ContaminantDescriptionEPA Designation
AdenovirusesAdenoviruses are medium-sized (90-100 nm), nonenveloped (without an outer lipid bilayer) icosahedral viruses composed of a nucleocapsid and a double-stranded linear DNA genome. There are 57 described serotypes in humans, which are responsible for 5-10% ofCandidate
Aeromonas hydrophilaAeromonas hydrophila is a heterotrophic, Gram-negative, rod-shaped bacterium mainly found in areas with a warm climate. . It can survive in aerobic and anaerobic environments, and can digest materials Candidate
CalicivirusesCaliciviruses that together with the noroviruses, are the most common cause of acute viral gastroenteritis in adults.[1] The type species is Sapporo virus[2] and it is named after Sapporo, Japan where the virus was first discovered.Candidate
CoxsackievirusesCoxsackievirus is a virus that belongs to a family of nonenveloped, linear, positive-sense ssRNA viruses, Picornaviridae and the genus Enterovirus, which also includes poliovirus and echovirus.Candidate
Cyanobacteria, other freshwater algae, and their toxinsCyanobacteria (/sa??æno?bæk?t??ri?/), also known as blue-green bacteria, blue-green algae, and Cyanophyta, is a phylum of bacteria that obtain their energy through photosynthesis.Candidate
EchovirusesAn ECHO (Enteric Cytopathic Human Orphan) virus, is a type of RNA virus that belongs to the genus Enterovirus of the Picornaviridae family.[1] Echoviruses are found in the gastrointestinal tract.Candidate
Helicobacter pyloriHelicobacter pylori (/?h?l?k??bækt?r pa??l?ra?/; H. pylori), previously named Campylobacter pyloridis, is a Gram-negative, microaerophilic bacterium found in the stomach. Candidate
MicrosporidiaThe microsporidia constitute a phylum of spore-forming unicellular parasites. Candidate
Mycobacterium avium intracellulareMycobacterium avium and M. intracellulare (the M. a. complex - MAC) are saprotrophic organisms present in soil and water; entry into hosts is usually via the gastrointestinal tract, but also can be via the lungs. Candidate