White spots and scale
Chalky film on glasses, spotted dishes out of the dishwasher, and crust building up on faucets and shower heads.
Rhode Island & Eastern Connecticut
Better water, from the well or the water main.
Whole-home filtration, water softening, private well systems, and reverse osmosis drinking water — professionally installed across Southern Rhode Island and Eastern Connecticut, with standard installation included in your package price.
- City water & private wells
- Free standard installation
- Lifetime warranty on qualifying parts
- Locally owned and operated
What we install
- Whole-home softening & filtration
- Private well treatment
- Reverse osmosis drinking water
- Specialty treatment by condition
Free installation included
Free installation, included in every system package.
Standard installation labor is built into your package price instead of showing up as a separate line item. Every qualifying system also carries a lifetime warranty on dry parts, five years on the control valve, circuit board and filtration media, and one year on installation labor.
Get a Free Water Consultation
Call (401) 343-7759
Non-standard plumbing, electrical, drainage or permit work is identified and priced before any work begins.
Common water complaints
You already know when something’s off with your water.
Most homeowners notice it long before they do anything about it — on the glassware, in the shower, or the first sip from the tap.
Dry skin and hair
Skin that feels tight after a shower, hair that never quite rinses clean, and soap that refuses to lather.
Rust and orange staining
Orange or brown marks in sinks, tubs and toilet tanks — and laundry that comes out tinted instead of clean.
Rotten egg smell
A sulfur odor that shows up when you run the hot water, or hangs around a particular fixture in the house.
Chlorine taste or smell
That pool-water note in a glass from the kitchen sink, in coffee, and in anything you cook with tap water.
Drinking water concerns
You’d rather not think twice about the water your family drinks — or keep buying cases of bottled water.
Two very different starting points
City water and well water are not the same problem.
Where your water comes from changes what shows up at the tap — and what it takes to fix it.
City / Municipal Water
Treated before it reaches you — and it shows.
Municipal water arrives disinfected and consistent, which is good. What homeowners tend to notice instead is hardness, scale on fixtures and appliances, and the taste and smell that come with chlorination.
- Hardness
- Chlorine
- Scale buildup
- Taste & odor
Typical direction: whole-home softening paired with filtration, plus reverse osmosis at the kitchen sink for drinking and cooking.
Get a Free Water Consultation
Private Well
Untreated, and different at every address.
Well water comes straight out of the ground with whatever the ground gives it. Two houses on the same road can need completely different equipment, which is why well systems are built around the well — not around a catalog.
- Iron
- Rust staining
- Sulfur odor
- Manganese
- Hardness
Typical direction: treatment is selected based on the water conditions in the home, which is why we look at the well before recommending anything.
Talk about your wellEvery recommendation we make is based on the water conditions in that specific home. We don’t quote equipment before we understand what the water is doing.
Private well water
What well owners around here actually run into.
Four issues account for most of the well calls we get across South County and Eastern Connecticut. They usually show up in combination rather than alone, and how much of each you have is what decides the equipment.
Iron and rust staining
Orange or reddish-brown marks in sinks, tubs and toilet tanks, stains that come back after every cleaning, and laundry that comes out tinted. Often a metallic edge to the taste.
Sulfur / rotten egg odor
The rotten-egg smell that shows up when you run the water — frequently stronger on the hot side, and sometimes only at one fixture in the house.
Manganese
Darker staining than iron — black to brownish-gray in fixtures and dishwashers, dark specks in the water, and a gray cast on white laundry.
Hardness
Scale on fixtures and inside the water heater, soap and detergent that won’t lather, spotted glassware, and appliances that wear out earlier than they should.
How a well system actually gets put together
Your well, not a category
Two houses on the same road can need different equipment. Treatment is selected based on the water conditions in the home.
Order matters
Well systems are usually staged. What gets addressed first changes what the equipment behind it has to handle.
Sized to the household
Flow rate, number of bathrooms and how much water you actually use all factor into how the system gets sized.
Explained before it’s installed
You’ll know which stage does what and why it’s there before anything gets put in.
Water systems
Systems matched to the problem, not the price sheet.
Four core systems cover most Southern New England homes, with add-ons for the cases that need them. Which one fits yours depends on your water source and what you’re noticing.
Whole-Home Softener + Filtration
The standard city-water setup: a high-capacity softener paired with granular activated coconut shell carbon, installed where water enters the house. Handles hardness and scale along with common municipal taste and odor issues.
- Softening capacity
- 48,000 grains
- Valve flow rate
- 30 GPM
- System flow rate
- 27 GPM
- Resin volume
- 1.5 cu ft
- Media tank
- 10" × 54"
- Brine tank
- 15" × 35"
- Bypass size
- 1"
Control valve with ceramic discs and 72-hour memory backup, USA-made 10% crosslinked softening resin, coconut shell carbon and polishing gravel. XL version for homes with 8+ residents or 4+ bathrooms: 64,000 grains, 12" × 52" media tank, 28 GPM.
Private Well System
A dual-tank system built for untreated well water. An air-injection control valve oxidizes iron, sulfur and manganese at the valve without added chemicals, followed by Katalox Light media, catalytic carbon and softening.
- Configuration
- Dual tank
- Treatment
- Air injection (AIO)
- Primary media
- Katalox Light
- Carbon
- Catalytic coconut shell
- Softening
- 10% crosslinked resin
Katalox Light is a backwashing media that traps fine sediment and raises pH. Which stages your well needs, and in what order, depends on the water conditions at your address.
Reverse Osmosis Drinking Water
A tankless, seven-stage under-sink system on its own dedicated faucet, for the water you drink and cook with. Sediment pre-filter, double carbon block, RO membrane, in-line carbon, alkaline remineralizer and a final carbon polish.
- Stages
- 7
- Membrane
- 800 GPD thin-film composite
- Rejection rate
- 95–99%
- Filtration
- 0.0001 micron
- Drain ratio
- 2:1 low drain
- Design
- Tankless
Tankless takes up to 70% less cabinet space than a tank system. A tank version is also available: 5 stages, 100 GPD membrane, with a steel storage tank and food-grade butyl bladder.
Iron & Sulfur Removal System
For wells where staining and rotten-egg odor are the main event. A hydrogen peroxide injection panel at the point of entry oxidizes iron and sulfur, catalytic carbon captures them during backwash, and a softening tank handles hardness.
- Configuration
- Dual tank + injection panel
- Treatment
- Hydrogen peroxide injection
- Softening capacity
- 48,000 grains
- Valve flow rate
- 30 GPM
- System flow rate
- 27 GPM
- Media tank
- 10" × 54"
Includes the peroxide holding tank that feeds the injection panel. Sizing and peroxide feed rate are set from the water conditions in the home.
Also available, depending on what your water needs
Salt-Free Conditioner
Prevents scale from forming without removing minerals. No salt, no brine tank, no drain, no electricity.
City or well water
Carbon-Only Filter
Whole-home granular activated coconut shell carbon on its own, for city water that needs taste and odor handled but not softening.
No salt · no wastewater discharge
UV Purifier
A stainless steel reactor that treats water with ultraviolet light as it passes through — no chemicals, no change to taste or odor.
12 gal · 37.2" × 2.5" × 2.5" · spare bulb included
Pre-System Sediment Filter
First line of defense at the main water entry, catching sand, silt and rust before they reach the rest of the system.
20" × 4.5" · 15 GPM · 10,000 gal filter life
Dual-Tank City Water System
Softening and carbon in separate tanks rather than one, with a carbon tank that self-cleans on backwash.
48,000 grains · 30 GPM valve
RO Storage Tank
Steel shell with a food-grade butyl bladder, for tank-style reverse osmosis setups that store pressurized water under the sink.
Pairs with the tank RO systemSpecifications above are the manufacturer’s. Which system and which stages fit your home depends on the water conditions there — that’s what the consultation is for.
Included with every installation
Free standard installation
Standard installation labor is included in your package price, not billed separately. Non-standard plumbing, electrical, drainage or permit work is priced before it’s done.
Lifetime warranty — dry parts
Qualifying mechanical and non-consumable components that don’t come into direct contact with water are covered for as long as you own the system.
5 years — valve, board & media
The control valve, circuit board and filtration media are covered against defects in materials and workmanship for five years from the original purchase date.
1 year — installation labor
Labor-related issues arising from the original Harborline installation are covered for one year from the install date.
How it works
Four steps, and no surprises in the middle.
The process is deliberately short. You should know what problem you have, what fixes it, and what it costs before anyone touches your plumbing.
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STEP 01
Tell us what’s going on
Staining, smell, scale, taste, or just a general feeling that the water isn’t right. Call, text, or send the form — whatever’s easiest.
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STEP 02
We assess your water and home
We look at your water source, the conditions in the home, your plumbing, and how much water your household actually uses.
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STEP 03
We recommend the right system
You get a clear explanation of the problem, the system that addresses it, and the price — in plain language, before any work begins.
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STEP 04
Professional installation
We install the system — standard installation labor is in your package price — walk you through how it runs, and leave you with your warranty coverage in writing.
Free water consultation
Let’s figure out what’s going on with your water.
Tell us what you’re noticing and where you are. We’ll follow up to learn more about your water and walk you through what makes sense next. Six fields, no questionnaire — and if it’s easier to text us a photo of the staining, do that instead.
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No pressureNo high-pressure sales pitch — we’ll explain what we recommend, what it costs, and let you make the call.
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Your information is not soldWe use it to contact you about your water. That’s it.
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Clear pricing before any workYou’ll know the number before we schedule anything.
Why Harborline
A straightforward way to buy water treatment.
Water treatment has a reputation for long pitches and vague pricing. We built this company to run the other way.
Local Southern New England service
We work in Rhode Island and Eastern Connecticut. You’re not calling a national call center.
Straightforward pricing
You get the number before the work, not after — with standard installation already in it rather than added at the end.
Systems matched to the actual problem
Equipment is selected around the water conditions in your home, not around what we’d like to sell.
Backed by a real warranty
Lifetime on qualifying dry parts, five years on the valve, board and media, one year on install labor. The terms are published.
Responsive communication
Calls and texts get answered. You’ll know who to reach and when to expect us.
No high-pressure sales process
No four-hour demonstration at your kitchen table. We explain the options and let you decide.
About Harborline
Built around a simple idea.
Harborline Water Co. was started on the belief that water treatment should be straightforward. A homeowner should understand what problem they have, what system is being recommended and why, what it costs, and who is going to install it.
That’s not how this industry usually works. Too much of it runs on long in-home presentations, pricing that only appears at the end, and equipment chosen before anyone looks at the water. We’re a local company in Southern New England doing it the plain way instead.
“Tell people what’s actually wrong with their water, recommend the thing that fixes it, and charge a fair price to install it properly.”
Service area
Serving Southern Rhode Island and Eastern Connecticut.
Two states, one tight footprint — close enough that we can actually get back to you when you need us.
Southern Rhode Island
Our home base. South County and the bay towns, where municipal supply and private wells sit on the same road as each other.
Washington County — South County
- Westerly
- Charlestown
- Richmond
- Hopkinton
- Exeter
- South Kingstown
- Narragansett
- North Kingstown
Kent County
- Coventry
- East Greenwich
Eastern Connecticut
Just over the line, where private wells are common and water conditions can change from one street to the next.
New London County
- Stonington
- North Stonington
- Mystic
- Groton
- Ledyard
- Preston
- Griswold
- Voluntown
- Norwich
- Waterford
- East Lyme
- Montville
- Colchester
- Salem
Windham County
- Plainfield
- Killingly
- Brooklyn
- Sterling
We also cover the Providence-area suburbs and the rest of the Narragansett Bay communities, and the service area is expanding across Southern New England. If your town isn’t on this list, reach out anyway — we’ll tell you straight whether we can get to you. See every town we serve →
Questions
Frequently asked questions.
Do you work with city water and private wells?
Both. They’re different problems with different equipment, and we handle each on its own terms. City-water homes usually come to us about hardness, scale, and chlorine taste or smell. Well homes usually come to us about iron, staining, and sulfur odor.
How do I know what type of system I need?
You don’t need to know — that’s our job. We assess your water source, the conditions in the home, your plumbing, and your household’s water use, then recommend what fits from the four core systems and the add-ons. Treatment is selected based on the water conditions in the home, so we don’t quote equipment before we understand what’s actually happening.
Do you offer reverse osmosis?
Yes. Reverse osmosis is an under-sink system for the water you drink and cook with, delivered through its own dedicated faucet. Plenty of homeowners pair it with whole-home treatment — the whole-home system handles the house, the RO handles the kitchen.
What does the warranty cover?
Three tiers. Qualifying dry parts — the mechanical, non-consumable components that don’t touch water — carry a lifetime warranty for as long as you own the system. The control valve, circuit board and filtration media are covered for five years from purchase. Installation labor is covered for one year from the install date. Several components also carry manufacturer-backed coverage on top of that.
Conditions, exclusions and how to make a claim are all on the Warranty page — worth two minutes before you buy anything from anyone.
Is installation really free?
Standard installation labor is included in the package price rather than charged separately. What that doesn’t cover is non-standard work — plumbing modifications, electrical, drainage, structural work, permits or repairs outside the standard install scope. If your home needs any of that, we identify it and price it before the work happens, not after.
Do you install the equipment?
Yes, and standard installation labor is included in your package price rather than billed as a separate line item. You’re not being handed a box and a phone number for a plumber, and you’re not coordinating between two companies if something needs attention later. Installation labor is covered for one year from the install date — the full warranty terms are published.
How long does installation usually take?
It depends on the system and your home’s plumbing. A straightforward whole-home installation is typically completed in a single visit; well systems with multiple stages can take longer. We’ll give you a realistic time estimate when we give you the price, not after.
Do you offer financing?
Financing options are being finalized. Ask us during your consultation and we’ll tell you exactly what’s available at that time — we’d rather say nothing than promise terms we haven’t confirmed.
What areas do you serve?
Southern Rhode Island — Westerly, Charlestown, Richmond, Hopkinton, Exeter, South Kingstown, Narragansett, North Kingstown, Coventry and East Greenwich — plus the Providence-area suburbs. In Eastern Connecticut we cover Stonington, North Stonington, Mystic, Groton, Ledyard, Preston, Griswold, Voluntown, Norwich, Waterford, East Lyme, Montville, Colchester, Salem, Plainfield, Killingly, Brooklyn and Sterling. The service area is expanding across Southern New England, so it’s worth asking if you’re just outside it.
How much does a whole-home system cost?
Pricing depends on the water issue, system type, household size, and installation requirements. Standard installation labor is included in the package price rather than added at the end. We provide clear pricing before any work begins.
Reviews
What homeowners say.
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Ready for better water?
Tell us what you’re dealing with. We’ll look at your water, explain what’s going on, and give you a straight recommendation and a real price.