Abstract
Rain water samples were collected from three cities, Al-Bayda, Shahat and Derna. A study was conducted to evaluate the level of quality of rainwater by tested pH, Electrical Conductivity (EC) , total dissolved solids (TDS), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Turbidity, Fe+2 and pb+2. The results showed that the range of reading for were pH from 6.42 until 7.24, EC from (57.2 -484 ) microsiemens/cm3 ,TDS between 27 and 231 mg/L, COD was 4.09 mg/ L-8.32mg/L and BOD was ranged 1-55 mg/L and 3.24 mg/L. The range of parameter of Turbidity readings were between 6.23-9.84NTU, Fe+2 was ranged 0.030 mg/l and 0.058 mg/L and the pb+2 was from 0.0020mg /L to 0.0057 mg/L. The comparison with Recommended Raw Water Criteria by World Health Organization (WHO) shows that within the permissible limits. Keywords: Rainwater, Heavy metals, Quality, Assessment, Rooftop, Treatment, Aljabil Alakhder.
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