Glossary of Water and Wastewater Terms
A B C D E F G H I J K L M N O P Q R S T U V W Y Z5 random terms from our glossary
ester
A compound formed by the reaction between an acid and an alcohol with the elimination of a molecule of water.
epidemiology (EP-uh-DE-me-ALL-o-jee)
A branch of medicine that studies epidemics (diseases that affect significant numbers of people during the same time period in the same locality). The objective of epidemiology is to determine the factors that cause epidemic diseases and how to prevent them.
Globally Harmonized System of Classification and Labeling of Chemicals (GHS)
A worldwide initiative to promote standard criteria for classifying chemicals according to their health, physical, and environmental hazards. It uses harmonized pictograms, hazard statements, precautionary statements, and the signal words “danger” and “warning” to communicate hazard information on product labels and safety data sheets (SDSs) in a logical and comprehensive way. The primary goals of the GHS are to enhance the protection of human health and the environment by providing an internationally comprehensible system for hazard communication, to provide a recognized framework for those countries without an existing system, to reduce the need for testing and evaluation of chemicals, and to facilitate international trade in chemicals with hazards that have been properly assessed and identified on an international basis. Also see safety data sheet.
mechanical cleaning
Clearing pipe by using equipment that scrapes, cuts, pulls, or pushes the material out of the pipe. Mechanical cleaning devices or machines include bucket machines, power rodders, and hand rods.
injector water
Service water in which chlorine is added (injected) to form a chlorine solution.
