Halfway, 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
Halfway, Maryland, United States
AQI Trends: Highest and Lowest
Same Day Analysis (4th October ):
On this day, AQI across the 5 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: 4th Oct - 5th Oct 2025
Halfway, Maryland, United States
6 AM4th Oct 2025
7 PM
5 AM5th Oct 2025
48AQI
25AQI
56AQI
42AQI
In the last 24 hours,
Halfway's AQI reached its highest point of 56 at 5 AM during the Night, while the lowest point, 25, was recorded at 10 AM during the Day between 4th Oct and 5th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Halfway, Maryland, United States
21°C12/31°C
23°C18/29°C
17°C12/23°C
15°C5/25°C
16°C5/25°C
16°C11/20°C
19°C12/27°C
20°C9/29°C
20°C11/30°C
22°C14/30°C
20°C12/27°C
19°C13/25°C
17°C15/19°C
20°C15/29°C
21°C11/31°C
17°C15/19°C
20°C15/24°C
21°C17/26°C
23°C18/30°C
21°C17/29°C
22°C20/28°C
22°C16/29°C
20°C17/27°C
22°C15/31°C
22°C16/30°C
22°C17/30°C
19°C14/26°C
15°C7/23°C
17°C9/26°C
18°C9/29°C
--°C/°C
33AQI
31AQI
37AQI
32AQI
2025 Days Vs Air Quality
Halfway, Maryland, United States
91%
252
9%
25
Total number of days with different AQI categories in last 278 days in 2025 (87 days remaining)
Under WHO’s Safe Air Quality Limits: 91%
Health Risk Level:
Very Low
In 2025, 91% of 278 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
Halfway, Maryland, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
20AQI
19AQI
26AQI
20AQI
28AQI
35AQI
19AQI
20AQI
20AQI
35AQI
49AQI
47AQI
35AQI
23AQI
28AQI
41AQI
34AQI
44AQI
41AQI
23AQI
37AQI
44AQI
55AQI
46AQI
51AQI
30AQI
28AQI
23AQI
25AQI
26AQI
33AQI
22AQI
22AQI
42AQI
31AQI
24AQI
27AQI
25AQI
30AQI
26AQI
32AQI
40AQI
53AQI
22AQI
23AQI
23AQI
21AQI
21AQI
23AQI
27AQI
28AQI
26AQI
40AQI
37AQI
43AQI
33AQI
39AQI
40AQI
26AQI
28AQI
28AQI
33AQI
37AQI
28AQI
24AQI
30AQI
30AQI
29AQI
32AQI
37AQI
32AQI
40AQI
56AQI
47AQI
29AQI
20AQI
21AQI
30AQI
28AQI
17AQI
21AQI
21AQI
23AQI
20AQI
25AQI
28AQI
35AQI
54AQI
43AQI
28AQI
24AQI
27AQI
24AQI
27AQI
40AQI
32AQI
21AQI
24AQI
27AQI
28AQI
32AQI
26AQI
24AQI
36AQI
27AQI
19AQI
24AQI
35AQI
58AQI
29AQI
32AQI
32AQI
29AQI
47AQI
42AQI
28AQI
17AQI
20AQI
36AQI
28AQI
34AQI
31AQI
29AQI
20AQI
23AQI
18AQI
17AQI
25AQI
19AQI
21AQI
37AQI
39AQI
18AQI
18AQI
25AQI
43AQI
29AQI
19AQI
23AQI
26AQI
19AQI
12AQI
16AQI
19AQI
18AQI
24AQI
31AQI
18AQI
26AQI
27AQI
30AQI
22AQI
27AQI
30AQI
51AQI
63AQI
58AQI
30AQI
54AQI
45AQI
41AQI
49AQI
57AQI
69AQI
67AQI
43AQI
19AQI
18AQI
17AQI
20AQI
27AQI
47AQI
50AQI
51AQI
56AQI
55AQI
39AQI
39AQI
23AQI
28AQI
32AQI
30AQI
31AQI
41AQI
55AQI
67AQI
56AQI
34AQI
36AQI
34AQI
38AQI
42AQI
43AQI
29AQI
23AQI
25AQI
26AQI
21AQI
26AQI
29AQI
29AQI
28AQI
53AQI
54AQI
48AQI
49AQI
37AQI
37AQI
26AQI
42AQI
44AQI
44AQI
38AQI
31AQI
38AQI
49AQI
65AQI
69AQI
72AQI
70AQI
37AQI
34AQI
36AQI
32AQI
25AQI
30AQI
47AQI
49AQI
48AQI
32AQI
26AQI
17AQI
18AQI
22AQI
30AQI
32AQI
26AQI
20AQI
22AQI
26AQI
27AQI
21AQI
27AQI
27AQI
27AQI
29AQI
30AQI
37AQI
47AQI
33AQI
23AQI
24AQI
24AQI
28AQI
33AQI
36AQI
37AQI
44AQI
41AQI
32AQI
30AQI
41AQI
33AQI
31AQI
26AQI
38AQI
32AQI
31AQI
25AQI
36AQI
27AQI
32AQI
31AQI
34AQI
34AQI
36AQI
42AQI
32AQI
30AQI
31AQI
30AQI
24AQI
41AQI
38AQI
36AQI
32AQI
37AQI
No. of days
202533AQI
Highest AQI recorded in
June41AQI
Lowest AQI recorded in
May24AQI
202430AQI
Highest AQI recorded in
June33AQI
Lowest AQI recorded in
November23AQI
202333AQI
Highest AQI recorded in
June56AQI
Lowest AQI recorded in
October25AQI
202231AQI
Highest AQI recorded in
June38AQI
Lowest AQI recorded in
November24AQI
202136AQI
Highest AQI recorded in
February47AQI
Lowest AQI recorded in
October30AQI
202032AQI
Highest AQI recorded in
December38AQI
Lowest AQI recorded in
October25AQI
Most & Least Polluted Years Over the Last 6 Years
Halfway's annual 2025 AQI (33) shows an average percentage change of 1.3% (worsened AQI) compared to previous years: 2020 (32), 2021 (36), 2022 (31), 2023 (33), 2024 (30).