in North Jakarta, Indonesia. The method in this research is made by collecting ground water
that is used for daily life in the city of North Jakarta. These research studies were conducted
in residential and office area of North Jakarta to measure tap water and water offices as well
as test the acidity levels (pH), Electrical Conductivity (EC), Total Disolved Solids (TDS).
Measurement results Groundwater in the North Jakarta area is alkaline (pH) above 7 …