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Jakarta Bay is a crowded area with many activities so that a gathering place for pollutants from the land that is transported through the 13 rivers that flow in Jakarta. The purpose of this research is to explain the process and sources of heavy metal with to compare distribution profile heavy metal in water and sediment in Transitional Season I and Transitional Season II in the Jakarta Bay. The research heavy metal in water and sediment in Jakarta Bay was conducted in September 2014. Analysis of heavy metal in water and sediment use procedure (APHA 2012). The results showed hydro-oceanographic condition in the Jakarta Bay for current velocity range from 0.002-0.028 m/s to wards west and southwest, the wind speed range 4-17 knot blowing to the southwest and tidal tipe of single of riding the tide of 0,84 m. The temperature range 28.9-30.2 °C, salinity range 29.5-30.6 psu, acidity (pH) range 7.80-8.17 and suspended solid (TSS) range 25-68 mg/l. Heavy metals in water for Pb range 0.006-0.016 ppm, Cd range 0.001-0.003 ppm, Cu range from 0.001-0.005 ppm, Ni range 0.001-0.016 ppm and Zn range 0.003-0.097 ppm. Heavy metal in sediment for Pb range 24.86-59.32 ppm, Cd range 0.32-3.49 ppm, Cu range 11.42-67 ppm, Ni range 19.80-39.85 ppm and Zn range 26.14 to 241.01 ppm. Distribution of heavy metal in water and sediment to indicated the sources of heavy metal in the Jakarta Bay largely derived input material from the terrestrial.

This area, which is located near the Banten Bay, is quite active with anthropogenic activities such as industry, fisheries, settlements, and shipyards that have the potential to pollute the environment with heavy metals. This study aims to determine the chemical environmental conditions of the waters and the concentration of heavy metals in the sediments of Banten Bay. Sediment samples were taken at five stations consisting of river and bay sections in April, May, July, August, and September 2019. Heavy metal content in sediments was analyzed according to APHA 2012 using hydrochloric acid and nitric acid destruction methods. The results of heavy metal concentrations in sediments were compared with ANZECC 2000 regulations and sediment quality was determined using the Geo-accumulation Index. The sediment at the observation site is dominated by the silt fraction. The concentration of heavy metals in this study was obtained in the form of lead (Pb) ranging from <0.05 to 6.408 mg / Kg, copper (Cu) ranging from 0.059 to 8.791 mg / Kg, and cadmium (Cd) ranging from 0.042 to 0.605 mg / K. While based on The level of heavy metal contamination in sediments using the Geo-accumulation index (I Geo), the value of all metal types in each month has a value <0.000 at all observation stations. Thus it is concluded that the concentration of heavy metals in the sediment is lower than the threshold determined during the observation. So that the metal concentration weight in the sediment has no significant effect on the environment.