NRS 519A.093: “Point source” defined.

“Point source” means any discernible, confined and discrete conveyance from which pollutants are or may be discharged, including, without limitation, any pipe, ditch, channel, conduit, well, discrete fissure, container, rolling stock, concentrated animal feeding operation, wheeled, track, stationary or floating equipment used for earth-moving activities or vessel or other floating craft. The term does not include return flows from irrigated agriculture.