Wisconsin Collection System Operator Certification
Wisconsin requires a distinct Collection System subclass certification for any wastewater treatment plant that owns its own sanitary sewer collection system. Notably, this is a basic-level-only certification that does not require first passing the general wastewater treatment exam — reflecting Wisconsin's broader subclass-based approach to certifying specific operational competencies rather than requiring a full general wastewater credential first.
Inflow and Infiltration in Older Cities
Inflow and infiltration (I&I) from aging clay and cast-iron sewer infrastructure is a common challenge in older Wisconsin cities, including Milwaukee, Madison, and Green Bay. Collection operators in these systems should be familiar with I&I identification techniques (smoke testing, CCTV inspection, flow monitoring) and rehabilitation met