Quick takeaways
- Kanata water hardness: ~125-145 mg/L (moderately hard).
- Softener: worth it for scale prevention on water heaters and appliances. Optional for skin/laundry feel.
- Carbon filter: removes chlorine taste/smell. Cheap, low-maintenance.
- RO drinking system: best-in-class drinking water, only treats the kitchen tap.
Hardness — what Kanata actually has
Ottawa's municipal water (which Kanata uses) sits around 125-145 mg/L of calcium carbonate, which is moderately hard. You'll see scale on glass shower doors and inside kettles, and your water heater will accumulate sediment. Hard enough to be worth softening; not so hard it's an emergency.
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