Water quality standard of urban miscellaneous water for recycling urban sewage

　　1 scope 　　

　　This standard specifies the water quality standards, sampling and analysis methods of urban miscellaneous water. This standard is applicable to toilet flushing, road cleaning, fire protection, urban greening, vehicle washing and miscellaneous water for construction.　　

　　2 normative reference documents 　　

　　The clauses in the following documents become the clauses of this standard through the reference of this standard. For dated reference documents, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, all parties who reach an agreement according to this standard are encouraged to study whether the latest versions of these documents can be used. The latest version of any document that is not dated is applicable to this standard. GB/T 3181 paint film color standard GB/T 5750 standard test method for drinking water

　　GB/T 7488 determination of five-day biochemical oxygen demand (BOD5) in water quality dilution and inoculation method (neq ISO 5815) GB/T 7489 determination of dissolved oxygen in water quality iodometry (eqv ISO 5813) GB/T 7494 determination of anionic surfactant in water quality methylene blue spectrophotometry (neq ISO 7875-1)
　　GB/T 11898 determination of free chlorine and total chlorine in water quality n, N- diethyl -1, 4- phenylenediamine spectrophotometry (eqv ISO7393-2) GB/T 11913 Determination of dissolved oxygen in water quality Electrochemical probe method (idt ISO 5814) GB/T 12997 Technical specification for design of water quality sampling scheme (idt ISO 5667-1) GB/T 12998 Technical instruction for water quality sampling (neq ISO 5667-2)GB/ T 12999 Technical Specification for Preservation and Management of Water Quality Sampling Samples (neq ISO 5667-3) JGJ 63 Water Standard for Concrete Mixing

　　3 Terms and definitions 　　

　　This standard adopts the following terms and definitions.
　　3.1 Cities are divided into cities and towns.

　　3.2 Urban miscellaneous water is used as non-potable water for toilet flushing, road cleaning, fire fighting, urban greening, vehicle washing and construction.
　　3.2.1 Miscellaneous water for flushing toilets Water for flushing toilets in public and residential toilets.
　　3.2.2 Miscellaneous water for road cleaning Water for road dust suppression and road cleaning.
　　3.2.3 Miscellaneous water for fire fighting Water for municipal and residential fire hydrant systems.
　　3.2.4 Miscellaneous water for urban greening Except for special trees and special flowers, water for parks, roadside trees, road isolation green belts, sports grounds, lawns and similar areas.

　　3.2.5 Miscellaneous water for building construction Water for soil compaction, dust suppression, concrete washing and concrete mixing at the building construction site.

　　4 Water quality indicators The water quality of urban miscellaneous water should comply with the provisions in Table 1. Water for concrete mixing shall also comply with the relevant provisions of JGJ63.

　

Table 1 Water Quality Standard for Urban Miscellaneous Water

　　Note: The water used for concrete mixing shall comply with the relevant provisions of JGJ63.

　　5 Sampling and analysis methods 5.1 Sampling and storage The design and organization of water quality sampling shall be in accordance with GB/T12997 and GB/T12998. The storage of samples shall be in accordance with GB/T12999. 5.2 Analysis method The analysis method is specified in Table 2.　

Table 2 Analysis Method of Standard Water Quality Project of Urban Miscellaneous Water

　

　　5.3 Water quality monitoring

　　The sampling and testing frequency of urban miscellaneous water shall comply with the provisions in Table 3.

Table 3 Sampling frequency of urban miscellaneous water

　　6 Implementation and Supervision of Standards 6.1 The administrative department of sanitary and miscellaneous water of the people’s government at or above the county level and relevant departments are responsible for unified supervision and inspection of the implementation of this standard.
　　6.2 The water quality items and standards of urban miscellaneous water shall conform to the provisions of this standard. Local or industry standards shall not be wider than this standard or conflict with this standard.
　　6.3 The exterior of urban miscellaneous water pipelines, water tanks and other equipment shall be painted with PB09 phthalocyanine blue (see GB/T3181), and the word "miscellaneous water" shall be marked in a prominent position to avoid accidental drinking and misuse.