ZIP 75201 Water Hardness
Dallas, Texas · Nearest measurement: Dallas (1.7 km)
Calcium Carbonate (CaCO₃)
Also: 15.1 GPG · 14.5 °dH
Annual extra cost
$600–$1,200
Water heater efficiency
-8–12% (limescale)
Dishwasher rinse aid
High setting, monthly refill
Shower filter
Strongly recommended
Hard Water in Dallas: What to Do
- • Descale your water heater annually — at 259 mg/L, limescale builds at ~0.5mm/year, costing 8–12% more energy
- • Set your dishwasher's salt level to maximum (5–7) to prevent limescale on the heating element
- • Use a shower filter to reduce mineral deposition on skin and hair — especially important at this hardness level
- • Check your water softener if you have one — at this level, an improperly maintained softener may be working harder than needed
Tools for Your Area
Limescale Cost Estimator
Annual cost for Dallas hardness level
Softener ROI Calculator
How long until a softener pays back
Skin & Hair Checker
Eczema and hair damage risk at 259 mg/L
Baby Formula Safety
Is your water safe for infant formula?
Pool Chemical Calculator
Doses for Dallas source water
Check Another ZIP
Look up any US ZIP code
Data note: Hardness is matched to the nearest verified municipal measurement point for the Dallas 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.