Stay updated with real-time air quality in Brookline, Massachusetts 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)
21
Good
Brookline, Massachusetts
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
2.90 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
11.30 μg/m³
0
55
155
255
425
605+
23.20 ppb
0
55
71
86
201
201+
0.78 ppb
0
36
76
186
605
1005+
13.44 ppb
0
54
101
361
1250
2050+
0.28 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Moderate
Brookline, Massachusetts
Brookline, Massachusetts
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AQI 21
Good
2.91μg/m³
PM2.5
12.03μg/m³
PM10
22.71ppb
O3
0.96ppb
SO2
13.43ppb
NO2
0.29ppm
CO
AQI 22
Good
3.74μg/m³
PM2.5
16.12μg/m³
PM10
22.67ppb
O3
0.59ppb
SO2
15.00ppb
NO2
0.30ppm
CO
AQI 21
Good
3.04μg/m³
PM2.5
12.46μg/m³
PM10
22.61ppb
O3
0.79ppb
SO2
13.94ppb
NO2
0.29ppm
CO
AQI 21
Good
3.04μg/m³
PM2.5
12.23μg/m³
PM10
22.52ppb
O3
0.68ppb
SO2
14.17ppb
NO2
0.29ppm
CO
AQI 21
Good
3.19μg/m³
PM2.5
15.04μg/m³
PM10
22.82ppb
O3
0.70ppb
SO2
12.79ppb
NO2
0.27ppm
CO
AQI 21
Good
3.06μg/m³
PM2.5
12.37μg/m³
PM10
22.52ppb
O3
0.68ppb
SO2
14.22ppb
NO2
0.29ppm
CO
Air quality and pollutant data for Massachusetts, 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 Brookline, Massachusetts is updated every hour for accuracy.
In the past 24 hours, the air quality in Brookline, Massachusetts was at its worst at 08:00:00 on 2026-10-08.
In the last 24 hours, the best air quality in Brookline, Massachusetts was observed at 12:00:00 on 2026-10-09.
As of now, the AQI in Brookline, Massachusetts is 21, indicating Good conditions.
Brookline, Massachusetts air has the highest levels of O3.
Poor air quality in Brookline, Massachusetts means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Brookline, Massachusetts are currently 2.904 μg/m3.
The PM10 concentration in Brookline, Massachusetts is 11.304 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Brookline, Massachusetts is 0.28 ppm.
Currently, Brookline, Massachusetts has a sulfur dioxide (SO2) concentration of 0.776 ppb.
The current ozone (O3) level in Brookline, Massachusetts at the moment is 22.551 ppm.
Nitrogen dioxide (NO2) level in Brookline, Massachusetts at the moment is 13.461 ppb.
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