What's in King's drinking water?
King City now gets Lake Ontario water through York Region (its two wells are installed but offline), and averaged 131 mg/L hardness in Q2 2026. Nobleton and Schomberg run on groundwater at 264 mg/L, and Ansnorveldt's wells measured 116 mg/L with 40.5 mg/L sodium.
Source: York Region, drinking water quality and monitoring (Q2 2026 averages) · York Region, King City Drinking Water System 2025 Annual Report.
Why reverse osmosis
A reverse osmosis system under the kitchen sink removes chlorine taste, most dissolved solids, sodium, lead and fluoride from drinking and cooking water. In very hard, high-mineral water like parts of King's supply, it's the biggest taste difference you can make.
- Better-tasting water, coffee, tea and ice
- Removes most dissolved solids, sodium and fluoride
- Its own faucet under the sink
- Usually cheaper than bottled water
Compare what you spend now with our bottled water cost calculator.
Reverse osmosis systems for King homes
Standard RO
2, 4 or 5-stage drinking water systems, with a bonus alkaline cartridge on the 5-stage.
See Standard RO
Big Flow RO
Tankless 400 GPD reverse osmosis with a 1:1 waste ratio for bigger households.
See Big Flow ROIn very hard water, a softener in front of the RO system protects the membrane and makes it last longer.
Reverse osmosis nearby
Questions
Is King tap water safe to drink?
Yes. Municipal water is treated and tested under Ontario's drinking water standards. People add RO for taste, minerals, sodium or fluoride.
Does reverse osmosis remove hardness?
At the kitchen tap, yes: RO removes most dissolved minerals. It doesn't treat the rest of the house, which is what a softener is for.
What warranty comes with RO?
Our reverse osmosis systems carry a 3-year warranty, with free installation.
Free in-home water test
Find out what's in your King water
We test your water at your home, show you what's in it, and recommend the system that fits.
- Free
- About 30 minutes
- No obligation