The Distributional Characteristics of Heavy Metal in Jiangsu Province Shoal Sea

Table 2

Grade standard of 𝐸^𝑖_𝑓 and RI.

Pollution coefficient 𝐸^𝑖𝑟	Pollution index RI	Pollution level
<40	<150	Light ecological risk
40–79	150–299	Middle ecological risk
80–159	300–600	Strong ecological risk
160–320	>600	Very strong ecological risk
>320		Extremely strong ecological risk