Glossary of Water and Wastewater TermsA B C D E F G H I J K L M N O P Q R S T U V W Y Z
5 random terms from our glossary
Trunk SystemA system of major sewers serving as transporting lines and not as local or lateral sewers.
National Institute of Occupational Safety and Health (NIOSH)See NIOSH.
Maximum Contaminant Level (MCL)The largest allowable amount. MCLs for various water quality indicators are specified in the National Primary Drinking Water Regulations (NPDWR).
Turbidity (ter-BID-it-tee)The cloudy appearance of water caused by the presence of suspended and colloidal matter. In the waterworks field, a turbidity measurement is used to indicate the clarity of water. Technically, turbidity is an optical property of the water based on the amount of light reflected by suspended particles. Turbidity cannot be directly equated to suspended solids because white particles reflect more light than dark-colored particles and many small particles will reflect more light than an equivalent large particle.
A device that can be placed in the outlet of a manhole to cause a settling pond to develop in the manhole invert, thus trapping sand, rocks, and similar debris heavier than water. Also may be installed in outlets from car wash areas. Also see GRIT TRAP.