Compare hot and cold
Record whether the odor appears in cold water too, at every fixture, after stagnation or only at one bathroom. This observation helps the provider locate the affected part of the system. It does not identify a contaminant or prove that the source water is safe.
Define the diagnostic visit
Ask who will inspect the heater, plumbing and source as appropriate. A whole-house treatment quote should explain how it addresses the observed location of the problem. Do not alter heater components or chemical treatment without the relevant qualified professional and manufacturer guidance.
Check the same conditions again
After service, compare the same fixtures and conditions that produced the complaint. Keep any laboratory result separate from a smell-based observation. If the concern also appears in untreated cold water, request the source-specific assessment rather than assuming the first repair covered every line.
The raw well and backwash supply
On a Loxahatchee private-well property, keep the well, pump and existing treatment sequence in the same assessment. Photograph each stage in the direction of flow and label any sample point before the equipment. Describe whether the well also supplies irrigation and whether the household notices changes while other water is running. Raw-well testing and available maintenance flow can alter the proposed sequence. A municipal city report or a neighbor’s installation does not specify your well system.