Services
Iron and Manganese Treatment in New Hampshire
Iron and manganese cause staining, metallic taste, and buildup, and they are very common in New Hampshire wells. A licensed local contractor can test your well and recommend the right system. Start with a free in-home water test and quote.
What it is and why New Hampshire wells need it
Iron and manganese are among the most common nuisances in New Hampshire well water, found in both shallow and deep wells. They are not the same kind of health concern as arsenic, but they cause the rust and black staining on fixtures and laundry, the metallic taste, and the buildup in plumbing and water heaters that many well owners notice first.
NHDES sets secondary standards of 0.3 milligrams per liter for iron and 0.05 milligrams per liter for manganese, the points at which staining and taste usually appear. Concentrations in New Hampshire groundwater range widely, from barely detectable to several times those levels, so a test tells you what you are dealing with.
Because iron and manganese often occur with arsenic in New Hampshire bedrock, a contractor frequently treats them together with a single, well-sequenced system.
How a contractor treats iron and manganese
Oxidation and filtration
NHDES considers oxidation-filtration the preferred residential approach. The system converts dissolved iron and manganese into solid particles and filters them out, using filter media such as Birm, greensand, MTM, or Filox, without discharging brine to the environment.
Pre-oxidation when needed
Depending on your water, a contractor may add air, chlorine, or a permanganate feed ahead of the filter to oxidize the iron and manganese fully. Air alone is often enough for iron, while manganese usually needs a stronger oxidizer.
Water softening where hardness co-occurs
When iron or manganese comes with high hardness above 150 milligrams per liter, a water softener can address all three. NHDES suggests using non-salt iron and manganese treatment unless you also need to remove hardness.
Sequencing with other treatment
When arsenic or other contaminants are also present, a contractor orders the treatment steps so each works properly, which is one reason iron and manganese removal is often built into a whole-house system.
What to expect
- 1
Request a free in-home water test
Use the form or call. A licensed local contractor sets up a visit at no cost.
- 2
The contractor tests your water and reviews the results
You get a plain explanation of what is in your water and what it means.
- 3
You get a written, itemized recommendation and quote
If treatment makes sense, the recommendation is matched to your water, with the cost in writing.
- 4
The contractor installs the system
If you choose to proceed, the contractor installs and configures the system for your home.
- 5
The contractor confirms performance and explains maintenance
You leave with a clear maintenance schedule and, where relevant, a retest plan.
What iron and manganese treatment costs in New Hampshire
NHDES puts the installation cost of a typical residential whole-house iron and manganese system at roughly $1,500 to $3,000 for a single filtration step, regardless of the specific technology, with additional pre-treatment or post-treatment adding to that.
Your real cost depends on how much iron and manganese you have, whether hardness or arsenic are also present, and the system the contractor recommends after the free in-home test. These figures are 2026 New Hampshire market context drawn from NHDES guidance, not a quote.
Where this fits
Related services a contractor often pairs with this one:
Serving well owners in these and other New Hampshire towns:
Read: A New Hampshire Well Water Contaminants OverviewFrequently Asked Questions
Are iron and manganese in well water harmful?
They are mainly a nuisance, causing staining, metallic taste, and buildup rather than the kind of health risk arsenic carries. NHDES sets secondary standards of 0.3 milligrams per liter for iron and 0.05 milligrams per liter for manganese, the levels where problems usually start.
Why does my water leave rust or black stains?
Iron tends to leave rust-colored stains and manganese leaves black or dark stains on fixtures, laundry, and inside plumbing. A test confirms which one, and usually it is some of both.
Is oxidation-filtration better than a water softener?
NHDES considers oxidation-filtration the preferred approach for iron and manganese and suggests using non-salt treatment unless you also need to remove hardness. A softener can make sense when high hardness occurs along with iron and manganese.
Will treatment fix the metallic taste and smell?
Removing iron and manganese addresses the metallic taste and the staining they cause. If a separate odor is present, the contractor identifies its source during testing and recommends the right step.
How much maintenance does the system need?
Oxidation-filtration systems are backwashed regularly and the media is serviced on a schedule the contractor explains in the quote. Any oxidizer feed is refilled periodically.
Start with a free in-home water test
A licensed local contractor will test your water, explain the results, and give you a written quote. No obligation.