Air quality in Ketchikan
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.
PM2.5
0.9 µg/m³
WHO guideline 15
PM10
1.4 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
9:00 PM
💨
PM2.5 0.9 µg/m³
20Good
10:00 PM
💨
PM2.5 0.9 µg/m³
19Good
11:00 PM
💨
PM2.5 0.7 µg/m³
18Good
12:00 AM
💨
PM2.5 0.9 µg/m³
18Good
1:00 AM
💨
PM2.5 1 µg/m³
18Good
2:00 AM
💨
PM2.5 1.1 µg/m³
18Good
3:00 AM
💨
PM2.5 1.3 µg/m³
17Good
4:00 AM
💨
PM2.5 1.3 µg/m³
17Good
5:00 AM
💨
PM2.5 1.3 µg/m³
16Good
6:00 AM
💨
PM2.5 1.1 µg/m³
16Good
7:00 AM
💨
PM2.5 1 µg/m³
16Good
8:00 AM
💨
PM2.5 1.1 µg/m³
16Good
Next few days
daily max · US EPA AQI
Tue
💨
Good · UV Moderate
25
Wed
💨
Good · UV Moderate
23