SAN FRANCISCO — At Rainbow Grocery, a cooperative in this city’s Mission District, one brand of water is so popular that it’s often out of stock. But one recent evening, there was a glittering rack of it: glass orbs containing 2.5 gallons of what is billed as “raw water” — unfiltered, untreated, unsterilized spring water, $36.99 each and $14.99 per refill, bottled and marketed by a small company called Live Water.

“It has a vaguely mild sweetness, a nice smooth mouth feel, nothing that overwhelms the flavor profile,” said Kevin Freeman, a shift manager at the store. “Bottled water’s controversial. We’ve curtailed our water selection. But this is totally outside that whole realm.”

Here on the West Coast and in other pockets around the country, many people are looking to get off the water grid.

Start-ups like Live Water in Oregon and Tourmaline Spring in Maine have emerged in the last few years to deliver untreated water on demand. An Arizona company, Zero Mass Water, which installs systems allowing people to collect water directly from the atmosphere around their homes, began taking orders in November from across the United States. It has raised $24 million in venture capital.

And Liquid Eden, a water store that opened in San Diego three years ago, offers a variety of options, including fluoride-free, chlorine-free and a “mineral electrolyte alkaline” drinking water that goes for $2.50 a gallon.

Trisha Kuhlmey, the owner, said the shop sells about 900 gallons of water a day, and sales have doubled every year as the “water consciousness movement” grows…

Read the whole story here.