Microorganisms

ContaminantDescriptionEPA Designation
ColiformsColiform bacteria are a commonly used bacterial indicator of sanitary quality of foods and water. They are defined as rod-shaped Gram-negative non-spore forming bacteria which can ferment lactose with the production of acid and gas when incubated at 35-37Regulated
CryptosporidiumCryptosporidium is a single-celled protozoan parasite commonly found in lakes and rivers, especially when the water is contaminated with sewage and animal waste. Regulated
CystsCysts are single-celled protozoan parasites commonly found in lakes and rivers, especially when the water is contaminated with sewage and animal waste. Common cysts include Cryptosporidium and Gairdia lamblia.Regulated
Giardia lambliaGiardia lamblia is a single-celled protozoan parasite that lives in the intestine of infected humans or animals. It is found on surfaces or in soil, food, or water that has been contaminated with the feces from infected humans or animals. Regulated
Heterotrophic plate countThe number of colonies of heterotrophic bacteria grown on selected solid media at a given temperature and incubation period, usually expressed in number of bacteria per milliliter of sample.Regulated
LegionellaA genus of bacteria, some species of which have caused a type of pneumonia called Legionnaires Disease.Regulated
TurbidityTurbidity is a measure of the cloudiness of water. It is used to indicate water quality and filtration effectiveness (e.g., whether disease-causing organisms are present). Higher turbidity levels are often associated with higher levels of disease-causing Regulated
VirusesDisease-causing organisms that grow only inside living cells. Regulated