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)
27
Good
Biddeford, Maine
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
1.45 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
6.89 μg/m³
0
55
155
255
425
605+
28.82 ppb
0
55
71
86
201
201+
0.59 ppb
0
36
76
186
605
1005+
2.69 ppb
0
54
101
361
1250
2050+
0.16 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Biddeford, Maine
Biddeford, Maine
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AQI 27
Good
1.45μg/m³
PM2.5
7.54μg/m³
PM10
29.41ppb
O3
0.56ppb
SO2
2.67ppb
NO2
0.16ppm
CO
AQI 24
Good
1.36μg/m³
PM2.5
8.05μg/m³
PM10
26.20ppb
O3
0.81ppb
SO2
2.18ppb
NO2
0.16ppm
CO
AQI 27
Good
1.89μg/m³
PM2.5
8.22μg/m³
PM10
29.37ppb
O3
0.40ppb
SO2
2.58ppb
NO2
0.16ppm
CO
AQI 25
Good
1.50μg/m³
PM2.5
7.58μg/m³
PM10
27.20ppb
O3
0.51ppb
SO2
2.66ppb
NO2
0.16ppm
CO
AQI 24
Good
1.32μg/m³
PM2.5
8.04μg/m³
PM10
26.00ppb
O3
0.84ppb
SO2
2.15ppb
NO2
0.16ppm
CO
AQI 25
Good
1.96μg/m³
PM2.5
8.21μg/m³
PM10
26.86ppb
O3
0.40ppb
SO2
2.58ppb
NO2
0.16ppm
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 01:00:00 on 2026-10-05.
In the last 24 hrs, the best air quality in Biddeford, Maine was observed at 06:00:00 on 2026-10-05.
The current air quality in Biddeford, Maine is 27, 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 1.452 μg/m3.
The current PM10 concentration at Biddeford, Maine is 6.893 μg/m3.
The current carbon monoxide (CO) concentration at Biddeford, Maine is 0.16 ppm.
The current sulfur dioxide (SO2) concentration at Biddeford, Maine is 0.594 ppb.
The current ozone (O3) concentration at Biddeford, Maine is 28.821 ppm.
The current nitrogen dioxide (NO2) concentration at Biddeford, Maine is 2.695 ppb.
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