Is a Brampton address in a regulated flood area, and whose map says so?

Two conservation authorities share Brampton. The Toronto and Region Conservation Authority's jurisdiction covers the Etobicoke Creek, Humber River and Mimico Creek watersheds, and its own table puts 63% of Brampton's population inside it; its Regulated Area Search takes an address or postal code. Credit Valley Conservation covers the Credit River watershed and publishes a regulation map viewer, updated by its board on 20 February 2026, and a floodplain map viewer. Both authorities say their maps don't show every regulated area, and the City's page says a new unit on regulated land needs the authority's approval before the building permit proceeds.

A regulated-area result governs permits for work near water, such as additions, decks and grading; it is not a forecast that a home will flood, and a home outside the mapped area can still take water through a basement. Each authority answers written property inquiries for a single lot. Under the Conservation Authorities Act as amended in 2026, the Toronto and Region authority is to join the Central Lake Ontario Regional Conservation Authority, and Credit Valley Conservation the Western Lake Ontario Regional Conservation Authority, on 1 February 2027 or a later date set by regulation.

• TRCA Regulated Area Search: the address search for the Toronto and Region Conservation Authority's regulated area
• About TRCA: jurisdiction: the authority's watersheds and the share of each municipality's population inside them
• CVC regulation mapping: Credit Valley Conservation's regulation and floodplain map viewers
• Ontario Regulation 41/24: the regulation behind every conservation authority's regulated area
• Bill 97, Plan to Protect Ontario Act (Budget Measures), 2026: Schedule 3 amends the Conservation Authorities Act; the transition date is 1 February 2027 or a later date set by regulation
• Regional conservation authority boundaries (ERO 025-1257): the Province's decision of 10 March 2026 on which authority joins which of the nine regional authorities

Conservation-authority regulated-area and flood plain checks are not currently included in our reports, so for a Brampton home the authorities' own maps are the place to look. The full report's water and flooding group does cover past floods seen by satellite, nearby creeks, rivers and ponds, and mapped wetlands for any Brampton address.

What we cover, city by city See the sample report