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Table 3 Grading of modified degree of contaminations

From: Monitoring of the changes in potential environmental risk of some heavy metals in water and sediments of Burullus Lake, Egypt

Modified degree of contamination (mDc ) According to [Kremling 1983]
mDC < 1.5 Nil to very low degree of contamination
1.5 < mDC < 2 Low degree of contamination
2 < mDC < 4 Moderate degree of contamination
4 < mDC < 8 High degree of contamination
8 < mdC < 16 Very high degree of contamination
mdC > 32 Ultra high degree of contamination
16 < mDC < 32 Extremely high degree of contamination