| Summary: | Known as one of big cities in Indonesia, Yogyakarta City requires extensive
groundwater resource since around 70% of whole populations are using shallow
wells, so safe groundwater quality should be considered. The prediction of occurrence
of groundwater pollution hazard is the beneficial key for sustainable groundwater
quality management.
This research has been conducted in term of three main objectives: determination of
groundwater vulnerability, estimation of nitrate and organic chemical contaminant
loading, and assessment of groundwater pollution hazard. Groundwater vulnerability
is assessed by SVV method (Simple Vertical Vulnerability, Putra 2007). Nitrate and
organic chemical contaminant loads are analyzed by stepwise processes (Johasson
and Hirata, 2002
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