JOHOR BARU: Several rivers including Sungai Skudai, Sungai Sayong in Kulai, Sungai Tebrau and Sungai Pandan have been found to have high levels of chemical waste.
Skudai assemblyman Dr Boo Cheng Hau said there were high levels of ammonia, phosphorus, nitrate, iron and other substances in the rivers,
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