National Standards for irrigation water quality
This National Standard is formulated in order to implement the Environmental Protection Law of the People's Republic of China, prevent the pollution of soil, groundwater and agricultural products, protect human health, protect ecological environment. This standard specifies the requirements for farmland irrigation water quality, the implementation of the standard, and sampling and monitoring method. This standard is applicable to farmland irrigation water, which uses surface water, groundwater, the treated urban wastewater and similar industrial wastewater as irrigation water sources.