Risk level

HQ/HI

Adverse Non-carcinogenic Risk

Calculated cases of Cancer Occurrence

Cancer Risk

1

<0.1

Negligible

<1 per 1,000,000 inhabitants

Very low

2

≥0.1 < 1

Low

>1 per 1,000,000 inhabitants

<1 per 100,000 inhabitants

Low

3

≥1 < 4

Medium

>1 per 100,000 inhabitants

<1 per 10,000 inhabitants

Medium

4

≥4

High

>1 per 10,000 inhabitants

<1 per 1000 inhabitants

High

5

>1 per 1000 inhabitants

Very high