Wyoming Administrative Code
Agency 020 - Environmental Quality, Dept. of
Sub-Agency 0011 - Water Quality
Chapter 21 - REUSE OF TREATED WATER
Section 21-3 - Definitions

(a) "Agricultural land" is land on which a food crop, a feed crop, or a fiber crop is grown. This includes range land and land used as pasture.

(b) "Agronomic rate" is the wastewater application rate designed to:

(c) "Class A wastewater" is treated wastewater which has received advanced treatment and/or secondary treatment and a level of disinfection so that the maximum number of fecal coliform organisms is 2.2/100 ml or less.

(d) "Class B wastewater" is treated wastewater which has received the equivalent of secondary treatment and a level of disinfection so that the maximum fecal coliform level is greater than 2.2/100 ml but less than 200/100 ml.

(e) "Class C wastewater" is treated wastewater which has received the equivalent of primary treatment and a level of disinfection so that the maximum fecal coliform level is 200/100 ml or greater but less than 1000/100 ml.

(f) "Contaminate a groundwater aquifer" means to introduce a substance that causes the maximum contaminant level for water quality parameters specified in Chapter 8, Wyoming Water Quality Rules and Regulations to be exceeded or that causes the existing concentration of pollutants in ground water to increase when the existing concentration of the parameters in the ground water exceeds the maximum contaminant level specified in Chapter 8, Wyoming Water Quality Rules and Regulations.

(g) "Direct human consumption food crops" are crops consumed directly by humans. These include, but are not limited to fruits, vegetables and grains grown for human consumption.

(h) "Domestic sewage" is waste and wastewater that is primarily from human or household operations that is discharged to or otherwise enters a treatment works.

(i) "Forest" is a tract of land thick with trees and underbrush.

(j) "Ground water" is subsurface water that fills available openings in rock or soil material such that they may be considered water saturated under hydrostatic pressure.

(k) "Indirect human consumption crop" are crops utilized by grazing animals and are thereby one step removed from human consumption.

(l) "Land application" is the spraying or spreading of wastewater onto the land surface or the injection of wastewater below the land surface.

(m) "Land with a high potential for public exposure" is land that the public uses frequently and there are no restrictions or limitations on public access during irrigation periods. This includes, but is not limited to public parks, ball fields, cemeteries, plant nurseries, turf farms, golf courses and a reclamation site located in a populated area (e.g., a construction site located in a city).

(n) "Land with moderate potential for public exposure" is land that is accessible to the public but access is limited during irrigation periods. This would include the facilities in (n) where signing and fencing is provided to restrict access.

(o) "Land with a low potential for public exposure" is land that the public uses infrequently. This includes, but is not limited to agricultural land, forest, and a reclamation site located in an unpopulated area (e.g., a strip mine located in a rural area).

(p) "Municipal wastewater" means the discharge from a publicly owned or controlled treatment system receiving primarily domestic wastewater or a combination of domestic, commercial and industrial wastewater that is normally treated in a primary, secondary or advanced wastewater treatment process.

(q) "Pathogenic organisms" are disease-causing organisms. These include, but are not limited to certain bacteria, protozoa, viruses, and viable helminth ova.

(r) "Pasture" is land on which animals feed directly on feed crops such as legumes, grasses, grain stubble, or stover.

(s) "Permitting authority" is the Department of Environmental Quality, Water Quality Division.

(t) "Pollutant" is an organic substance, an inorganic substance, a combination of organic and inorganic substances, or a pathogenic organism that, after discharge and upon exposure, ingestion, inhalation, or assimilation into an organism either directly from the environment or indirectly by ingestion through the food chain, could, on the basis of information available to the permitting authority, cause death, disease, behavioral abnormalities, cancer, genetic mutations, physiological malfunctions (including malfunctions in reproduction), or physical deformations in either organisms or offspring of the organisms.

(u) "Pollutant limit" is a numerical value that describes the amount of a pollutant allowed per unit amount of wastewater (e.g., milligrams per liter).

(v) "Range land" is open land used for grazing by livestock and/or wildlife on which the natural potential plant community is dominated by grasses, grasslike plants, forbs and shrubs.

(w) "Reclamation site" is drastically disturbed land that is reclaimed using waste-water. This includes, but is not limited to, strip mines and construction sites.

(x) "Runoff" is rainwater, leachate, or other liquid that drains overland on any part of a land surface and runs off of the land surface.

(y) "Treated wastewater" is domestic sewage discharged from a treatment works after completion of the treatment process.

(z) "Treatment works" is either a publicly or privately owned device or system used to treat either domestic sewage or a combination of domestic sewage and commercial or industrial waste of a liquid nature.