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Table 1 The water quality standard for chemical contaminants in dialysis water (ISO13959) and the water quality standard for drinking water (the Water Supply Act in Japan)

From: 2016 update Japanese Society for Dialysis Therapy Standard of fluids for hemodialysis and related therapies

Group Category Maximum allowable levels (mg/L)
Group 1 Contaminants with documented toxicity in hemodialysis Chemical contaminants ISO standard for dialysis water Water quality standard for drinking water in Japan
Aluminum 0.01 0.2
Total chloride 0.1 No std. set
Copper 0.1 1
Fluorine compound 0.2 0.8
Lead 0.005 0.01
Nitrate (as N) 2 10
Sulfate 100 No std. set
Zinc 0.1 1
Group 2 Electrolytes normally included in dialysis fluid Calcium 2 300a
Magnesium 4
Potassium 8 No std. set
Sodium 70 200
Group 3 Trace elements in dialysis water Antimony 0.006 0.02b
Arsenic 0.005 0.01
Barium 0.1 0.7c
Beryllium 0.0004 No std. set
Cadmium 0.001 0.003
Chromium 0.014 0.05
Mercury 0.0002 0.0005
Selenium 0.09 0.01
Silver 0.005 No std. set
Thallium 0.002 No std. set
  1. aSet down as total hardness
  2. bComplementary items
  3. cItems for further study