Table 4 Statistical analysis of the single pollution index (Pi) of each heavy metal surpassing the limits.

From: Are heavy metals in urban garden soils linked to vulnerable populations? A case study from Guelph, Canada

Element

Pi

Minimum

Maximum

Average

Pollution degree (average)

Zn

1.023

2.187

1.866

Mild

Pb

1.064

2.157

1.635

Mild

As

2.631

3.951

3.291

Severe

Cda

1.312

1.312

1.312

Mild

Se

1.059

3.106

1.671

Mild

Nemerow Pollution Index

1.196

  1. aOnly one sample exceeded the CCME limits for this element.
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