Source water reference · hotel engineering & pool operations
Hotel Water Hardness Atlas
Typical hardness of the municipal or on-site source water feeding hotels in each market, and what that level does to hot-water plant, kitchens, laundries and pools. Figures are total hardness as calcium carbonate.
mg/L as CaCO₃ = ppm
1 gpg (US grains) = 17.1 mg/L
1 °dH (German) = 17.8 mg/L
1 °fH (French) = 10 mg/L
1 °e (Clark) = 14.3 mg/L
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