Stay updated with real-time air quality in Lewiston, 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)
25
Good
Lewiston, Maine
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
0.41 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
2.02 μg/m³
0
55
155
255
425
605+
26.74 ppb
0
55
71
86
201
201+
0.42 ppb
0
36
76
186
605
1005+
2.40 ppb
0
54
101
361
1250
2050+
0.14 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Lewiston, Maine
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AQI 24
Good
0.40μg/m³
PM2.5
2.02μg/m³
PM10
25.66ppb
O3
0.70ppb
SO2
1.48ppb
NO2
0.14ppm
CO
AQI 23
Good
0.37μg/m³
PM2.5
2.82μg/m³
PM10
25.39ppb
O3
0.69ppb
SO2
1.48ppb
NO2
0.14ppm
CO
AQI 20
Good
0.39μg/m³
PM2.5
3.32μg/m³
PM10
22.34ppb
O3
0.71ppb
SO2
1.47ppb
NO2
0.15ppm
CO
AQI 20
Good
0.49μg/m³
PM2.5
3.82μg/m³
PM10
21.53ppb
O3
0.70ppb
SO2
1.47ppb
NO2
0.15ppm
CO
AQI 24
Good
0.20μg/m³
PM2.5
2.01μg/m³
PM10
25.64ppb
O3
0.69ppb
SO2
1.48ppb
NO2
0.14ppm
CO
AQI 19
Good
0.49μg/m³
PM2.5
3.88μg/m³
PM10
21.44ppb
O3
0.70ppb
SO2
1.47ppb
NO2
0.15ppm
CO
Air quality and pollutant data for Maine, USA are sourced from ground-based monitors and satellites, adhering to US EPA standards. Machine learning and advanced algorithms enhance the data by incorporating local variables like traffic and population density, ensuring high accuracy and dependability.
Source: Ambee Data Sources
The air quality information for Lewiston, Maine is updated every hour for accuracy.
In the past 24 hours, the air quality in Lewiston, Maine was at its worst at 05:00:00 on 2025-10-31.
In the last 24 hours, the best air quality in Lewiston, Maine was observed at 11:00:00 on 2025-10-31.
As of now, the AQI in Lewiston, Maine is 24, indicating Good conditions.
Lewiston, Maine air has the highest levels of O3.
Poor air quality in Lewiston, Maine means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Lewiston, Maine are currently 0.402 μg/m3.
The PM10 concentration in Lewiston, Maine is 2.011 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Lewiston, Maine is 0.145 ppm.
Currently, Lewiston, Maine has a sulfur dioxide (SO2) concentration of 0.698 ppb.
The current ozone (O3) level in Lewiston, Maine at the moment is 25.676 ppm.
Nitrogen dioxide (NO2) level in Lewiston, Maine at the moment is 1.478 ppb.
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