This study examined the laws of the fifty states, Puerto Rico, and the District of Columbia to identify and analyze enforceable mechanisms for the control of nonpoint source water pollution. An enforceable mechanism consists of a standard applicable to an identified entity or entities; a sanction such as a civil, criminal, or administrative penalty, loss of a license, and performance of required remedial action, but not mere loss of an incentive; and a process, either explicit or implied, for applying the standard and imposing the sanction....
