Variation of Water Quality in Ningxia Section of the Yellow River in Recent 5 Years

The Yellow River is very important for human health and social development in China to require good water quality. This study selected the Ningxia section of as area investigate quality variation 2016–2020. A total 9 parameters were monitored, 8 including pH, dissolved oxygen, biological oxygen demand, chemical phosphate, fluoride, ammonia-nitrogen, permanganate index range Class II standard requirement. Dissolved concentrations ranged from 7.5 9.4 mg/L. However, nitrogen 2018–2020 1.87 2.8 mg/L cause pollution. Both Nemerow method contamination degree showed that with high concentration exerted Principal component analysis also proved this. Stricter environmental management strategies controlling should be taken future. findings provided some useful information pollution River.