Water and Wastewater Terms Beginning P
A B C D E F G H I J K L M N O P Q R S T U V W Y Z
package treatment plant
packer
packer assembly
packing ring
palatable
pan test
parachute
parallel operation
parasitic bacteria
Parshall flume
particle count
particle counter
particle counting
particulate
parts per million (ppm)
Pascal (Pa)
passivating
pass-through
pathogens
PCBs
pCi/L (picoCurie per liter)
PCU (platinum-cobalt units)
peak demand
peaking factor
PEL
penetrator nozzle
penetrometer
penta hose
percent saturation
percolating water
percolation
performance indicator
periphyton
peristaltic pump
permeability
permeate
permissible exposure limit (PEL)
permit-required confined space
pesticide
pet cock
pH
pH test paper
phenolic compounds
phenolphthalein alkalinity
photographic inspections
photosynthesis
physical waste treatment process
phytoplankton
pickle
pico-
picoCurie
pictogram
piezometer
pig
pillows
pilot-scale study
pinpoint floc
pipe bedding
pipe bucket
pipe capacity
pipe cleaning
pipe deflection
pipe diameter
pipe dip
pipe displacement
pipe embedment
pipe gauge
pipe grade
pipe jack
pipe joint
pipe joint seal
pipe liner
pipe plug
pipe rodding
pipe run
pipe schedule
pipe seal
pipe sealing
pipe section
pipe sink
pitless adapter
pitot tube
plan
plankton
planning
plant
plant hydraulic capacity
PLC
plug
plug flow
PMCL (primary maximum contaminant level)
pneumatic ejector
point source
point-of-use/point-of-entry (POU/POE)
polarization
pole shader
pollutant
pollution
polyanionic
polychlorinated biphenyls
polyelectrolyte
polymer
polysaccharide
polyvinyl chloride (PVC)
ponding
pont-a-mousson pressure cell
population equivalent
porcupine
pore
porosity
positive bacteriological sample
positive displacement pump
positive pressure
postchlorination
potable reuse
potable water
potting compounds
POTW (publicly owned treatment works)
POU/POE
power factor
power rodder
pozzolanic process
ppm
preaeration
precautionary statement
prechlorination
precious metal
precipitate
precipitation
precision
precleaning
precoat
precursor, THM
predictive maintenance
preliminary treatment
prescriptive rights
present worth
pressure control
pressure grouting
pressure head
pressure main
prestressed
pretreatment facility
pretreatment inspector
preventive maintenance
preventive maintenance units
primacy
primary clarifier
primary element
primary treatment
prime
priority pollutants
proactive maintenance
probe
process variable
product water
production indicator
profile
programmable logic controller (PLC)
proofing tool
proportional weir
proteinaceous
protoplasm
protozoa
protruding service
protruding tap
Prussian blue
psig (pounds per square inch gauge)
psychrophilic bacteria
pug mill
pump
pump bowl
pump pit
pump station
pumping water level
purge
purveyor, water
putrefaction
putrescible
PVC
pyrometer
