Attention Operators and Operating Authorities: Please be reminded  that Operators-in-Training cannot run limited systems.


An operator-in-training (OIT) certificate allows new operators to gain the one-year experience required to become a Class 1 operator.  The minimum requirements to apply for an OIT certificate are:


  • Ontario Secondary School Diploma (OSSD) or equivalent;

  • Pass OIT examination;

  • Pay the applicable fee.


OIT examinations are written at OWWCO Examination Centres throughout the province. 


Click here for exam schedule.


Operator-in-Training Exam Registration
Drinking Water Operator-in-Training Certificate Issuing
Wastewater Operator-in-Training License Renewal Form

Guidance Documents

Licensing Guide for Operators of Wastewater Treatment Facilities

A Guide to Completing Ministry of the Environment Water and Wastewater Operator Certification and Facility Classification Forms

Guideline No. 2.4: Drinking Water Operator-in-Training Requirements
Guideline No. 3.1: Grade 12 Equivalent
Guideline No. 4.6: Training Requirements and Leave of Absence for Wastewater Operators
Brochure: A Studentís Guide to Drinking Water and Wastewater Operator Certification


Mandatory  - Entry Level Course


Drinking Water Operators-in-Training (OITs) must complete a mandatory Entry Level Course (ELC) during the 16 months in which their OIT certificates are valid.  Following the successful completion of the ELC while holding a valid OIT certificate, the operatorís certificate will be extended to three years from the date it was originally issued.  


The ELC is a mandatory course developed by the Ministry of the Environment and Climate Change (MOECC) for all drinking water operators.  The ELC addresses subject matter that should be known by every entry-level operator.  The course is available to any individual wishing to pursue a career in drinking water treatment through the Walkerton Clean Water Centre

(WCWC).  For more details please contact the WCWC at 1-866-515-0550 or visit their web site: www.wcwc.ca


The ELC is included in the curriculum of certain environmental programs at several Ontario colleges.  Students who graduate from these programs are not required to take the ELC.  For a list of the colleges offering the ELC please visit: https://www.wcwc.ca/en/training/entry-level/



Entry Level Course for Drinking Water Operators

Brochure: A Studentís Guide to Drinking Water and Wastewater Operator Certification