Air quality in Federal Hill
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
104
Unhealthy for Sensitive Groups
PM2.5
8.6 µg/m³
WHO guideline 15
PM10
9.9 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
1:00 PM
💨
PM2.5 8.6 µg/m³
104Unhealthy for Sensitive Groups
2:00 PM
💨
PM2.5 7.8 µg/m³
106Unhealthy for Sensitive Groups
3:00 PM
💨
PM2.5 7.1 µg/m³
103Unhealthy for Sensitive Groups
4:00 PM
💨
PM2.5 6.8 µg/m³
93Moderate
5:00 PM
💨
PM2.5 7.3 µg/m³
78Moderate
6:00 PM
💨
PM2.5 7.9 µg/m³
60Moderate
7:00 PM
💨
PM2.5 8.4 µg/m³
47Good
8:00 PM
💨
PM2.5 8.6 µg/m³
39Good
9:00 PM
💨
PM2.5 9.9 µg/m³
41Good
10:00 PM
💨
PM2.5 12.9 µg/m³
53Moderate
11:00 PM
💨
PM2.5 12.7 µg/m³
52Moderate
12:00 AM
💨
PM2.5 9.1 µg/m³
38Good
Next few days
daily max · US EPA AQI
Thu
💨
Unhealthy for Sensitive Groups · UV High
106
Fri
💨
Unhealthy for Sensitive Groups · UV High
124
Sat
💨
Unhealthy for Sensitive Groups · UV High
150
Sun
💨
Unhealthy for Sensitive Groups · UV High
124
Mon
💨
Good · UV Very high
49