Standard No. HJ 1075-2019 "Determination of water quality turbidity turbidity meter method" specifies the method used for the determination of turbidity in surface water, groundwater and seawater. This standard measures the scattering properties of particulate matter in a sample to light by the intensity of scattered light, using NTU (scattering turbidity unit) as the unit of measurement results. The standard specifies in detail the procedures and requirements for sample collection, handling, measurement and data reporting, including assessment methods for measurement limit, calibrate, precision and Precision. In addition, the standard also specifically mentions the precautions for safe operation of laboratories and waste disposal to ensure Reliability of measurement process and comparability of results. The implementation of HJ 1075-2019 aims to ensure scientific and standardized water quality monitoring to meet the needs of environment protection and public health management.