Ontario.ca allows you to search the data inventories of ministries only. To get the data inventories of agencies, you need to visit each agency website and search for its data inventory.
Or, you can download that information here.
Last updated: March 4, 2018
bundle
bundle exec rake --tasks
bundle exec rake agencies
bundle exec rake inventories > inventories.csv
Copyright (c) 2016 James McKinney, released under the MIT license