Hillen, Baltimore, Maryland, 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
Hillen, Baltimore, Maryland, United States
AQI Trends: Highest and Lowest
Same Day Analysis (19th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 58 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 18th Oct - 19th Oct 2025
Hillen, Baltimore, Maryland, United States
7 AM18th Oct 2025
6 PM
6 AM19th Oct 2025
57AQI
48AQI
64AQI
28AQI
In the last 24 hours,
Hillen's AQI reached its highest point of 64 at 11 PM during the Night, while the lowest point, 28, was recorded at 9 PM during the Night between 18th Oct and 19th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Hillen, Baltimore, Maryland, United States
24°C16/33°C
20°C16/24°C
21°C18/25°C
21°C16/26°C
24°C17/34°C
23°C19/31°C
24°C22/29°C
24°C20/31°C
23°C19/28°C
24°C18/31°C
23°C18/30°C
23°C20/30°C
18°C13/24°C
17°C11/23°C
17°C10/25°C
19°C10/29°C
20°C12/30°C
21°C14/31°C
22°C15/31°C
20°C14/24°C
15°C10/21°C
13°C6/19°C
16°C10/21°C
18°C15/20°C
14°C13/16°C
16°C12/22°C
17°C11/24°C
13°C8/20°C
13°C6/22°C
15°C8/25°C
--°C/°C
39AQI
35AQI
43AQI
35AQI
2025 Days Vs Air Quality
Hillen, Baltimore, Maryland, United States
85%
175
15%
32
Total number of days with different AQI categories in last 292 days in 2025 (73 days remaining)
Under WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2025, 85% 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
Hillen, Baltimore, Maryland, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
29AQI
44AQI
60AQI
54AQI
35AQI
26AQI
27AQI
38AQI
36AQI
36AQI
39AQI
24AQI
26AQI
28AQI
26AQI
24AQI
22AQI
22AQI
41AQI
35AQI
17AQI
21AQI
42AQI
58AQI
38AQI
33AQI
39AQI
34AQI
55AQI
41AQI
39AQI
16AQI
22AQI
39AQI
37AQI
38AQI
50AQI
46AQI
26AQI
30AQI
26AQI
23AQI
36AQI
26AQI
26AQI
39AQI
42AQI
28AQI
28AQI
33AQI
49AQI
29AQI
22AQI
25AQI
21AQI
18AQI
14AQI
13AQI
16AQI
18AQI
19AQI
32AQI
16AQI
21AQI
35AQI
34AQI
23AQI
28AQI
35AQI
51AQI
56AQI
51AQI
34AQI
40AQI
35AQI
44AQI
57AQI
65AQI
68AQI
60AQI
41AQI
29AQI
24AQI
29AQI
24AQI
23AQI
35AQI
41AQI
53AQI
57AQI
55AQI
43AQI
31AQI
27AQI
36AQI
41AQI
44AQI
31AQI
43AQI
54AQI
87AQI
50AQI
27AQI
38AQI
32AQI
29AQI
36AQI
33AQI
26AQI
27AQI
23AQI
27AQI
28AQI
26AQI
29AQI
25AQI
25AQI
37AQI
37AQI
34AQI
51AQI
40AQI
49AQI
34AQI
52AQI
56AQI
47AQI
29AQI
41AQI
47AQI
57AQI
69AQI
71AQI
66AQI
52AQI
38AQI
45AQI
49AQI
38AQI
33AQI
29AQI
46AQI
45AQI
46AQI
32AQI
24AQI
21AQI
18AQI
27AQI
34AQI
31AQI
26AQI
22AQI
25AQI
33AQI
35AQI
25AQI
36AQI
34AQI
27AQI
34AQI
34AQI
42AQI
56AQI
38AQI
27AQI
29AQI
22AQI
25AQI
35AQI
48AQI
48AQI
48AQI
41AQI
26AQI
26AQI
44AQI
33AQI
31AQI
28AQI
40AQI
51AQI
34AQI
26AQI
24AQI
35AQI
53AQI
52AQI
38AQI
29AQI
34AQI
50AQI
57AQI
56AQI
30AQI
31AQI
41AQI
41AQI
39AQI
22AQI
27AQI
26AQI
41AQI
34AQI
40AQI
54AQI
58AQI
44AQI
33AQI
28AQI
41AQI
38AQI
38AQI
36AQI
39AQI
No. of days
202536AQI
Highest AQI recorded in
March44AQI
Lowest AQI recorded in
May28AQI
Most & Least Polluted Years Over the Last 1 Years
Hillen's annual 2025 AQI (36) shows an average percentage change of NaN% (improved AQI) compared to previous years: .