Stay updated with real-time air quality in Melrose, 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)
28
Good
Melrose, Massachusetts
Last updated: ... (Local time)

Good
Fine
Moderate
Poor
Very poor
Hazardous
1.65 μg/m³
0
12.1
35.5
55.5
250.5
500.5+
6.61 μg/m³
0
55
155
255
425
605+
30.16 ppb
0
55
71
86
201
201+
0.49 ppb
0
36
76
186
605
1005+
1.20 ppb
0
54
101
361
1250
2050+
0.10 ppm
0
4.5
9.5
12.5
230.5
50.5+
Pollen Level
Low
Melrose, Massachusetts
Melrose, Massachusetts
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AQI 44
Good
8.47μg/m³
PM2.5
35.21μg/m³
PM10
4.49ppb
O3
0.58ppb
SO2
19.23ppb
NO2
0.54ppm
CO
AQI 38
Good
6.56μg/m³
PM2.5
28.93μg/m³
PM10
6.58ppb
O3
0.55ppb
SO2
23.03ppb
NO2
0.55ppm
CO
AQI 38
Good
7.49μg/m³
PM2.5
30.31μg/m³
PM10
4.95ppb
O3
0.58ppb
SO2
19.95ppb
NO2
0.54ppm
CO
AQI 44
Good
7.84μg/m³
PM2.5
31.52μg/m³
PM10
4.12ppb
O3
0.61ppb
SO2
18.96ppb
NO2
0.55ppm
CO
AQI 49
Good
9.47μg/m³
PM2.5
40.15μg/m³
PM10
3.94ppb
O3
0.57ppb
SO2
18.82ppb
NO2
0.55ppm
CO
AQI 38
Good
7.23μg/m³
PM2.5
29.71μg/m³
PM10
5.43ppb
O3
0.57ppb
SO2
20.84ppb
NO2
0.54ppm
CO
Air quality measurements for Massachusetts, USA meet strict US EPA standards. These measurements are collected from reliable sources, including satellites and ground-based monitoring systems. Advanced algorithms and machine learning techniques are applied to the data, factoring in variables such as traffic and population density, to ensure precision and reliability.
Source: Ambee Data Sources
Air quality data for Melrose, Massachusetts is updated on an hourly basis.
The worst air quality in Melrose, Massachusetts was recorded at 11:00:00 on 2025-11-03.
The best air quality in Melrose, Massachusetts was recorded at 01:00:00 on 2025-11-02.
The real-time air quality index in Melrose, Massachusetts is 44, currently categorized as Good.
The most common pollutant in Melrose, Massachusetts is PM2.5.
If the air quality in Melrose, Massachusetts is poor, limit outdoor activities and use a mask to safeguard your health.
The measured PM2.5 levels in Melrose, Massachusetts at present are 7.813 μg/m3.
The current PM10 levels in Melrose, Massachusetts are 32.238 μg/m3.
The current carbon monoxide (CO) level in Melrose, Massachusetts is 0.541 ppm.
The current sulfur dioxide (SO2) levels in Melrose, Massachusetts are 0.576 ppb.
The current ozone (O3) levels at Melrose, Massachusetts is 4.963 ppm.
The current nitrogen dioxide (NO2) levels at Melrose, Massachusetts is 20.033 ppb.
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