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)
20
Good
Gloucester, Massachusetts
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
0.69 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
2.12 μg/m³
0
55
155
255
425
605+
22.35 ppb
0
55
71
86
201
201+
0.90 ppb
0
36
76
186
605
1005+
2.19 ppb
0
54
101
361
1250
2050+
0.24 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Gloucester, Massachusetts
Gloucester, Massachusetts
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AQI 24
Good
0.68μg/m³
PM2.5
4.83μg/m³
PM10
25.57ppb
O3
0.91ppb
SO2
3.13ppb
NO2
0.21ppm
CO
AQI 22
Good
1.21μg/m³
PM2.5
4.76μg/m³
PM10
23.90ppb
O3
0.99ppb
SO2
3.07ppb
NO2
0.27ppm
CO
AQI 23
Good
0.99μg/m³
PM2.5
3.95μg/m³
PM10
24.78ppb
O3
0.92ppb
SO2
2.60ppb
NO2
0.25ppm
CO
AQI 22
Good
1.10μg/m³
PM2.5
4.30μg/m³
PM10
24.18ppb
O3
0.98ppb
SO2
2.50ppb
NO2
0.27ppm
CO
AQI 22
Good
1.14μg/m³
PM2.5
4.49μg/m³
PM10
24.07ppb
O3
0.98ppb
SO2
2.73ppb
NO2
0.27ppm
CO
AQI 22
Good
1.10μg/m³
PM2.5
4.30μg/m³
PM10
24.18ppb
O3
0.98ppb
SO2
2.50ppb
NO2
0.27ppm
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 09:00:00 on 2026-09-28.
In the last 24 hours, the best air quality in Gloucester, Massachusetts was observed at 09:00:00 on 2026-09-28.
As of now, the AQI in Gloucester, Massachusetts is 20, 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 0.688 μg/m3.
The PM10 concentration in Gloucester, Massachusetts is 2.115 μg/m3 at the moment.
The current carbon monoxide (CO) concentration in Gloucester, Massachusetts is 0.242 ppm.
Currently, Gloucester, Massachusetts has a sulfur dioxide (SO2) concentration of 0.898 ppb.
The current ozone (O3) level in Gloucester, Massachusetts at the moment is 22.352 ppm.
Nitrogen dioxide (NO2) level in Gloucester, Massachusetts at the moment is 2.185 ppb.
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