Understanding Hard Water in Chicagoland
Chicago and the surrounding suburbs sit on limestone bedrock, which gives our water some of the highest hardness levels in the country (often 8–14 GPG). That's the mineral content that crusts your faucets, dulls your laundry, and shortens the life of every appliance that touches water. A softener swaps those calcium and magnesium ions for sodium, protecting your plumbing and giving you that 'slippery' clean-water feel.