Abstract
Jakarta Bay is located in the north of Jakarta City and is potentially polluted by hazardous chemical substances. Monitoring of water quality in this bay was carried out in March (west monsoon) and August (east monsoon) by the government of Jakarta. This monitor aims toknow the quality of Jakarta Bay and the importance of marine organisms, recreation and port area importance. The water sample is taken by using a watersampler in 19 stations. Water quality parameters collected were temperature, acidity (pH), dissolved oxygen (DO), salinity, transparency, turbidity, phosphate, nitrate and heavy metals mercury (Hg), Lead (Pb), Cadmium (Cd), Copper (Cu), Zinc (Zn), Nickel (Ni), As, and Chromium (Cr), and we compare the data with seawater quality standards stated by Ministry of Environment of Indonesia. We determined the status of water quality using the Storet method. The results showed that, generally, the water quality in this water was insufficient to support the lifeof the marine organisms, recreation, and port area. According to the analysis ofwater quality status, this water was included in the C category (moderately polluted).
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