表 3. Comparison of sensory perception and general chemistry parameters in 7 water quality standards related to direct drinking water.

7项直饮水相关水质标准中感官性状和一般化学指标比较

Parameter	GB 5749-2006	CJ 94-2005	T/WPIA 001-2017	DB 32/ 761-2005	Sanitary Standards for Drinking Water (2001)	Reverse Osmosis Device (2001)	DB 29-104-2010
Color	15	5	5	5	15	5	5
Turbidity/NTU	1, Special conditions (3)	0.5	0.3	0.5	1, special conditions (<5)	1	0.1
Odor and taste	Normal	Normal	Normal	Normal	Normal	Normal	Normal
Visible matter	No	No	No	No	No	No	No
pH	6.5-8.5	6.0-8.5	6.0-8.5	6.5-8.5	6.5-8.5	>5	6.0-8.5
Aluminum/(mg/L)	0.2	0.2	0.05-0.2	0.2	0.2	0.2	0.2
Iron/(mg/L)	0.3	0.2	0.2	0.2	0.3	0.3	0.1
Manganese/(mg/L)	0.1	0.05	0.05	0.05	0.1	0.1	0.02
Copper/(mg/L)	1	1	1	—	1	1	1
Zinc/(mg/L)	1	1	1	—	1	1	1
Chloride/(mg/L)	250	100	100	100	250	250	100
Sulphate/(mg/L)	250	100	100	100	250	250	100
Total dissolved solids/(mg/L)	1000	500	400	400	1000	1000	300
Total hardness/(mg/L)	450	300	200	200	450	450	200
Oxygen consumption/(mg/L)	3, the oxygen consumption of raw water>6 mg/L was 5	2	1.5	1	3, special conditions (<5)	1	1
Volatile phenol class/(mg/L)	0.002	0.002	0.002	—	0.002	0.002	0.002
Anionic synthetic detergent/(mg/L)	0.3	0.2	0.3	—	0.3	0.3	0.1