As used in this chapter, unless the context clearly requires otherwise:

“Department” means the department of health.

“Director” means the director of health.

“Nonpoint source pollution” means water pollution that does not originate from a point source.

“Person” means any individual, partnership, firm, association, public or private corporation, federal agency, the State or a county, trust, estate, or any other legal entity.

“Point source pollution” means pollution from any discernible, confined, and discrete conveyance, including, but not limited to, any pipe, ditch, channel, tunnel, conduit, well, discrete fissure, container, rolling stock, concentrated animal feeding operation, or vessel or other floating craft, from which pollutants are or may be discharged. This term does not include agricultural stormwater discharges and return flows from irrigated agriculture.

“Pollution” means water pollution.

“Program” means the nonpoint source pollution management and control program established within the department pursuant to this chapter.

“State waters” means all waters, fresh, brackish, or salt, around and within the State including, but not limited to, coastal waters, wetlands, streams, rivers, drainage ditches, ponds, reservoirs, canals, groundwaters, and lakes; provided that drainage ditches, canals, ponds, wetlands, and reservoirs required as a part of a water pollution control system or an irrigation system are excluded.