Jeddah is the most industrialized city on the west coast of Saudi Arabia and is under
increasing influence of human activities. Heavy metals data were obtained from four near-coast
Red Sea sediment cores in close proximity to Jeddah. Chromium, manganese, iron, copper, zinc,
and lead were analyzed from depth-resolved sections of each core via heavy acid digestion and
inductively coupled plasma-mass spectrometry (ICP-MS). The average concentrations of all four
sites were 245.96 mg kg1, 478.45 mg kg1, 8506.13 mg kg1, 251.82 mg kg1, 623.09 mg kg1,
and 362.75 mg kg1, respectively. The depth-resolved results showed that highest concentrations
of Mn, Cu, and Pb were found in the top 15 cm of the core profile distributions compared to other
depth sub-samples. Heavy metal concentrations in core sediments are increased near central
Jeddah and have become higher in recent years. The results of enrichment factor calculations
indicate little anthropogenic supply of Mn and Cr while Pb, Zn, and Cu show strong anthropogenic
input. The Pollution Load Index was higher in the two sites closer to central Jeddah where power
and desalination plants and wastewater release are known. This indicates that the area has suffered
from heavy metal pollution compared to other non-industrialized sites in the Red Sea. Heavy metal
contaminations due to anthropogenic activity should be taken into account to protect the Red Sea
during future growth. The results of this work should be considered as a baseline for heavy metals
monitoring in the sediments of the Red Sea coast near Jeddah, Saudi Arabia.
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