Health Risk Assessment of Heavy Metal Contamination of Groundwater Around Nnewi Industrial Area, Anambra State, Nigeria

The influence of water quality from boreholes situated around the Nnewi industrial area was evaluated by assessing heavy metal concentrations and health risks associated with human exposure. Water samples were collected 16 different eight industries at a monthly interval May – October 2019 November April 2020 to cover rainy dry seasons, respectively. analyzed for copper (Cu), lead (Pb), iron (Fe), zinc (Zn), chromium (Cr), arsenic (As) using atomic absorption spectrophotometer (AAS). results compared World Health Organization (WHO) standards. Data obtained both seasons indicate Cu had mean value (0.268±0.136 mg/L), Pb (0.014±0.013 Fe (0.119±0.133 Zn (0.572±0.220 Cr (0.051±0.011 As (0.013±0.001 mg/L) All sampled within their various WHO permissible limits except As, Pb. pollution index greater than 1, showing contamination water. Carcinogenic risk assessment via ingestion dermal route above recommended safe limit 1×10-6 which posed cancer risk. show that borehole waters contaminated metals in seasons. It is, therefore, study areas should be treated before being used domestic purposes.