GB/T 11915-1989 is a standard in the field of water quality, focusing on the vocabulary specifications in Parts 3 to 7. It systematically sorts out a large number of water quality-related professional terms, covering water quality analysis, pollution control, water ecology and other aspects. By clarifying the definition of these terms, the industry communication language is unified, and communication barriers caused by vocabulary ambiguity are effectively avoided. Whether it is water quality monitoring workers or professionals engaged in water treatment research, they can accurately express their meanings according to this standard, laying a solid foundation for the efficient development and scientific advancement of water quality-related work.