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
4.55 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
19.05 μg/m³
0
55
155
255
425
605+
23.27 ppb
0
55
71
86
201
201+
1.10 ppb
0
36
76
186
605
1005+
2.94 ppb
0
54
101
361
1250
2050+
0.15 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Biddeford, Maine
Biddeford, Maine
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AQI 27
Good
4.60μg/m³
PM2.5
18.54μg/m³
PM10
21.87ppb
O3
1.08ppb
SO2
2.90ppb
NO2
0.15ppm
CO
AQI 22
Good
3.83μg/m³
PM2.5
10.84μg/m³
PM10
23.18ppb
O3
1.13ppb
SO2
2.91ppb
NO2
0.15ppm
CO
AQI 22
Good
4.34μg/m³
PM2.5
12.25μg/m³
PM10
22.00ppb
O3
1.05ppb
SO2
2.80ppb
NO2
0.15ppm
CO
AQI 22
Good
4.24μg/m³
PM2.5
16.51μg/m³
PM10
23.25ppb
O3
1.03ppb
SO2
2.78ppb
NO2
0.15ppm
CO
AQI 22
Good
3.51μg/m³
PM2.5
9.40μg/m³
PM10
23.69ppb
O3
1.15ppb
SO2
2.88ppb
NO2
0.15ppm
CO
AQI 22
Good
4.20μg/m³
PM2.5
22.66μg/m³
PM10
22.19ppb
O3
1.02ppb
SO2
2.78ppb
NO2
0.15ppm
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 08:00:00 on 2026-11-12.
In the last 24 hrs, the best air quality in Biddeford, Maine was observed at 09:00:00 on 2026-11-12.
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 PM2.5.
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 4.549 μg/m3.
The current PM10 concentration at Biddeford, Maine is 19.049 μg/m3.
The current carbon monoxide (CO) concentration at Biddeford, Maine is 0.152 ppm.
The current sulfur dioxide (SO2) concentration at Biddeford, Maine is 1.096 ppb.
The current ozone (O3) concentration at Biddeford, Maine is 23.272 ppm.
The current nitrogen dioxide (NO2) concentration at Biddeford, Maine is 2.944 ppb.
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