So where does all this Kirkland bottled water come from? Kirkland Signature bottled water is produced by Niagara Bottling in California. Niagara has been a family-run business since 1963 ...

To determine who makes Kirkland Signature's bottled water, however, all you need to do is look at the label. The source is Niagara Bottling, a California-based company that was founded in 1963.