What Causes a Sulfur Smell in Well Water?

A rotten-egg odor is often associated with hydrogen sulfide, but the source can be the well, plumbing, water heater, or biological activity. The odor may occur in hot water, cold water, or both, and that distinction is useful.

Overview

A rotten-egg odor is often associated with hydrogen sulfide, but the source can be the well, plumbing, water heater, or biological activity. The odor may occur in hot water, cold water, or both, and that distinction is useful.

Start by noting where and when the odor appears. If it is limited to hot water, the water heater deserves attention. If it appears at every cold tap, the well and treatment path may need evaluation. Because gases can change during sampling, work with a knowledgeable laboratory or water professional on appropriate testing.

Treatment options vary with concentration, water chemistry, flow, and whether iron, manganese, or bacteria are also present. Approaches may include oxidation, aeration, catalytic media, disinfection, or correction of a water-heater issue. No single sulfur filter fits every situation.

Asheville Water Specialists can organize the available facts into a complimentary personalized water quality report and recommend next steps without inventing a diagnosis.

Asheville Water Specialists serves homeowners throughout Western North Carolina with water filtration, softening, reverse osmosis, and well-water treatment.