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)
33
Good
Lewiston, Maine
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
5.93 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
12.11 μg/m³
0
55
155
255
425
605+
28.35 ppb
0
55
71
86
201
201+
0.42 ppb
0
36
76
186
605
1005+
2.73 ppb
0
54
101
361
1250
2050+
0.12 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Lewiston, Maine
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AQI 44
Good
7.82μg/m³
PM2.5
12.20μg/m³
PM10
26.88ppb
O3
0.74ppb
SO2
4.97ppb
NO2
0.12ppm
CO
AQI 49
Good
8.62μg/m³
PM2.5
31.82μg/m³
PM10
26.52ppb
O3
0.77ppb
SO2
5.22ppb
NO2
0.12ppm
CO
AQI 49
Good
8.67μg/m³
PM2.5
33.73μg/m³
PM10
25.68ppb
O3
0.88ppb
SO2
5.68ppb
NO2
0.12ppm
CO
AQI 54
Moderate
11.18μg/m³
PM2.5
21.39μg/m³
PM10
25.08ppb
O3
0.99ppb
SO2
7.44ppb
NO2
0.12ppm
CO
AQI 44
Good
7.60μg/m³
PM2.5
17.01μg/m³
PM10
31.99ppb
O3
0.65ppb
SO2
4.44ppb
NO2
0.12ppm
CO
AQI 54
Moderate
11.06μg/m³
PM2.5
21.51μg/m³
PM10
24.96ppb
O3
0.99ppb
SO2
7.52ppb
NO2
0.12ppm
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 03:00:00 on 2026-06-29.
In the last 24 hours, the best air quality in Lewiston, Maine was observed at 04:00:00 on 2026-06-29.
As of now, the AQI in Lewiston, Maine is 33, indicating Good conditions.
Lewiston, Maine air has the highest levels of PM2.5.
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 5.93 μg/m3.
The PM10 concentration in Lewiston, Maine is 12.113 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Lewiston, Maine is 0.12 ppm.
Currently, Lewiston, Maine has a sulfur dioxide (SO2) concentration of 0.424 ppb.
The current ozone (O3) level in Lewiston, Maine at the moment is 28.348 ppm.
Nitrogen dioxide (NO2) level in Lewiston, Maine at the moment is 2.733 ppb.
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