Altzaga, Pais Vasco, Spain 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
Altzaga, Pais Vasco, Spain
AQI Trends: Highest and Lowest
Same Day Analysis (20th September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 49 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 21st Sep - 22nd Sep 2025
Altzaga, Pais Vasco, Spain
7 AM21st Sep 2025
8 PM
6 AM22nd Sep 2025
24AQI
14AQI
23AQI
21AQI
In the last 24 hours,
Altzaga's AQI reached its highest point of 24 at 7 PM during the Day, while the lowest point, undefined, was recorded at 6 AM during the Night between 21st Sep and 22nd Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Altzaga, Pais Vasco, Spain
20°C15/25°C
21°C17/27°C
22°C19/27°C
20°C18/23°C
18°C17/21°C
18°C16/22°C
19°C15/24°C
21°C17/26°C
18°C15/20°C
17°C15/21°C
19°C15/25°C
21°C17/27°C
18°C16/21°C
18°C14/23°C
24°C17/34°C
22°C18/28°C
16°C15/17°C
17°C15/20°C
17°C15/19°C
18°C16/22°C
18°C17/19°C
18°C15/22°C
20°C15/26°C
18°C17/21°C
18°C16/23°C
20°C15/25°C
21°C16/29°C
24°C19/32°C
21°C17/26°C
14°C13/16°C
--°C/°C
32AQI
29AQI
31AQI
29AQI
2025 Days Vs Air Quality
Altzaga, Pais Vasco, Spain
67%
77
33%
38
Total number of days with different AQI categories in last 265 days in 2025 (100 days remaining)
Under WHO’s Safe Air Quality Limits: 67%
Health Risk Level:
Moderate
In 2025, 67% of 265 days were within WHO’s safe air quality limits, and 33% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.
Annual Air Quality Insights
Altzaga, Pais Vasco, Spain
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
52AQI
51AQI
50AQI
45AQI
47AQI
55AQI
52AQI
44AQI
43AQI
40AQI
53AQI
63AQI
66AQI
66AQI
64AQI
68AQI
60AQI
52AQI
49AQI
52AQI
54AQI
56AQI
57AQI
58AQI
60AQI
57AQI
57AQI
56AQI
54AQI
51AQI
52AQI
51AQI
52AQI
52AQI
47AQI
48AQI
46AQI
45AQI
41AQI
39AQI
38AQI
37AQI
40AQI
46AQI
50AQI
51AQI
47AQI
38AQI
43AQI
50AQI
42AQI
30AQI
28AQI
25AQI
24AQI
22AQI
20AQI
33AQI
46AQI
48AQI
35AQI
28AQI
24AQI
22AQI
25AQI
25AQI
27AQI
31AQI
36AQI
30AQI
35AQI
37AQI
29AQI
35AQI
49AQI
57AQI
58AQI
59AQI
57AQI
54AQI
56AQI
53AQI
51AQI
40AQI
36AQI
34AQI
32AQI
35AQI
39AQI
45AQI
38AQI
35AQI
29AQI
22AQI
21AQI
23AQI
23AQI
27AQI
27AQI
25AQI
26AQI
28AQI
25AQI
23AQI
24AQI
29AQI
26AQI
27AQI
24AQI
22AQI
27AQI
29AQI
51AQI
58AQI
49AQI
51AQI
54AQI
38AQI
39AQI
30AQI
No. of days
202542AQI
Highest AQI recorded in
June54AQI
Lowest AQI recorded in
September30AQI
Most & Least Polluted Years Over the Last 1 Years
Altzaga's annual 2025 AQI (42) shows an average percentage change of NaN% (improved AQI) compared to previous years: .