Brest, Bretagne, France Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
July Air Quality Analysis
Brest, Bretagne, France
AQI Trends: Highest and Lowest
Same Day Analysis (29th July ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 19 of Good air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 29th Jul - 30th Jul 2025
Brest, Bretagne, France
6 AM29th Jul 2025
10 PM
5 AM30th Jul 2025
35AQI
21AQI
28AQI
18AQI
In the last 24 hours,
Brest's AQI reached its highest point of 35 at 3 PM during the Day, while the lowest point, 18, was recorded at 4 AM during the Night between 29th Jul and 30th Jul 2025.
Day & Night AQI Trend : Jun - Jul 2025
Brest, Bretagne, France
21°C16/26°C
19°C16/22°C
17°C13/19°C
16°C13/20°C
17°C13/21°C
16°C14/18°C
17°C15/18°C
16°C14/18°C
16°C14/19°C
17°C14/21°C
19°C13/25°C
22°C16/27°C
23°C18/28°C
20°C17/23°C
17°C15/20°C
17°C15/20°C
18°C16/21°C
18°C15/22°C
17°C15/21°C
17°C15/20°C
16°C15/18°C
17°C16/18°C
17°C15/19°C
17°C14/19°C
17°C14/20°C
17°C14/20°C
17°C15/19°C
16°C14/18°C
17°C14/20°C
17°C15/19°C
--°C/°C
26AQI
26AQI
26AQI
26AQI
2025 Days Vs Air Quality
Brest, Bretagne, France
82%
173
18%
37
Total number of days with different AQI categories in last 211 days in 2025 (154 days remaining)
Under WHO’s Safe Air Quality Limits: 82%
Health Risk Level:
Low
In 2025, 82% of 211 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
Brest, Bretagne, France
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
36AQI
29AQI
33AQI
39AQI
36AQI
32AQI
32AQI
38AQI
31AQI
29AQI
33AQI
36AQI
41AQI
68AQI
72AQI
46AQI
62AQI
66AQI
61AQI
60AQI
60AQI
62AQI
35AQI
36AQI
34AQI
36AQI
32AQI
38AQI
32AQI
31AQI
34AQI
37AQI
30AQI
42AQI
31AQI
41AQI
39AQI
51AQI
41AQI
53AQI
40AQI
73AQI
73AQI
63AQI
38AQI
49AQI
68AQI
77AQI
69AQI
62AQI
36AQI
42AQI
37AQI
33AQI
40AQI
32AQI
29AQI
28AQI
35AQI
33AQI
44AQI
65AQI
79AQI
75AQI
52AQI
46AQI
31AQI
30AQI
32AQI
65AQI
37AQI
28AQI
35AQI
27AQI
40AQI
60AQI
59AQI
39AQI
28AQI
31AQI
23AQI
39AQI
65AQI
62AQI
33AQI
53AQI
24AQI
24AQI
24AQI
42AQI
36AQI
41AQI
34AQI
31AQI
37AQI
48AQI
43AQI
46AQI
64AQI
68AQI
61AQI
50AQI
32AQI
19AQI
22AQI
16AQI
17AQI
18AQI
18AQI
50AQI
49AQI
23AQI
18AQI
19AQI
36AQI
50AQI
56AQI
58AQI
37AQI
34AQI
35AQI
23AQI
37AQI
29AQI
18AQI
19AQI
22AQI
26AQI
32AQI
35AQI
20AQI
23AQI
22AQI
25AQI
33AQI
34AQI
29AQI
31AQI
38AQI
45AQI
40AQI
28AQI
27AQI
21AQI
18AQI
22AQI
25AQI
21AQI
18AQI
19AQI
22AQI
23AQI
20AQI
22AQI
18AQI
18AQI
15AQI
16AQI
25AQI
57AQI
44AQI
42AQI
48AQI
41AQI
28AQI
24AQI
22AQI
30AQI
32AQI
32AQI
45AQI
51AQI
52AQI
28AQI
24AQI
23AQI
18AQI
16AQI
14AQI
18AQI
22AQI
28AQI
20AQI
17AQI
18AQI
22AQI
17AQI
18AQI
19AQI
20AQI
20AQI
21AQI
22AQI
26AQI
24AQI
24AQI
32AQI
22AQI
23AQI
19AQI
20AQI
19AQI
16AQI
16AQI
52AQI
60AQI
30AQI
24AQI
22AQI
19AQI
42AQI
46AQI
43AQI
38AQI
27AQI
29AQI
24AQI
No. of days
202535AQI
Highest AQI recorded in
February46AQI
Lowest AQI recorded in
July24AQI
202428AQI
Highest AQI recorded in
November40AQI
Lowest AQI recorded in
July18AQI
202327AQI
Highest AQI recorded in
January39AQI
Lowest AQI recorded in
August17AQI
202236AQI
Highest AQI recorded in
March49AQI
Lowest AQI recorded in
November25AQI
202132AQI
Highest AQI recorded in
March42AQI
Lowest AQI recorded in
August23AQI
202030AQI
Highest AQI recorded in
March62AQI
Lowest AQI recorded in
July19AQI
Most & Least Polluted Years Over the Last 6 Years
Brest's annual 2025 AQI (35) shows an average percentage change of 17.3% (worsened AQI) compared to previous years: 2020 (30), 2021 (32), 2022 (36), 2023 (27), 2024 (28).