The MPCA's technical review and approval process for wastewater treatment facilities (WWTF) confirms that proposed WWTF projects will comply with state permits and rules and recognized engineering practices, and meet reliability criteria. To speed the review and approval of your design documents, please complete the applicable checklists from the list below and submit them with your plans and specifications.

Engineering/technical publications


Mechanical treatment process design checklists

Preliminary treatment

Primary and secondary treatment

Tertiary treatment


Municipal biosolids treatment and solids handling

Municipal land treatment: LSTS and RIB

Large subsurface treatment systems (LSTS)

Rapid infiltration basins (RIB)