Action to Restore a Clean Humber (ARCH) is an environmental Non-Governmental Organization. ARCH grew in reaction to the fact that a polluted Humber River is harmful to health, recreation and economics. ARCH started in 1989 as an initiative by Luciano Martin promoting united action in the watershed; it was incorporated in 1991 as a non-profit community group of experts and stakeholders with various interests but sharing a common aim of a healthy Humber watershed.