Coliform bacteria: Escherichia coli, significant levels
Coliform bacteria …detect water contamination; food (E.Coli)
Level of dissolved oxygen (DO)
Chemical analysis
Chlorination…disinfect drinking water
Indicator species
Cattail contaminated fuel, solvent, organic chemical
Mussel
Bacteria and yeast glow in the presence of a particular toxic chemical
Color and turbidity of the water