Fecal coliform are a type of bacteria found in human and animal feces and are an indicator of possible sewage contamination. Although they are not harmful themselves, they indicate the possible presence of pathogenic (disease-causing) bacteria, viruses, and protozoans that also live in human and animal digestive systems. For recreational waters, this group of bacteria was the primary indicator of fecal contamination until relatively recently. New York state continues to use fecal coliform as a water quality standard.