由于水源涡河水质污染超标，蒙城县县城从1993年起已全部改用地下水源供水。
The water supply of MengCheng county town had changed to groundwater source because Guo River's water was serious polluted since 1993.
由于水源涡河水质污染超标，蒙城县县城从1993年起已全部改用地下水源供水。
The water supply of MengCheng county town had changed to groundwater source because Guo River's water was serious polluted since 1993.
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