Health Risk Assessment and Levels of Heavy Metals in Farmed Nile Tilapia (Oreochromis niloticus) from the Volta Basin of Ghana

Table 1

Parameters for the health risk estimations of heavy metals.

Parameters	Units	Children	Adults
Bodyweight (BW)	kg	15	70
Exposure frequency (EF)	Days/year	365	365
Exposure duration (ED)	Years	6	30
Ingestion rate (IR)	mg/day	200	100
Average time (AT)	Days/year
For carcinogenic		365 × 70	366 × 70
For noncarcinogenic		365 × ED	365 × ED