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• absorption
• acre-foot
• action level
• acute
• adsorption
• aeration
• aesthetics
• air gap
• air release/vacuum breaker valves
• aggressive
• alkalinity
• alluvium
• alternating current (AC)
• altitude valve
• alum
• ambient
• American National Standards Institute (ANSI)
• American Society of Civil Engineers (ASCE)
• AWWA (American Water Works Association)
• amoebic dysentery
• anion
• annular space
• apparent color
• appurtenances
• aquifer
• artesian
• as-built drawing
• assembly
• atmospheric vacuum breaker
• atom
• Average Day Demand (ADD)

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• backpressure
• backsiphonage
• backflow
• backwash
• bacteria
• baseline data
• bentonite
• Best Available Technology (BAT)
• Biochemical Oxygen Demand (BOD)
• blended sample
• brake horsepower
• breakpoint chlorination
• breakthrough
• buffer
• butterfly valve
• by-product

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• C (residual disinfectant concentration)
• C-factor
• caisson
• calcium carbonate
• calcium hypochlorite
• capacity
• carbonic acid
• cation
• casing
• cavitation
• centrifugal
• check valve
• chemical compatibility
• chemical containment
• chloramines
• chlorine demand
• chlorine gas
• cholera
• chronic
• coagulant
• coagulation
• Code of Federal Regulations
• coliform bacteria
• colloid
• colorimetric test kit
• combined available chlorine
• community water systems
• composite sample
• comprehensive monitoring plan
• Comprehensive Performance Evaluation (CPE)
• conductivity
• cone of depression
• confined aquifer
• confined space
• confirmation sample
• confluent growth
• consolidated deposits
• constant displacement pump
• Consumer Confidence Report (CCR)
• contact time
• contaminant
• contingency plan
• conventional filtration
• corporation stop
• corrosion
• corrosivity
• cross connection
• cryptosporidiosis
• Cryptosporidium
• curb stop

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• dechlorination
• delineation
• demand
• density
• detention time
• diameter
• diatomaceous earth filtration
• direct current (DC)
• direct service connection
• disinfection
• disinfection by-products (DBPs)
• dissolved solids
• distribution coliform sample
• double check valve assembly
• DPD method
• drawdown

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• eductor
• effluent
• electron
• enzyme
• eutrophication
• evaporation
• evapotranspiration
• exemption

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• fecal coliform
• fire flow
• first customer
• floc
• flocculation
• flow
• flow meters
• fluoridation
• foot valve
• free chlorine residual

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• gaining stream
• galvanic corrosion
• gastroenteritis
• Giardia lamblia
• giardiasis
• grab sample
• Granular Activated Carbon (GAC)
• greensand
• Groundwater Under The Direct Influence of Surface Water (GWUDISW)
• grout

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• HAA5 (Haloacetic Acids 5)
• hardness
• head
• headloss
• heterotrophic plate count (HPC)
• horsepower
• humic
• hydrated lime
• hydrophilic
• hydrophobic
• hydropneumatic pressure tank
• hydrosphere
• hyperchlorination
• hypochlorite
• hypochlorite ion
• hypochlorous acid

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• impeller
• impermeable
• inactivation
• indicator bacteria
• inertia
• infiltration
• inline filtration
• inorganic
• ion
• iron bacteria

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• jet pumps

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• Legionella
• lithosphere
• lock-out/tag-out
• log removal
• losing stream

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• Material Data Safety Sheet (MSDS)
• Maximum Contaminant Level (MCL)
• Maximum Contaminant Level Goal (MCLG)
• methemoglobinemia
• microbe
• micromhos per centimeter (μmhos/cm)
• microscopic particulate analysis
• milligrams per liter (mg/L)
• minimum design standards
• molecule
• multiple barrier concept

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• Nephelometric Turbidity Unit (NTU)
• neutron
• nitrates and nitrites
• non-polar
• non-transient non-community water system
• nutrient

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• Occupational Safety and Health Act (OSHA)
• organic
• overland flow
• oxidation
• oxidizing agent
• ozone

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• palatable
• Part Per Million (PPM)
• pathogenic
• peak demand
• percolation
• perforated interval
• perforation type
• permeability
• pH
• picocurie (pCi)
• piezometric surface
• pitless adapter
• point of application
• polar
• porosity
• positive displacement pump
• potable
• potentiometric surface
• precipitate
• pressure filter
• pressure head
• pressure vacuum breaker assembly
• pressure zones
• primacy
• primary standard
• proton
• protozoa
• pump curve
• pumping water level
• purveyor

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• quicklime

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• radioactivity
• radionuclide
• radius
• receiving stream
• recharge
• reclaimed water
• reduced pressure backflow assembly
• reducing agent
• reduction
• repeat samples
• replacement sample
• reservoir
• residual
• routine sampling

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• Safe Drinking Water Act (SDWA)
• saltwater intrusion
• sample site plan
• sample tap
• sanitary survey
• saturated zone
• seal water
• seasonal source
• secondary standards
• semi-consolidated
• sequestering agent
• service connection
• short-circuiting
• slow sand filtration
• sodium hypochlorite
• softening
• solute
• solvent
• specific capacity
• specific gravity
• spill resistant vacuum breaker
• spores
• spring
• standard methods
• State Revolving Fund (SRF)
• static
• static water level
• sterilization
• stratum
• sublimation
• submersible pump
• suction head
• suction lift
• suction line
• sulfide
• surface runoff
• Surface Water Treatment Rule (SWTR)
• suspended solids
• Synthetic Organic Chemical (SOC)

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• T10
• ten-state standards
• test pump rates
• thrust block
• time of travel
• total coliform bacteria
• Total Dissolved Solids (TDS)
• total dynamic head
• Total Organic Carbon (TOC)
• total residual chlorine
• Total Solids (TS)
• Total Suspended Solids (TSS)
• Total Trihalomethane (TTHM)
• transient non-community water system
• transpiration
• trihalomethane (THM)
• true color
• tuberculation
• turbidity
• turbidity event
• typhoid fever

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• ultraviolet light
• unaccounted-for water
• unconfined aquifer
• unconsolidated deposits

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• vadose zone
• variable displacement pump
• velocity head
• virus
• volatile
• Volatile Organic Compound (VOC)

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• water hammer
• water table
• watershed
• well field
• well cap
• well log report
• well seal
• well slab
• well vent
• well yield
• Wilson’s disease

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• zone of contribution