Despite Tuesday's storm, DRS employees are answering emails and phone calls, and completing other essential agency functions. If you have a question about state taxes administered by DRS, email ( or call us (860-297-5962) during regular business hours. Phone wait times are minimal.

Walk-in services at all DRS branch office locations remain suspended.

Email the Priority One Taxpayer Assistance Program:

Please check our Frequently Asked Questions page.

This information is not current and is being provided for reference purposes only

Ruling 89-188


This Ruling has been obsoleted by AN 94(3)

The design of industrial wastewater treatment systems, the design of metal finishing process systems, and the non-design effects outlined in your letter are not subject to the Connecticut sales and use tax under section 12-407(2)(i)(F), of the Connecticut General Statutes, as amended by Public Act No. 89-251.


October 31, 1989