Chinatown, Boston, 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
Chinatown, Boston, Massachusetts, United States
AQI Trends: Highest and Lowest
Same Day Analysis (18th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 42 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 18th Oct - 19th Oct 2025
Chinatown, Boston, Massachusetts, United States
6 AM18th Oct 2025
6 PM
5 AM19th Oct 2025
41AQI
12AQI
56AQI
43AQI
In the last 24 hours,
Chinatown's AQI reached its highest point of 56 at 2 AM during the Night, while the lowest point, 12, was recorded at 4 PM during the Day between 18th Oct and 19th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Chinatown, Boston, Massachusetts, United States
21°C17/25°C
16°C12/20°C
14°C6/20°C
15°C8/23°C
21°C15/30°C
18°C17/19°C
20°C17/22°C
22°C18/29°C
20°C15/25°C
22°C17/29°C
21°C13/30°C
18°C14/24°C
14°C9/20°C
12°C6/17°C
14°C6/23°C
19°C10/31°C
20°C12/27°C
21°C14/28°C
21°C15/30°C
17°C10/21°C
9°C6/16°C
9°C1/17°C
13°C8/20°C
13°C10/15°C
13°C12/14°C
13°C11/15°C
12°C6/17°C
9°C5/14°C
11°C6/18°C
10°C4/19°C
--°C/°C
29AQI
26AQI
34AQI
26AQI
2025 Days Vs Air Quality
Chinatown, Boston, Massachusetts, United States
83%
172
17%
34
Total number of days with different AQI categories in last 292 days in 2025 (73 days remaining)
Under WHO’s Safe Air Quality Limits: 83%
Health Risk Level:
Low
In 2025, 83% of 292 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
Chinatown, Boston, Massachusetts, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
19AQI
22AQI
24AQI
25AQI
39AQI
20AQI
19AQI
29AQI
28AQI
25AQI
25AQI
19AQI
17AQI
16AQI
21AQI
24AQI
22AQI
19AQI
23AQI
36AQI
14AQI
16AQI
21AQI
49AQI
23AQI
18AQI
45AQI
28AQI
24AQI
56AQI
34AQI
14AQI
21AQI
28AQI
26AQI
19AQI
42AQI
49AQI
40AQI
29AQI
36AQI
31AQI
28AQI
37AQI
17AQI
24AQI
25AQI
32AQI
33AQI
44AQI
39AQI
38AQI
21AQI
13AQI
13AQI
19AQI
25AQI
14AQI
15AQI
15AQI
20AQI
27AQI
29AQI
23AQI
34AQI
20AQI
14AQI
19AQI
25AQI
41AQI
59AQI
61AQI
56AQI
88AQI
82AQI
54AQI
53AQI
71AQI
55AQI
48AQI
31AQI
37AQI
32AQI
25AQI
29AQI
36AQI
54AQI
54AQI
54AQI
57AQI
54AQI
39AQI
26AQI
31AQI
43AQI
40AQI
41AQI
35AQI
47AQI
43AQI
49AQI
59AQI
45AQI
37AQI
34AQI
30AQI
33AQI
33AQI
23AQI
26AQI
29AQI
38AQI
39AQI
21AQI
27AQI
20AQI
31AQI
19AQI
25AQI
30AQI
39AQI
76AQI
78AQI
70AQI
60AQI
54AQI
69AQI
59AQI
31AQI
55AQI
77AQI
81AQI
51AQI
63AQI
35AQI
34AQI
38AQI
53AQI
64AQI
51AQI
36AQI
43AQI
33AQI
51AQI
19AQI
18AQI
18AQI
20AQI
26AQI
38AQI
28AQI
31AQI
20AQI
20AQI
21AQI
24AQI
20AQI
20AQI
30AQI
28AQI
30AQI
27AQI
34AQI
46AQI
34AQI
23AQI
25AQI
25AQI
30AQI
32AQI
33AQI
39AQI
47AQI
33AQI
26AQI
22AQI
29AQI
19AQI
24AQI
23AQI
30AQI
31AQI
19AQI
24AQI
23AQI
30AQI
21AQI
20AQI
37AQI
20AQI
28AQI
46AQI
57AQI
60AQI
41AQI
18AQI
24AQI
19AQI
31AQI
34AQI
41AQI
29AQI
24AQI
16AQI
25AQI
42AQI
26AQI
25AQI
27AQI
46AQI
41AQI
38AQI
29AQI
33AQI
No. of days
202534AQI
Highest AQI recorded in
June46AQI
Lowest AQI recorded in
April25AQI
Most & Least Polluted Years Over the Last 1 Years
Chinatown's annual 2025 AQI (34) shows an average percentage change of NaN% (improved AQI) compared to previous years: .