Definitions for "Point Sources"
Any stationary source that usually releases emissions through stacks at elevated heights for which individual source records are maintained in the inventory and for which annual emissions exceed a specified cut-off level. While no designated cut-off level was used by the Pollution Data Branch to compile the 1995 emissions inventory, the provinces did employ such techniques. The cut-off level, in tonnes of emissions, varied from province to province.
a well defined source of pollution from a single point, such as a pipe (e.g., discharges of wastewater from municipal or industrial plants)
Pollution from a distinct, identifiable source, such as a pipe, smokestack or car exhaust.