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)
19
Good
Lewiston, Maine
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
1.40 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
3.01 μg/m³
0
55
155
255
425
605+
19.62 ppb
0
55
71
86
201
201+
0.48 ppb
0
36
76
186
605
1005+
1.88 ppb
0
54
101
361
1250
2050+
0.20 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Lewiston, Maine
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AQI 19
Good
1.39μg/m³
PM2.5
3.02μg/m³
PM10
19.59ppb
O3
0.48ppb
SO2
1.88ppb
NO2
0.20ppm
CO
AQI 19
Good
1.25μg/m³
PM2.5
4.63μg/m³
PM10
19.93ppb
O3
0.44ppb
SO2
1.90ppb
NO2
0.20ppm
CO
AQI 19
Good
0.92μg/m³
PM2.5
3.46μg/m³
PM10
20.54ppb
O3
0.41ppb
SO2
1.97ppb
NO2
0.20ppm
CO
AQI 19
Good
1.10μg/m³
PM2.5
2.20μg/m³
PM10
19.86ppb
O3
0.17ppb
SO2
2.06ppb
NO2
0.20ppm
CO
AQI 18
Good
1.30μg/m³
PM2.5
4.00μg/m³
PM10
19.00ppb
O3
0.53ppb
SO2
1.44ppb
NO2
0.20ppm
CO
AQI 19
Good
1.09μg/m³
PM2.5
2.08μg/m³
PM10
19.96ppb
O3
0.13ppb
SO2
2.08ppb
NO2
0.20ppm
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 10:00:00 on 2026-09-27.
In the last 24 hours, the best air quality in Lewiston, Maine was observed at 09:00:00 on 2026-09-28.
As of now, the AQI in Lewiston, Maine is 19, 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 1.395 μg/m3.
The PM10 concentration in Lewiston, Maine is 3.014 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Lewiston, Maine is 0.197 ppm.
Currently, Lewiston, Maine has a sulfur dioxide (SO2) concentration of 0.48 ppb.
The current ozone (O3) level in Lewiston, Maine at the moment is 19.616 ppm.
Nitrogen dioxide (NO2) level in Lewiston, Maine at the moment is 1.879 ppb.
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