Pollution Impact Potential Maps - Surface Water Phosphate Environmental Protection Agency

Pollution Impact Potential (PIP) maps were generated separately for nitrate and phosphate to rank critical source areas (CSAs) relative to one another from diffuse agriculture for both the groundwater and surface water receptor. The PIP maps are generated by the EPA Catchment Cha污染影响潜力（Pollution Impact Potential, PIP）图分别针对硝酸盐与磷酸盐生成，旨在针对地下水与地表水两类受体，对农业面源污染的关键源区（critical source areas, CSA）开展相对排序。本次生成的PIP图由美国环境保护署（EPA）的Catchment Cha开发。