Stay updated with real-time air quality in Marshfield, 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)
42
Good
Marshfield, Massachusetts
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.10 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.13 μg/m³
0
55
155
255
425
605+
44.98 ppb
0
55
71
86
201
201+
0.39 ppb
0
36
76
186
605
1005+
10.08 ppb
0
54
101
361
1250
2050+
0.22 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
High
Marshfield, Massachusetts
Marshfield, Massachusetts
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AQI 44
Good
4.04μg/m³
PM2.5
18.47μg/m³
PM10
47.48ppb
O3
0.47ppb
SO2
9.84ppb
NO2
0.19ppm
CO
AQI 40
Good
4.14μg/m³
PM2.5
18.77μg/m³
PM10
43.03ppb
O3
0.47ppb
SO2
10.13ppb
NO2
0.19ppm
CO
AQI 44
Good
4.33μg/m³
PM2.5
18.63μg/m³
PM10
47.04ppb
O3
0.47ppb
SO2
10.01ppb
NO2
0.19ppm
CO
AQI 40
Good
4.08μg/m³
PM2.5
18.47μg/m³
PM10
42.76ppb
O3
0.49ppb
SO2
9.25ppb
NO2
0.18ppm
CO
AQI 40
Good
4.31μg/m³
PM2.5
18.79μg/m³
PM10
42.52ppb
O3
0.49ppb
SO2
9.65ppb
NO2
0.18ppm
CO
AQI 44
Good
4.05μg/m³
PM2.5
13.84μg/m³
PM10
47.27ppb
O3
0.50ppb
SO2
8.98ppb
NO2
0.18ppm
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 Marshfield, Massachusetts is updated every hour for accuracy.
In the past 24 hours, the air quality in Marshfield, Massachusetts was at its worst at 01:00:00 on 2026-05-14.
In the last 24 hours, the best air quality in Marshfield, Massachusetts was observed at 12:00:00 on 2026-05-13.
As of now, the AQI in Marshfield, Massachusetts is 42, indicating Good conditions.
Marshfield, Massachusetts air has the highest levels of O3.
Poor air quality in Marshfield, Massachusetts means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Marshfield, Massachusetts are currently 4.098 μg/m3.
The PM10 concentration in Marshfield, Massachusetts is 15.125 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Marshfield, Massachusetts is 0.219 ppm.
Currently, Marshfield, Massachusetts has a sulfur dioxide (SO2) concentration of 0.394 ppb.
The current ozone (O3) level in Marshfield, Massachusetts at the moment is 44.978 ppm.
Nitrogen dioxide (NO2) level in Marshfield, Massachusetts at the moment is 10.077 ppb.
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