Taipei County Government has commissioned structural engineers to carry out a thorough investigation into the incident's causes, including the provincial Department of Environmental Protection's approval of the landfill site and the handling of the contract by the Wuku Administrative District Office. Taipei County chief Su Tseng-chang wants the investigation to include the county government itself, and the Panchiao District Prosecutor's Office has already appointed two prosecutors to the case.
事後，縣府人員已委請結構技師會勘災變原因，至於灰渣場工程是由省環保處核定、五股鄉公所發包管理，台北縣長蘇貞昌認為包括縣政府本身，都應該接受調查，目前板橋地檢署已指派兩位檢察官調查全案。