On April 29, 2026, new rules were put in place for collection systems and RTB facilities. Collection system, or sewer system, means the network of pipes, drains, manholes, pumps, and related equipment that the public uses to carry household and industrial wastewater to a treatment plant. It serves more than one privately owned property. RTB means a treatment facility that holds and cleans wastewater and stormwater from a combined sewer system during storms. It operates according to the rules in its discharge permit. These rules explain how systems are classified and what certifications operators need.
This FAQ includes questions from public webinars held over the past few years. Most of the questions are related to the new classifications and certification requirements; additional questions about the rule changes are also included.
More webinars and presentations will be offered as the rules are implemented. The Michigan Department of Environment, Great Lakes, and Energy, EGLE also plans to work with an expanded group of stakeholders to support exam development and will continue working with partners like the Michigan Water Environment Association and Michigan Rural Water Association to offer training during the implementation process.
Learn more about the full rulemaking process. You can also find the rulemaking documents and read the final version of the updated rules.
Content updated: August 17, 2026