Why is water quality important in dialysis?

• A. Water quality is not important.
• B. Dialysate is made from treated water; contaminants can cause electrolyte disturbances, infection, or hemolysis.
• C. Water quality only affects machine noise.
• D. Water quality only affects taste.

Answer: (B)

Water quality matters because dialysate is made from treated water, and anything left in that water becomes part of the dialysate that interacts with the patient’s blood during dialysis. Contaminants can alter the dialysate’s ionic makeup, leading to dangerous shifts in electrolytes such as potassium, calcium, and bicarbonate. Microbial contamination or endotoxins can trigger infections or fever and cause inflammatory reactions during treatment. Chemical contaminants can damage red blood cells, causing hemolysis, and certain toxins (like aluminum) can have longer-term toxic effects. That’s why the water treatment system and regular testing are essential components of safe dialysis care.