Breadcrumbs OUCC Water/Sewer Key Cases By Utility Aqua Indiana/Heir Industries sewer rates Aqua Indiana/Heir Industries sewer rates Current sewer rates for Heir Industries, Inc., doing business as Aqua Indiana, Inc., were approved on July 27, 2011. The utility provides service in Clark County.All publicly filed documents in this case are available on the IURC Website by clicking here and entering Cause Number 43949.