Services
Reverse Osmosis Systems in New Hampshire
A reverse osmosis system at the kitchen tap is a lower-cost way to protect drinking and cooking water. A licensed local contractor can test your well and recommend the right setup. Start with a free in-home water test and quote.
What it is and why New Hampshire wells need it
Reverse osmosis is a point-of-use treatment, usually installed under the kitchen sink, that pushes water through a very fine membrane and leaves a broad range of dissolved contaminants behind. For New Hampshire well owners, it is a practical, lower-cost way to protect the water you drink and cook with.
Reverse osmosis removes contaminants including arsenic and uranium, and it is effective enough that NHDES describes it as a standard point-of-use option. It does produce some wastewater, on the order of three to four gallons for every gallon it treats, which is why it is used at a single tap rather than for the whole house.
Many homes pair a reverse osmosis tap with whole-house treatment, letting the larger system handle issues like radon and iron while the reverse osmosis unit polishes drinking water.
How a contractor sets up reverse osmosis
Under-sink installation
A contractor installs the membrane, pre-filters, and a small storage tank under the kitchen sink, with a dedicated faucet for treated water. It is a compact system that does not change the rest of your plumbing.
Pre-oxidation for Arsenic-III
Reverse osmosis removes about 95 percent of Arsenic-V but only about 60 percent of Arsenic-III. When Arsenic-III is present, a contractor adds a pre-oxidation cartridge so the membrane can do its job.
Filter and membrane changes
The pre-filters and membrane are replaced on a schedule to keep the system working. A contractor sets that schedule based on your water and use, and explains it in the quote.
Pairing with whole-house treatment
When a well has whole-home issues like radon or iron, a contractor often combines a whole-house system with a reverse osmosis tap, which is usually the lowest-cost way to protect drinking water.
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 a reverse osmosis system costs in New Hampshire
Because it treats only one tap, a point-of-use reverse osmosis system is a lower-cost option than whole-house treatment, with periodic filter and membrane changes as the main ongoing cost.
The right setup depends on which contaminants are in your water and whether you also need whole-house treatment, so the free in-home test and written quote are the way to a real number for your home.
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
What does a reverse osmosis system remove?
Reverse osmosis removes a broad range of dissolved contaminants, including arsenic and uranium. It is a standard point-of-use option for protecting drinking and cooking water.
Does reverse osmosis waste water?
It produces some wastewater, on the order of three to four gallons for every gallon it treats, which is why it is used at a single tap rather than for the whole house.
Can reverse osmosis treat the whole house?
It is generally used at one tap because of the wastewater and the volume involved. For whole-home issues like radon or iron, a contractor pairs whole-house treatment with a reverse osmosis tap for drinking water.
Does reverse osmosis remove Arsenic-III?
It removes about 95 percent of Arsenic-V but only about 60 percent of Arsenic-III. When Arsenic-III is present, a contractor adds a pre-oxidation cartridge so the membrane removes it effectively.
How often do the filters need changing?
The pre-filters and membrane are replaced on a schedule based on your water and use. The contractor sets that schedule and explains it in the written quote.
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.