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)
24
Good
Lewiston, Maine
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
1.81 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
7.03 μg/m³
0
55
155
255
425
605+
25.91 ppb
0
55
71
86
201
201+
0.51 ppb
0
36
76
186
605
1005+
1.64 ppb
0
54
101
361
1250
2050+
0.18 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Lewiston, Maine
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AQI 23
Good
2.31μg/m³
PM2.5
7.08μg/m³
PM10
25.28ppb
O3
0.42ppb
SO2
1.75ppb
NO2
0.16ppm
CO
AQI 23
Good
2.73μg/m³
PM2.5
10.52μg/m³
PM10
25.45ppb
O3
0.43ppb
SO2
1.73ppb
NO2
0.16ppm
CO
AQI 24
Good
3.30μg/m³
PM2.5
13.86μg/m³
PM10
25.75ppb
O3
0.41ppb
SO2
1.67ppb
NO2
0.16ppm
CO
AQI 24
Good
3.44μg/m³
PM2.5
10.20μg/m³
PM10
25.71ppb
O3
0.22ppb
SO2
1.51ppb
NO2
0.16ppm
CO
AQI 23
Good
2.60μg/m³
PM2.5
5.01μg/m³
PM10
25.00ppb
O3
0.30ppb
SO2
1.82ppb
NO2
0.16ppm
CO
AQI 24
Good
3.42μg/m³
PM2.5
9.99μg/m³
PM10
25.76ppb
O3
0.21ppb
SO2
1.51ppb
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 2026-08-14.
In the last 24 hours, the best air quality in Lewiston, Maine was observed at 11:00:00 on 2026-08-14.
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 1.813 μg/m3.
The PM10 concentration in Lewiston, Maine is 7.028 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Lewiston, Maine is 0.178 ppm.
Currently, Lewiston, Maine has a sulfur dioxide (SO2) concentration of 0.511 ppb.
The current ozone (O3) level in Lewiston, Maine at the moment is 25.914 ppm.
Nitrogen dioxide (NO2) level in Lewiston, Maine at the moment is 1.637 ppb.
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