Find useful forms for property assessments, real estate property and deeds, Military Discharge (DD214) requests, and more. Individual water systems. 1.Where public water supply systems, as defined in the Allegheny County Health. ALL that certain parcel or piece of ground situate in the Borough of Oakmont, County of. The Court of Common Pleas of Allegheny County (Fifth Judicial District) consists of the following divisions:. Please click here to search for Historical Deeds, Chattel Mortgage Book and Feme Sol Trader Offices; for the period 1792-1857.