Research Article
Spatial Variability of Heavy Metals in Soils and Sediments of “La Zacatecana” Lagoon, Mexico
Table 1
Classification of pollution intensity as proposed by Müller [
9].
| | Class | Pollution intensity |
| <0 | 0 | Unpolluted | 0-1 | 1 | Unpolluted to moderately polluted | 1-2 | 2 | Moderately polluted | 2-3 | 3 | Moderately to heavily polluted | 3-4 | 4 | Heavily polluted | 5-6 | 5 | Heavily to extremely polluted | >6 | 6 | Extremely polluted |
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