Water Flashcards
Part 1: Sediment of Feature 30 requires that a water sample from a project site have a turbidity level of less than ___ nephelometric turbidity units (NTU).
1.0
The Water Concept mainly addresses the quality of water that is being __
ingested
A(n) ___ is a microorganism, including bacteria such as E. coli, naturally found in soil, vegetation, and in the intestinal tract of mammals.
Coliform
Reverse-osmosis (RO) filtration systems are effective at removing containments, but the filtration process wastes about ___ of the incoming supply water.
50% to 80%
A(n) ___ filter is a water filter that contains flakes or granules of a copper-and-zinc alloy.
Kinetic degradation fluxion (KDF)
___ is a major herbicide that is likely to run off or leach into ground and surface water sources.
2,4-Dichlorophenoxyacetic acid (2,4-D)
___ is a disinfectant formed when ammonia is added to chlorine and is commonly used as a secondary disinfectant in public water systems.
Chloramine
Part 3: Fluoride of Feature 34, Public Water Additives, requires that the amount of fluoride in a water supply be limited to less than ___ mg/L.
4.0
Part 3: Microbial Elimination of Feature 36 lists ___ as microbial elimination methods for any water that is used for human consumption or human contact.
UVGI filters and filters rated by the NSF
___ water is water that is not fit for human consumption.
Non-potable
The amount of cloudiness in a liquid caused by suspended solids that are usually invisible to the naked eye.
Pathogen
A water filtration system that uses a semipermeable membrane to filter water.
Reverse-osmosis (RO) filtration system
A bacterium that is found in freshwater and can cause a serious form of pneumonia called Legionnaires’ disease.
Legionella
A water filtration system that uses oxygen-treated carbon to chemically bond with the organic contaminants in water.
Granular activated carbon (GAC) filtration system
A microorganism in its dormant state that is resistant to typical disinfection methods.
Microbial cyst
A compound that forms when chlorine and, to a slightly lesser extent, chloramine react with organic materials in a water supply.
Disinfectant by-product (DBP)
A human-made compound or chemical containing carbon atoms that has leached into ground and surface water from industrial activities, such as the production of plastics.
Organic contaminant
A sterilization method that uses UV light to break down microorganisms by destroying their DNA.
Ultraviolet germicidal irradiation (UVGI)
A chemical that is used to destroy, repel, or control plants or animals.
Pesticide
A popular herbicide that is used to control weeds.
Simazine
Water that is fit for human consumption.
Potable water
A nonselective herbicide that is used in many pesticide formulations, which may result in human exposure through its normal use due to spray drift, residues on food crops, and runoff into drinking water sources.
Glyphosate
A disinfectant by-product formed when chlorine or chloramine reacts with organic matter in water.
Haloacetic acid (HAA)
A naturally occurring chemical that prevents or helps reverse tooth decay.
Flouride
Water that is used for cooling towers, boilers, and industrial processes.
Process water
A compound that contains nutrients that encourage the growth of a plant.
Fertilizer
A highly irritating, greenish-yellow gaseous halogen that can be introduced into a water supply as a gas, sodium hypochlorite solution, or calcium hypochlorite solid.
Chlorine
A chemical pesticide, herbicide, or fertilizer that can be harmful to humans, animals, or the environment if it leaches into a water supply.
Agricultural contaminant
The unit of measure for the turbidity of water.
Nephelometric turbidity unit (NTU)
An infectious biological agent such as a bacterium, virus, or fungus that is capable of causing disease in its host.
Pathogen
A pesticide that is among the most widely used pesticides in the United States to control broadleaf weeds in crops.
Atrazine
An element or compound that may be found in a water supply, occurring from natural sources such as the geology of a location, resulting from human activities such as mining and industry, or leaching into a water supply through outdated or malfunctioning water supply infrastructure.
Inorganic contaminant
A type of pesticide that contains chemicals used to destroy or inhibit the growth of unwanted plants.
Herbicide
A disinfectant by-product that is formed when chlorine reacts with organic matter in water.
Trihalomethane (THM)
A chemical that is used to control or destroy harmful microorganisms as well as prevent their formation on inanimate objects and surfaces or in liquids.
Disinfectant
