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Water Quality Trading Program
Nonpoint to Nonpoint Trading
A nonpoint source discharges pollutants from a diffuse area. Nonpoint source pollution enters a water body as runoff from a wide geographic area. Typical examples include polluted runoff from cities, suburbs, and agricultural fields, and air deposition of contaminants.
Nonpoint to nonpoint
trading describes when a nonpoint source pays for more cost effective
controls of polluted runoff elsewhere in its watershed. The incentive
to trade may come from stricter controls that newer sources may face,
such as a new housing development that must control its runoff to a higher
level than previous developments in the same watershed.
