Outline of the Revision of Water Supply Devices  
and Water Supply Fac ilities Standards 
 
  
I. Ministerial Ordinance on Standards for Structure and Material of Water Supply 
Devices  
 (Ordinance of the Ministry of He alth, Labour and Welfare No.14 of 1997)  
 
The following is the excerpt of the ordinanc e describing the regulation of standards for 
extraction water from water supply devices. The underlined parts show  the revision of the standards.  
 
 
(Article 2, Paragraph 1)  
The quality of the water supply devices to be  used to provide drinking water shall be 
demonstrated to satisfy standards in the middle and right column of the Appended Table 1 (the 
middle column for endpoint devices and right co lumn for in-line devices regarding the items 
listed in the left column) by the experiment of extraction that is conducted with their samples 
(equipments, parts, or materials (excluding meta ls)) by the order of the Minister of Health, 
Labour and Welfare.   
 
Appended Table 1  (in relation to Article 2 of the ordinance)   
Standards of extraction water from water supply devices  
 (Draft Revision)  
 
     I t e m s  Standards （mg/L or less ） 
Endpoint devices  In-line devices  
Cadmium  0.0003 0.003 
Mercury  0.00005 0.0005 
Selenium  0.001 0.01 
Lead 0.001 0.01 
Arsenic 0.001 0.01 
Chromium  0.005 0.05 
Cyanide 0.001 0.01 
Nitrate nitrogen  
 & nitrite nitrogen     
1.0  
10 
Nitrite nitrogen  non  0.004 non  0.04 
Fluorine  0.08 0.8 
Boron 0.1 1.0 
Carbon tetrachloride  0.0002 0.002 
1,4-Dioxane  0.005 0.05 
1,2-dichloroethane  0.0004 0.004 
Cis-1,2-dichloroethylene  
 & Trans-1,2-dichloroethlene  0.004 0.04 
Dichloromethane  0.002 0.02 
Tetrachloroethylene  0.001 0.01 
Trichloroethylene  0.001 0.01 
Benzene  0.001 0.01 
Formaldehyde  0.008 0.08 
Zinc 0.1 1.0 
Aluminium  0.02 0.2 
Iron 0.03 0.3 
Copper 0.1 1.0 
Sodium 20 200 Manganese  0.005 0.05 
Chlorine ion  20 200 
Evaporation residue  50 500 
Anion surfactants  0.02 0.2 
Nonionic surfactant  0.005 0.02 
 
Phenols 0.0005 as convert  
 it into the amount of phenol  0.005 as convert  
it into the amount of phenol  
Organic substances  
(total organic carbon)   
0.5  
3 
Taste Not abnormal  Not abnormal  
Smell Not abnormal  Not abnormal  
Color 0.5 degrees or less  5 degrees or less  
Turbidity  0.2 degrees or less  2 degrees or less  
Epichlorohydrin  0.01 0.01 
 
Amines 0.01 
as Triethylenetetramine  0.01 
as Triethylenetetramine  
2,4-toluenediamine  0.002 0.002 
2.6-toluenediamine  0.001 0.001 
Vinyl acetate  0.01 0.01 
Styrene 0.002 0.002 
1,2-butadiene  0.001 0.001 
1,3-butadiene  0.001 0.001 
   
Effective Date:  
This revision shall come into effect as from April 1, 2014.  
 
Transitional Measure:  
With regard to water supply devices which actually exist at the time of the enforcement, 
which are to be installed under a commenced consctuction project or which are to be installed to 
buildings under construction and doe s not conform to the standards prescribed in revised Article 
2 Paragraph 1, this provision shall not apply until a major upgrade of the devices.   
II. Ministerial Ordinance on Technica l Standards for Water Supply Facilities  
(Ordinance of the Ministry of He alth, Labour and Welfare No.15 of 2000)  
 
The following is the excerpt of the ordinanc e describing the regulation of standards for 
water supply facilities. The underlined pa rts show the revision of the standards.  
 
(Article 1 )  
   Water supply facilities sha ll satisfy the following requirements:  
(Item 17) The quality of materials and mechanical equipment to be used (hereinafter referred to 
as “materials and equipment”) shall satisfy the following requirements:  
(a) …  
(b) ...  
(c) The quality of the materials and equipment that are exposed to purified water or water in 
purification processes (excludi ng materials and equipment th at contact with water in 
significantly small area, such as pumps and hydrants), is demonstrated to satisfy the 
standards in the right column  of the Appended Table 2 rega rding the items listed in the 
left column of the same table by the experiment  of extraction that is conducted with their 
samples by order of the Minister of Health, Labour and Welfare  
 
Appended Table 2  (in relation to Article 1 of the ordinance)   
Standards of extraction water from materials and equipment of water supply facilities  
 (Draft Revision)  
             I t e m s  Standards （mg/L or less ） 
Cadmium  0.0003 
Mercury  0.00005 
Selenium  0.001 
Lead 0.001 
Arsenic 0.001 
Chromium  0.005 
Cyanide 0.001 
Nitrate nitrogen  
 & nitrite nitrogen     
1.0 
Nitrite nitrogen  non  0.004 
Fluorine  0.08 
Boron 0.1 
Carbon tetrachloride  0.0002 
1,4-Dioxane  0.005 
1,2-dichloroethane  0.0004 
Cis-1,2-dichloroethylene  
 & Trans-1,2-dichloroethylene   
0.004 
Dichloromethane  0.002 
Tetrachloroethylene  0.001 
Trichloroethylene  0.001 
Benzene  0.001 
Formaldehyde  0.008 
Zinc 0.1 
Aluminium  0.02 
Iron 0.03 
Copper 0.1 
Sodium 20 
Manganese  0.005 
Chlorine ion  20 Evaporation residue  50 
Anion surfactants  0.02 
Nonionic surfactant  0.005 
Phenols 0.0005 as convert it into the amount of phenol  
Organic substances  
(total organic carbon)   
0.5 
Taste Not abnormal  
Smell Not abnormal  
Color 0.5 degrees or less  
Turbidity  0.2 degrees or less  
Epichlorohydrin  0.01 
 Amines
 0.01 
as Triethylenetetramine  
2,4-toluenediamine  0.002 
2.6-toluenediamine  0.001 
Vinyl acetate  0.01 
Styrene 0.002 
1,2-butadiene  0.001 
1,3-butadiene  0.001 
N,N-dimethyl aniline  0.01 
 
Effective Date:  
This revision shall come into effect as from April 1, 2014.  
 
Transitional Measure:  
With regard to materials and equipment which actually exist at the time of the 
enforcement and that are exposed to purified wate r or water in purifica tion processes (excluding 
materials and equipment that contact with water in significantly small area, such as pumps and 
hydrants) and does not conform to th e standards prescribed in revi sed Article 1, item17, (c), this 
provision shall not apply until a major upgrade of the facilities.