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Guelph's municipal water is very hard. A joint Region of Waterloo and City of Guelph study (2012) put the city average at 460 mg/L, about 27 grains per gallon, with a range of 340 to 580 mg/L (roughly 20 to 34 gpg). The reason is the source: the City states that Guelph is the largest city in Canada to rely almost exclusively on groundwater, drawn from limestone and dolomite bedrock that dissolves calcium and magnesium along the way. Your exact number varies within that range, and a free water test confirms it.
Many homes in the communities around Guelph - Arkell, Puslinch, Morriston, Puslinch Lake, Eden Mills and rural Guelph/Eramosa - are on private wells rather than City water. A private well isn't part of the City's municipal supply, so hardness and mineral content vary from property to property and need their own test.

Guelph disinfects its water with chlorine, and UV disinfection is also used in the system. Much of neighbouring Waterloo Region, including Cambridge, uses chloramine instead. Chlorine keeps the water safe, but it's also why tap water can carry a noticeable taste or smell right at the faucet.
If you're on a private well, as many homes around Guelph are, chlorine isn't the issue since wells aren't part of the municipal treatment system. Iron, sulfur, or sediment are more likely culprits, and each needs its own test to confirm.
For most Guelph homes - from Old University and Exhibition Park to Kortright Hills - a whole-home water softener addresses hardness at the source, protecting pipes, water heaters, and appliances, and improving the feel of water for laundry, skin, and hair. Pair it with a chlorine filter for better-tasting tap water, or add a reverse osmosis system for clean, better-tasting drinking water at the tap.
If you're on a private well in Arkell, Puslinch, Morriston, Puslinch Lake, Eden Mills or rural Guelph/Eramosa, your water isn't part of the City's system at all - hardness, iron, and sulfur all need their own test before choosing a system.

Scale on your kettle, spotty dishes, or a water heater working harder than it should?
That's hardness - the Kent DropPro Connect whole-home softener handles it directly, with app-based monitoring so you can see it working.

Both hardness and a chlorine taste or smell from the tap?
The Kent 5.0 Filter + Softener Duplex Tanks System solves both in one install.

Want better-tasting drinking water, with minerals restored?
The Kent NL7 Reverse Osmosis System 7 stages of filtration plus remineralization.

Tight under-sink cabinet, or want the simplest install?
The Kent Vue+ slim casing, runs entirely on water pressure.

On a private well near Guelph?
Well water needs its own test - hardness, iron, and sulfur vary property to property. Start with a well water softener and add iron/sulfur filtration or UV disinfection if your test shows it's needed.

Not sure which one describes your home?
A free water test tells us exactly what you need.

Kent Water installs and services water softening, filtration, and reverse osmosis systems throughout Guelph - from Old University and Exhibition Park to Kortright Hills - and in the surrounding communities of Arkell, Puslinch, Morriston, Puslinch Lake, Eden Mills and rural Guelph/Eramosa. Our technicians handle both new installations and ongoing service calls for City-water and private-well homes.
Rated 4.9 stars on Google - verified via Kent Water's Google Business Profile. Kent Water is a member of the Canadian Water Quality Association (CWQA).
Your water test costs nothing, and there's no obligation to buy anything afterward. Flexible plans and 0% financing are available, along with a 30-Day Trial Period and manufacturer warranty on every system.
Kent Water's coverage extends across the GTA and Southern Ontario. We also serve Mississauga, Cambridge, Brampton, Oakville,Burlington & Milton.