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Data by Month by Site by Parameter

Use this form to retrieve monthly summaries of hourly average data collected at some TREX continuous air 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. During Daylight Savings, this introduces another apparent one-hour time lag in the data.

Select a monitoring site:

View monthly summaries of the hourly averages for all the pollutants and meteorological conditions measured by the TREX at your selected monitoring site. Select the monitoring site you are interested in from the list below. Please note that not all parameters are measured at all sites

This page will refresh when you select a different CAMS from this list.

Always select the CAMS you want before setting any options below (selecting a new CAMS forces this web page to refresh and reset to the previously stored options).

Please select a CAMS from the list above.

PLEASE NOTE: This data has not been verified by the TREX 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 TREX 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.