Water that smells like rotten eggs due to hydrogen sulfide gas or harmless sulfur-reducing bacteria is generally not harmful or toxic to ingest in low concentrations, though it makes drinking and bathing extremely unpleasant. However, sulfur water can cause skin irritation, dry out hair, and stain plumbing fixtures or laundry. Furthermore, a persistent rotten egg smell across your entire home can sometimes indicate a dangerous natural gas or propane leak rather than water issues. Verification: Test whether the sulfur smell occurs only on hot water taps or throughout the house.
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