About 141 mg/L — genuinely hard, not moderately hard, because the supply is lake water blended with groundwater.
Free 10-minute test at your tap · systems from $2,195 installed · no contract, no rental
Hardness is dissolved calcium and magnesium. Past about 120 mg/L it starts quietly costing you — in scale, in soap, and in appliances that die early.
Published municipal averages. Actual hardness shifts by pressure zone and season — an on-site test is the only way to know yours.
That is the published municipal average. Yours moves with your pressure zone and the season, so the only number that decides anything is the one measured at your tap.
It is not dramatic and it is not an emergency. It is a slow efficiency loss on every heated surface in the building — the water heater first, because it runs hottest and you never see inside it.
Newmarket sits at the harder end of York Region, and the reason is worth understanding before anyone quotes you.
Unlike the southern York municipalities, which run largely on treated Lake Ontario water pumped north, Newmarket is on a blended supply — surface water combined with groundwater drawn from wells inside the region. Groundwater picks up dissolved minerals passing through sediment, so blending raises the number. Newmarket lands around 141 mg/L, which crosses the line from moderately hard into genuinely hard, and sits noticeably above what Markham, Vaughan or Richmond Hill see.
The practical effect is that advice written for "York Region" is not reliable here. A homeowner reading a general York figure will underestimate their own water, and a system sized on that assumption will be working harder than intended for its whole life.
Newmarket's older core around Main Street also carries a good deal of pre-war and mid-century housing, where hardness has been passing through the same plumbing for a very long time. In those homes the sensible sequence is sometimes to establish the state of the hot water system first and treat second, rather than protecting equipment that is already near the end of its service life.
A metered softener on the main, sized to your actual hardness rather than to a regional average, and a reverse-osmosis unit under the kitchen sink if you want drinking-grade water at the tap. Municipal supply arrives treated, so iron removal is not usually part of it.
L3X, L3Y
Ion exchange, the whole-home schematic and the well-water treatment order are laid out in detail on the main page — the science is the same everywhere, only the numbers change.
Most homes need one of the first two. If you're on a well, you need the third and it needs a water sample before anyone can quote it honestly.
For municipal supply on lake water. Takes the calcium out before it reaches anything.
Softened water everywhere, plus reverse osmosis at the kitchen tap and the fridge line.
Caledon, King, Uxbridge, Halton Hills, north Durham. Quoted after a lab sample, never before.
Optional service plan from $14/month — annual filter changes, UV lamp replacement, yearly check. Cancel whenever. It isn't required to keep your warranty.
The national providers rent softeners at $30–$48 a month with no end date. Move the sliders and find the month where renting overtakes simply buying the thing.
Rental range reflects published 2026 GTA rates. Purchase range reflects installed market pricing. Salt and servicing excluded — you pay those either way.
| Outright | Typical rental | |
|---|---|---|
| Who owns the equipment | You do, on day one | They do, permanently |
| Contract length | None | Commonly 5–10 years |
| Cost after year ten | No monthly fee | Still $30–$48 every month |
| Repairs and service | 10-year parts typical. Service calls flat-rate after that. | Included — for as long as you keep paying. |
| Cancelling early | Nothing to cancel | Buyout terms apply |
| When you sell the house | Transfers with the home | Buyer assumes it, or you settle |
| Registration against title | Never | Banned in Ontario since 2024 |
| How you get a price | It's on this page | In-home appointment |
Pick a window. We confirm by text, not from a call centre.
Hardness, iron and pH, measured on site in about ten minutes.
Usually about three hours. Drain, bypass and removal of your old unit if you own it. If you rent yours we don’t touch it — it belongs to the rental company, and equipment that goes missing gets billed to you. You arrange collection with them.
Paid once. Stays with the house when you sell it.
Newmarket water measures about 141 mg/L, which is 8.2 grains per gallon — classified hard. Supply: York Region blended supply — Lake Ontario surface water and groundwater. Figures from York Region drinking water quality monitoring, Q2 2026 averages. Actual hardness varies by pressure zone and season, so an on-site test is the only way to know yours exactly.
At 141 mg/L it is a judgement call rather than an emergency. The clearest case is a home with a modern high-efficiency or tankless water heater, which has tighter passages and far less tolerance for scale than the tanks they replaced.
from $2,195 installed, or from $3,290 with reverse osmosis drinking water at the kitchen tap. These are starting prices — the final figure depends on the equipment and the install, and you get it in writing before any work begins. No in-home quote required to see a number.
You own it outright from the day it is installed. There is no monthly rental, no contract term, and nothing registered against your home. It transfers with the house when you sell.
Ten minutes at your tap. Hardness, iron and pH measured on the spot, a straight answer, and a price you already saw on this page.
No obligation, no sales pitch, and nobody stays for coffee.
We'll text you within one business day to confirm a window. Nothing is booked until you reply.