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Bulletin of the National Research Centre

Table 5 Classification of pollution load index

From: Effect of urbanization on heavy metal contamination: a study on major townships of Kannur District in Kerala, India

Pollution load index

Pollution level

≤ 1

No metal pollution

> 1

Metal pollution exist

  1. (Vineethkumar et al. 2020; Tholkappian et al. 2018)
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