Connor Warren, AquaTec Plumbing, September 10, 2026, 4 min read
Crust back on the shower glass days after cleaning, flakes in the kettle, a water heater rumbling years early. We hear it in Newmarket, Keswick and King Township, and in every town the answer starts with a test of your own tap.
Hardness is calcium and magnesium the water picks up before it reaches your tap, and the supply decides how much. Keswick and the rest of Georgina, King City, Stouffville, Bradford, East Gwillimbury and Holland Landing are well-water towns, where many homes draw from private wells that collect those minerals from the ground, often along with iron. We find the same crust on fixtures and heaters in Newmarket and Aurora homes too, so don't assume any supply is soft. Hardness varies from one supply to the next and from well to well, so test your own tap rather than going by your town or a neighbour's result.
Glass usually shows it first:
The same mineral is collecting inside your water heater.
Heat drives calcium out of the water. In a tank heater it settles as a crust on the bottom. Water trapped under it flashes to steam, which is the popping and rumbling you hear, and the tank wears out early. A tankless unit suffers sooner: scale narrows its heat exchanger until hot water flow drops or the unit faults. Dishwashers and washers scale too. See water heater repair and replacement and tankless water heater installation.
Results come in grains per gallon or in milligrams per litre as calcium carbonate. The same water reads far higher in milligrams per litre, so check the unit before comparing results. A store-bought strip confirms hard water but can't size a softener. We sample a tap with nothing ahead of it, then the kitchen to see whether an existing softener still works, and on a well we add iron and pH. Our water testing service explains each reading.
Iron is why a well owner shouldn't just buy a softener. Beyond a trace, iron coats the resin: salt keeps disappearing while orange rings and hard water return. The order is a sediment filter if the well throws sand, then iron and sulphur filtration, then the softener, with UV last where a bacteria sample calls for it. See iron and sulphur in York Region well water and well water treatment.
A softener swaps calcium and magnesium for sodium, the standard way to take hardness out of a whole house. A filter is not a softener: whole-home water filtration removes grit and chlorine taste, and the minerals pass through. Reverse osmosis for drinking water treats one kitchen tap. Salt-free conditioners leave the minerals in, so a test afterwards still reads hard. Or live with it: flush the tank, descale the tankless unit and replace fixtures sooner. Our post on choosing between a water softener and a water filter goes further.
Owners of new builds in Sharon, Queensville, Stouffville and Bradford often ask whether to treat the water before any scale shows. Test first: the result decides it, not the age of the house or what the neighbours installed. If it reads hard, softening early protects a heater that is still clean, ideally before the basement is finished. First check whether the heater is a rental or still covered by the builder or manufacturer. Cost turns on a drain and outlet near the main, whether the builder left a softener loop, and how much finished wall has to open.
Call when the heater rumbles or runs short, a tankless unit loses flow, a softener stops using salt, or orange stains return on a well. The technician samples ahead of any treatment and at the kitchen tap, listens to the heater, checks what flushes from its drain valve, and looks at how an existing softener is set and bypassed. You get a written price before work starts. Call AquaTec Plumbing in Holland Landing at (289) 470-6221, or see water softener installation across York Region.
Talk to a real local plumber, call or book online and we'll take it from here.
