  The self-purification process of water streams is studied and the
physical-chemical mechanism of it is determined. The naturally occurring
self-purification process at the Boyne River site is monitored. Experiments at
several creeks and rivers in GTA area that induced the self-purification
process are provided. As a result, the concentration of polluting agents in the
water decreases up to 100 % depending on the site and pollutants.
