There are five certification levels for water and wastewater system operators: small systems, level one, level two, level three and level four. Each level has different education, work experience and examination requirements. For example, level one certification requires: (1) a high school diploma, (2) one year of related experience, and (3) successful completion of a training course and exam. Post-secondary education or equivalent is required for level three and four certification. For detailed, official information, see Alberta Environment and Park's Facility operator certification webpage or contact Alberta Environment and Parks.