An unclean environment can cause flooding, especially for people living in watersheds. To realize public awareness about environmental cleanliness to avoid floods, the Government must carry out a Communication Function to increase disaster awareness knowledge to flood-prone communities by maintaining environmental cleanliness.

This study used qualitative research methods. Data collection was carried out using in-depth interviews, participant observation, document studies.  The informant of this research is the Derah Disaster Management Agency (BPBD) Manado City, Head of Prevention and Preparedness, Caamat, Lurah, Community.

The results of the research show that the function of government communication in building watershed community awareness about environmental cleanliness to avoid flooding is (1) Informative function: Provide information both directly through socialization and through the media. Provide information in writing or unwritten. The government created an Early Warning System and SITASYA Application based on information technology. (2) Regulatory Function: Government communication is directed at policy regulations and building public awareness about flood potential, so as to comply with government policy not to litter and live in Pandu relocation. (3) Persuasive Function: Influencing people living on the banks of rivers to be aware of flood disasters, and act quickly and appropriately when a disaster occurs even after a disaster. (4) Integrative Function: Build coordination of tasks of related unit groups such as City Government, BPBD, TNI, POLRI, SAR, Subdistrict, Kelurahan, etc. in an integrated manner to carry out tasks to prevent casualties due to floods.

Keywords : Government Communication Function, Environmental Hygiene, Flood