New Sewage Rules In Muskingum County, only homeowners (with aeration systems) who have been notified by ZMCHD are affected at this time. The Ohio Department of Health has adopted new sewage treatment system rules (Ohio Administrative Code: Chapter 3701-29). These new rules require every sewage treatment system have an Operation Permit to encourage proper maintenance and extend the life of the system. Operational Permits Frequently Asked Questions Aerobic Sewage Treatment Systems ZMCHD Sewage Treatment System Webpage