Effect of Land Use on Ground Water Quality (A CaseStudy from Ciracas Sub District, East Jakarta, Indonesia)

Abstract

Most of Ciracas society as a rural area had given a complain of worst groundwater that occured metally odour dan yellowish colour. To know the quality of groundwater of that it was conducted the research indicated by the existing of feacal Coliform and concentration of Fe and Mn. There were 5 villages as sites of sampling (Ciracas, Susukan, Kampung Rambutan, Kelapa Dua Wetan, and Cibubur Bekasi) where each locations was differed from the use to rice field, swamp, and garden. Microbial and chemical data were collected at each sites from 15 wells with three replications. Data were analyzed by One Way Anova to compare each locations with different land uses and concentration of Fe and Mn, and microbial data. Pearson’s Correlation method was also used to analyze correlation between septic tank distance and concentration of Coliform and E. coli. The results showed that most of the groundwater surrounding Ciracas sub-district had been contaminted by Coliform and Escherichia coli ranging from 0 to 26.000 MPN/100 ml and 0 to 6790 MPN/100 ml, excluded Susukan village which was used to rice field, and this was significantly different at study sites in each land uses (p<0.05). Nevertheless, well depth and distance of septic tank to well were not significantly correlated with concentration of Coliform and E. coli (p>0.05). Swamp sites indicated high amount of Fe, more than 0,3 ppm and for the used to rice field showed less amount of Mn (< 0,1 ppm). Nevertheless, based on statistical results showed that there was no significant differences in concentration of Fe and Mn in different land uses at study sites (p>0.05) and also no correlation with well depth significantly ((p>0.05). Refer to DHMI No. 907/2002 about drinking water standard, it could be said that most of groundwater in Ciracas sub-district was not able to be used as drinking water. It is needed pre-treatment to drinkable.