Skip to main content

Municipal wastewater operator certification
Collection system & RTB certs

The collection (sewer) system and retention treatment basin (RTB) certified operator rule requirements became effective on April 29, 2026. This means that the Joint Committee on Administrative Rules (JCAR) did not oppose EGLE’s draft rules and allowed the rules to move through the process. You can review the updated rule set and related information.

View the 2024-52 EQ - Sewerage Systems

While the rules are now in effect, communities are not required to comply immediately.

EGLE WRD must first classify collection systems and reclassify RTB systems before the certification requirements apply. At this time, the earliest anticipated timeline for initial system classifications and exam offerings is mid- to late 2028. We are currently developing an implementation strategy and additional supporting materials, which will be shared on this webpage as they become available.

Frequently asked questions (FAQ): Part 41, Sewerage Systems, Administrative Rules Update

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

FAQ: Collection systems

  • What is a contributing municipality?

  • Do the new collection system and RTB certification rules affect other wastewater treatment operator certifications?

FAQ: Retention treatment basin (RTB)

  • Do the new RTB certification requirements affect other wastewater certifications?

  • Can more than one person be certified at an RTB facility?

FAQ: Privately owned systems subject to Part 41

  • How will the addition of Rule 35(4) impact wastewater construction permitting requirements for privately owned sewer or sewerage systems subject to Part 41?

  • When will the requirements of Rule 35(4) be implemented?