Laval Water Restrictions 2026

Laval rebuilt its watering rules for the 2026 season. Under règlement L-12778, lawn watering is now limited to two 90-minute periods per week — three hours in total — regardless of what kind of irrigation system you use.

And the mechanism for assigning those periods is, as far as we can establish, unique among major Canadian cities: your slots are determined by the first three characters of your postal code, combined with your address parity and your system type.

Not your house number alone. Your postal code.

Watering schedule and allowed days

Because the assignment runs off your postal code, there is no rule of thumb that gets you to your own slot. Enter your address on laval.ca and it will return your exact days and times. That is the only reliable route, and it is the single action this page is asking you to take.

Note the generosity hiding in the last row of that table: manual watering of vegetable gardens, flower beds and flowers is permitted every single day, in a morning and an evening window, for every address. The three-hour weekly limit is a lawn rule. Your tomatoes are not rationed.

Why schedule by postal code?

The logic becomes obvious once you see the problem it solves.

Odd/even scheduling splits a city by house number. That is simple to communicate, but it is close to random with respect to geography — odd and even houses sit on the same street, served by the same water main, drawing from the same pressure zone. Splitting them across two days halves the number of properties watering at once, but it does not do anything about where in the network that demand lands.

A postal code, by contrast, is a geographic unit. The first three characters — the forward sortation area — describe a definable district of the city. Assigning watering slots by FSA means Laval can spread demand across the network, not merely across the calendar, keeping neighbourhoods that share infrastructure from all irrigating in the same 90 minutes.

For an island city with a distribution system fed from the rivers around its edges and pushed inland, that is a materially better instrument than parity alone. It is a small piece of genuinely thoughtful public administration, and it deserves more attention than it gets.

Water source and infrastructure

Laval occupies Île Jésus, the island between the Rivière des Prairies to the south — separating it from the island of Montreal — and the Rivière des Mille Îles to the north. Its water is drawn from those rivers, part of the Ottawa River system as it flows into the St. Lawrence, and treated at plants around the island.

As across the Montreal region, raw water is abundant. The rivers surrounding Île Jésus carry far more than the city could ever use, and no realistic drought changes that.

The constraint, again, is treatment and distribution. Laval is a city of over 438,000 people spread across a large, low-density island, which means a lot of distribution network per resident and a lot of single-family housing with lawns. Extensive network plus high irrigation share equals a pronounced summer peak — exactly the profile a demand-management by-law exists to manage.

The 2026 rewrite, with its tighter three-hour allowance and its geographic slot assignment, is a more precise answer to that problem than the schedule it replaced.

Permanent by-law or drought response?

Règlement L-12778 is a permanent seasonal by-law: May 1 to September 30, every year, irrespective of rainfall. It is demand management, sized around treatment and distribution capacity.

It is not a drought response, and Laval has no drought-stage system of the kind used in British Columbia, where Metro Vancouver moved through three different stages in ten weeks during 2026 as reservoir and infrastructure conditions changed. Nothing in the Montreal region faces that sort of supply variability, so nothing in the Montreal region needs that sort of escalating framework.

The practical consequence for a Laval resident is stability. Your slot does not change because it rained, and it does not change because it did not. Look it up once at the start of the season and it holds until September 30.

Co-ownership and condo rules

Quebec's regime differs from both British Columbia's and Ontario's, and the distinction is substantive.

Buildings in divided co-ownership are run by a syndicate of co-owners under the Civil Code of Québec, through a declaration of co-ownership. A declaration cannot oblige a co-owner to act contrary to a municipal by-law, so a syndicate cannot direct watering outside the slots assigned under L-12778.

The enforcement route is weaker than in British Columbia, where the Strata Property Act and section 121 of the Strata Property Act give owners both a clear answer and a cheap forum. Quebec has no express statutory provision of that kind, and co-ownership disputes go to the ordinary courts.

Laval has a large stock of co-ownership housing with landscaped common portions. Where the syndicate operates the irrigation, it carries the obligation — and it must look up the building's slot by postal code like everyone else. A syndicate that has not checked the 2026 schedule is very likely running on last year's times, because the rules changed.

General information only, not legal advice. Strata and condo disputes are handled by the ordinary courts.

Making three hours a week work

Three hours of lawn watering a week is a real constraint, and it rewards technique.

Start by measuring. Put a few straight-sided tins on the lawn and run your system for twenty minutes, then measure the depth collected. That gives you the application rate, and it tells you how much of your 90 minutes you actually need. A lawn wants about 25 mm a week including rainfall, and most systems deliver that well inside the allowance — many residents discover their three hours is more than sufficient once they stop guessing.

Split the allowance across the two periods rather than using one long soak, so the soil has a chance to absorb rather than shed. And subtract rainfall honestly: Laval receives around 1,000 mm a year, well distributed, so summer rain frequently covers a large part of the requirement.

Beyond the lawn, use the daily manual allowance. Vegetable beds, flower borders and containers can be hand-watered every day, morning and evening, without touching your three hours. Drip irrigation and soaker hoses on beds are efficient and keep the lawn allowance for the lawn.

Mulch to 5-7 cm, mow at 7-8 cm, leave the clippings, and let the grass go dormant in a hot August — it recovers with September rain.

What changed for 2026

Laval introduced new watering periods for the 2026 season, and if you learned the rules in a previous summer you are very likely working from a schedule that no longer applies.

The headline change is the move to two 90-minute periods per week — three hours in total — applied uniformly regardless of irrigation system type. Previous arrangements in many municipalities distinguish between automatic and manual systems, giving each different days or windows. Laval has flattened that: an in-ground controller and a hose-end sprinkler now get the same allowance.

That is a defensible simplification. Distinguishing by system type — as Quebec City does — is a more precise way of spreading load, but it is harder to communicate and easier to get wrong. Laval has instead put its precision into where rather than how: by distributing slots according to the first three characters of the postal code, it separates demand geographically across the network, which addresses the same underlying problem from a different angle.

The practical implications for a Laval household are three.

Re-check your slot. Your times may have moved even if your address has not. The lookup on laval.ca is the authoritative source.

Recalculate what you need. Three hours a week is a defined budget, and it is worth knowing how much water that actually delivers. Measure your system's output with straight-sided tins over twenty minutes; most households find their 90-minute period supplies well over the 25 mm a week a lawn requires, meaning the constraint is looser than it sounds.

Reprogramme controllers, and tell your contractor. An automatic system left on last season's schedule is now running at the wrong time. If a landscaping company maintains your grounds — or your co-ownership's — confirm in writing that they have the 2026 slots, because a contractor working across several municipalities is exactly who is most likely to be running an outdated programme.

Common questions about Laval water restrictions

How much lawn watering does Laval allow?

Two 90-minute periods per week — three hours in total — under règlement L-12778, from May 1 to September 30, regardless of irrigation system type.

How do I find my watering times?

Enter your address on laval.ca. Slots are assigned by the first three characters of your postal code together with address parity and system type, so there is no rule of thumb that gets you there.

Why does Laval use postal codes?

A postal code is a geographic unit, so assigning slots by it spreads demand across the distribution network rather than only across the calendar. Odd/even parity splits houses on the same street and same water main; postal code scheduling separates whole districts.

Can I water my vegetable garden?

Yes, every day. Manual watering of vegetable gardens, flower beds and flowers is permitted daily from 6-9 a.m. and 5-8 p.m. for all addresses. The three-hour limit applies to lawns only.

Did the rules change for 2026?

Yes. Laval introduced new watering periods for the 2026 season, so a schedule you learned in a previous year may no longer be correct. Re-check your address.

Where does Laval's water come from?

The Rivière des Prairies and the Rivière des Mille Îles, the two rivers surrounding Île Jésus, treated at plants around the island.

Is this a drought measure?

No. It is a permanent seasonal demand-management by-law. Raw water around Île Jésus is abundant; the constraint is treatment and distribution capacity at summer peak.

Is three hours a week enough for a lawn?

Usually, yes. A lawn needs about 25 mm a week including rainfall, and most systems deliver that within the allowance. Measure your output with straight-sided tins and subtract what the sky provides.