An air-injection system for well water, with no chemicals to add. SpringWell rates it for iron up to 7 ppm, hydrogen sulfide up to 8 ppm and manganese up to 1 ppm.
The catch: No certifier we checked lists it, and it isn’t meant to make unsafe well water safe to drink.
Health information, not medical advice. Guidance differs for infants, pregnancy and existing conditions. Test your own water and speak to a doctor or your local health authority. We may earn a commission when you buy through our links; it never affects our scores.
Our verdict
The SpringWell WS treats the three most common well-water nuisances: iron staining, the rotten-egg smell of hydrogen sulfide, and manganese. Water passes through a pocket of air at the top of the tank, which oxidizes those dissolved minerals into particles, and a greensand media bed catches them. Each night the system backwashes the particles down a drain and refreshes the air pocket. There are no chemicals to buy.
SpringWell rates it for iron up to 7 ppm, hydrogen sulfide up to 8 ppm and manganese up to 1 ppm, at a pH of 6.5 to 10. Those are SpringWell’s ratings: NSF International, WQA and IAPMO R&T don’t list the WS, which is why it scores at our floor for treatment performance. It needs electricity and a drain. And it treats nuisance minerals, not health risks: it isn’t designed for bacteria, nitrate, arsenic or lead, so test your well before you buy and treat those separately. Our NSF certification guide explains how to check a certifier’s listing yourself.
Your well test shows iron, sulfur or manganese within SpringWell’s limits, and you want them gone at every tap without dosing chemicals.
Your well has bacteria, nitrate or arsenic, or levels above SpringWell’s limits, or you have no drain or outlet near the line.
How it scored
Contaminant reduction carries the most weight in the overall score. How we score filters
Treatment performance sits at our 1.5 floor because no certifier lists the WS. How we checked · How we score
What it removes
Nothing below is certified. The limits are SpringWell’s ratings.
| Contaminant | WS | Verification |
|---|---|---|
| Iron | Up to 7 ppm | SpringWell rating, not certified |
| Hydrogen sulfide | Up to 8 ppm | SpringWell rating, not certified |
| Manganese | Up to 1 ppm | SpringWell rating, not certified |
| Bacteria, nitrate, arsenic, lead | No | Not designed for them |
Pros and cons
Strengths
- Treats iron, sulfur and manganese at every tap
- Air injection: no chemicals to buy or dose
- Self-cleaning nightly backwash
- Lifetime warranty and a 6-month money-back guarantee
What to know
- Not listed by NSF International, WQA or IAPMO R&T
- Doesn’t treat bacteria, nitrate, arsenic or lead
- Needs electricity and a drain
- High upfront cost and a main-line install
What owners say
Owners whose water fits the ratings report the stains and smell clearing up. Most complaints are about installation, or water that was outside the ratings.
Often praised
- Orange staining and sulfur smell gone
- No chemicals to manage
- Low upkeep once running
Common complaints
- Install needs power and a drain
- High upfront price
- Weaker results outside the rated levels
Recurring themes across verified buyer reviews.
Specifications
- Models
- WS1 (1 to 4 bathrooms), WS4 (4+ bathrooms)
- Flow rate
- 12 gpm, 20 gpm
- Rated limits
- Iron 7 ppm, H2S 8 ppm, manganese 1 ppm
- pH range
- 6.5 to 10
- Technology
- Air injection, greensand, nightly backwash
- Needs
- Power and a drain line
- Media life
- 10+ years (SpringWell)
- Warranty
- Lifetime against defects; 6-month money-back
Alternatives worth considering
AquaTru Carafe
SpringWell CF1
Common questions
Is the SpringWell WS certified?
Not by any certifier we checked: NSF International, WQA and IAPMO R&T don’t list it. Its iron, hydrogen sulfide and manganese limits are SpringWell’s own ratings.
Does it make well water safe to drink?
No. It treats iron, sulfur and manganese, which are nuisances rather than the main health risks. It isn’t designed for bacteria, nitrate, arsenic or lead. Test your well and treat those separately. See our well water guide.
What if my iron is above 7 ppm?
That’s above SpringWell’s rating, so the WS may not keep up. Check your water test against all three limits and the pH range before you buy.
Does it need electricity?
Yes, for the control head and the nightly backwash, and it needs a drain line for the backwash water.
The bottom line
If a lab test shows iron, sulfur or manganese within SpringWell’s limits, the WS is a chemical-free way to clear them at every tap, on SpringWell’s ratings rather than a certification. It doesn’t make unsafe water safe, so test first and treat bacteria, nitrate or arsenic separately. Start with our well water guide.
- Certifier directories: NSF International, WQA and IAPMO R&T, searched under SpringWell and its parent companies. No listings.
- Maker documents: SpringWell's WS product page and its iron, hydrogen sulfide and manganese ratings.
- Independent lab tests: None published by SpringWell.
Sources
Prices as of October 14, 2026. Product prices and availability are accurate as of the date/time indicated and are subject to change. As an Amazon Associate we earn from qualifying purchases.