CAPCOG San Marcos Staples Road Air Quality
Monitoring Station
· San Marcos, United States
15
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading
Nearby Monitoring Stations
GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
Calibrated
23
9pm
20
15
20
12am
20
20
22
3am
22
22
22
6am
22
22
20
9am
20
20
—
12pm
—
—
—
3pm
—
—
—
6pm
—
—
Station readings
23
15
CAMS model
adj -5
25
25
25
25
25
25
27
27
27
27
27
27
25
25
25
Air Quality Trend (24h)
PM2.53.6 µg/m³
✓ WHO
Good
Gas Pollutants
O₃
55.0
µg/m³
Nearby Monitoring Stations
Nearby Cities
Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-05-29T00:23 UTC.