South Burlington, Vermont, United States 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
South Burlington, Vermont, United States
AQI Trends: Highest and Lowest
Same Day Analysis (17th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 28 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: 17th Oct - 18th Oct 2025
South Burlington, Vermont, United States
6 AM17th Oct 2025
6 PM
5 AM18th Oct 2025
44AQI
8AQI
42AQI
8AQI
In the last 24 hours,
South Burlington's AQI reached its highest point of 44 at 7 AM during the Day, while the lowest point, 8, was recorded at 5 AM during the Night between 17th Oct and 18th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
South Burlington, Vermont, United States
20°C10/29°C
15°C11/19°C
11°C4/18°C
14°C3/26°C
19°C11/27°C
18°C17/20°C
18°C15/22°C
18°C16/22°C
19°C15/25°C
18°C12/24°C
20°C16/28°C
18°C10/29°C
16°C10/24°C
11°C5/18°C
11°C2/21°C
14°C6/25°C
18°C9/29°C
21°C12/31°C
22°C13/30°C
21°C16/30°C
13°C7/17°C
7°C3/14°C
7°C0/17°C
12°C5/21°C
12°C4/22°C
13°C10/18°C
12°C9/15°C
9°C6/14°C
7°C4/14°C
7°C1/16°C
--°C/°C
26AQI
21AQI
28AQI
21AQI
2025 Days Vs Air Quality
South Burlington, Vermont, United States
91%
265
9%
25
Total number of days with different AQI categories in last 291 days in 2025 (74 days remaining)
Under WHO’s Safe Air Quality Limits: 91%
Health Risk Level:
Very Low
In 2025, 91% of 291 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
South Burlington, Vermont, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
32AQI
27AQI
26AQI
25AQI
27AQI
28AQI
24AQI
26AQI
26AQI
27AQI
30AQI
31AQI
40AQI
27AQI
26AQI
33AQI
43AQI
34AQI
27AQI
27AQI
28AQI
33AQI
37AQI
37AQI
38AQI
34AQI
29AQI
28AQI
31AQI
28AQI
38AQI
28AQI
30AQI
36AQI
27AQI
28AQI
33AQI
30AQI
29AQI
30AQI
30AQI
31AQI
30AQI
28AQI
27AQI
28AQI
27AQI
27AQI
26AQI
27AQI
28AQI
27AQI
30AQI
42AQI
40AQI
45AQI
32AQI
32AQI
27AQI
27AQI
28AQI
30AQI
35AQI
35AQI
24AQI
26AQI
26AQI
27AQI
29AQI
31AQI
27AQI
29AQI
36AQI
37AQI
32AQI
27AQI
27AQI
29AQI
27AQI
23AQI
27AQI
26AQI
28AQI
29AQI
28AQI
27AQI
28AQI
30AQI
31AQI
31AQI
27AQI
28AQI
29AQI
27AQI
28AQI
27AQI
27AQI
27AQI
25AQI
30AQI
30AQI
29AQI
27AQI
29AQI
28AQI
22AQI
23AQI
29AQI
37AQI
27AQI
27AQI
29AQI
26AQI
29AQI
32AQI
30AQI
24AQI
27AQI
31AQI
25AQI
26AQI
29AQI
27AQI
28AQI
27AQI
27AQI
26AQI
27AQI
28AQI
25AQI
27AQI
27AQI
31AQI
31AQI
30AQI
35AQI
34AQI
25AQI
21AQI
22AQI
26AQI
25AQI
23AQI
23AQI
24AQI
26AQI
29AQI
31AQI
24AQI
26AQI
25AQI
16AQI
18AQI
25AQI
45AQI
58AQI
57AQI
63AQI
66AQI
63AQI
33AQI
50AQI
59AQI
34AQI
31AQI
33AQI
37AQI
30AQI
22AQI
32AQI
27AQI
40AQI
41AQI
45AQI
51AQI
39AQI
31AQI
28AQI
28AQI
27AQI
29AQI
34AQI
31AQI
41AQI
36AQI
33AQI
41AQI
45AQI
29AQI
36AQI
41AQI
36AQI
41AQI
32AQI
26AQI
44AQI
58AQI
38AQI
17AQI
25AQI
26AQI
29AQI
17AQI
21AQI
34AQI
40AQI
97AQI
74AQI
57AQI
52AQI
57AQI
60AQI
30AQI
30AQI
65AQI
87AQI
76AQI
52AQI
56AQI
55AQI
56AQI
56AQI
54AQI
55AQI
49AQI
39AQI
28AQI
36AQI
30AQI
16AQI
17AQI
17AQI
19AQI
26AQI
28AQI
28AQI
23AQI
15AQI
17AQI
20AQI
19AQI
16AQI
20AQI
27AQI
28AQI
26AQI
25AQI
28AQI
30AQI
25AQI
18AQI
18AQI
21AQI
27AQI
26AQI
30AQI
36AQI
31AQI
30AQI
27AQI
26AQI
19AQI
18AQI
19AQI
21AQI
29AQI
28AQI
16AQI
14AQI
20AQI
40AQI
37AQI
34AQI
17AQI
18AQI
18AQI
39AQI
54AQI
47AQI
35AQI
15AQI
16AQI
16AQI
18AQI
25AQI
14AQI
20AQI
16AQI
17AQI
28AQI
31AQI
31AQI
29AQI
28AQI
27AQI
39AQI
40AQI
37AQI
26AQI
24AQI
No. of days
202531AQI
Highest AQI recorded in
July40AQI
Lowest AQI recorded in
October24AQI
202429AQI
Highest AQI recorded in
February39AQI
Lowest AQI recorded in
May22AQI
202331AQI
Highest AQI recorded in
July46AQI
Lowest AQI recorded in
November23AQI
202229AQI
Highest AQI recorded in
January37AQI
Lowest AQI recorded in
September23AQI
202130AQI
Highest AQI recorded in
July38AQI
Lowest AQI recorded in
September22AQI
202026AQI
Highest AQI recorded in
July32AQI
Lowest AQI recorded in
October21AQI
Most & Least Polluted Years Over the Last 6 Years
South Burlington's annual 2025 AQI (31) shows an average percentage change of 8.4% (worsened AQI) compared to previous years: 2020 (26), 2021 (30), 2022 (29), 2023 (31), 2024 (29).