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)
36
Good
Lewiston, Maine
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
3.72 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
18.15 μg/m³
0
55
155
255
425
605+
39.21 ppb
0
55
71
86
201
201+
0.58 ppb
0
36
76
186
605
1005+
14.28 ppb
0
54
101
361
1250
2050+
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Lewiston, Maine
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AQI 49
Good
8.80μg/m³
PM2.5
25.43μg/m³
PM10
40.51ppb
O3
0.57ppb
SO2
8.22ppb
NO2
0.22ppm
CO
AQI 38
Good
6.71μg/m³
PM2.5
30.44μg/m³
PM10
40.64ppb
O3
0.57ppb
SO2
10.10ppb
NO2
0.23ppm
CO
AQI 35
Good
5.68μg/m³
PM2.5
17.37μg/m³
PM10
37.63ppb
O3
0.65ppb
SO2
10.05ppb
NO2
0.24ppm
CO
AQI 72
Moderate
11.80μg/m³
PM2.5
96.61μg/m³
PM10
35.01ppb
O3
0.64ppb
SO2
9.83ppb
NO2
0.25ppm
CO
AQI 40
Good
7.10μg/m³
PM2.5
42.94μg/m³
PM10
38.65ppb
O3
0.54ppb
SO2
4.55ppb
NO2
0.21ppm
CO
AQI 72
Moderate
11.89μg/m³
PM2.5
98.16μg/m³
PM10
34.85ppb
O3
0.64ppb
SO2
9.90ppb
NO2
0.25ppm
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 09:00:00 on 2025-12-28.
In the last 24 hours, the best air quality in Lewiston, Maine was observed at 09:00:00 on 2025-12-27.
As of now, the AQI in Lewiston, Maine is 49, 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 8.798 μg/m3.
The PM10 concentration in Lewiston, Maine is 25.208 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Lewiston, Maine is 0.221 ppm.
Currently, Lewiston, Maine has a sulfur dioxide (SO2) concentration of 0.572 ppb.
The current ozone (O3) level in Lewiston, Maine at the moment is 40.525 ppm.
Nitrogen dioxide (NO2) level in Lewiston, Maine at the moment is 8.223 ppb.
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