My guess is they will both put back about the same percentage, but that's hardly the point. The statement was 7 mgd was going to drain the lake, but just Cleveland uses over 30x that, and then there's Detroit, Toledo, Chicago, Milwaukee, etc. I hope whatever pollutants they use are removed. But also know that at least as of a decade ago Cleveland used combined sewers and raw sewage overflows into Lake Erie in every heavy rain. That human waste, along with farm fertilizer runoff is feeding the annual poisonous algae blooms every summer.