The environmental problems caused by the increase 1-4244-1212-9/07/$25.00

Groundwater wells are the major source of drinking water in Hadhramout-Yemen. The current study assessed the quality of fifty-five water wells data for coastal Hadhramout-Yemen. The samples were tested for physical parameters such as color, Hydrogen ion concentration (pH), electrical conductivity (EC), turbidity (Turb) and total dissolved solids (TDS). This assessment is based on comparing water quality of physical parameter values to the Yemeni standards, calculating the water quality index (WQI) for each well and the correlation coefficients (R) between each pair of the selected physical parameters. The correlation coefficient between (WQI), and the selected physical parameters was also calculated. The percentage of compliance to the Yemeni standards in water samples varies from 71.19 % for TDS to 100% for PH. The WQI reflects that most of the samples (forty-nine) are of good and excellent quality. A good relationship was found (simple linear regression) between the color and the turbidity. The current results show that all physical parameters of drinking water are more or less correlated with each other and the WQI, is a very useful and easy tool for monitoring drinking water.

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