Skip to main content

Table 1 Levels of potential ecological risk for heavy metal in sediments

From: Risk assessment of heavy metals in the surface sediment at the drinking water source of the Xiangjiang River in South China

Range of \( E_{r}^{i} \) valueLevel of single metal ecological riskRange of RI valueLevel of comprehensive potential ecological risk
\( E_{r}^{i} \) < 40LowRI < 150Low
40 ≤ \( E_{r}^{i} \)< 80Moderate150 ≤ RI < 300Moderate
80 ≤ \( E_{r}^{i} \) < 160Considerable300 ≤ RI < 600Considerable
160 ≤ \( E_{r}^{i} \) < 320High600 ≤ RIHigh
320 ≤ \( E_{r}^{i} \)Very high