Central Business District, Worcester, Massachusetts, 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
Central Business District, Worcester, Massachusetts, United States
AQI Trends: Highest and Lowest
Same Day Analysis (15th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 11 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 15th Oct - 16th Oct 2025
Central Business District, Worcester, Massachusetts, United States
6 AM15th Oct 2025
6 PM
5 AM16th Oct 2025
27AQI
6AQI
26AQI
6AQI
In the last 24 hours,
Central Business District's AQI reached its highest point of 27 at 3 PM during the Day, while the lowest point, 6, was recorded at 11 PM during the Night between 15th Oct and 16th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Central Business District, Worcester, Massachusetts, United States
17°C9/23°C
15°C9/20°C
21°C15/28°C
20°C15/25°C
15°C8/21°C
14°C6/23°C
15°C7/23°C
19°C14/27°C
18°C16/19°C
19°C16/22°C
21°C18/26°C
19°C14/27°C
21°C17/30°C
20°C12/28°C
19°C13/27°C
13°C8/21°C
12°C5/20°C
13°C6/22°C
19°C9/30°C
21°C12/31°C
20°C13/30°C
20°C15/29°C
17°C9/20°C
9°C5/15°C
8°C1/16°C
12°C7/19°C
11°C9/14°C
11°C10/12°C
11°C9/14°C
12°C6/18°C
--°C/°C
25AQI
22AQI
26AQI
22AQI
2025 Days Vs Air Quality
Central Business District, Worcester, Massachusetts, United States
83%
169
16%
33
0.4%
1
Total number of days with different AQI categories in last 289 days in 2025 (76 days remaining)
Under WHO’s Safe Air Quality Limits: 83%
Health Risk Level:
Low
In 2025, 83% of 289 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
Central Business District, Worcester, Massachusetts, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
17AQI
20AQI
22AQI
34AQI
39AQI
18AQI
18AQI
26AQI
23AQI
18AQI
18AQI
17AQI
16AQI
15AQI
25AQI
25AQI
16AQI
13AQI
18AQI
25AQI
10AQI
15AQI
19AQI
49AQI
18AQI
16AQI
26AQI
17AQI
23AQI
47AQI
26AQI
10AQI
17AQI
27AQI
19AQI
17AQI
35AQI
56AQI
53AQI
33AQI
19AQI
24AQI
19AQI
23AQI
13AQI
19AQI
21AQI
28AQI
30AQI
28AQI
37AQI
36AQI
18AQI
12AQI
12AQI
17AQI
16AQI
12AQI
13AQI
12AQI
19AQI
24AQI
26AQI
19AQI
31AQI
19AQI
13AQI
17AQI
24AQI
42AQI
60AQI
62AQI
52AQI
81AQI
78AQI
33AQI
53AQI
72AQI
59AQI
50AQI
37AQI
37AQI
30AQI
18AQI
26AQI
32AQI
51AQI
51AQI
52AQI
58AQI
58AQI
56AQI
45AQI
27AQI
37AQI
30AQI
37AQI
32AQI
44AQI
41AQI
39AQI
55AQI
43AQI
31AQI
26AQI
27AQI
31AQI
32AQI
23AQI
22AQI
29AQI
33AQI
34AQI
18AQI
22AQI
20AQI
31AQI
18AQI
22AQI
30AQI
38AQI
74AQI
83AQI
61AQI
56AQI
43AQI
64AQI
52AQI
30AQI
60AQI
81AQI
101AQI
55AQI
51AQI
37AQI
38AQI
42AQI
54AQI
59AQI
46AQI
34AQI
53AQI
47AQI
55AQI
18AQI
18AQI
18AQI
17AQI
23AQI
33AQI
26AQI
26AQI
16AQI
19AQI
20AQI
23AQI
17AQI
19AQI
28AQI
28AQI
27AQI
24AQI
32AQI
46AQI
35AQI
20AQI
21AQI
21AQI
25AQI
31AQI
35AQI
40AQI
44AQI
33AQI
23AQI
21AQI
28AQI
17AQI
23AQI
21AQI
28AQI
32AQI
19AQI
22AQI
16AQI
25AQI
26AQI
23AQI
17AQI
16AQI
25AQI
35AQI
54AQI
54AQI
34AQI
10AQI
12AQI
12AQI
19AQI
25AQI
18AQI
24AQI
11AQI
26AQI
21AQI
24AQI
45AQI
37AQI
38AQI
27AQI
24AQI
No. of days
202531AQI
Highest AQI recorded in
June45AQI
Lowest AQI recorded in
April21AQI
Most & Least Polluted Years Over the Last 1 Years
Central Business District's annual 2025 AQI (31) shows an average percentage change of NaN% (improved AQI) compared to previous years: .