640.403. Definitions.

MISSOURI STATUTES AND CODES

Definitions.

640.403. As used in sections 640.400 to 640.435, thefollowing terms mean:

(1) "Aquifer", a consolidated or unconsolidated subsurfacewater-bearing geologic formation, group of formations, or part ofa formation, or other geologic deposits, capable of yielding ausable or potentially usable amount of water;

(2) "Contaminant", any physical, chemical, biological orradiological substance in water, including but not limited to,those substances for which maximum contaminant levels areestablished by the department pursuant to sections 640.400 to640.435, this chapter and chapter 644, RSMo;

(3) "Department", the department of natural resources;

(4) "Groundwater", water occurring beneath the surface ofthe ground, including underground watercourses, artesian basins,underground reservoirs and lakes, aquifers, other bodies of waterlocated below the surface of the ground, and water in thesaturated zone;

(5) "Maximum contaminant level", the maximum permissiblelevel established pursuant to this chapter of a contaminant inany water delivered to any user of a public water system;

(6) "Special water quality protection area", a geographicarea meeting specified criteria established after public hearingby the department;

(7) "Surface water", water in lakes and wetlands, and waterin rivers, streams and their tributaries in which water flows forsubstantial periods of the year;

(8) "Watershed", the area that drains into a river, streamor its tributaries;

(9) "Water resources", water in rivers, streams and theirtributaries and water present in aquifers.