Understanding Newmarket's water
Source: York Region, average hardness Q2 2026.
Where does Newmarket's water come from?
Newmarket's water is a mix of Lake Ontario water and groundwater from municipal wells, and it's among the hardest in York Region. Depending on your neighbourhood, you may run into hard water, tannins, iron staining or, on private wells, bacteria.
- Hard water causes scale in appliances, dry skin and soap that won't lather
- Groundwater can carry iron, manganese or tannins, leading to discolouration, staining and poor taste
- Private wells need UV disinfection for safe drinking water
Recommended water treatment for Newmarket homes
We recommend systems based on where your water comes from. Your free in-home test confirms the fit before anything is installed.
Central Newmarket (town water)
Downtown, Gorham-College Manor, Huron Heights, Bristol-London
Softening removes scale; carbon removes chlorine and taste; reverse osmosis gives bottled-quality drinking water.
Stonehaven, Glenway and Woodland Hill
Newer subdivisions on the town supply
Softening plus filtration covers these homes well.
Enhanced Water Softener
Softens hard water and removes chlorine and chloramine in one system.
See Enhanced Water Softener
Standard RO
2, 4 or 5-stage drinking water systems, with a bonus alkaline cartridge on the 5-stage.
See Standard RO
ClearBlu Plus
Filters every tap and shower: chlorine, chloramine, sediment, taste and odour.
See ClearBlu PlusEast and north Newmarket, well water
Near Leslie St. north, St. John's Sideroad and Mulock Dr.
Iron or tannin treatment based on your test, a softener, and UV disinfection.
SoftBlu Water Softener
High-capacity softener that stops scale on fixtures, kettles and appliances.
See SoftBlu Water Softener
Iron & Manganese Filter
Birm media removes iron, manganese and the orange or black stains they leave.
See Iron & Manganese Filter
Tannin Eliminator
Clears tea-coloured water and yellow stains caused by tannins.
See Tannin Eliminator
UV Pro
Ultraviolet disinfection for well water: bacteria, viruses and cysts.
See UV ProSigns you may need a water filter
- Limescale on taps or showers
- Dry or brittle skin and hair
- Staining in sinks or laundry
- Musty, earthy or metallic taste or smell
- Cloudy water from a rural well
Nearby cities we also serve
Questions
How hard is Newmarket water?
York Region reported an average of 141 mg/L (about 8.2 grains per gallon) in Q2 2026, the hardest of the York municipalities we serve.
Do I need UV in Newmarket?
Only if you're on a private well. Town water is already disinfected.
Free in-home water test
Find out what's in your Newmarket 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