Mgeyekwa said that, pollution of the river was mainly caused by illegal alluvia gold mining along the river bank, the process also involves use of water from the river which in reverse contaminates and pollutes the water which goes back to the river and make it unsafe for human consumption.
He revealed that, those human activities on the around the river affects the quality and volume of water at Mabayani dam located about 26 kilometers from Tanga city.
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