Leak Detection Service Areas on the NH Seacoast

Water Leak Help Across the NH Seacoast

Our service area centers on Portsmouth and extends to nearby New Hampshire towns where callers ask for help. Maine is not part of this service area.

Calls are connected to an independent local plumbing provider. That provider confirms whether it can serve your address, what it can do and when.

The towns with their own pages are:

• Portsmouth, the primary focus, covered on our Portsmouth water leak detection homepage.
• Dover, NH, to the northwest.
• Exeter, NH, to the southwest.
• Rye, NH, along the coast to the south.
• Hampton, NH, farther down the coast.

How Service Coverage Is Confirmed

Coverage is confirmed address by address, not town by town. A town listed here is a place we focus on, not a promise that every street is served.

When you call, the provider checks your location against its working area. It may also consider the type of job, because a buried-line search can need different scheduling than an indoor leak.

If the provider cannot serve your address, you will be told plainly. You can then look for another local plumber.

Portsmouth: Primary Coverage Focus

Portsmouth is where this service is built to help first. Most of our guides use Portsmouth’s own public water information.

The City of Portsmouth describes split ownership of each water service line. The water system owns the line “from the water main to the shutoff valve”, and the owner owns it “from the shutoff valve to their water meter”.

Source: City of Portsmouth — Water Service Line Inventory, reviewed October 2026.

Portsmouth’s water system also serves parts of neighboring towns. The City lists Pease Tradeport, Newington, New Castle, Greenland and portions of Rye and Madbury.

Source: City of Portsmouth — Water System, reviewed October 2026.

Dover: Different Housing and Utility Context

Dover runs its own water system, separate from Portsmouth’s. Its rules about who owns which part of a service line are its own.

Dover says that on city streets it owns the main, curb stop and service line to the property line. In private subdivisions, ownership can depend on the HOA contract.

Source: City of Dover — Water Service Line Inventory, reviewed October 2026.

The Dover leak detection page covers these details and what they mean for a suspected leak.

Exeter: Water-Line and Building Questions

Exeter’s water service is run by the town. Its ownership split uses the curb stop as the boundary.

The Town of Exeter says it owns the line “from the main to the home’s curb stop”. The customer owns the section “from the curb stop to the meter”.

Source: Town of Exeter — Lead Service Line Inventory, reviewed October 2026.

Not every Exeter property is on town water. The Exeter leak detection page explains how a private well changes the questions.

Rye: Coastal Moisture Versus Plumbing Leaks

Rye has more than one possible water provider. Depending on location, water may come from Portsmouth’s system, Aquarion Water Company or the Rye Water District.

Some Rye properties may use private wells instead. Your water bill, or the lack of one, is the quickest way to tell.

Coastal properties also see moisture that has nothing to do with pipes. The Rye leak detection page helps separate outside water from a plumbing leak.

Hampton: Seasonal Property Considerations

Hampton is served by Aquarion Water Company of New Hampshire. Aquarion’s filed rules list the Town of Hampton as served in whole.

Source: Aquarion — NH Rules and Regulations, reviewed October 2026.

Homes that sit empty for part of the year can hide a leak for weeks. The Hampton leak detection page covers freeze and vacancy questions.

Coverage Is Not the Same as Immediate Availability

A town being in the service area does not mean help can arrive right away. Scheduling depends on the provider’s workload, the type of job and the time of day.

We do not promise response times or round-the-clock service. The provider tells you its real availability when you call.

If water is escaping now, shut off the supply first if you can do so safely. That protects the property while you wait for an appointment.

Hidden Indoor Leaks Across the Region

Hidden indoor leaks look much the same in every town. Stains, damp walls and a meter that keeps moving are common clues anywhere.

What differs is the building. A newer home and a much older one can have very different pipe routes and access.

Hidden water leak detection explains how a concealed supply leak is narrowed down before finishes are opened.

Underground Service-Line Leak Questions

Buried line questions are where towns differ most. Each water provider draws the line between public and private pipe in its own way.

Before assuming who is responsible, check your own provider’s rules. Portsmouth, Dover, Exeter and Aquarion each describe the boundary differently.

Underground water line leak detection explains how a buried line is investigated once the boundary is understood.

Leak Repair Versus Detection Requests

Detection and repair are different requests, and it helps to know which you need. Detection finds the source. Repair fixes a source that is already known.

Ask for detection when:

• You see damage but no dripping pipe.
• The meter moves with all water turned off.
• Your bill rose and nothing looks wrong.

Ask for repair when:

• You can see the leaking pipe, valve or fitting.
• A professional has already located the leak.
• A pipe has visibly split after freezing.

Read more about water leak repair once the source is known.

Frozen and Burst Pipe Seasonality

Freeze-related calls rise in the coldest months across the whole region. Pipes in exterior walls, unheated spaces and seasonal homes are often the most exposed.

A frozen pipe may not leak until it thaws. That is why damage sometimes appears days after the cold snap.

For winter emergencies, see frozen and burst pipe repair. For preparation, see the guide to preventing frozen pipes.

Municipal Water Systems Versus Private Wells

Municipal and well properties need different leak checks. A municipal meter test does not apply to a home that pumps its own water.

On public water, a meter that moves with everything off can point to continuous use. On a well, clues are more likely to be a pump that cycles often or pressure that drops.

How to Check Which Service Fits Your Address

A few quick checks tell you which kind of help to ask for. They take less than ten minutes.

What to Know Before Calling From a Nearby Town

Callers from towns near Portsmouth should give their exact address, not just the town name. Coverage can end partway through a town.

Mention your water provider too. It tells the provider which utility rules may apply and who to contact about the public side of the line.

Call (844) 442-1700 — share your address and water provider, and the provider confirms whether it can help.

(844) 442-1700

Emergency Safety Before Traveling Help Arrives

Safety comes before any service call. A few steps can limit damage while you wait.

• Shut off the main water valve if you can reach it safely.
• Stay out of standing water near outlets, appliances or electrical panels.
• Move valuables and electronics away from the wet area.
• If you smell gas, leave right away and call 911 from outside.

For gas, the Portsmouth Fire Department advises leaving immediately, then calling 911. Unitil’s New Hampshire gas emergency line is 1-866-900-4115.

Source: Portsmouth Fire Department — Gas Safety Fact Sheet, reviewed October 2026. This service does not handle gas leaks.

Why Local Utility Ownership Rules Vary

Each water provider writes its own rules, so ownership is never universal. The boundary may be a shutoff valve, a curb stop or the property line.

Rules can change, so confirm with your provider before any digging.

How a Professional Assessment May Differ by Property

The same symptom can lead to different assessments on different properties. The age of the building, its foundation and its water source all matter.

A professional may look at:

• Whether the building has a basement, crawl space or slab.
• Whether the meter is inside, in a pit or at the curb.
• How many plumbing changes the building has seen.
• Whether the property uses public water or a well.

Questions to Ask About Response and Scheduling

Clear questions on the call set realistic expectations. They also help you decide whether to wait or look elsewhere.

How We Handle Unlisted Town Requests

You can still call from a New Hampshire town that does not have its own page. Coverage is checked for your address the same way.

Nearby towns such as Newington, New Castle, Greenland, North Hampton and Stratham are not listed as confirmed. The provider tells you on the call whether it can help.

We do not build town pages for places the provider has not confirmed. Maine addresses are outside this service.

Comparing Common Seacoast Leak Problems

Most calls fall into three groups: indoor leaks, buried line leaks and cold-weather damage. Each needs different information and a different kind of help.

Call (844) 442-1700 — tell us which of these sounds closest, and your request goes to the local provider.

(844) 442-1700