At a glance

Licence status
Licence required See the source
Annual fees
Not stated by the regulator Check with OWWCO

Your roadmap

Trained in Canada

  • 5 steps without a listed fee
  1. You apply to write the Operator-in-Training exam by completing the Operator-in-Training Examination Registration Form.

    Source
    “To obtain your OIT certificate/licence in one or more of the four system/facility types, you must first apply to write the OIT exam by completing the Operator-in-Training Examination Registration Form.”
    owwco.ca/operators
  2. With your exam application you must provide proof of grade 12 or equivalent and submit a payment.

    Source
    “With your application you will need to provide proof of grade 12 or equivalent and submit a payment.”
    owwco.ca/operators
  3. You write the OIT exam, which has 40 general questions plus modules for Water Treatment, Water Distribution/Supply, Wastewater Treatment and Wastewater Collection, and pass the module for the certificate or licence you want.

    Source
    “In addition to 40 general questions, the OIT exam consists of four sections or modules: Water Treatment, Water Distribution/Supply, Wastewater Treatment and Wastewater Collection.”
    owwco.ca/operators
  4. You complete the mandatory Entry-Level Course for Drinking Water Operators, which is one of the requirements to be eligible for a drinking water certificate.

    Source
    “One of the requirements to be eligible for a drinking water certificate is completing the mandatory Entry-Level Drinking Water Operator Course (ELC).”
    owwco.ca/careers-in-water-and-wastewater
  5. Once your OIT certificates or licences have been issued, you are eligible to obtain operational experience.

    Source
    “Once your OIT certificates or licences have been issued, you are eligible to obtain operational experience.”
    owwco.ca/operators

Listed fees for this route

No one-time fees listed by the regulator for these steps Check with OWWCO

5 steps without a listed fee, so the total may not be the full cost.

Licensed in another province

  • 4 steps without a listed fee
  1. Eligible operators certified in another Canadian province or territory can apply online at no cost to be temporarily deemed certified in Ontario for a one-time, 6-month period.

    Source
    “Eligible operators can apply online at no cost to be temporarily deemed certified in Ontario for a one-time, 6-month period under the *Ontario Labour Mobility Act, 2009*.”
    owwco.ca
  2. You must meet the experience requirements for the certification you are seeking.

    Source
    “- meet the experience requirements;”
    owwco.ca/operators
  3. You must meet the training requirements applicable to your type of certification.

    Source
    “- meet the training requirements applicable to your type of certification;”
    owwco.ca/operators
  4. While working under the temporary deemed certification, you complete and submit the full reciprocity application with the fee and supporting documentation for long-term certification.

    Source
    “- complete and submit the appropriate application along with the fee and supporting documentation.”
    owwco.ca/operators

Listed fees for this route

No one-time fees listed by the regulator for these steps Check with OWWCO

4 steps without a listed fee, so the total may not be the full cost.

Requirements

Education

  • You must provide proof of grade 12 or equivalent with your OIT exam application.

    Source
    “With your application you will need to provide proof of grade 12 or equivalent and submit a payment.”
    owwco.ca/operators

Experience

  • Out-of-province applicants must meet the experience requirements for their type of certification.

    Source
    “- meet the experience requirements;”
    owwco.ca/operators

Other

  • To be eligible for a drinking water certificate you must complete the mandatory Entry-Level Drinking Water Operator Course.

    Source
    “One of the requirements to be eligible for a drinking water certificate is completing the mandatory Entry-Level Drinking Water Operator Course (ELC).”
    owwco.ca/careers-in-water-and-wastewater
  • Out-of-province applicants must meet the training requirements applicable to their type of certification.

    Source
    “- meet the training requirements applicable to your type of certification;”
    owwco.ca/operators

Already licensed in another province?

Extra steps

Source
“This deemed certification allows them to work while completing a full reciprocity application for long-term certification.”
owwco.ca

Processing time: Not stated by the regulator Check with OWWCO

Check a move between two provinces

Credential assessment

Not stated by the regulator Check with OWWCO

Exams

  • OIT exam

    Source
    “To obtain your OIT certificate/licence in one or more of the four system/facility types, you must first apply to write the OIT exam by completing the Operator-in-Training Examination Registration Form.”
    owwco.ca/operators
  • Limited System Operator exam

    Source
    “Apply to write the appropriate Limited System Operator exam using the  Examination Registration Form 2130E:”
    owwco.ca/small-systems

Language tests

Not stated by the regulator Check with OWWCO

Compare scores across provinces and professions

Canadian experience

Not stated by the regulator Check with OWWCO

Supervised practice

Not stated by the regulator Check with OWWCO

Demand and pay

Job Bank wages and outlook in Ontario and Canada
WhereLowMedianHighOutlook
Ontario $27.00 $38.11 $52.00 Good (4 of 5)
Canada $25.00 $36.06 $48.00 —

Wages by region and job outlook in Ontario

Wages in every province and territory

Operators whose work involves water treatments and distributions in other provinces and territories

  • British Columbia Not confirmed yet
  • Alberta Not confirmed yet
  • Saskatchewan Not confirmed yet
  • Manitoba Not confirmed yet
  • Quebec Licence required
  • New Brunswick Not confirmed yet
  • Nova Scotia Not confirmed yet
  • Prince Edward Island Not confirmed yet
  • Newfoundland and Labrador Not confirmed yet
  • Yukon Not confirmed yet
  • Northwest Territories Not confirmed yet
  • Nunavut Not confirmed yet

Compare operators whose work involves water treatment and distribution licensing across Canada

Sources checked

  1. Operators – OWWCO owwco.ca/operators · fetched October 11, 2026
  2. Careers in Water and Wastewater – OWWCO owwco.ca/careers-in-water-and-wastewater · fetched October 11, 2026
  3. OWWCO – Ontario Water Wastewater Certification Office owwco.ca · fetched October 11, 2026
  4. Small Systems – OWWCO owwco.ca/small-systems · fetched October 11, 2026

Frequently asked questions

2

Do you need a licence to work as an operators whose work involves water treatment and distribution in Ontario?

Yes. Registration with the Ontario Water Wastewater Certification Office is required to practise in Ontario.

Which exams are required?

OIT exam, Limited System Operator exam.

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