Air quality in Downey
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
30.4 µg/m³
WHO guideline 15
PM10
33.8 µg/m³
WHO guideline 45
Hour by hour (12h)
US EPA AQI
4:00 AM
💨
PM2.5 30.4 µg/m³
89Moderate
5:00 AM
💨
PM2.5 31.5 µg/m³
92Moderate
6:00 AM
💨
PM2.5 32.6 µg/m³
94Moderate
7:00 AM
💨
PM2.5 33.5 µg/m³
96Moderate
8:00 AM
💨
PM2.5 30 µg/m³
89Moderate
9:00 AM
💨
PM2.5 28.5 µg/m³
85Moderate
10:00 AM
💨
PM2.5 29.6 µg/m³
88Moderate
11:00 AM
💨
PM2.5 30.2 µg/m³
89Moderate
12:00 PM
💨
PM2.5 29.6 µg/m³
88Moderate
1:00 PM
💨
PM2.5 29.6 µg/m³
88Moderate
2:00 PM
💨
PM2.5 29.9 µg/m³
90Moderate
3:00 PM
💨
PM2.5 30 µg/m³
99Moderate
Next few days
daily max · US EPA AQI
Tue
💨
Unhealthy for Sensitive Groups · UV High
121
Wed
💨
Unhealthy · UV Very high
156
Thu
💨
Unhealthy · UV Very high
177
Fri
💨
Unhealthy · UV Very high
199
Sat
💨
Unhealthy for Sensitive Groups · UV Very high
117