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Stack Testing Companies


PLEASE NOTE that the information published on this list was compiled by SES as a service to the individual members of SES. This list was not compiled to be used for mass marketing purposes. SES does not endorse, condone or in any way approve of its use for purposes other than those intended. SES strongly discourages the use of this information for purposes other than those determined to be in the best interest of SES. We request that anyone who uses the information on this list use common courtesy and discretion where this information is concerned. Publication of the information does not constitute endorsement by EPA or any company or organization mentioned.

Contact Angela Hansen for any additions, changes, etc. at

The Stack Testing Companies List is voluntarily maintained by the Source Evaluation Society (SES). The information provided for the database is submitted by each company and, as such, it is the responsibility of each company on the list to periodically update and monitor their information to ensure the correctness and accuracy of that information. Failure to do so can result in that company being removed from the list. Also note that the Stack Testing Companies List is a separate database independent of the SES membership database. No cross-checking of the information is made by SES and being an SES member does not mean that your company is automatically added to this list.

This link will allow you to download the current list:


2024 Q1 Stack Testing Companies List