Saint Brieuc, Bretagne, France Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Saint Brieuc, Bretagne, France
AQI Trends: Highest and Lowest
Same Day Analysis (2nd October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 52 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Oct - 4th Oct 2025
Saint Brieuc, Bretagne, France
7 AM3rd Oct 2025
8 PM
6 AM4th Oct 2025
AQI
AQI
47AQI
27AQI
In the last 24 hours,
Saint Brieuc's AQI reached its highest point of 47 at 10 AM during the Night, while the lowest point, undefined, was recorded at 6 AM during the Night between 3rd Oct and 4th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Saint Brieuc, Bretagne, France
16°C12/20°C
15°C11/21°C
18°C11/27°C
18°C14/23°C
15°C11/21°C
15°C10/20°C
15°C12/18°C
15°C12/19°C
14°C10/19°C
15°C12/19°C
16°C12/21°C
15°C12/19°C
15°C11/18°C
17°C13/23°C
19°C14/24°C
19°C14/28°C
16°C10/22°C
13°C10/17°C
13°C11/14°C
12°C10/15°C
13°C11/16°C
12°C10/16°C
12°C10/16°C
13°C9/17°C
13°C11/16°C
14°C11/17°C
13°C10/18°C
14°C11/20°C
15°C11/21°C
--°C/°C
--°C/°C
26AQI
22AQI
26AQI
23AQI
2025 Days Vs Air Quality
Saint Brieuc, Bretagne, France
89%
245
11%
30
Total number of days with different AQI categories in last 276 days in 2025 (89 days remaining)
Under WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2025, 89% of 276 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
Saint Brieuc, Bretagne, France
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
29AQI
27AQI
33AQI
36AQI
30AQI
29AQI
28AQI
31AQI
27AQI
25AQI
33AQI
45AQI
46AQI
71AQI
68AQI
42AQI
55AQI
55AQI
47AQI
48AQI
47AQI
50AQI
29AQI
30AQI
28AQI
29AQI
30AQI
32AQI
30AQI
30AQI
31AQI
29AQI
33AQI
37AQI
32AQI
32AQI
39AQI
47AQI
33AQI
40AQI
34AQI
58AQI
62AQI
55AQI
54AQI
61AQI
70AQI
79AQI
76AQI
67AQI
30AQI
40AQI
31AQI
28AQI
31AQI
30AQI
28AQI
28AQI
31AQI
35AQI
47AQI
58AQI
72AQI
70AQI
46AQI
38AQI
30AQI
28AQI
27AQI
49AQI
31AQI
25AQI
28AQI
25AQI
45AQI
58AQI
51AQI
34AQI
29AQI
32AQI
21AQI
28AQI
46AQI
63AQI
38AQI
41AQI
30AQI
25AQI
25AQI
32AQI
37AQI
35AQI
25AQI
30AQI
38AQI
48AQI
32AQI
42AQI
55AQI
56AQI
54AQI
42AQI
30AQI
19AQI
20AQI
16AQI
17AQI
16AQI
16AQI
42AQI
32AQI
21AQI
17AQI
25AQI
44AQI
52AQI
56AQI
55AQI
35AQI
32AQI
33AQI
27AQI
33AQI
30AQI
18AQI
22AQI
23AQI
29AQI
36AQI
28AQI
18AQI
20AQI
19AQI
26AQI
34AQI
31AQI
35AQI
35AQI
39AQI
41AQI
34AQI
29AQI
31AQI
23AQI
16AQI
21AQI
20AQI
20AQI
16AQI
19AQI
22AQI
25AQI
20AQI
23AQI
18AQI
17AQI
16AQI
15AQI
22AQI
48AQI
47AQI
38AQI
39AQI
35AQI
26AQI
24AQI
25AQI
29AQI
29AQI
34AQI
44AQI
49AQI
53AQI
28AQI
27AQI
22AQI
18AQI
15AQI
14AQI
18AQI
22AQI
28AQI
21AQI
19AQI
20AQI
21AQI
17AQI
17AQI
19AQI
20AQI
23AQI
23AQI
23AQI
26AQI
25AQI
23AQI
32AQI
23AQI
21AQI
21AQI
21AQI
18AQI
16AQI
16AQI
44AQI
55AQI
37AQI
25AQI
25AQI
18AQI
18AQI
19AQI
22AQI
21AQI
21AQI
22AQI
24AQI
25AQI
24AQI
27AQI
21AQI
25AQI
41AQI
52AQI
54AQI
46AQI
36AQI
42AQI
47AQI
36AQI
38AQI
41AQI
38AQI
30AQI
29AQI
30AQI
27AQI
26AQI
27AQI
22AQI
21AQI
19AQI
19AQI
20AQI
20AQI
24AQI
22AQI
18AQI
17AQI
21AQI
20AQI
20AQI
19AQI
20AQI
18AQI
17AQI
16AQI
19AQI
19AQI
18AQI
16AQI
21AQI
23AQI
17AQI
16AQI
16AQI
17AQI
25AQI
26AQI
38AQI
28AQI
32AQI
47AQI
47AQI
52AQI
38AQI
43AQI
39AQI
35AQI
27AQI
28AQI
24AQI
31AQI
22AQI
50AQI
No. of days
202532AQI
Highest AQI recorded in
October50AQI
Lowest AQI recorded in
September22AQI
202430AQI
Highest AQI recorded in
January36AQI
Lowest AQI recorded in
July23AQI
202333AQI
Highest AQI recorded in
February42AQI
Lowest AQI recorded in
August20AQI
202236AQI
Highest AQI recorded in
March53AQI
Lowest AQI recorded in
October27AQI
202133AQI
Highest AQI recorded in
April50AQI
Lowest AQI recorded in
January25AQI
202035AQI
Highest AQI recorded in
March49AQI
Lowest AQI recorded in
July24AQI
Most & Least Polluted Years Over the Last 6 Years
Saint Brieuc's annual 2025 AQI (32) shows an average percentage change of -4.7% (improved AQI) compared to previous years: 2020 (35), 2021 (33), 2022 (36), 2023 (33), 2024 (30).