Heavy Metals Pollution denotes any metal component that possesses a relative high density and belongs to aset of metals and metalloids with atomic density more than 4g/cmᶾ. The problem of water pollution by heavy metals is worldwideparticularlyin developing countries. The extensive risk of water pollution isbecause ofmodern technology, civilization and industrialization. The Groundwater, which is an important water supply source, getting contaminated by heavy metals is aworldwideenvironmental problem. It is the majorsource of drinking water in urban and rural areas in Yemen. Groundwater in Lahj Governorate is used exclusively to satisfy the demands of different sectors like drinking, domestic irrigation and industrial purposes. Thus, the contamination of water by heavy metals becomes an issue of remarkable public and scientific concern regarding evidences of their poisonousto human life and biological systems. This study aims to analyse some heavy metals from groundwater in Lahj Governorate of Yemen and its relation to the developed industrial activities, and comparing them with WHO specifications and Yemeni standard. The attempt also been made to evaluate the health damage caused by the higher concentration of heavy metals. Twenty representative groundwater samples were collected from different wells in Lahj Governorate. Thegroundwater samples were analysed using (AAS) Atomic Absorption Spectrophotometer. Themean concentration of Nickel (Ni), Chromium (Cr), and Manganese (Mn) has been measured. The concentration of these heavy metals ranged from 0.0452 to 0.1619 ppm, 0.058 to 0.403 ppm, 0.0127 to 0.1106 ppm respectively.
