In principle, humans need a healthy environment for their survival. Humans with their tridas can be used for adjustment, mastery and creation. One form of human tridaya that is always carried out is to utilize the natural environment for its interests, especially those related to supportive sanitation so that survival can be better. Manado City is one of the cities in Indonesia which is located in a coastal area with a supportive environmental sanitation in accordance with common expectations in relation to life in general. All its activities and settlements are accompanied by a very rapid development growth because the trend of growth causes population pressure with its socio-economic dynamics. The coastal area of Manado City is considered suitable as a case study in research, where the feasibility level of environmental sanitation needs special attention, especially the condition of the settlement which is in accordance with the expected standards. Specifically, the characteristics of environmental sanitation, which are linked to the growth of squatter settlements, are in fact related to one another because in areas where there are squatters, the environmental sanitation is also irregular. Therefore, it is necessary to get serious attention from both the Manado City government and the community in general, especially the settlers around it. The characteristics of environmental sanitation in illegal settlement areas, especially in Manado Bay (Kelurahan Maasing) and Kali Tondano (Kelurahan Sindulang I), are of varying character, in this case mainly due to factors of different levels of education and income. Due to different levels of education, this causes different perceptions about environmental sanitation. Their assumptions about environmental health do not really matter. Likewise, the income is very minimal, causing no effort to improve the quality of sanitation in the neighborhood.

Keywords : Environmental Sanitation, Growth of Squatter Settlements.