HOLD THE BACKWASH...

In re my earlier post about city/country drinking water, the unthinkable is happening faster than I expected:

"But on Nov. 30, for millions of people here in Orange County, pulling the lever will be the start of a long, intense process to purify the sewage into drinking water —...

On that Friday, the Orange County Water District will turn on what industry experts say is the world's largest plant devoted to purifying sewer water to increase drinking water supplies. They and others hope it serves as a model for authorities worldwide facing persistent drought, predicted water shortages and projected growth."

From Sewage, Added Water for Drinking
(NY Times, subscription required, I think)

That "projected growth" may not be as growy as they expect...