The present study was carried out to determination a levels of inorganic compounds contained in the ground water and Reverse Osmosis (RO) water filtration result. The data in groundwater samples was collected from Bekasi, Tangerang and Jakarta in Indonesia. A total of 30 samples were collected and analyzed for the determination of Cadmium (Cd), Chromium (Cr), Manganese (Mn) , Cyanide (CN) and Lead (Pb). The results of the study revealed that in groundwater, the average of Cd 0.0058 mg / l , Mn 1.5233 mg / l , Cr 0.0127 mg/l, Pb 0.0060 mg / l, and CN 0.0040 mg / l. The level of RO result were: Cd 0.0027 mg / l, Mn 0.1767 mg / l , Cr 0.0024 mg / l, Pb 0.0021 mg / l, and CN 0.0023 mg / l . Its mean that Cd and Mn in ground water were higher than the values recommended by PAK-EPA and WHO or the standard of Indonesian Ministry of Health. But after filtration Reverse Osmosis (RO) Mn and Cd levels decreased to levels below the standardized value. By comparing of mean in MANOVA and nonparametric MANOVA in α=5%, there are differences in average levels of inorganic substances Mn, Cr, Cd, Pb, and CN between before and after RO filtration.
Tanty H, Bekti R. D, Herlina T and Nurlelasari. (2014). MANOVA Statistical Analysis of Inorganic Compounds in Groundwater Indonesia. IOSR Journal of Environmental Science, Toxicology and Food Technology , 8 (4), 41-45.