Stay updated with real-time air quality in Gloucester, 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)
40
Good
Gloucester, Massachusetts
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
4.38 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
15.99 μg/m³
0
55
155
255
425
605+
43.18 ppb
0
55
71
86
201
201+
0.54 ppb
0
36
76
186
605
1005+
6.78 ppb
0
54
101
361
1250
2050+
0.21 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Gloucester, Massachusetts
Gloucester, Massachusetts
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AQI 39
Good
4.54μg/m³
PM2.5
17.98μg/m³
PM10
41.62ppb
O3
0.61ppb
SO2
7.20ppb
NO2
0.15ppm
CO
AQI 37
Good
4.68μg/m³
PM2.5
17.93μg/m³
PM10
39.72ppb
O3
0.58ppb
SO2
5.16ppb
NO2
0.17ppm
CO
AQI 40
Good
4.25μg/m³
PM2.5
12.89μg/m³
PM10
42.70ppb
O3
0.60ppb
SO2
3.74ppb
NO2
0.17ppm
CO
AQI 37
Good
4.71μg/m³
PM2.5
18.13μg/m³
PM10
40.03ppb
O3
0.58ppb
SO2
4.65ppb
NO2
0.17ppm
CO
AQI 37
Good
4.70μg/m³
PM2.5
18.07μg/m³
PM10
39.91ppb
O3
0.58ppb
SO2
4.84ppb
NO2
0.17ppm
CO
AQI 37
Good
4.71μg/m³
PM2.5
18.13μg/m³
PM10
40.03ppb
O3
0.58ppb
SO2
4.65ppb
NO2
0.17ppm
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 Gloucester, Massachusetts is updated every hour for accuracy.
In the past 24 hours, the air quality in Gloucester, Massachusetts was at its worst at 10:00:00 on 2026-05-14.
In the last 24 hours, the best air quality in Gloucester, Massachusetts was observed at 12:00:00 on 2026-05-13.
As of now, the AQI in Gloucester, Massachusetts is 40, indicating Good conditions.
Gloucester, Massachusetts air has the highest levels of O3.
Poor air quality in Gloucester, Massachusetts means it's advisable to stay indoors and wear a mask for your protection.
PM2.5 levels in Gloucester, Massachusetts are currently 4.384 μg/m3.
The PM10 concentration in Gloucester, Massachusetts is 15.994 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Gloucester, Massachusetts is 0.207 ppm.
Currently, Gloucester, Massachusetts has a sulfur dioxide (SO2) concentration of 0.536 ppb.
The current ozone (O3) level in Gloucester, Massachusetts at the moment is 43.181 ppm.
Nitrogen dioxide (NO2) level in Gloucester, Massachusetts at the moment is 6.782 ppb.
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