Real-time air quality index in Halfway, Maryland today
Stay updated with real-time air quality in Halfway, Maryland featuring accurate data on AQI, PM2.5, PM10, O3, NO2, SO2, and CO levels. Use our interactive map and detailed forecasts to monitor pollution trends, manage health risks, and plan your daily activities with confidence.
Live AQI (Air Quality Index)
22
Good
Halfway, Maryland
Last updated: ... (Local time)
Common air pollutants in Halfway, Maryland
Good
Fine
Moderate
Poor
Very poor
Hazardous
Particulate Matter2.5 (PM2.5)
3.81 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
15.26 μg/m³
0
55
155
255
425
605+
Ozone (O3)
20.19 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.22 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
14.91 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.33 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Halfway, Maryland
Halfway, Maryland
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Halfway, Maryland air quality map: Real-time AQI near you
Air quality in nearby cities
Hagerstown, Maryland
AQI 22
Good
3.85μg/m³
PM2.5
15.30μg/m³
PM10
20.09ppb
O3
0.22ppb
SO2
14.84ppb
NO2
0.33ppm
CO
Waynesboro, Pennsylvania
AQI 56
Moderate
11.98μg/m³
PM2.5
18.41μg/m³
PM10
21.63ppb
O3
0.22ppb
SO2
13.96ppb
NO2
0.33ppm
CO
Martinsburg, West Virginia
AQI 56
Moderate
12.11μg/m³
PM2.5
16.88μg/m³
PM10
13.00ppb
O3
0.22ppb
SO2
11.17ppb
NO2
0.32ppm
CO
Guilford, Pennsylvania
AQI 22
Good
4.02μg/m³
PM2.5
19.18μg/m³
PM10
23.31ppb
O3
0.22ppb
SO2
12.01ppb
NO2
0.33ppm
CO
Chambersburg, Pennsylvania
AQI 22
Good
3.99μg/m³
PM2.5
20.49μg/m³
PM10
22.89ppb
O3
0.22ppb
SO2
11.96ppb
NO2
0.33ppm
CO
Frederick, Maryland
AQI 27
Good
4.71μg/m³
PM2.5
17.99μg/m³
PM10
8.26ppb
O3
0.21ppb
SO2
15.25ppb
NO2
0.33ppm
CO
How accurate is Maryland, USA air quality data?
Air quality measurements for Maryland, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Frequently asked questions
How frequently is the air quality data for Halfway, Maryland updated?
Air quality data for Halfway, Maryland is updated on an hourly basis.
When did Halfway, Maryland experience the worst air quality in the last 24 hours?
The worst air quality in Halfway, Maryland was recorded at 03:00:00 on 2025-10-21.
When did Halfway, Maryland have its best air quality in the last 24 hours?
The best air quality in Halfway, Maryland was recorded at 04:00:00 on 2025-10-21.
What is the real-time air quality index for Halfway, Maryland?
The real-time air quality index in Halfway, Maryland is 22, currently categorized as Good.
Which pollutant is found most often in Halfway, Maryland?
The most common pollutant in Halfway, Maryland is PM2.5.
What can I do if the air quality in Halfway, Maryland is poor?
If the air quality in Halfway, Maryland is poor, limit outdoor activities and use a mask to safeguard your health.
What are the current PM2.5 levels in Halfway, Maryland?
The measured PM2.5 levels in Halfway, Maryland at present are 3.813 μg/m3.
What are the current PM10 levels at Halfway, Maryland?
The current PM10 levels in Halfway, Maryland are 15.262 μg/m3.
What are the current carbon monoxide (CO) levels at Halfway, Maryland?
The current carbon monoxide (CO) level in Halfway, Maryland is 0.334 ppm.
What are the current sulfur dioxide (SO2) levels at Halfway, Maryland?
The current sulfur dioxide (SO2) levels in Halfway, Maryland are 0.22 ppb.
What are the current ozone (O3) levels at Halfway, Maryland?
The current ozone (O3) levels at Halfway, Maryland is 20.194 ppm.
What are the current nitrogen dioxide (NO2) levels at Halfway, Maryland?
The current nitrogen dioxide (NO2) levels at Halfway, Maryland is 14.911 ppb.
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