Risk Assessment of Drinking Water Supply System in the Tidal Inundation Area of Semarang – Indonesia

Tidal inundation is a flood that usually occurs in the coastal region. It will impact water quality, which may lead to health problem. A semi-quantitative tool was use to assess water quality in Bandarharjo Village, a tidal inundation affected area. Total coliform was also performed to aseess bacterial contamination. The assessment was conducted at three sites of drinking water supply system: source/provider, distribution, and customer levels. The result showed that both provider and distribution levels have very high risk of contamination, while customer level has a high risk. Water from either source/provider and customer level contained bacterial contamination.