Dealing with Bad Sewer Smell in Laundry Room: Effective Solutions to Eliminate Unpleasant Odors

If you've noticed a bad sewer smell lingering in your laundry room, you're not alone—this is a surprisingly common household concern. The odor can be caused by a range of issues, from clogged drains and dry traps to improper venting or even leaking plumbing connections. To solve the problem, you first need to identify the source of the smell. Start by checking the drain for visible blockages and make sure water is present in every trap (including rarely-used utility sinks, as these can dry out and let gases escape). If the traps are full but the smell persists, inspect washing machine hoses and plumbing joints for leaks. Sometimes, buildup of lint, debris, or soap scum can also cause unpleasant odors. Regularly cleaning out your washing machine’s filters, running a hot water cycle with vinegar, and ensuring ventilation in the room can often remedy the issue.

As an interior designer, I always consider how functional layout influences utility room performance. For laundry rooms, good design isn’t just about aesthetics—it’s about air flow, access to drains, and easy cleaning. When evaluating laundry spaces, I recommend prioritizing practical changes that mitigate future problems. If you’re planning a remodel or want to optimize your space, using a laundry room design planner or similar design solution can help you visualize better drainage setups, appliance placement, and ventilation strategies. Addressing odor issues by thoughtful design makes your laundry room both pleasant and highly functional in the long run.

Tips 1:

Regularly pour a cup of water down floor drains that aren't frequently used—this keeps the trap sealed to prevent sewer gases from entering the room.

FAQ

Q: Why does my laundry room smell like sewage?

A: Common causes include dry or faulty traps, clogged drains, or leaks in the plumbing system allowing sewer gas to escape.

Q: How do I get rid of the sewer smell in my laundry room?

A: Flush all drains, clean washing machine vents, check for plumbing leaks, and ensure proper ventilation; persistent problems may require a plumber’s inspection.

Q: Can mold cause a sewer smell in my laundry room?

A: Mold often causes musty odors, but if combined with sewer smells, it suggests plumbing or drainage issues rather than mold alone.

Q: Does my washing machine need regular cleaning to prevent odors?

A: Yes, clean washer filters and run a monthly hot cycle with vinegar or machine cleaner to reduce odor buildup.

Q: Should ventilation be a priority in laundry room design?

A: Absolutely—good ventilation not only reduces odors but also moisture buildup and related issues, making spaces more functional and pleasant.