The EPANET software was developed by Lewis Rossman (US-EPA).

This public-domain software developed by the U.S. EPA,
National Risk Management Research Laboratory in Cincinnati, Ohio.
Although these programs have been used by the U.S. EPA, no warranty,
expressed or implied, is made by the U.S. EPA as to the accuracy and
functioning of the programs and related program material, nor shall the
fact of distribution constitute any such warranty, and no responsibility
is assumed by the U.S. EPA in connection therewith.