI
34AQI
28AQI
25AQI
20AQI
29AQI
20AQI
No. of days
202532AQI
Highest AQI recorded in
February46AQI
Lowest AQI recorded in
September20AQI
202442AQI
Highest AQI recorded in
January59AQI
Lowest AQI recorded in
July21AQI
202361AQI
Highest AQI recorded in
January69AQI
Lowest AQI recorded in
May45AQI
202275AQI
Highest AQI recorded in
December86AQI
Lowest AQI recorded in
November63AQI
Most & Least Polluted Years Over the Last 4 Years
A4S's annual 2025 AQI (32) shows an average percentage change of -42.7% (improved AQI) compared to previous years: 2022 (75), 2023 (61), 2024 (42).