The study, based on data taken last year, included more than 8384 miles (13,493 kilometers) of the river, one of the longest waterway in the world and its tributaries.
Yellow River Conservancy Commission in 2007, involved more than 8384 miles (13493 km) of the river, said the 33.8% recorded in the water level of less than five. According to the criteria of the level of UNEP, five inappropriate drinking, aquaculture, industry and even agriculture.
The report says, waste and wastewater is discharged into the system last year amounted to 4.29bn tonnes. Industrial and manufacturing accounted for 70% of discharge into the river with households accounting for 23% and just over 6% from other sources.
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