Table 2. Inclusion and exclusion criteria for literature screening.

Inclusion Criteria	Exclusion Criteria
Study Type: All	Study Type: None
Language: English	Language: Non English
Population: GroundwaterSystems (Municipal,Private, Community,Non-community, Mixed)	Population: Surface waterbodies/watersheds, coastal/marinewater bodies, recreational water
Events/Outcomes: Confirmed contamination ofgroundwater systems by enteric pathogens inNorth America; Confirmed presence offecal indicator organisms inNorth Americangroundwater systems	Events/Outcomes: Groundwatercontamination occurring outsideNorth America,groundwater contaminationby “non-enteric” pathogens
Period: 1990 – present	Period: pre-1990