Air quality in Winchester
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
8.4 µg/m³
WHO guideline 15
PM10
13.3 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
7:00 AM
💨
PM2.5 8.4 µg/m³
35Good
8:00 AM
💨
PM2.5 9.3 µg/m³
39Good
9:00 AM
💨
PM2.5 9.9 µg/m³
41Good
10:00 AM
💨
PM2.5 7.1 µg/m³
53Moderate
11:00 AM
💨
PM2.5 5 µg/m³
86Moderate
12:00 PM
💨
PM2.5 3.6 µg/m³
95Moderate
1:00 PM
💨
PM2.5 3 µg/m³
91Moderate
2:00 PM
💨
PM2.5 2.8 µg/m³
88Moderate
3:00 PM
💨
PM2.5 2.9 µg/m³
88Moderate
4:00 PM
💨
PM2.5 2.9 µg/m³
90Moderate
5:00 PM
💨
PM2.5 3 µg/m³
86Moderate
6:00 PM
💨
PM2.5 3.1 µg/m³
80Moderate
Next few days
daily max · US EPA AQI
Wed
💨
Moderate · UV Very high
95
Thu
💨
Moderate · UV Very high
96
Fri
💨
Moderate · UV Very high
81
Sat
💨
Moderate · UV Very high
53