Michael L. Biggs was the only person working as a wastewater treatment plant operator.
The data was gathered by the Mackinac Center for Public Policy. The Mackinac Center for Public Policy is a nonprofit research and educational institute.
Sunday, November 16, 2025

Michael L. Biggs was the only person working as a wastewater treatment plant operator.
The data was gathered by the Mackinac Center for Public Policy. The Mackinac Center for Public Policy is a nonprofit research and educational institute.