Hydrogen sulfide is the gas behind the rotten egg smell in well water. Here's how the removal systems work and which one matches your H2S concentration.
Hydrogen sulfide (H2S) removal depends almost entirely on concentration. The right system for 1 PPM is different from the right system for 10 PPM. Know your number before buying anything.
| Under 1 PPM | Catalytic carbon filter — simple, no backwash needed |
| 1–8 PPM | Air injection oxidation — Springwell WF1, Kinetico AIO |
| 8–15 PPM | Peroxide injection + carbon filter |
| Above 15 PPM | Aeration + chemical oxidation — professional system |
For most well water H2S problems (under 8 PPM), air injection oxidation is the right fix. The system maintains an air pocket in the tank. H2S passes through the air, oxidizes, and the sulfur particles are trapped in the media bed and backwashed away during the automatic daily cycle.
The Springwell WF1 handles up to 8 PPM H2S in addition to iron and manganese — making it a single-tank solution for the three most common well water problems.
Springwell WF1 — Removes H2S up to 8 PPM →When H2S exceeds what air injection can handle, hydrogen peroxide injection is the next step. A chemical dosing pump injects a small amount of food-grade hydrogen peroxide into the water line ahead of a carbon filter. The peroxide oxidizes H2S instantly and completely, and the carbon filter removes any peroxide residual.
Not always, but it's worth investigating. H2S often coexists with sulfur-reducing bacteria, iron bacteria, and low dissolved oxygen conditions. If your water also has iron staining, get a full water test rather than testing for H2S alone — a single treatment system (like the WF1) may address multiple issues at once.