Heavy metals environmental pollutions are more notable nowadays. One of the main sources of heavy metals in environment is mining and related industries. So in recent years, application of environmental geochemistry increased dramatically, particularly in contamination survey compare with the other environmental subject. Marvil basin is part of Malayer catchment and in hydrogeological division in part of Karkheh catchment basin. Study area covers 28000 m2 and is located between 48º 52‘ to 49º 10‘ east latitude and 34º 13‘ to 34º 00‘ north longitude in western Iran, southeast of Hamedan Province and east of Malayer city. Ahangaran Pb- Zn mine covers about 29.25 km2 and is located in southern hillside of low elevation of Ahangaran in north of Marvil catchment basin. Environmental contamination assessment was carried out by water and soil sampling. Water (wet and dry season) and soil samples were analyzed using an inductively coupled plasma-mass spectrometry (ICP- MS) using a Perkin Elmer model Nekson instrument for heavy metals determinations at Lab West Analytical Laboratory, Australia. Water samples were also analyzed using wet chemistry for determining major cations and anions. Physical and chemical tests were conducted in all soil samples. Obtained results were compared with local and international environmental standards for soil and water resources. Type and amount of contaminations were studied in detail considering their environmental effects. Type of water is bicarbonate with neutral to alkaline pH and its electrical conductivity (EC) is low to medium. Water resources of Marvil catchment basin in both season is suitable for drinking and agriculture use. Comparison of heavy metals in water resources with standard, indicate that it is contaminated with arsenic in dry season which in rural area is more than standard level. Other heavy elements are in safe level without any pollution. Concentration of As increases in dry season due to decline of water table level
