PFAS Water Filter NH: What Well Owners Should Know

PFAS contamination has become a major water quality concern for many New Hampshire homeowners, especially families who rely on private wells. People often call these chemicals “forever chemicals” because they do not break down easily in the environment.

For homeowners, the hardest part is knowing what to do next. Should you test your well? Should you install a whole-house filter? Do you need reverse osmosis? Can you qualify for a rebate?

The good news is simple: homeowners have real options. The key is choosing the right system for your water test results, your home’s plumbing, and the way your family uses water.

Why PFAS Matters in New Hampshire

Many New Hampshire homes use private wells. That means the homeowner, not a public water utility, must handle testing and treatment.

PFAS can reach groundwater from industrial sites, firefighting foam, wastewater, landfills, and other sources. Some New Hampshire communities have received more attention because of known contamination, but PFAS does not always stop at town lines or neighborhood boundaries.

That is why testing matters. You cannot see, taste, or smell PFAS in water.

Start With a Certified Water Test

Before you install any filtration system, start with a proper water test through an accredited lab.

A store-bought test kit or guesswork will not give you enough information to make a good decision. A certified test can show:

• Whether PFAS is present
• Which PFAS compounds your well contains
• How high the levels are
• Whether your water also contains iron, manganese, hardness, radon, or other issues
• Which type of treatment system makes the most sense

This matters in New Hampshire because well water often has more than one concern. Iron, manganese, hardness, or radon can affect how well a PFAS filter performs. In some homes, those problems need attention before the PFAS filter can do its job.

Whole-House Filter or Under-Sink Filter?

One of the biggest decisions is whether to treat all the water entering the home or only the water your family uses for drinking and cooking.

Whole-House PFAS Filtration

A whole-house system connects where the water line enters the home. This setup treats water before it reaches sinks, showers, appliances, and fixtures.

For many homes, whole-house PFAS treatment uses granular activated carbon or anion exchange media. Many systems use two tanks, so the second tank provides an added safety barrier after the first tank does most of the work.

A whole-house system may make sense if:

• A certified test confirms PFAS in your well
• You want treated water throughout the home
• Your water chemistry works well with carbon or resin filtration
• The system includes proper bypass valves and service access
• Your home has the right pre-treatment when needed

However, homeowners should not choose a whole-house system blindly. If your water has elevated iron, manganese, hardness, or radon, your installer may need to address those issues first.

Under-Sink Reverse Osmosis

Reverse osmosis, often called RO, usually serves one tap, commonly the kitchen sink. This setup focuses on the water your family drinks and uses for cooking.

RO systems work well for drinking water because they use a membrane to separate contaminants from the water. They can also handle a wide range of PFAS compounds.

An under-sink RO system may make sense if:

• You mainly want protection for drinking and cooking water
• Your water test shows certain PFAS compounds that need strong point-of-use treatment
• A whole-house system does not make sense for your home
• You want a focused solution at the kitchen sink
• You live in a condo, rental, or smaller home

RO systems do create wastewater. However, an under-sink system usually produces much less wastewater than a whole-house RO system.

Why Whole-House Reverse Osmosis Is Usually More Complicated

Some homeowners hear that reverse osmosis works well and assume a whole-house RO system offers the best answer. In most homes, the decision is not that simple.

Whole-house reverse osmosis can create several challenges:

• It can waste a large amount of water
• It may overload a septic system
• It removes minerals from the water
• It can make water more corrosive to plumbing
• It often needs extra treatment before and after the RO system
• It usually costs much more than other residential options

For many New Hampshire homes, a more practical approach may include whole-house carbon or resin filtration plus an under-sink RO system for drinking water.

Do Not Skip Pre-Treatment

PFAS treatment does not start and stop with the PFAS filter. Your overall water chemistry matters.

Iron and manganese can coat filtration media and reduce performance. Hard water can damage RO membranes. Radon can create special concerns with carbon filtration because carbon can collect radon inside the filter media.

That is why a good water treatment plan looks at the full picture, not just one contaminant.

A proper test should check for:

• PFAS
• Iron
• Manganese
• Hardness
• pH
• Radon
• Other common New Hampshire well water concerns

If your test finds these issues, your home may need a water softener, iron filter, radon mitigation system, or another pre-treatment step before the PFAS filter.

New Hampshire PFAS Rebates May Help

New Hampshire has offered a PFAS removal rebate program for eligible private well owners. This program can help offset the cost of qualifying treatment systems or a connection to public water where available.

For homeowners, the most important things to remember are:

• Certified water test results drive eligibility
• DIY test kits do not qualify for rebate documentation
• Paperwork and invoices matter
• Post-treatment testing may be required
• Applications must follow the required timeline
• Homeowners usually remain responsible for ongoing filter maintenance

Because rebate rules and funding details can change, homeowners should confirm current requirements before starting work.

Licensed Installation Matters

PFAS filtration systems connect to your home’s drinking water supply. That makes proper installation important.

A well-installed system should include:

• Correct placement in the plumbing system
• Shutoff valves
• A bypass setup for service
• Proper drain connections with an air gap where needed
• Code-compliant materials
• Access for future filter changes or tank service
• Protection against cross-connections and backflow issues

A licensed New Hampshire plumber can install the system safely, protect your plumbing, and make future maintenance easier.

Questions to Ask Before Installing a PFAS Filter

Before choosing a system, ask these questions:

1. Has an accredited lab tested my well water?
2. Which PFAS compounds did the lab find?
3. Does my water also contain iron, manganese, hardness, pH issues, or radon?
4. Do I need whole-house treatment, drinking water treatment, or both?
5. Will my system need pre-treatment?
6. How often will filters or media need replacement?
7. Could the system qualify for any current New Hampshire rebate programs?
8. Who will handle the plumbing installation?
9. Will I receive documentation for future service and rebate paperwork?
10. How will we confirm the system works after installation?

The Bottom Line for New Hampshire Homeowners

PFAS in well water can feel overwhelming, but the next step is straightforward: test first, then choose the right solution.

Homeowners should not choose a filter based on fear, a sales pitch, or a one-size-fits-all recommendation. The best system depends on your actual water test results, your home’s plumbing, and whether you need whole-house treatment, drinking water treatment, or both.

Al Terry Plumbing & Heating helps New Hampshire homeowners make practical, code-conscious decisions about plumbing and water systems. If you have concerns about PFAS or other well water issues, start with proper testing and work with a qualified professional before changing your home’s water supply.

Concerned about your well water? Contact Al Terry Plumbing & Heating to talk through your next step and make sure your water treatment system gets installed the right way.