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)
49
Good
Brookline, Massachusetts
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
9.40 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
37.31 μg/m³
0
55
155
255
425
605+
33.41 ppb
0
55
71
86
201
201+
1.17 ppb
0
36
76
186
605
1005+
7.99 ppb
0
54
101
361
1250
2050+
0.14 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Brookline, Massachusetts
Brookline, Massachusetts
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AQI 52
Moderate
10.21μg/m³
PM2.5
43.60μg/m³
PM10
30.23ppb
O3
1.13ppb
SO2
8.23ppb
NO2
0.14ppm
CO
AQI 49
Good
9.33μg/m³
PM2.5
41.29μg/m³
PM10
25.56ppb
O3
0.98ppb
SO2
4.07ppb
NO2
0.15ppm
CO
AQI 52
Moderate
9.83μg/m³
PM2.5
41.03μg/m³
PM10
28.14ppb
O3
1.07ppb
SO2
6.71ppb
NO2
0.14ppm
CO
AQI 52
Moderate
9.65μg/m³
PM2.5
39.05μg/m³
PM10
27.01ppb
O3
1.04ppb
SO2
5.99ppb
NO2
0.14ppm
CO
AQI 54
Moderate
10.79μg/m³
PM2.5
48.28μg/m³
PM10
34.66ppb
O3
0.82ppb
SO2
5.25ppb
NO2
0.14ppm
CO
AQI 52
Moderate
9.63μg/m³
PM2.5
39.20μg/m³
PM10
26.93ppb
O3
1.04ppb
SO2
5.90ppb
NO2
0.14ppm
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 04:00:00 on 2026-06-29.
In the last 24 hours, the best air quality in Brookline, Massachusetts was observed at 11:00:00 on 2026-06-29.
As of now, the AQI in Brookline, Massachusetts is 49, indicating Good conditions.
Brookline, Massachusetts air has the highest levels of PM2.5.
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 9.398 μg/m3.
The PM10 concentration in Brookline, Massachusetts is 37.314 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Brookline, Massachusetts is 0.142 ppm.
Currently, Brookline, Massachusetts has a sulfur dioxide (SO2) concentration of 1.167 ppb.
The current ozone (O3) level in Brookline, Massachusetts at the moment is 33.407 ppm.
Nitrogen dioxide (NO2) level in Brookline, Massachusetts at the moment is 7.988 ppb.
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