Air quality in Lake San Marcos
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
18.2 µg/m³
WHO guideline 15
PM10
34.1 µg/m³
WHO guideline 45
Hour by hour (12h) US EPA AQI
5:00 PM
💨
PM2.5 18.2 µg/m³
64 Moderate
6:00 PM
💨
PM2.5 17.5 µg/m³
62 Moderate
7:00 PM
💨
PM2.5 17.9 µg/m³
63 Moderate
8:00 PM
💨
PM2.5 20.5 µg/m³
69 Moderate
9:00 PM
💨
PM2.5 23.2 µg/m³
74 Moderate
10:00 PM
💨
PM2.5 25.6 µg/m³
79 Moderate
11:00 PM
💨
PM2.5 27.1 µg/m³
83 Moderate
12:00 AM
💨
PM2.5 27.8 µg/m³
84 Moderate
1:00 AM
💨
PM2.5 27.6 µg/m³
84 Moderate
2:00 AM
💨
PM2.5 25 µg/m³
78 Moderate
3:00 AM
💨
PM2.5 22.9 µg/m³
74 Moderate
4:00 AM
💨
PM2.5 21.6 µg/m³
71 Moderate
Next few days daily max · US EPA AQI
Mon
💨
Moderate · UV Moderate
83
Tue
💨
Moderate · UV Moderate
84
Wed
💨
Moderate · UV Moderate
74
Thu
💨
Good · UV Moderate
48
Fri
💨
Moderate · UV High
51
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Precip NEXRAD · NOAA Temp Wind Clouds Terrain