Risk level of domestic wastewater pollution in Kolaka regency: Natural break Jenks map model

Background: The clean water obtained by most of the people of Kolaka Regency comes from groundwater which is easily polluted and most of the feces storage facilities owned are plunge type, this type is not impermeable so that it allows soil contamination by feces, it can even reach the water source used. Daily. Likewise, the community-owned wastewater disposal system, in terms of construction, is still at risk of polluting the surrounding environment. Therefore the study aimed to determine the level of risk of household wastewater contaminating the surrounding environment.
Methods: This type of research is a quantitative research with a geographic information system approach. Data was collected by survey method using questionnaires and observation sheets. The sample in this study was 5,400.
Results: On the safety variable of the feces storage tank, 11 sub-districts are included in the very high risk category, namely Iwomendaa, Samaturu, Latambaga, Kolaka Wundulako, Baula Pomalaa, Tanggetada, Polinggona, Watubangga and Toari sub-districts, 1 sub-district is included in the high risk category, namely Wolo sub-district. as well as on the pollution variable due to the contents of the feces storage tank, but there are sub-districts experiencing risk changes in this variable, namely the Wolo sub-district is at very high risk while the Tanggetada sub-district is at high risk. In the variable of pollution due to the wastewater disposal system, the medium risk category is 3 sub-districts namely Wolo, Pomalaa, Polinggona, high risk 6 sub-districts namely Samaturu, Latambaga, Wundulako, Baula, Watubangga and Toari, very high risk 3 sub-districts namely Iwomendaa, Kolaka and Tanggetada sub-districts.
Conclusion: Kolaka District 91.67% of sub-districts have a high risk of pollution due to the safety of the feces collection tank and the contents of the feces collection tank, while the pollution caused by the wastewater disposal system is 50% including the high level of risk.