Watershed, Tertiary

A watershed, also known as a catchment basin, includes all of the land that is drained by a watercourse and its tributaries.

Watersheds are split into 3 categories: primary, secondary and tertiary. Tertiary watersheds are subdivisions of secondary watersheds in Ontario.

These divisions are based on the federal framework originally known as the Water Resources Index Inventory Filing System.

Instructions for downloading this dataset:

  • select the link below and scroll down the metadata record page until you find Transfer Options in the Distribution Information section
  • select the link beside the Data for download label
  • you must provide your name, organization and email address in order to access the dataset

This product requires the use of GIS software.

*[GIS]: geographic information system


Ontario's Open Data Team opengov@ontario.ca


Data Available

The data described here is available for you to use. [Learn more]
[See the licence for how you're allowed to use this data.]

Covers 2002-01-08 - 2010-04-01

Supporting Files

Additional Info

Field Value
Geographic coverage
Geography Breakdown None
Source URL/Address
Author Email
Maintainer branch
Last Validated Date 2020-05-14
Update frequency As required
Access instructions