Stay updated with real-time air quality in Westbrook, 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)
49
Good
Westbrook, Maine
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
9.04 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
41.51 μg/m³
0
55
155
255
425
605+
26.59 ppb
0
55
71
86
201
201+
0.36 ppb
0
36
76
186
605
1005+
3.14 ppb
0
54
101
361
1250
2050+
0.12 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Westbrook, Maine
Westbrook, Maine
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AQI 49
Good
8.77μg/m³
PM2.5
36.75μg/m³
PM10
23.90ppb
O3
0.86ppb
SO2
5.47ppb
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
AQI 54
Moderate
10.74μg/m³
PM2.5
21.51μg/m³
PM10
24.68ppb
O3
0.96ppb
SO2
7.07ppb
NO2
0.12ppm
CO
AQI 52
Moderate
9.84μg/m³
PM2.5
21.19μg/m³
PM10
24.94ppb
O3
1.00ppb
SO2
7.55ppb
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 49
Good
8.67μg/m³
PM2.5
33.73μg/m³
PM10
25.68ppb
O3
0.88ppb
SO2
5.68ppb
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 Westbrook, Maine is updated every hour for accuracy.
In the past 24 hours, the air quality in Westbrook, Maine was at its worst at 03:00:00 on 2026-06-29.
In the last 24 hours, the best air quality in Westbrook, Maine was observed at 07:00:00 on 2026-06-28.
As of now, the AQI in Westbrook, Maine is 49, indicating Good conditions.
Westbrook, Maine air has the highest levels of PM2.5.
Poor air quality in Westbrook, Maine means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Westbrook, Maine are currently 9.035 μg/m3.
The PM10 concentration in Westbrook, Maine is 41.509 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Westbrook, Maine is 0.121 ppm.
Currently, Westbrook, Maine has a sulfur dioxide (SO2) concentration of 0.363 ppb.
The current ozone (O3) level in Westbrook, Maine at the moment is 26.587 ppm.
Nitrogen dioxide (NO2) level in Westbrook, Maine at the moment is 3.139 ppb.
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