Live 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)
66
Moderate
Halfway, Maryland
Last updated: ... (Local time)
Major air pollutants in Halfway, Maryland
Good
Fine
Moderate
Poor
Very poor
Hazardous
Particulate Matter2.5 (PM2.5)
17.30 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
Particulate Matter10 (PM10)
74.81 μg/m³
0
55
155
255
425
605+
Ozone (O3)
28.39 ppb
0
55
71
86
201
201+
Sulfur Dioxide (SO2)
0.28 ppb
0
36
76
186
605
1005+
Nitrogen Dioxide (NO2)
10.70 ppb
0
54
101
361
1250
2050+
Carbon Monoxide (CO)
0.26 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 66
Moderate
17.42μg/m³
PM2.5
75.66μg/m³
PM10
31.99ppb
O3
0.26ppb
SO2
12.76ppb
NO2
0.28ppm
CO
Waynesboro, Pennsylvania
AQI 71
Moderate
20.12μg/m³
PM2.5
70.32μg/m³
PM10
31.09ppb
O3
0.25ppb
SO2
13.02ppb
NO2
0.28ppm
CO
Martinsburg, West Virginia
AQI 58
Moderate
13.17μg/m³
PM2.5
42.15μg/m³
PM10
10.03ppb
O3
0.30ppb
SO2
9.87ppb
NO2
0.28ppm
CO
Guilford, Pennsylvania
AQI 71
Moderate
20.00μg/m³
PM2.5
65.64μg/m³
PM10
34.24ppb
O3
0.26ppb
SO2
13.05ppb
NO2
0.28ppm
CO
Chambersburg, Pennsylvania
AQI 71
Moderate
19.99μg/m³
PM2.5
65.81μg/m³
PM10
26.71ppb
O3
0.27ppb
SO2
13.04ppb
NO2
0.28ppm
CO
Frederick, Maryland
AQI 54
Moderate
11.02μg/m³
PM2.5
36.67μg/m³
PM10
19.26ppb
O3
0.23ppb
SO2
11.20ppb
NO2
0.28ppm
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 2025-06-06.
When did Halfway, Maryland have its best air quality in the last 24 hours?
The best air quality in Halfway, Maryland was recorded at 10:00:00 on 2025-06-05.
What is the real-time air quality index for Halfway, Maryland?
The real-time air quality index in Halfway, Maryland is 66, currently categorized as Moderate.
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 17.302 μg/m3.
What are the current PM10 levels at Halfway, Maryland?
The current PM10 levels in Halfway, Maryland are 74.809 μg/m3.
What are the current carbon monoxide (CO) levels at Halfway, Maryland?
The current carbon monoxide (CO) level in Halfway, Maryland is 0.26 ppm.
What are the current sulfur dioxide (SO2) levels at Halfway, Maryland?
The current sulfur dioxide (SO2) levels in Halfway, Maryland are 0.282 ppb.
What are the current ozone (O3) levels at Halfway, Maryland?
The current ozone (O3) levels at Halfway, Maryland is 28.385 ppm.
What are the current nitrogen dioxide (NO2) levels at Halfway, Maryland?
The current nitrogen dioxide (NO2) levels at Halfway, Maryland is 10.696 ppb.
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