Air quality in Melrose
The US Air Quality Index (EPA) grades air from 0 to 500 using fine particles (PM2.5/PM10), ozone and nitrogen dioxide. 0-50 is Good, 51-100 Moderate, 101-150 Unhealthy for Sensitive Groups, and anything higher affects everyone.
US AQI · EPA
109
Unhealthy for Sensitive Groups
PM2.5
38.6 µg/m³
WHO guideline 15
PM10
38.8 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
12:00 AM
💨
PM2.5 38.6 µg/m³
109Unhealthy for Sensitive Groups
1:00 AM
💨
PM2.5 37.6 µg/m³
106Unhealthy for Sensitive Groups
2:00 AM
💨
PM2.5 35.3 µg/m³
100Moderate
3:00 AM
💨
PM2.5 34 µg/m³
97Moderate
4:00 AM
💨
PM2.5 32.5 µg/m³
94Moderate
5:00 AM
💨
PM2.5 30.9 µg/m³
91Moderate
6:00 AM
💨
PM2.5 29.6 µg/m³
88Moderate
7:00 AM
💨
PM2.5 28.4 µg/m³
85Moderate
8:00 AM
💨
PM2.5 28.5 µg/m³
85Moderate
9:00 AM
💨
PM2.5 26.5 µg/m³
81Moderate
10:00 AM
💨
PM2.5 23.9 µg/m³
76Moderate
11:00 AM
💨
PM2.5 21.1 µg/m³
70Moderate
Next few days
daily max · US EPA AQI
Sat
💨
Unhealthy for Sensitive Groups · UV Moderate
109
Sun
💨
Moderate · UV High
95
Mon
💨
Moderate · UV High
54
Tue
💨
Moderate · UV Moderate
59
Wed
💨
Moderate · UV High
58