If you are looking for warren county ohio utilities, please check our official links below: Warren County Engineer's Office # Water & Sewer Department - Warren County Ohio https://www.co.warren.oh.us/water/ Mailing Address. 406 Justice Drive Lebanon, OH 45036 ; Telephone. 513.695.1377 ; Fax. 513.695.2995 ; Email. [email protected] co . warren .oh.us...