Hongta District and Tonghai, Huaning, Chengjiang, Jiangchuan County, and 4 County is a part of the Pearl River water system, the catchment area of 5,044 square kilometers.

• 红塔区和通海、华宁、澄江、江川4县及峨山县的一部分属珠江水系，集水面积5044平方公里。