Nevertheless, a modern research indicated that many enteric viruses are wholly eliminated from secondary effluent for the duration of infiltration through a 30–forty-m-thick vadose zone, resulting in zero virus counts in the monitored groundwater wells101. This indicates that long infiltration occasions substantially cut down the potential risk of groundwater contamination https://www.openlearning.com/u/chomoran-s9i9bo/blog/WastewaterRecoverySystemsForDummies