Water Filtration in Nassau County, NY
Whole-Home Water Filtration for Nassau County
Clean, healthy water for every faucet, shower, and appliance in your Nassau County home — backed by a 10-year guarantee.
Serving Nassau County
Professional Water Filtration Across Nassau County
pHountain Water Filters is proud to serve homeowners throughout Nassau County. Our service team operates from our Islip, NY headquarters — close enough to reach any Nassau community quickly, with same-day and next-business-day appointments available.
Whether you’re on the North Shore in Great Neck, the South Shore in Massapequa, or anywhere in between, our certified technicians bring the same family-first standard to every home.
Communities We Serve in Nassau County:
- Great Neck
- Port Washington
- Manhasset
- Roslyn
- Glen Cove
- Sea Cliff
- Oyster Bay
- Locust Valley
- Cold Spring Harbor
- Garden City
- Mineola
- Hicksville
- Westbury
- Uniondale
- East Meadow
- Jericho
- Syosset
- Woodbury
- Plainview
- Hempstead
- Valley Stream
- Freeport
- Rockville Centre
- Massapequa
- Wantagh
- Levittown
- Merrick
- Bellmore
- Long Beach
- Oceanside
- Baldwin
Not sure if we reach your area? Call us — we service all of Nassau County.
Schedule a Nassau County Appointment
384 Moffitt Blvd, Islip, NY 11751
1-631-991-3995- Mon – Fri: 9:00 AM – 5:00 PM
- Saturday: 10:00 AM – 2:00 PM
- Sunday: Closed
Same-day & next-business-day appointments available
Nassau County Has a Known PFAS Problem
State and federal testing has found PFAS (per- and polyfluoroalkyl substances) in multiple Nassau County water systems — including supplies in Massapequa, Valley Stream, and other communities. PFAS are synthetic “forever chemicals” linked to serious health risks at very low concentrations. Many Nassau homeowners don’t know their water is affected until they test.
Find Out What’s in Your Water — FreeWater Quality in Nassau County
Common Water Issues Affecting Nassau County Homes
Nassau County water draws from the Magothy and Lloyd aquifer systems. Here’s what our technicians find most often.
PFAS & PFOA Contamination
Multiple Nassau County water districts have reported PFAS levels above EPA health advisory thresholds. These “forever chemicals” don’t break down naturally and have been linked to cancer, thyroid disease, and immune suppression. Our activated-carbon multi-stage systems are designed to address PFAS removal.
Hard Water & Mineral Buildup
Nassau’s aquifer-sourced water often carries elevated calcium and magnesium, leading to scale on fixtures and appliances, reduced water heater efficiency, dry skin and hair, and streaks on dishes and glass. Whole-home filtration stops scale at the point of entry.
Chlorine & Disinfection Byproducts
Municipal treatment adds chlorine to make water safe for delivery, but it leaves behind a chemical taste and odor — and can form trihalomethanes (THMs) and haloacetic acids when reacting with organic matter. Our systems remove chlorine and its byproducts throughout your home.
Nitrates from Lawn Runoff & Septic
Nassau County’s dense residential landscape means lawn fertilizers and aging septic systems are a significant source of nitrate contamination in the groundwater supply. Elevated nitrates are especially dangerous for infants and pregnant women.
VOCs & Industrial Contaminants
Volatile organic compounds from historical industrial activity, dry-cleaning solvents, and underground storage tanks have been detected in Nassau groundwater. Multi-stage carbon filtration is effective at reducing VOC levels.
Sediment & Aging Pipe Infrastructure
Older distribution lines throughout Nassau can introduce rust particles, sediment, and iron into household water — particularly in homes built before the 1980s. Visible discoloration, staining, and metallic taste are common signs.
Every home’s water is different. A free in-home water test is the only way to know exactly what you’re dealing with.
Why pHountain
Why Nassau County Homeowners Choose pHountain
We’re not a national chain — we’re Long Island neighbors committed to your family’s health.
Family-First Philosophy
Our founder built pHountain to protect his own family. Every recommendation reflects what we’d choose for our own homes — no shortcuts, no upsells.
Local Long Island Expertise
We know Nassau County’s water because it’s our backyard. Our team understands local aquifer challenges, PFAS hotspots, and municipal supply variations across the county.
10-Year Guarantee
Industry-leading confidence in every system we install. If it doesn’t perform, we make it right — that’s our promise to every Nassau County customer.
Certified Installation
Our technicians handle every installation professionally, typically in 2–4 hours. Maintenance-free systems mean no filter changes, no ongoing costs, no hassle.
Our Systems
Filtration Systems Sized for Every Nassau County Home
From a Levittown Cape Cod to a Great Neck estate — we have the right system for your home.
PureFlow Plus
Homes 500 – 2,000 sq ft
- 1,000,000+ gallon capacity
- Family of 5 or fewer
- 10-year guarantee
- Maintenance-free
Hydramax Pro
Homes 1,500 – 4,000 sq ft
- 1,500,000+ gallon capacity
- Family of 4 or more
- 10-year guarantee
- Maintenance-free
Grand Estate
Homes 3,000 – 7,000+ sq ft
- 2,000,000+ gallon capacity
- Family of 5 or more
- 10-year guarantee
- Maintenance-free
Free Assessment
Get Your Free Water Quality Test in Nassau County
The only way to truly know what’s in your water is to test it. Our certified water specialists visit your Nassau County home at no charge and with zero obligation.
Your free water test includes:
- Testing for hardness, pH, TDS, chlorine, and nitrates
- PFAS screening and identification of contaminants of concern
- Assessment of your home’s plumbing and water source type
- A recommended filtration solution matched to your home size
- Transparent, itemized pricing — no hidden fees
No commitment. No pressure. Just honest answers.
Schedule Your Free Nassau County Water Test
We respond within one business day to schedule your appointment.
Common Questions
Frequently Asked Questions — Nassau County
Does pHountain service all of Nassau County?
Yes — we serve all Nassau County communities, including Garden City, Hempstead, Massapequa, Hicksville, Levittown, Freeport, Valley Stream, Long Beach, Great Neck, Oyster Bay, Mineola, Merrick, Bellmore, Wantagh, Rockville Centre, Oceanside, Baldwin, and many more. If you’re unsure, just call us at 1-631-991-3995.
Is PFAS contamination really a problem in Nassau County?
Yes. The New York State Department of Health and EPA testing has confirmed PFAS levels at or above federal advisory limits in a number of Nassau County water systems. Several communities — including Massapequa Park and parts of Valley Stream — have had public notices. A free in-home water test tells you exactly where your water stands today.
What makes pHountain different from other water filter companies?
We were founded by a Long Island family for Long Island families. Every recommendation is guided by what we’d choose for our own homes. We back every installation with a 10-year guarantee, provide professional certified installation, and offer maintenance-free systems — no filter cartridges to replace, no recurring service fees.
How long does installation take?
Most whole-home installations are completed in 2 to 4 hours. Our Nassau County technicians arrive with all equipment and complete the job in a single visit. Same-day and next-business-day scheduling is typically available.
Do your systems work with both well water and municipal water?
Yes. Most Nassau County homes use municipal (town or village) water, but some properties — particularly in North Shore areas — use private wells. Our free water test determines your source and identifies the right system for your specific supply and contaminant profile.
What does the 10-year guarantee cover?
Our 10-year guarantee covers system performance and manufacturing defects. If the system doesn’t perform as specified, we repair or replace it at no charge. It’s our way of standing behind every installation with complete confidence.
Customer Stories
What Nassau County Families Are Saying
“After reading about PFAS in our area, I called pHountain. They came out, tested our water, and showed us exactly what was in it. We had the system installed the same week. Couldn’t be happier with the process.”
“The hard water in our Levittown home was destroying our appliances and leaving residue everywhere. The pHountain system fixed it completely. Our water heater is already running more efficiently and the taste is incredible.”
“Professional from the first phone call to the final installation. The technician explained everything clearly, the installation was fast, and the difference in our water quality was immediate. Highly recommend to any Nassau County family.”
Take the Next Step
Ready for Cleaner Water in Your Nassau County Home?
Book your free, no-obligation in-home water test. Our team serves all of Nassau County with same-day and next-business-day availability.