Where does Costco get their water from?
A closer look at the purified water from Niagara Bottling — which has the Kirkland Signature label at Costco — starts with a pretty rigorous purification process occurring in several stages. This begins with sourcing the water itself from vetted wells, springs, or municipal water systems. Warehouse giant Costco sources its Kirkland Signature-brand purified bottled water from Niagara Bottling, a company behind many store brands.Still, Costco notes on its website that what makes its purified bottled water unique from expensive bottled water brands is a proprietary mineral blend that is added as well as the fact that it’s made using state-of-the-art purification, filtration, and reverse osmosis technologies and is bottled using the highest .