Warrensburg Sewage Treatment Po Box 350 Warrensburg, IL 62573 Phone : (217) 672-8031 Business Category Government Offices-City Village & Twp Legislative Bodies Warrensburg City Of--sewage Treatment Plant Warrensburg, IL 62573 Phone : (217) 672-8031 Business Category Government Offices-City Village & Twp Government Offices State & Local Government Offices & Public Schools