Table 2.

Geo-accumulation index (I_geo) based on average heavy metal concentrations measured at five nesting beaches on the Saudi Arabian Red Sea coast. Upwind, Factory, Downwind 1, and Downwind 2 located in close proximity to a cement factory near Yanbu, and Rabigh Beach is a reference site 200 km south of Yanbu. Values were categorized in different levels of contamination from Muller (1969). Values in green are classified as uncontaminated, values in yellow are uncontaminated to moderately contaminated, and values in red are moderately contaminated