This research work targeted at the use of integrated pollution indices models of Pollution Index (PI), Average of Pollution Index (PI Avg), Pollution Load Index (PLI) and Nemerow Pollution Index (NIPI Nemerow) in assessing heavy metals pollution in soils of three auto mechanic villages of Abuja. Soil samples were randomly collected with a stainless hand auger to a depth range of 0 to 15 cm and were analyzed with atomic absorption spectrophotometer of model Unicam 969 Solar to determine the heavy metal contents in them. Mean concentration (mg/kg) of heavy metals from the results were observed to follow a decreasing order; Apo: Cu (7668) Zn (5360) Cr (1174) Fe (467) Pb (333) Ni (196) Cd (10.5); Kugbo: Zn(1587) Cu (1042) Cr (783) Ni (234) Fe (217) Pb (170) Cd (9.47) and Zuba: Zn(1190) Cr (767) Cu (512) Fe (279) Pb (250) Ni (127) Cd (10.4). Strong positive correlations exist between heavy metals which indicate same source of contamination, mutual dependence and identical behaviors. Results of integrated pollution indices showed that investigated soils have been polluted to various degrees ranging from low to high level pollution. This indicates deterioration of sites quality.

Accumulation of some heavy metals (Cu, Zn, Cd and Cr) was determined in selected fish; Moon fish (Citharinus citharus), Tilapia fish (Oreochronus niloticus), Mud fish (Clarias anguillaris), Cat fish (Clarias gariepinus) and Carp fish (Labeo coulbie) and water samples from Onuimo River in Imo State in Nigeria. Accumulation order of heavy metals in fish samples comprised of Moon fish > Cling fish > Mud fish > Tilapia fish > Cat fish. Bioconcentration factor model used in the present study showed the following order; Moon fish = Carp fish > Cat fish > Mud fish > Tilapia fish and Moon fish = Carp fish > Tilapia >Mud fish > Cat fish for copper and zinc metals respectively. The concentration of cadmium and chromium in water samples were below detection limits of the Atomic Absorption Spectrophotometer (AAS) Machine. Concentrations of Cu, Cd, Zn and Cr were also below permissible limits of some international regulatory bodies.