all just treated wastewater ...
Published by Arturo Constante, Wastewater Purification - Zero Emissions
all just treated wastewater contains fecal matter that will contaminate the water net, so there's no any official serious standard allowing contaminated water into potable net.
Any water supplied to the water net for human use must be potable when there is responsibility for human health and serious engineering.
I your interest is to have a reliable as affordable wastewater re-purification technology, I suggest our WWPS technology.