Chlorination is an interesting question. On the one hand, the paper says the researchers did tests of actual sewage and found it worked in practice. On the othe

Chlorination is an interesting question. On the one hand, the paper says the researchers did tests of actual sewage and found it worked in practice. On the other hand, wikipedia says (https://en.wikipedia.org/wiki/Water_supply_and_sanitation_in_the_Netherlands https://en.wikipedia.org/wiki/Water_supply_and_sanitation_in...) chlorine isn't generally added to the water supply in the Netherlands.