Stay updated with real-time air quality in Biddeford, Maine 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)
37
Good
Biddeford, Maine
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.43 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
24.32 μg/m³
0
55
155
255
425
605+
39.73 ppb
0
55
71
86
201
201+
0.66 ppb
0
36
76
186
605
1005+
14.39 ppb
0
54
101
361
1250
2050+
0.27 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Biddeford, Maine
Biddeford, Maine
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AQI 38
Good
6.80μg/m³
PM2.5
27.88μg/m³
PM10
39.72ppb
O3
0.66ppb
SO2
14.64ppb
NO2
0.27ppm
CO
AQI 37
Good
4.63μg/m³
PM2.5
21.13μg/m³
PM10
39.99ppb
O3
0.66ppb
SO2
14.10ppb
NO2
0.27ppm
CO
AQI 54
Moderate
8.84μg/m³
PM2.5
60.53μg/m³
PM10
38.32ppb
O3
0.65ppb
SO2
13.57ppb
NO2
0.27ppm
CO
AQI 38
Good
6.77μg/m³
PM2.5
27.16μg/m³
PM10
36.70ppb
O3
0.66ppb
SO2
14.59ppb
NO2
0.26ppm
CO
AQI 37
Good
4.63μg/m³
PM2.5
20.40μg/m³
PM10
40.25ppb
O3
0.66ppb
SO2
14.20ppb
NO2
0.28ppm
CO
AQI 46
Good
8.44μg/m³
PM2.5
50.42μg/m³
PM10
34.49ppb
O3
0.66ppb
SO2
14.82ppb
NO2
0.26ppm
CO
Air quality data and pollutant measurements for Maine, USA adhere to strict US EPA standards. The data is collected from multiple reliable sources, including satellites and ground-based monitoring stations. This data is further analyzed and enhanced using machine learning and advanced algorithms that factor in elements such as traffic and population density, ensuring accurate and reliable results.
Source: Ambee Data Sources
The air quality for Biddeford, Maine is updated every hour.
The worst air quality in Biddeford, Maine in the last 24 hours was observed at 09:00:00 on 2025-12-28.
In the last 24 hrs, the best air quality in Biddeford, Maine was observed at 05:00:00 on 2025-12-28.
The current air quality in Biddeford, Maine is 37, categorized as Good based on real-time data.
The most common pollutant in Biddeford, Maine is O3.
If the air quality in Biddeford, Maine is poor, consider staying indoors and wearing a mask to protect yourself.
The current PM2.5 concentration at Biddeford, Maine is 5.427 μg/m3.
The current PM10 concentration at Biddeford, Maine is 24.316 μg/m3.
The current carbon monoxide (CO) concentration at Biddeford, Maine is 0.269 ppm.
The current sulfur dioxide (SO2) concentration at Biddeford, Maine is 0.659 ppb.
The current ozone (O3) concentration at Biddeford, Maine is 39.728 ppm.
The current nitrogen dioxide (NO2) concentration at Biddeford, Maine is 14.387 ppb.
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