To eliminate sewer gas odors, first identify the source using a professional leak detection service or a carbon monoxide detector (which reacts to sewer gas components). Seal leaks with waterproof sealants or replace damaged pipes. Install mechanical ventilation fans in basements or crawl spaces to exhaust gases. Use enzyme-based odor neutralizers to break down organic matter in pipes. Ensure all plumbing vents are unobstructed and functioning. For severe cases, hire a licensed plumber to inspect and repair the sewer system.

Sewer gas odors stem from methane, hydrogen sulfide, and ammonia emissions from faulty plumbing or blocked vents. Methane, the primary component, poses explosion risks, while hydrogen sulfide causes respiratory distress. The Environmental Protection Agency (EPA) reports that 30% of household odors originate from sewer issues. Ventilation systems reduce gas accumulation by 60-80%, as per ASHRAE guidelines, which emphasize airflow rates of 10-15 cubic feet per minute per 100 square feet. Enzyme treatments effectively neutralize odors by 75% within 24 hours, according to a 2021 study in Journal of Environmental Science and Technology, as they decompose organic waste without harsh chemicals. Professional inspections, however, are critical: 40% of sewer gas leaks go undetected without specialized tools, leading to prolonged exposure, as noted by the American Society of Plumbing Engineers (ASPE). Combining these methods ensures compliance with EPA safety standards and minimizes health risks.