Well records must be filed for every well that is drilled or modified in Ontario, regardless of the purpose of the well, with two exceptions:
- The well is a test hole or dewatering well that will be abandoned within 30 days of completion
- The alteration made to the well is minor or involves nothing more than the installation of a pump
One record must be filed for every well drilled. However, if a group of wells meet certain conditions, a single record may be filed for a “cluster” of wells.