The specific features that will no longer be supported after December 31, 2019 are:
1) Loading of Raw Composite (RC) data. This will be replaced by new duration codes for each of the composite types.
2) UTM coordinates: AQS will no longer support creation of new sites with UTM coordinates, or the output of UTM coordinates on any AQS outputs. Note: There are many tools available on the internet for converting from UTM to Latitude and Longitude, such as the one available from the National Geodetic Survey at https://www.ngs.noaa.gov/cgi-bin/utm_getgp.prl
3) The stand-alone Windows program, QA Transaction Generator, will no longer be supported. It should continue to work in its present state, but it will no longer be available for download, and there will be no bug-fixes or enhancements developed.