Glossary The recharge of an aquifer via a well for subsequent recovery aquifer storage and from the same well. recovery baseflow Portion of stream flow that comes from groundwater and not runoff. Decrease in oxygen content in a sample of water caused by the biochemical oxygen bacterial breakdown of organic matter. demand bioretention system Stormwater treatment measure similar to a sand filter, in which vegetation is planted on the top of a soil filter medium; also known as a biofiltration system. A genus of bacteria that is a major cause of diarrhoeal illness. Campylobacter chemical oxygen demand Measure of the amount of organic compounds in water. coliform bacteria A group of bacteria whose presence in drinking water and wastewater can be used as an indicator for operational monitoring. corrective actions Procedures to be followed when monitoring results indicate that a deviation occurs from acceptable criteria. critical control point A step or procedure at which controls can be applied and a hazard can be prevented, eliminated or reduced to acceptable (critical) levels. Microorganism that is highly resistant to disinfection; Cryptosporidium commonly found in lakes and rivers. has Cryptosporidium caused several large outbreaks of gastrointestinal illness with symptoms such as diarrhoea, nausea and stomach cramps. People with severely weakened immune systems are likely to have more severe and more persistent symptoms than healthy individuals (adapted from United States Environmental Protection Agency).
Glossary aquifer storage and recovery The recharge of an aquifer via a well for subsequent recovery from the same well. baseflow Portion of stream flow that comes from groundwater and not runoff. biochemical oxygen demand Decrease in oxygen content in a sample of water caused by the bacterial breakdown of organic matter. bioretention system Stormwater treatment measure similar to a sand filter, in which vegetation is planted on the top of a soil filter medium; also known as a biofiltration system. Campylobacter A genus of bacteria that is a major cause of diarrhoeal illness. chemical oxygen demand Measure of the amount of organic compounds in water. coliform bacteria A group of bacteria whose presence in drinking water and wastewater can be used as an indicator for operational monitoring. corrective actions Procedures to be followed when monitoring results indicate that a deviation occurs from acceptable criteria. critical control point A step or procedure at which controls can be applied and a hazard can be prevented, eliminated or reduced to acceptable (critical) levels. Cryptosporidium Microorganism that is highly resistant to disinfection; commonly found in lakes and rivers. Cryptosporidium has caused several large outbreaks of gastrointestinal illness with symptoms such as diarrhoea, nausea and stomach cramps. People with severely weakened immune systems are likely to have more severe and more persistent symptoms than healthy individuals (adapted from United States Environmental Protection Agency).