Bassersdorf, Zurich, Switzerland 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
Bassersdorf, Zurich, Switzerland
AQI Trends: Highest and Lowest
Same Day Analysis (18th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 20 of Good air quality, showing improvement over 2024 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 19th Sep - 20th Sep 2025
Bassersdorf, Zurich, Switzerland
6 AM19th Sep 2025
7 PM
5 AM20th Sep 2025
AQI
AQI
36AQI
20AQI
In the last 24 hours,
Bassersdorf's AQI reached its highest point of 36 at 7 PM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 19th Sep and 20th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Bassersdorf, Zurich, Switzerland
15°C14/16°C
17°C13/23°C
15°C10/21°C
15°C8/21°C
16°C9/24°C
19°C12/28°C
21°C15/28°C
15°C13/17°C
15°C12/20°C
15°C11/20°C
16°C9/24°C
15°C13/22°C
15°C11/20°C
17°C11/24°C
17°C13/24°C
14°C10/19°C
13°C7/21°C
16°C9/24°C
17°C13/23°C
16°C12/21°C
13°C11/17°C
14°C11/19°C
13°C10/18°C
14°C8/20°C
15°C11/20°C
18°C14/24°C
14°C10/17°C
13°C8/17°C
17°C11/25°C
--°C/°C
--°C/°C
23AQI
21AQI
23AQI
21AQI
2025 Days Vs Air Quality
Bassersdorf, Zurich, Switzerland
77%
201
23%
60
Total number of days with different AQI categories in last 262 days in 2025 (103 days remaining)
Under WHO’s Safe Air Quality Limits: 77%
Health Risk Level:
Low
In 2025, 77% of 262 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
Bassersdorf, Zurich, Switzerland
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
72AQI
60AQI
56AQI
56AQI
54AQI
47AQI
34AQI
28AQI
26AQI
26AQI
32AQI
36AQI
38AQI
50AQI
57AQI
53AQI
54AQI
55AQI
60AQI
64AQI
64AQI
64AQI
61AQI
57AQI
51AQI
42AQI
34AQI
28AQI
28AQI
30AQI
29AQI
45AQI
52AQI
56AQI
65AQI
68AQI
69AQI
65AQI
67AQI
67AQI
72AQI
79AQI
70AQI
61AQI
60AQI
62AQI
65AQI
66AQI
67AQI
69AQI
73AQI
69AQI
65AQI
61AQI
57AQI
53AQI
39AQI
34AQI
33AQI
35AQI
40AQI
45AQI
53AQI
55AQI
57AQI
56AQI
56AQI
60AQI
56AQI
50AQI
44AQI
40AQI
37AQI
38AQI
37AQI
41AQI
38AQI
40AQI
40AQI
41AQI
40AQI
33AQI
30AQI
30AQI
41AQI
41AQI
42AQI
49AQI
47AQI
39AQI
34AQI
36AQI
43AQI
43AQI
38AQI
25AQI
22AQI
28AQI
32AQI
39AQI
45AQI
40AQI
43AQI
31AQI
30AQI
23AQI
19AQI
18AQI
19AQI
18AQI
16AQI
16AQI
19AQI
16AQI
16AQI
23AQI
31AQI
33AQI
32AQI
29AQI
36AQI
38AQI
40AQI
26AQI
19AQI
21AQI
31AQI
41AQI
45AQI
34AQI
27AQI
21AQI
19AQI
29AQI
33AQI
21AQI
20AQI
28AQI
30AQI
28AQI
24AQI
22AQI
25AQI
20AQI
19AQI
20AQI
22AQI
20AQI
17AQI
20AQI
24AQI
26AQI
24AQI
22AQI
24AQI
19AQI
17AQI
16AQI
32AQI
39AQI
54AQI
62AQI
56AQI
58AQI
58AQI
51AQI
35AQI
33AQI
36AQI
43AQI
46AQI
42AQI
42AQI
39AQI
33AQI
31AQI
32AQI
29AQI
26AQI
26AQI
28AQI
29AQI
36AQI
34AQI
39AQI
38AQI
31AQI
24AQI
20AQI
19AQI
20AQI
23AQI
24AQI
27AQI
26AQI
29AQI
28AQI
22AQI
21AQI
24AQI
27AQI
19AQI
16AQI
17AQI
17AQI
18AQI
21AQI
23AQI
18AQI
20AQI
22AQI
22AQI
22AQI
21AQI
20AQI
22AQI
25AQI
23AQI
25AQI
34AQI
45AQI
49AQI
51AQI
57AQI
61AQI
59AQI
60AQI
62AQI
55AQI
50AQI
45AQI
43AQI
28AQI
29AQI
26AQI
24AQI
25AQI
30AQI
42AQI
36AQI
21AQI
17AQI
15AQI
15AQI
15AQI
16AQI
17AQI
17AQI
17AQI
20AQI
23AQI
24AQI
25AQI
19AQI
17AQI
17AQI
16AQI
14AQI
17AQI
17AQI
20AQI
47AQI
61AQI
44AQI
29AQI
26AQI
36AQI
24AQI
36AQI
18AQI
No. of days
202536AQI
Highest AQI recorded in
February61AQI
Lowest AQI recorded in
September18AQI
202425AQI
Highest AQI recorded in
December38AQI
Lowest AQI recorded in
October15AQI
202323AQI
Highest AQI recorded in
June36AQI
Lowest AQI recorded in
November17AQI
202223AQI
Highest AQI recorded in
July35AQI
Lowest AQI recorded in
November15AQI
202121AQI
Highest AQI recorded in
June29AQI
Lowest AQI recorded in
November14AQI
202022AQI
Highest AQI recorded in
April30AQI
Lowest AQI recorded in
October13AQI
Most & Least Polluted Years Over the Last 6 Years
Bassersdorf's annual 2025 AQI (36) shows an average percentage change of 60.9% (worsened AQI) compared to previous years: 2020 (22), 2021 (21), 2022 (23), 2023 (23), 2024 (25).