We are a Provincial Association established in 1991
O.A.S.I.S. was established in 1991 to support and represent businesses in the septic, portable toilet and biosolid land application industry. We are dedicated to working with various levels of government, associations and those in related fields to improve and conform to regulations and guidelines pertaining to the sustainability of the environment in the Province of Ontario.
Presently, we have over 165 member companies who work in the Province of Ontario, throughout Canada and North America.