Should the water used for car washing follow the above standards?
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Should the water used for car washing follow the above standards? Who can tell me, thank you
Standards for water used in car washing: GB/T18920-2002. Reused wastewater can also be employed.
1. Except in the Beijing area, where the \"Local Standard for Water Use in the Car Washing Industry in Beijing\" is applied. 2. In general areas, the water quality standard for domestic miscellaneous use, CJ/48-1999, is applied. CJ/48-1999 states as follows: 1 General Provisions 1.1 This standard is formulated to unify the water quality requirements for the reuse of treated urban sewage as domestic non-potable water, so as to make use of sewage resources while ensuring the safety and suitability of such water for domestic non-potable uses. 1.2 This standard applies to domestic water used for flushing toilets, urban landscaping, car washing, cleaning, and other similar purposes, as well as to water intended for other uses with similar water quality requirements. 1.3 This standard is to be implemented by relevant entities responsible for urban planning, design, and the operation and management of water supply for miscellaneous domestic uses. The competent authority of the water supply entity for miscellaneous domestic use is responsible for supervising and inspecting the implementation. 1.4 This standard serves as the basis for formulating water quality standards for the reuse of treated municipal wastewater as non-potable water in local areas. Local authorities can use this standard as a foundation to establish their own water quality standards for such reuse, taking into account local conditions. Local standards shall not be more permissive than this standard or conflict with it ； In case of special circumstances requiring a relaxation of these standards, approval from the Ministry of Construction must be obtained. For the project indicators specified in local standards, those local standards shall be applied ； For project indicators not included in the local standards, this standard shall still be applied. 2 Water quality standards and requirements – Standards for domestic miscellaneous water use
Parameter Purpose Limit
Turbidity, NTU 10 5
Soluble solids, mg/L 1200 1000
Suspended solids, mg/L 10 5
Colority, NTU 30 30
Odor No unpleasant smell No unpleasant smell
pH value 6.5–9.0 6.5–9.0
BOD5, mg/L 10 10
CODcr, mg/L 50 50
Ammonia nitrogen (as N), mg/L 20 10
Total hardness (as CaCO3), mg/L 450 450
Chlorides, mg/L 350 300
Anionic synthetic detergents, mg/L 1.0 0.5
Iron, mg/L 0.4 0.4
Manganese, mg/L 0.1 0.1
Free residual chlorine, mg/L Not less than 0.2 at the end of the distribution network
Total coliforms, per L 3 3
2.1 The water quality of domestic miscellaneous water shall not exceed the limits specified in the table above. 2.2 Equipment such as domestic miscellaneous water pipelines and water tanks shall not be directly connected to tap water pipelines and water tanks. The exterior of equipment such as domestic water pipes and water tanks should be marked with light green to prevent accidental ingestion or misuse. 2.3 Water supply agencies for domestic non-potable water should continuously strengthen the management of facilities related to the treatment, collection, supply, metering, and testing of such water. They should establish effective systems and operating procedures for discharge, cleaning, disinfection, and maintenance in order to ensure the quality of the supplied water. 3 Water quality testing 3.1 The methods for testing water quality shall be in accordance with the \"Testing Methods for Standards of Miscellaneous Domestic Water.\" 3.2 Centralized water supply facilities for miscellaneous domestic use must establish a water quality testing laboratory to monitor the quality of the water entering and leaving wastewater reclamation facilities, as well as the quality of water supplied out of these facilities and within the water distribution network. For decentralized or standalone water supply systems, the competent authorities shall assign relevant units to carry out water quality testing, or request a higher-level authority to designate such units. The results of the above water quality tests shall be regularly submitted to the competent authorities for review and archiving. Additional notes: This standard is under the technical management and interpretation responsibility of China South-Central Municipal Engineering Design Institute. This standard was drafted by China South-Central Municipal Engineering Design Institute. Main drafters of this standard: Xu Guangxiang, Zhang Xiaoping, Yang Zhuowei, Wei Guizhen.
Parameter Purpose Limit
Turbidity, NTU 10 5
Soluble solids, mg/L 1200 1000
Suspended solids, mg/L 10 5
Colority, NTU 30 30
Odor No unpleasant smell No unpleasant smell
pH value 6.5–9.0 6.5–9.0
BOD5, mg/L 10 10
CODcr, mg/L 50 50
Ammonia nitrogen (as N), mg/L 20 10
Total hardness (as CaCO3), mg/L 450 450
Chlorides, mg/L 350 300
Anionic synthetic detergents, mg/L 1.0 0.5
Iron, mg/L 0.4 0.4
Manganese, mg/L 0.1 0.1
Free residual chlorine, mg/L Not less than 0.2 at the end of the distribution network
Total coliforms, per L 3 3
2.1 The water quality of domestic miscellaneous water shall not exceed the limits specified in the table above. 2.2 Equipment such as domestic miscellaneous water pipelines and water tanks shall not be directly connected to tap water pipelines and water tanks. The exterior of equipment such as domestic water pipes and water tanks should be marked with light green to prevent accidental ingestion or misuse. 2.3 Water supply agencies for domestic non-potable water should continuously strengthen the management of facilities related to the treatment, collection, supply, metering, and testing of such water. They should establish effective systems and operating procedures for discharge, cleaning, disinfection, and maintenance in order to ensure the quality of the supplied water. 3 Water quality testing 3.1 The methods for testing water quality shall be in accordance with the \"Testing Methods for Standards of Miscellaneous Domestic Water.\" 3.2 Centralized water supply facilities for miscellaneous domestic use must establish a water quality testing laboratory to monitor the quality of the water entering and leaving wastewater reclamation facilities, as well as the quality of water supplied out of these facilities and within the water distribution network. For decentralized or standalone water supply systems, the competent authorities shall assign relevant units to carry out water quality testing, or request a higher-level authority to designate such units. The results of the above water quality tests shall be regularly submitted to the competent authorities for review and archiving. Additional notes: This standard is under the technical management and interpretation responsibility of China South-Central Municipal Engineering Design Institute. This standard was drafted by China South-Central Municipal Engineering Design Institute. Main drafters of this standard: Xu Guangxiang, Zhang Xiaoping, Yang Zhuowei, Wei Guizhen.