ZIP 80201 Water Hardness
Denver, Colorado · Nearest measurement: Denver (11.5 km)
Calcium Carbonate (CaCO₃)
Also: 6.9 GPG · 6.6 °dH
Annual extra cost
$50–$150
Water heater efficiency
Minimal impact
Dishwasher rinse aid
Low/off
Shower filter
Optional
Tools for Your Area
Limescale Cost Estimator
Annual cost for Denver hardness level
Softener ROI Calculator
How long until a softener pays back
Skin & Hair Checker
Eczema and hair damage risk at 118 mg/L
Baby Formula Safety
Is your water safe for infant formula?
Pool Chemical Calculator
Doses for Denver source water
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Data note: Hardness is matched to the nearest verified municipal measurement point for the Denver area. Exact hardness may vary within a ZIP code depending on treatment plant zones. For certified data, request your Consumer Confidence Report (CCR) from your local utility — all US water utilities are required by the EPA to publish this annually.