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AutoGC Data by Day by Site (all parameters)

Use this form to retrieve hourly data collected at TCEQ Automated Gas Chromatograph (AutoGC) monitoring stations. Although this is our most current data, it is not considered official until it has been certified by our technical staff. This information is updated hourly.

This web page provides the most current hourly measurement data available. Our convention for time-tagging data is the beginning of each hour. For example, values shown for the noon hour represent a sample collected during the noon hour (noon to 1:00 p.m) and then analyzed at the site during the following hour (1:00 p.m. to 2:00 pm). The noon values will not be available from the site until after 2:00 p.m. This results in an apparent two hour time lag in the data. We also present our data in Local Standard Time for each measuring site regardless of Daylight Savings Time Observance. For most of Texas this is Central Standard Time (sites in El Paso will be in Mountain Standard Time). During Daylight Savings, this introduces another apparent one hour time lag in the data.

Select a date: Use the buttons below to select which date you want reported. Select a Site: View hourly averages for any or all compounds measured at any AutoGC site. Select the site you are interested in from the list below. The compounds you select below will be shown at the selected monitoring site (if that site measures the parameter you select). Please note that not all parameters are measured at all sites.