Guelph’s Outside Water Use Rules, Explained for Lawn Owners (2026 Update)

How the level system works

Guelph’s Outside Water Use Program moves between levels as water supply changes. Level 0 (Blue) is normal conditions with baseline rules. Level 1 (Yellow) tightens the schedule during dry stretches — Guelph moved to Yellow during the dry summers of 2025, for example. Level 2 (Red) means serious supply pressure, and lawn watering is off the table entirely.

The 2026 update: address days and time windows

Under the updated bylaw, lawn watering follows your municipal address: even-numbered addresses water on even-numbered calendar dates, odd-numbered addresses on odd dates. Watering is limited to a maximum of four hours on your day, and only during the low-evaporation windows — between midnight and 9 a.m., or between 5 p.m. and midnight.

Those windows aren’t arbitrary. Midday watering in July can lose a third or more of the water to evaporation before it reaches the roots. The bylaw is essentially forcing the schedule a good lawn company would recommend anyway.

How to keep a lawn green inside these rules

• Water deeply on your address day rather than lightly whenever you remember — deep, infrequent watering grows the roots that survive restrictions.
• Mow at 3 inches. Taller grass shades the soil and needs meaningfully less water.
• Let the lawn go golden in a hot, dry August if you’d rather not water — dormancy is survival mode, not death, and the lawn recovers with September rain.
• New sod or seed? The city has historically offered lawn watering permits for new lawns — check guelph.ca for current details before assuming.

Making four hours count

• Water by zone, not by clock. Run each sprinkler position long enough to deliver about an inch (use the tuna-can test), then move it — four hours is plenty for a typical Guelph lot if the water is landing on the lawn rather than the driveway.
• On clay soils, cycle and soak: 20 minutes on, 20 minutes off, repeat. Clay absorbs slowly and a continuous hour mostly runs off toward the sidewalk.
• Pick the morning window. Evening watering is allowed, but a lawn that sits wet overnight in a humid August is a lawn inviting fungus.
• A rain sensor or a rain gauge tells you when the week’s inch already fell and you can skip your day entirely.

New sod and seed

New lawns need more frequent water than the bylaw’s normal schedule allows, and the City has historically offered a permit for establishing new sod or seed. Apply before the install, keep the permit visible, and follow the light-and-frequent schedule your installer gives you. Check guelph.ca for the current permit process — it has changed with the bylaw update.

What the rules are really for

Guelph is one of the largest communities in Canada drawing almost entirely on groundwater, and the level system exists to keep the aquifer ahead of summer demand. The schedule the bylaw enforces — deep, infrequent, off-peak watering — happens to be exactly what a healthy cool-season lawn wants anyway. A lawn mowed at 3 inches and watered deeply once a week stays greener through a Level 1 summer than a short, daily-sprinkled lawn does with no restrictions at all.