What causes lift station odor complaints from neighbors?
Hydrogen sulfide escaping the vent stack, ventilated wet well cover, or pump discharge headers. The fix is source treatment of H₂S, not vent filtration alone.
Why it happens
The 'rotten egg' smell is hydrogen sulfide, a toxic and corrosive gas. It is not the sewage itself, but a byproduct created by specific bacteria that thrive in the oxygen-poor conditions inside a lift station wet well. This gas then escapes through any available opening.
What to check
Inspect the wet well for accumulated sludge, grease, and biofilm on the walls and floats, as these materials feed the bacteria. Check that pumps are cycling properly to prevent waste from sitting stagnant. Confirm that items like rags and so-called 'flushable' wipes are not accumulating and clogging impellers, which worsens conditions.
When to call a professional
Persistent sewer gas odor from a lift station should always be treated as an urgent health and safety issue. Because hydrogen sulfide is toxic and other sewer gases can be explosive, you should contact a professional immediately. Servicing the interior of a wet well is a hazardous, confined-space operation requiring trained personnel and specialized equipment.
How Luften handles it
Luften focuses on source treatment, which is the only permanent fix. We install automated dosing equipment above-deck, without station shutdown, to continuously apply an encapsulating chemistry into the wet well. This chemistry neutralizes hydrogen sulfide before it can become an airborne gas, eliminating the odor at its origin rather than just masking it at the vent. A specialist can perform a site survey to recommend a specific treatment plan.
Hydrogen sulfide (H2S) odor treatment with continuous dosing