Table 1.

Categories for the geocumulation index (I-geo), by Buccolieri et al. (2006), and the concentration factor (Cf)

Value	Classification
Geocumulation index (I-geo)
I-geo ≤ 0	Uncontaminated
0 < I-geo < 1	Uncontaminated to moderately contaminated
1 < I-geo < 2	Moderately contaminated
2 < I-geo < 3	Moderadately to strongly contaminated
3 < I-geo < 4	Strongly contaminated
4 < I-geo < 5	Strongly to extremely contaminated
I-geo ≥ 5	Extremely contaminated
Concentration factor
0 ≤ Cf < 1	Low contamination factor
1 ≤ Cf < 3	Moderate contamination factor
3 ≤ Cf < 6	High contamination factor
6 ≤ Cf	Very high contamination factor