This part specifies the water quality standards, sampling and analysis methods of urban miscellaneous water. This standard is applicable to miscellaneous water for toilet flushing, road cleaning, fire protection, urban greening, vehicle flushing, and building construction.
GB/T 18920-2002 history
2020GB/T 18920-2020 The reuse of urban recycling water—Water quality standard for urban miscellaneous use
2002GB/T 18920-2002 The reuse of urban recycling water--Water quality standard for urban miscellaneous water consumption