Studies investigating waterborne virus contamination in urban groundwaters, percentage of incidence and viruses analyzed in each study.

Purple indicates that the viral DNA or RNA has been analyzed and detected and grey analyzed but not detected in any of the tested samples. AdV: adenovirus, PyV: polyomavirus, EV: enterovirus, NoV: norovirus, RoV: rotavirus, HAV and HEV: hepatitis A and E virus.