In this paper presented are results of a study on N pollution in water bodies in Suzhou region,which is located in the center of the Taihu Valley.The present situation of N pollution in the major rivers and lakes as well as in the shallow groundwater in rural areas are evaluated.For diferent water bodies,concentrations of PO₄^3- and different forms of inorganic N,N source in the rivers,lakes and well waters are investigated.Seasonal variation of N polution in the rivers and lakes are compared and countermeasures are brought forward for mitigating N polution in water bodies in this region.