Mount Pleasant, South Carolina, 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
Mount Pleasant, South Carolina, United States
AQI Trends: Highest and Lowest
Same Day Analysis (17th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 44 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 17th Oct - 18th Oct 2025
Mount Pleasant, South Carolina, United States
7 AM17th Oct 2025
7 PM
6 AM18th Oct 2025
56AQI
18AQI
58AQI
15AQI
In the last 24 hours,
Mount Pleasant's AQI reached its highest point of 58 at 2 AM during the Night, while the lowest point, undefined, was recorded at 6 AM during the Night between 17th Oct and 18th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Mount Pleasant, South Carolina, United States
26°C22/32°C
25°C21/29°C
24°C21/31°C
24°C19/29°C
23°C20/28°C
24°C20/30°C
25°C21/30°C
27°C23/32°C
27°C24/31°C
24°C22/26°C
24°C22/27°C
23°C21/27°C
22°C20/24°C
21°C18/27°C
20°C15/25°C
21°C15/26°C
23°C20/28°C
24°C22/29°C
25°C22/29°C
24°C21/29°C
24°C19/29°C
20°C17/22°C
19°C15/23°C
17°C16/20°C
18°C17/19°C
17°C16/19°C
18°C13/23°C
18°C14/25°C
18°C13/24°C
16°C10/22°C
--°C/°C
34AQI
30AQI
36AQI
31AQI
2025 Days Vs Air Quality
Mount Pleasant, South Carolina, United States
90%
261
10%
29
Total number of days with different AQI categories in last 291 days in 2025 (74 days remaining)
Under WHO’s Safe Air Quality Limits: 90%
Health Risk Level:
Very Low
In 2025, 90% 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
Mount Pleasant, South Carolina, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
28AQI
31AQI
37AQI
25AQI
34AQI
26AQI
23AQI
33AQI
37AQI
38AQI
26AQI
32AQI
38AQI
35AQI
32AQI
44AQI
41AQI
32AQI
27AQI
23AQI
26AQI
26AQI
32AQI
37AQI
40AQI
39AQI
44AQI
29AQI
32AQI
40AQI
38AQI
33AQI
34AQI
32AQI
45AQI
53AQI
52AQI
47AQI
46AQI
38AQI
39AQI
40AQI
33AQI
31AQI
25AQI
34AQI
30AQI
32AQI
39AQI
29AQI
32AQI
28AQI
38AQI
55AQI
58AQI
66AQI
82AQI
72AQI
42AQI
55AQI
41AQI
40AQI
34AQI
48AQI
28AQI
34AQI
48AQI
33AQI
40AQI
43AQI
48AQI
51AQI
46AQI
42AQI
53AQI
34AQI
23AQI
39AQI
38AQI
29AQI
51AQI
52AQI
37AQI
34AQI
38AQI
32AQI
34AQI
34AQI
36AQI
27AQI
42AQI
41AQI
40AQI
43AQI
34AQI
35AQI
42AQI
28AQI
34AQI
25AQI
32AQI
26AQI
32AQI
39AQI
53AQI
36AQI
51AQI
34AQI
28AQI
27AQI
33AQI
34AQI
37AQI
41AQI
39AQI
38AQI
39AQI
31AQI
23AQI
27AQI
30AQI
34AQI
32AQI
28AQI
29AQI
38AQI
48AQI
45AQI
31AQI
33AQI
27AQI
34AQI
28AQI
32AQI
40AQI
51AQI
47AQI
42AQI
38AQI
45AQI
46AQI
27AQI
42AQI
31AQI
34AQI
36AQI
29AQI
28AQI
35AQI
29AQI
35AQI
55AQI
62AQI
59AQI
53AQI
43AQI
37AQI
48AQI
47AQI
43AQI
38AQI
38AQI
29AQI
40AQI
39AQI
30AQI
28AQI
30AQI
32AQI
31AQI
35AQI
35AQI
36AQI
28AQI
36AQI
47AQI
44AQI
27AQI
25AQI
34AQI
36AQI
39AQI
45AQI
39AQI
41AQI
34AQI
28AQI
32AQI
34AQI
32AQI
30AQI
32AQI
33AQI
35AQI
33AQI
31AQI
40AQI
34AQI
31AQI
35AQI
37AQI
37AQI
44AQI
40AQI
28AQI
31AQI
54AQI
35AQI
36AQI
36AQI
37AQI
41AQI
41AQI
28AQI
38AQI
39AQI
36AQI
35AQI
30AQI
54AQI
48AQI
28AQI
25AQI
25AQI
22AQI
25AQI
31AQI
37AQI
43AQI
51AQI
53AQI
52AQI
45AQI
38AQI
27AQI
29AQI
33AQI
44AQI
44AQI
38AQI
47AQI
45AQI
39AQI
28AQI
32AQI
34AQI
29AQI
30AQI
26AQI
29AQI
44AQI
38AQI
37AQI
36AQI
33AQI
39AQI
42AQI
52AQI
51AQI
52AQI
48AQI
43AQI
51AQI
41AQI
42AQI
37AQI
25AQI
25AQI
31AQI
20AQI
34AQI
35AQI
37AQI
57AQI
43AQI
34AQI
36AQI
18AQI
13AQI
15AQI
35AQI
23AQI
28AQI
15AQI
23AQI
21AQI
37AQI
18AQI
40AQI
44AQI
33AQI
42AQI
39AQI
35AQI
36AQI
39AQI
36AQI
38AQI
37AQI
29AQI
No. of days
202537AQI
Highest AQI recorded in
February42AQI
Lowest AQI recorded in
October29AQI
202433AQI
Highest AQI recorded in
April39AQI
Lowest AQI recorded in
September29AQI
202335AQI
Highest AQI recorded in
June46AQI
Lowest AQI recorded in
December26AQI
202233AQI
Highest AQI recorded in
June40AQI
Lowest AQI recorded in
August26AQI
202130AQI
Highest AQI recorded in
April37AQI
Lowest AQI recorded in
February25AQI
202029AQI
Highest AQI recorded in
March38AQI
Lowest AQI recorded in
October25AQI
Most & Least Polluted Years Over the Last 6 Years
Mount Pleasant's annual 2025 AQI (37) shows an average percentage change of 14.5% (worsened AQI) compared to previous years: 2020 (29), 2021 (30), 2022 (33), 2023 (35), 2024 (33).