If you own a house, you are responsible for the water line that runs from the utility’s connection point to your home. Your water company owns and maintains the main under the street and the stretch of pipe up to a specific handoff point near the edge of your property, usually the curb stop valve or the meter. Everything past that point is yours: the pipe, the dirt around it, and every dollar it costs to fix when something goes wrong. That split catches a lot of homeowners by surprise, so it is worth knowing exactly where your responsibility starts before a leak forces the question.
Where the Utility’s Pipe Ends and Yours Begins
Every water system has a demarcation point. The EPA defines a service line as the pipe connecting the water main to the interior plumbing in a building and notes that ownership “may be split between the water system and the customer.”1U.S. Environmental Protection Agency. Developing and Maintaining a Service Line Inventory: Small Entity Compliance Guide In practice, the split almost always happens at one of two spots: the curb stop valve (a buried shutoff near the street or property line) or the water meter.
The utility handles the main and typically the pipe running from the main to that curb stop or meter. From there to your house, the underground pipe is your private service line. You own it. You pay for it. The utility will not repair it, and in most places it will not inspect it for you either.
Where the handoff actually falls varies. Some utilities draw the line at the property boundary, others at the meter pit, and a few at the curb stop regardless of where that sits relative to your property line. Your water utility’s service agreement spells this out. If you have never read yours, pull it up before a problem makes you figure it out under pressure.
Shared Service Lines in Older Neighborhoods
In some older neighborhoods, a single service line feeds more than one house before branching off to each property. When the shared section fails, every homeowner connected to it shares responsibility for the repair. Coordinating schedules, splitting the bill, and agreeing on a contractor all require cooperation among neighbors who did not choose this arrangement.
If your home sits on a shared line, get the arrangement in writing. Check your deed and any recorded easements. Where no formal agreement exists, putting one in place with the other connected homeowners can prevent a dispute when a repair becomes necessary.
Easements That Cross Your Yard
A utility easement gives the water company a legal right to access a strip of your property to install, maintain, and repair its infrastructure. These are typically recorded in your deed or on the plat map filed with the local recorder. You still own the land, but your use of that strip is restricted.
The practical restriction matters: you generally cannot build permanent structures over an easement. No sheds, no pools, no retaining walls, and in many cases no large trees whose roots could reach the pipe. If you build something that blocks access, the utility can remove it to reach the line, and you pay for whatever got torn out.
Private easements work the same way. If a neighbor’s water line crosses your land, or several properties share a well, those arrangements should be in a written agreement and recorded with your county. A title search before buying a home should surface any existing easements, but ask about them specifically.
Lead Service Lines Are a Special Case
If your home was built before the mid-1980s, there is a real chance your service line is made of lead. The EPA’s Lead and Copper Rule Improvements, finalized in October 2024, require drinking water systems to identify and replace lead service lines within 10 years, and the rule covers the full line, including the portion on your property that you would normally be responsible for.2US EPA. Lead and Copper Rule Improvements
Water systems had to submit an initial service line inventory by October 16, 2024.3US EPA. Service-Line Inventory and Replacement Requirements Systems serving more than 50,000 people must post the inventory online; smaller systems must make it publicly available another way. You can check whether your line is listed as lead, non-lead, or unknown. If it is unknown, your water system still has to investigate.
Federal funding is backing the mandate. The Infrastructure Investment and Jobs Act directed $15 billion to lead service line replacement through the Drinking Water State Revolving Fund, with 49 percent available as grants or forgivable loans, and additional programs target communities under 10,000 people.4U.S. Environmental Protection Agency. Identifying Funding Sources for Lead Service Line Replacement In many cases, homeowners pay nothing out of pocket when their water system secures replacement funding. Call your utility to find out whether yours has, and where your neighborhood sits in the schedule.
Finding Your Lines Before You Dig
Before any digging project, you need to know where the pipes are. Federal law encourages all states to adopt one-call notification programs, and the designated national number is 811.5Office of the Law Revision Counsel. 49 US Code 6105 – Implementation of Best Practices Guidelines Nearly every state requires you to call at least a few business days before excavating. It is free, and utility locators will mark public lines on your property with color-coded paint or flags.
What 811 does not do is mark your private service line from the meter to the house. For that, check your property survey or the site plan from your closing documents, which often show the pipe’s path. If those are not available, a private utility locating company can trace the line using ground-penetrating radar or electromagnetic equipment. That typically runs a few hundred dollars and prevents the far more expensive mistake of cutting into a water line with a backhoe.
Signs of a Leak and the First Thing to Do
Underground leaks can go unnoticed for weeks. The most common early signal is a water bill that spikes with no change in your usage. Other warning signs: a drop in water pressure, the sound of running water when nothing is on, wet or soft spots in the yard, and mildew or moisture on interior walls near where the service line enters the house.
If you suspect a leak or hit a sudden break, shut the water off. Most homes have a main shutoff valve where the service line enters the building, often in the basement, crawl space, or garage near the water heater. Turn it clockwise. If you cannot find it or it will not budge, the curb stop valve near the street can also shut off service, though you may need a special key or a call to your utility. Find your shutoff valve before you need it, not at 2 a.m. with water pooling in the basement.
Ignoring a leak is not a cost-saving strategy. You pay for every gallon that leaks out, and utilities can shut off your water if you fail to repair a known leak on your private line.
What Repair Costs and Whether Insurance Helps
Your utility will not fix your private service line. You need a licensed plumber, and for exterior water line work most jurisdictions require that plumber to carry liability insurance. Get two or three quotes. Costs for excavating and replacing a residential service line typically run $50 to $250 per linear foot depending on pipe material, depth, soil, and whether the crew uses traditional trenching or a trenchless method like pipe bursting. A typical residential replacement lands somewhere between $1,500 and $5,000, with complex jobs in urban areas or deeper lines running higher.
Most jurisdictions require a plumbing permit from the local building department before the work starts. Your plumber should pull the permit and schedule the inspection afterward. Skipping that step to save time can backfire when you sell the house, since unpermitted work tends to surface in a buyer’s inspection.
Standard homeowners insurance does not cover the cost of repairing or replacing your exterior water service line when it fails from normal wear, corrosion, or root intrusion. The policy may cover interior water damage caused by a sudden failure, but the pipe itself and the excavation to reach it are on you. Many insurers now offer a service line endorsement as an add-on, typically providing $10,000 to $25,000 in coverage per incident for roughly $25 to $75 per year in additional premium. If your service line is older galvanized steel, polybutylene, or lead, the coverage is worth considering, since those materials fail at higher rates.
What Happens If You Let It Slide
A small leak does not stay small. Water erodes soil around the pipe, which accelerates the damage and can undermine your foundation, driveway, or landscaping. You pay for the leaked water the entire time. And your utility can disconnect your service if you fail to address a known leak, leaving you without water until the repair is completed and inspected.
The quieter mistake is not knowing what you own. Homeowners who assume the utility is responsible for everything up to the house get a hard education when a plumber explains that the 40 feet of corroded pipe in their front yard belongs to them. Locating your shutoff valve, confirming where the demarcation point falls on your property, and checking whether your service line is lead or another aging material cost nothing today and can save thousands when something eventually gives out.