Under what condition can distilled water be discharged into a potable water tank?

Discharging distilled water into a potable water tank can be acceptable when it has undergone thorough chemical analysis demonstrating that it is safe for consumption. Distilled water is produced by boiling water to create steam and then condensing that steam back into liquid, which effectively removes impurities and most contaminants. However, to ensure it meets hygiene and health standards suitable for potable water, it is critical to perform a chemical analysis to check for any possible contaminants that may have been introduced post-distillation.

This analysis guarantees that the quality of the distilled water aligns with the required standards for safe drinking water. If the water is deemed fit for consumption through this analysis, it can be safely added to the potable water tank. The other options, while they may involve processes relevant to the treatment of water, do not directly ensure that the water meets the necessary health safety standards required for drinking water.