@Moon @genmaicha Because if you take 50 gallons and every resident does at what interval let’s say weekly?

That’s 22 million gallons a week. With this document that means 1/7th the water they need is then taken from the system. That’s a 14% increase. So if they are at 6mg/L for epa standard that means they are nearly 1mg/L over the limit for one single barrel per house.

https://fapg.org/images/downloads/Fieldtrips/fapg_segs_virginia_key_diw_guidebook_71.pdf