Conservation Halton will be merged into a Western Lake Ontario authority on February 1, 2027 — and Oakville says it is losing its seat

What is changing

On February 1, 2027, Conservation Halton will cease to exist as a separate body. Under amendments to the Conservation Authorities Act, it will be consolidated with Credit Valley Conservation, the Hamilton Conservation Authority and the Niagara Peninsula Conservation Authority into a single Western Lake Ontario Regional Conservation Authority — one of nine regional authorities replacing the province's 36. The Town's October 14 memo to Council states the date and the four predecessor bodies; the Province's March 10, 2026 boundary decision on the Environmental Registry lists the same four under the Western Lake Ontario name.

The Province describes the mechanism as statutory amalgamation: the assets, liabilities and agreements of the existing authorities carry over to the regional body, so permits, partnerships and agreements with municipalities continue. A new Ontario Provincial Conservation Agency, established by amendments in November 2025, oversees the transition and the regional system, with a $3 million annual fund announced in March to support it.

Oakville's seat at the table

The seat count comes from a Tiered Allocation Formula the Province posted for comment in July. Each participating municipality is placed in one of four tiers by its share of the regional authority's population: more than 30 per cent earns four members, 15 to 30 per cent three, 5 to 15 per cent two, and under 5 per cent one. Where only part of a municipality lies within the authority's area, its population is scaled by the share of its land that does; 93.65 per cent of Halton Region falls within the new authority. The formula must be used for the initial appointments; after the transition date, all participating municipalities may instead agree a different split, provided no municipality appoints more than five and the board does not grow.

What the Town told the Province

The Town's comments, submitted before the September 12 deadline and reported to Council on October 15, object to the formula on two grounds. First, a population-based allocation ignores each municipality's physical footprint and its exposure to watershed hazards: the memo says the model 'presents a misalignment between watershed risk and voting power', where municipalities most affected by flooding and shoreline erosion, like Oakville, may have limited ability to influence decisions. Second, confining appointments to upper-tier and single-tier municipalities cuts Oakville from four seats to no direct seats at all.

• The Town asks the Province to consider a hybrid model that weighs population alongside watershed management expertise and risk — vulnerable infrastructure, probability of flooding, and areas that already flood.
• It says it is concerned about reduced influence over flood forecasting, flood mapping and climate adaptation decisions, and a weaker ability to advocate for projects that address local risks.
• It states a preference for a model that lets lower-tier municipalities secure representation on the regional authority directly.

How the Province got here

What it means for Oakville

For residents, nothing changes at the creek bank on February 1: permits, flood warnings and conservation areas continue under the amalgamated body, and the Province says existing agreements carry over. What changes is who decides. Conservation Halton's board today includes four Oakville appointees among Halton Region's 14; the new authority's board of 16 will have three Halton members, chosen by the Region, and the Province does not say how those three are to be shared among Oakville, Burlington, Milton and Halton Hills. The Town's position is that a municipality with what it calls a significant watershed area and exposure to flooding and shoreline erosion should not depend on a regional allocation for its voice on hazard decisions.