Kirkland SignatureSpring Water

Disclosure grade B — Partial disclosure

This brand publishes some numbers or ranges in official reports, but not a complete analysis — gaps below are the brand's choice, not ours.

Character

Bands follow the water-sommelier convention (hardness = Ca×2.5 + Mg×4, as CaCO₃; “source protection” is the nitrate measure that world calls virginality) — computed from the values below, never asserted separately.

Where to order

Ways to get Kirkland Signature Spring Water

• Instacart (Costco) →Grocery deliveryCostco via Instacart; no membership required. Spring water is a regional Kirkland item — availability varies by warehouse.
• Costco search →MarketplaceCostco members; US lineup is mainly purified/alkaline/Italian sparkling — spring water is regional, check your local warehouse.
• Instacart Kirkland water hub →Grocery deliveryAll Kirkland Signature waters carried by Costco on Instacart.
• Amazon (resellers) →MarketplaceThird-party resellers only, typically marked up.

h2know doesn’t sell or ship water — we route you to sellers we’ve verified carry it (links checked 2026-09-11). Prices and availability change; none of these links affect our grades, rankings, or quiz results. Currently none are paid placements or affiliate links; if that ever changes we’ll disclose it right here.