We are testing for Enterococcus, a fecal indicator bacteria. The EPA uses this bacteria as an indicator to determine if a recreational area is safe for public use. Enterococci are indicators of the presence of fecal material in water and therefore, of the possible presence of other disease-causing bacteria, viruses, and protozoa. These pathogens can sicken swimmers and others who use rivers and streams for recreation or eat raw shellfish or fish. Other potential health effects can include diseases of the skin, eyes, ears, and respiratory tract.