San Marcos AQI History

Hourly air quality data for the past 24 hours in San Marcos, San Marcos.

24-Hour Summary

Average AQI

Peak AQI

Best AQI

Hourly AQI Data

TimeAQICategoryPM2.5PM10
01:00 am164Unhealthy74.074.5
02:00 am162Unhealthy71.271.7
03:00 am155Unhealthy61.762.2
04:00 am152Unhealthy57.558.0
05:00 am148Unhealthy for Sensitive Groups54.654.8
06:00 am89Moderate29.529.7
07:00 am111Unhealthy for Sensitive Groups39.539.8
08:00 am80Moderate24.525.3
09:00 am70Moderate19.520.4
10:00 am65Moderate16.617.6
11:00 am62Moderate15.116.0
12:00 pm63Moderate15.516.4
01:00 pm69Moderate18.519.4
02:00 pm65Moderate16.517.0
03:00 pm63Moderate15.415.7
04:00 pm62Moderate15.015.3
05:00 pm61Moderate14.715.0
06:00 pm73Moderate21.121.4
07:00 pm87Moderate28.228.8
08:00 pm107Unhealthy for Sensitive Groups38.138.9
09:00 pm144Unhealthy for Sensitive Groups52.953.7
10:00 pm148Unhealthy for Sensitive Groups54.454.9
11:00 pm145Unhealthy for Sensitive Groups53.453.9
12:00 am120Unhealthy for Sensitive Groups43.443.8
01:00 am120Unhealthy for Sensitive Groups43.343.8
02:00 am120Unhealthy for Sensitive Groups43.444.0
03:00 am116Unhealthy for Sensitive Groups41.742.0
04:00 am121Unhealthy for Sensitive Groups43.543.9
05:00 am133Unhealthy for Sensitive Groups48.548.8
06:00 am81Moderate25.025.4
07:00 am94Moderate32.232.6
08:00 am87Moderate28.328.6
09:00 am83Moderate26.326.5
10:00 am74Moderate21.221.4
11:00 am74Moderate21.221.4
12:00 pm70Moderate19.219.3
01:00 pm73Moderate20.821.0
02:00 pm60Moderate13.813.9
03:00 pm58Moderate12.612.6
04:00 pm55Moderate11.011.0
05:00 pm56Moderate11.711.8
06:00 pm86Moderate27.928.1
07:00 pm128Unhealthy for Sensitive Groups46.646.8
08:00 pm154Unhealthy60.160.5
09:00 pm161Unhealthy69.470.3
10:00 pm152Unhealthy56.657.2
11:00 pm139Unhealthy for Sensitive Groups50.851.2
12:00 am119Unhealthy for Sensitive Groups42.843.2
01:00 am97Moderate34.034.1
02:00 am93Moderate31.431.5
03:00 am93Moderate31.831.9
04:00 am94Moderate32.232.4
05:00 am98Moderate34.234.3
06:00 am107Unhealthy for Sensitive Groups37.838.2
07:00 am116Unhealthy for Sensitive Groups41.741.9
08:00 am93Moderate31.431.8
09:00 am84Moderate26.727.0
10:00 am80Moderate24.424.7
11:00 am76Moderate22.723.1
12:00 pm74Moderate21.221.6
01:00 pm75Moderate21.922.3
02:00 pm71Moderate20.020.4
03:00 pm68Moderate18.418.8
04:00 pm69Moderate18.819.3
05:00 pm71Moderate19.820.3
06:00 pm80Moderate24.825.6
07:00 pm81Moderate25.125.8
08:00 pm96Moderate33.234.2
09:00 pm122Unhealthy for Sensitive Groups43.944.9
10:00 pm131Unhealthy for Sensitive Groups47.848.5
11:00 pm134Unhealthy for Sensitive Groups48.949.6
12:00 am125Unhealthy for Sensitive Groups45.245.5
01:00 am131Unhealthy for Sensitive Groups47.748.1
02:00 am140Unhealthy for Sensitive Groups51.251.5
03:00 am146Unhealthy for Sensitive Groups53.854.0
04:00 am145Unhealthy for Sensitive Groups53.453.6
05:00 am134Unhealthy for Sensitive Groups49.049.1
06:00 am127Unhealthy for Sensitive Groups46.146.3
07:00 am144Unhealthy for Sensitive Groups53.053.4
08:00 am67Moderate17.718.1
09:00 am55Moderate11.511.7
10:00 am53Moderate10.110.2
11:00 am53Moderate10.110.2
12:00 pm52Moderate9.89.9
01:00 pm52Moderate9.810.0
02:00 pm53Moderate10.010.2
03:00 pm54Moderate10.811.1
04:00 pm55Moderate11.211.6
05:00 pm59Moderate13.313.7
06:00 pm72Moderate20.421.2
07:00 pm99Moderate35.036.2
08:00 pm156Unhealthy63.364.5
09:00 pm155Unhealthy61.962.9
10:00 pm135Unhealthy for Sensitive Groups49.450.6
11:00 pm132Unhealthy for Sensitive Groups48.149.2
12:00 am117Unhealthy for Sensitive Groups41.943.0
01:00 am111Unhealthy for Sensitive Groups39.540.5
02:00 am113Unhealthy for Sensitive Groups40.541.6
03:00 am123Unhealthy for Sensitive Groups44.445.3
04:00 am135Unhealthy for Sensitive Groups49.550.3
05:00 am148Unhealthy for Sensitive Groups54.455.1
06:00 am131Unhealthy for Sensitive Groups47.648.1
07:00 am154Unhealthy59.660.3
08:00 am96Moderate33.434.7
09:00 am72Moderate20.221.5
10:00 am66Moderate17.318.3
11:00 am65Moderate16.417.3
12:00 pm63Moderate15.816.7
01:00 pm65Moderate16.717.6
02:00 pm67Moderate17.518.3
03:00 pm68Moderate18.419.1
04:00 pm71Moderate19.820.3
05:00 pm67Moderate17.918.3
06:00 pm75Moderate21.822.5
07:00 pm97Moderate33.934.3
08:00 pm140Unhealthy for Sensitive Groups51.552.4
09:00 pm160Unhealthy68.269.2
10:00 pm168Unhealthy79.279.9
11:00 pm162Unhealthy71.271.7
12:00 am152Unhealthy56.957.4
01:00 am140Unhealthy for Sensitive Groups51.251.7
02:00 am125Unhealthy for Sensitive Groups45.145.3
03:00 am111Unhealthy for Sensitive Groups39.739.8
04:00 am108Unhealthy for Sensitive Groups38.438.5
05:00 am100Moderate35.235.4
06:00 am94Moderate32.232.5
07:00 am127Unhealthy for Sensitive Groups45.946.1
08:00 am90Moderate30.031.0
09:00 am73Moderate20.721.9
10:00 am67Moderate17.919.2
11:00 am63Moderate15.816.8
12:00 pm62Moderate15.115.7
01:00 pm64Moderate16.216.8
02:00 pm59Moderate13.413.9
03:00 pm61Moderate14.214.7
04:00 pm66Moderate17.117.5
05:00 pm70Moderate19.419.8
06:00 pm79Moderate24.324.9
07:00 pm97Moderate33.934.3
08:00 pm132Unhealthy for Sensitive Groups48.248.7
09:00 pm153Unhealthy58.959.4
10:00 pm159Unhealthy66.467.1
11:00 pm160Unhealthy68.969.6
12:00 am159Unhealthy66.467.1
01:00 am159Unhealthy66.667.3
02:00 am160Unhealthy68.969.4
03:00 am159Unhealthy67.167.5
04:00 am154Unhealthy60.360.8
05:00 am143Unhealthy for Sensitive Groups52.552.9
06:00 am94Moderate32.232.5
07:00 am98Moderate34.234.5
08:00 am65Moderate16.617.1
09:00 am55Moderate11.111.8
10:00 am49Good8.89.5
11:00 am46Good8.39.1
12:00 pm44Good7.98.8
01:00 pm46Good8.29.2
02:00 pm51Moderate9.310.2
03:00 pm55Moderate11.312.2
04:00 pm56Moderate12.012.6
05:00 pm59Moderate13.213.7
06:00 pm75Moderate22.222.7
07:00 pm109Unhealthy for Sensitive Groups38.939.3
08:00 pm138Unhealthy for Sensitive Groups50.651.1
09:00 pm142Unhealthy for Sensitive Groups52.352.7
10:00 pm153Unhealthy58.458.8
11:00 pm153Unhealthy57.758.0
12:00 am139Unhealthy for Sensitive Groups51.051.2
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