I thought direct chlorination played a larger role, it seems it doesn't.
(Heavy chlorination of water does result in post-treatment chlorine compounds being present, these are themselves an environmental concern. The bulk of the chlorine evaporates or is reacted relatively quickly. Chlorine also negatively impacts "digestors" which process residual organic matter in wastewater.)
UV, oxygenation, sunlight, filtration, and dilution are all utilised as well.
Viruses tend not to survive long periods of environmental exposure outside a host in most circumstances, though I'm not knowledgeable on specifics or exceptions.
This paper discusses treatment and emergent pathogens:
"The Role of Wastewater Treatment in Protecting Water Supplies Against Emerging Pathogens"
https://www.jstor.org/stable/23803199
I thought direct chlorination played a larger role, it seems it doesn't.
(Heavy chlorination of water does result in post-treatment chlorine compounds being present, these are themselves an environmental concern. The bulk of the chlorine evaporates or is reacted relatively quickly. Chlorine also negatively impacts "digestors" which process residual organic matter in wastewater.)
UV, oxygenation, sunlight, filtration, and dilution are all utilised as well.
Viruses tend not to survive long periods of environmental exposure outside a host in most circumstances, though I'm not knowledgeable on specifics or exceptions.