On the notifications page, it is possible to set the notification setting per organization.
If you cannot find your organization in the list (from "Choose an organization"), you may need to follow at least one project for the organization - this is not related to the permission settings of the project within your VCS, but the matter of CircleCI permission. Please make sure you are following projects here: https://app.circleci.com/projects/project-dashboard/<vcs (gh/bb)>/<org-name>/
Following a project enables a user to subscribe to email notifications for the project build status and adds the project to their CircleCI dashboard. (Reference: https://circleci.com/docs/2.0/projects/#add-projects-page)