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AutoGC Data by Month by Site

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 Month: 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.

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

It is strongly recommend that you take a moment to judiciously de-select some compounds below. If you do not, you may flood your browser. Flooding your browser may cause your browser and/or your computer to lock up.

Advanced Options

You may use the checkboxes below to control which parameters will be in the report. If you have cookies enabled on your browser, these selections will be "remembered" from session to session.

PLEASE NOTE: This data has not been verified by the IDEM and may change. This is the most current data, but it is not official until it has been certified by our technical staff. Data is collected from IDEM ambient monitoring sites and may include data collected by other outside agencies. This data is updated hourly. All times shown are in local standard time unless otherwise indicated.