Calgary's Hard Water — The Numbers
Calgary's municipal water supply is sourced from the Bow and Elbow Rivers and has a hardness rating of approximately 180–220 mg/L (milligrams per litre), which places it in the "hard" to "very hard" category. For context, water below 60 mg/L is considered soft; most of Ontario's major cities sit between 80–140 mg/L. Calgary's water is measurably harder than most Canadian cities.
This matters for your appliances because calcium and magnesium minerals in hard water precipitate as scale when water is heated — and most major appliances heat water as their primary function.
How Scale Damages Dishwashers
Dishwashers are the appliance most visibly affected by Calgary's hard water. Scale accumulates in four critical areas:
- Spray arm holes — mineral deposits block the small holes in the spray arms, reducing water pressure and cleaning performance. Our technicians find this as the root cause in most dishwasher leaving spots calls.
- Heating element — scale coats the heating element, reducing its efficiency and eventually causing premature failure. A scale-coated element has to work harder to reach the same temperature, increasing energy use and wear.
- Water inlet valve screens — scale particles accumulate on the small screens in the inlet valve, reducing water flow and causing fill issues.
- Door seals — mineral buildup on the door gasket sealing surfaces reduces seal effectiveness over time.
How Scale Damages Washing Machines
Washing machines in Calgary face similar mineral accumulation, with distinct effects by appliance type:
- Heating elements (front-loaders with wash heaters) — scale reduces heating efficiency, affecting wash performance and element lifespan
- Water inlet valves — scale on inlet valve screens reduces fill rates and causes inconsistent water levels
- Drum bearings — hard water combined with detergent residue creates a film that accelerates bearing wear over time
- Detergent drawers — mineral deposits in the detergent drawer prevent complete flushing, contributing to mould and odour
Symptoms of Hard Water Damage in Calgary Appliances
- White spots and film on dishes after dishwasher cycles
- Reduced water pressure from spray arms — dishes not clean in certain zones
- Dishwasher taking longer than normal to heat wash water
- White scale deposits visible inside the dishwasher tub
- Washer clothes smelling musty despite cleaning cycles
- Reduced water flow during washer fill cycle
Prevention: What Actually Works in Calgary
- Rinse aid — not optional in Calgary. Rinse aid contains surfactants that cause water to sheet off dishes rather than bead, significantly reducing spotting and scale deposition. Fill the rinse aid dispenser monthly.
- Monthly citric acid cycle (dishwasher). Run an empty dishwasher on hot with a dishwasher descaler or citric acid powder in the detergent drawer. This dissolves accumulated calcium deposits before they reach damaging thickness.
- Hot wash cycles periodically. Running a monthly 60°C wash cycle in your washer helps prevent biofilm and detergent residue accumulation.
- Clean inlet valve screens annually. A technician can clean the small screens in water inlet valves during a routine service call, preventing flow restriction before it causes symptoms.
When Prevention Isn't Enough — Repair
When hard water damage has already affected your appliance's performance, professional repair is often more effective than home remedies. Scale on heating elements and inside pump assemblies requires disassembly and mechanical cleaning that isn't possible from the outside.
Our Red Seal certified technicians have extensive experience with Calgary-specific hard water damage patterns. For dishwasher repair Calgary or washer repair Calgary related to hard water damage, call (403) 889-6068.