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Table 2 Classification of enrichment factor

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

Enrichment factor Sediment quality
EF < 2 Deficiency to minimal enrichment
2 < EF < 5 Moderate enrichment
5 < EF < 20 Significant enrichment
20 < EF < 40 Very high enrichment
EF > 40 Extremely high enrichment
  1. Barbieri (2016), Abdulqaderismaeel and Kusag (2015), Mei et al. (2011), Salah et al. (2012)