Estimation of pollution indices and hazard evaluation from trace elements concentration in coastal sediments of Kerala, Southwest Coast of India

Bulletin of the National Research Centre

Table 6 Classification of modified degree of contamination

Modified degree of contamination	Contamination status
mC_d < 1.5	Nil to a very low degree of contamination
1.5 ≤ mC_d < 2	Low degree of contamination
2 ≤ mC_d < 4	A moderate degree of contamination
4 ≤ mC_d < 8	A high degree of contamination
8 ≤ mC_d < 16	A very high degree of contamination
16 ≤ mC_d < 32	An extremely high degree of contamination
mC_d ≤ 32	Ultrahigh degree of contamination

Abrahim and Parker (2008), Bramha et al. (2014), Mazurek et al. (2017), Sivakumar et al. (2016)