Water and Wastewater Terms Beginning O

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

O&M Manual (operation and maintenance manual)
obligate aerobes
obstruction
Occupational Safety and Health Administration
odor panel
odor threshold
off line
off pounds
offset
offset invert
offset joint
offset manhole
offset pipe
offset trough
ohm
olfactometer
olfactory fatigue
oligotrophic
operating pressure differential
operating ratio
operator interface
organic
organic waste
organics
organism
organizing
orifice
ORP
orthotolidine
OSH Act of 1970 (Occupational Safety and Health Act of 1970)
OSHA (Occupational Safety and Health Administration)
osmosis
OUCH principle
outfall
outfall sewer
outlet
overall efficiency, pump
overdraft
overflow manhole
overflow rate
overflow relief line
overhead
overturn
oxidation
oxidation ditch
oxidation state/oxidation number
oxidation-reduction potential (ORP)
oxidation-reduction reaction
oxidized organics
oxidizing agent
oxygen deficiency
oxygen enrichment
ozonation