Iron and sulfur odor often show up together, since both come from the same anaerobic groundwater conditions. Treating them together with one combo system is almost always cheaper and simpler than two separate units.
Iron bacteria and sulfur-reducing bacteria both thrive in low-oxygen groundwater environments, which is why wells with rust staining frequently also have the rotten-egg smell of hydrogen sulfide. If you're seeing both symptoms, a combo system built for both is the right call rather than treating them separately.
| Stage | What Happens |
|---|---|
| Air injection | Air is injected into the water to oxidize dissolved iron and hydrogen sulfide gas |
| Retention/contact tank | Oxidized contaminants convert to filterable solid particles or odorless compounds |
| Filtration media | Particles are captured by a specialized filter media bed (often manganese greensand or similar) |
| Backwash cycle | System automatically flushes trapped particles on a schedule |
Severity determines sizing. Light iron and sulfur can be handled by smaller units; severe levels (iron over 10 mg/L, strong sulfur odor) may require chemical oxidation instead of air injection alone. Test first to know which category you're in.
Combo systems require periodic backwashing (usually automatic, on a timer or meter), and the media bed typically needs replacement every 5-10 years depending on water quality. Compare this to running two separate systems, each with its own maintenance schedule — the combo approach is simpler to manage long-term.
Yes. Air-injection oxidizing combo filters treat both iron and hydrogen sulfide (rotten egg smell) simultaneously by oxidizing both contaminants, then filtering out the resulting particles. This is more cost-effective than two separate systems.
The system injects air into the water to oxidize dissolved ferrous iron and hydrogen sulfide gas, converting them into solid particles or odorless compounds, which are then captured by a filter media bed.
Typically $800-$1,800 for the unit, plus $200-$400 for professional installation, depending on contaminant severity and household size.
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