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AutoGC Data by Year by Site by Parameter

Use this form to retrieve hourly data collected at IDEM 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 averaged data available. Our convention for time-tagging data is the beginning of each hour. For example, values shown for the noon hour are based on measurements taken from noon to 1:00 p.m. The noon average will not be calculated until after 1:00 p.m. The noon average will then be available on our external server from 1:15 p.m. to 1:30 p.m. This results in an apparent one-hour time lag in the data. We also present our data in Local Standard Time for each measuring site. For most of Indiana this is Eastern Standard Time. During Daylight Savings, this introduces another apparent one-hour time lag in the data.

Select a Year: Select a Site: View hourly measurements for any compounds measured at any AutoGC site. Select the site you are interested in from the list below. The compound 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.

Once you have made your selections above, click on the Generate Report button.

You may use the controls below to select which parameter and statistics will be included in the report. If you have cookies enabled on your browser, these selections will be "remembered" from session to session.