What to Do When You Have No Water at All

Total loss of water has three possible owners, and naming the right one before you do anything else is what keeps you from paying the wrong professional. The failure sits inside your own plumbing, out at the utility’s main or curb stop, or, if you are on a well, in your own pump and pressure tank. Those are not interchangeable: each points to a different phone number, and a city outage you mistake for a broken pipe can cost you a service call for nothing. So the first move here is not a tool. It is a diagnosis of who owns the problem.

This guide walks the checks in the order that sorts cause fastest, from the thirty-second confirmation to the call you cannot avoid. The goal is not to repair anything. It is to localize the problem to “mine, the utility’s, or the well’s” before anyone gets dispatched. If you are dealing with weak but present pressure rather than a dead tap, that is a different problem covered in our guide on whole-house low water pressure (117). If only the hot side is dead, the issue is your water heater, covered in our guide on why you have no hot water (052).

Dry at Every Tap, or Just One Fixture or the Hot Side?

Before anything else, confirm the loss is truly whole-house, because the fix changes completely depending on the answer. Walk to a fixture on the opposite side of the home from where you first noticed it and open both the hot and cold sides.

Three patterns tell you three different stories. If only one fixture is dead while others run, the problem is that fixture or its shutoff, not your supply, and you can stop reading here and look at that fixture’s cluster instead. If only the hot side is dry everywhere, your incoming cold supply is fine and the trouble is at the water heater, which we cover separately. If both hot and cold are dead at multiple fixtures across the house, you have a genuine whole-house loss, and the rest of this guide is for you.

One more split matters at this stage: is the water gone, or is it just barely trickling? A thin, weak flow everywhere is low pressure, not a total loss, and it usually points to a supply restriction, a failing pressure regulator, or a utility-side drop. A dead tap that gives nothing, not even a hiss after a second or two, is the total loss this guide addresses. Knowing which one you have keeps you from chasing the wrong cause.

The Fastest Culprit: A Main or Meter Valve Bumped Fully Shut

The single most common cause that costs nothing to fix is a main shutoff valve that someone closed and forgot, or that got knocked partly or fully shut. Check this before you call anyone, because it takes under a minute and resolves a surprising share of “no water” panics.

Your home almost always has a main shutoff where the supply line enters, often near the water heater, in a basement or crawl space, in a garage, or in a utility closet. If recent work was done, a contractor, a family member, or your past self may have left it closed. Confirm the valve is fully open: a lever-style ball valve should sit in line with the pipe, and a round wheel-style valve should be turned fully counterclockwise. A valve cracked only partway open can starve the whole house and read like a near-total loss. If you are not sure where your main shutoff is or how to operate it, our guide on how to shut off the water to your whole house (131) covers locating and turning it.

There may be a second valve to check on the house side of the water meter itself, if your meter is accessible to you. What you should not touch is the utility’s side of the meter or the curb stop out near the street. Those belong to the water provider in most systems, and operating them yourself can be against local rules and can damage a valve you are not equipped to fix. If the valve at the curb is the suspected problem, that is a call to the utility, covered further below.

Is It You or the Utility? Checking for an Outage or Planned Shutoff

If your own valves are open and water is still dead, the next question is whether the supply ever reached your house at all. The quickest tell costs nothing: check whether your neighbors have water.

If the houses around you are also dry, the problem is on the utility’s side, and there is nothing inside your home to fix. A water main break, emergency repair, or system failure can cut a whole street or neighborhood at once. Many utilities also schedule planned shutoffs for maintenance and notify customers by mail, door hanger, text, or a notice on their website, so a recent notice you skimmed may be the whole answer. Most water providers run an outage line or a posted service-alert page; checking it tells you whether a known outage is in progress and, often, an estimated restoration time.

If a utility outage is confirmed or suspected, your job shifts from troubleshooting to waiting safely. When regular service has been interrupted by a main break or similar event, local authorities sometimes advise using bottled, boiled, or disinfected water until service is restored and the water is confirmed safe. The U.S. EPA and CDC both describe this: boil or otherwise treat water if a notice is in effect, and follow your health department’s guidance on when tap water is safe to use again. Do not assume the water is fine the instant it comes back; wait for the utility to lift any boil-water notice it issued.

Cold-Weather and Well-System Causes (Frozen Line, Failed Pump)

If your valves are open and your neighbors have water, two situational causes are worth checking next: a frozen supply line in cold weather, and, on a private well, a pump or pressure-tank failure. Both can shut off a whole house while everything around you runs normally.

In freezing weather, a frozen section of supply pipe can block flow to the entire home, especially a line running through an unheated basement, crawl space, garage, attic, or exterior wall. The telltale sign is a sudden total loss during a hard freeze, often after a cold night, with no other explanation. Thawing a frozen line has its own safe and unsafe methods, and the American Red Cross is specific that you keep the affected faucet open and never use an open flame such as a blowtorch. We cover diagnosis and safe thawing in our guides on why pipes freeze and which ones are most at risk (124) and how to thaw frozen pipes safely (126), so use those rather than improvising here.

On a private well, no water at all often means the pump did not deliver, and the usual suspects are electrical: a tripped breaker for the well circuit, a failed pressure switch, a waterlogged or failed pressure tank, or a worn pump. You can safely check whether the well pump’s breaker has tripped and reset it once. Beyond that, stop. Well pumps run on high voltage, and pressure switches, wiring, and submersible pumps are not homeowner repairs. If resetting the breaker does not restore water, or it trips again, that is a call to a licensed well or pump professional. The mechanics of how a well pump and pressure tank work are covered in our guide on what a well pressure tank does (123), and well water that returns dirty or discolored after any service should be tested before you trust it, as EPA private-well guidance advises.

The Unpaid-Bill and Curb-Stop Scenario You Can’t Fix Yourself

Sometimes the supply was shut off on purpose, at the curb, by the utility. This is the scenario you genuinely cannot resolve from inside the house, and recognizing it saves you from paying a plumber for a problem that is not plumbing.

A utility can shut service at the curb stop for nonpayment, and in that case water stops at the property line with everything inside your home in perfect working order. If you suspect a missed or disputed bill, contact your water provider directly; restoring service is an account matter, not a repair. A curb stop can also be left closed after meter work or a service visit, or it can fail mechanically. In every one of these cases the curb stop belongs to the utility in most systems, and operating it is their job, not yours. Forcing a curb-stop valve with the wrong tool can break it and leave you with a larger bill and a longer outage.

The practical rule is simple. If your own main shutoff is open, your neighbors have water, and nothing inside your home explains the loss, the cause is very likely out at the curb or the utility’s main, and the fix starts with a phone call rather than a wrench.

Mine, the Utility’s, or the Well’s: Calling the Right Party

The whole point of the checks above is to land you on the right phone number. Once you know where the failure sits, who to call is clear, and you avoid paying the wrong professional.

Here is how the three ownership zones map to the right call:

What you found	Who owns it	Who to call
One dead fixture, or only the hot side	Your fixture or water heater	No emergency call; see the fixture cluster or our guide on why you have no hot water (052)
Main shutoff or house-side meter valve was closed	You	No call; reopen the valve
Neighbors are also dry, or a posted outage	The utility	Your water provider's outage line
Curb-stop or unpaid-bill shutoff	The utility	Your water provider's customer service
Frozen supply line	You, but route the thaw safely	A licensed plumber if you cannot reach or thaw it
Well pump dead after one breaker reset	Your well system	A licensed well or pump professional

A few situations deserve a call without further DIY. A suspected burst or frozen line you cannot safely reach, a well pump that fails after a single breaker reset, or any sign of water damage from a line that failed all point to a licensed plumber or well professional rather than more self-troubleshooting. For the broader question of how to triage any plumbing emergency in its first minutes, see our guide on plumbing emergency first steps (133). When water does return, run a tap and watch it: if it comes back cloudy, discolored, or under a boil-water notice, treat it as unsafe until your utility or, for wells, a test confirms otherwise.

Frequently Asked Questions

Why did the water in my whole house suddenly stop?
The likeliest causes, in the order worth checking, are a main shutoff valve that got closed, a utility outage or planned shutoff affecting your street, a frozen supply line in cold weather, or, on a well, a pump or pressure problem. Confirming whether your neighbors also have no water quickly separates a problem inside your home from one on the utility’s side.

No one is home with me to help. What is the very first thing to check?
Confirm the loss is whole-house by opening hot and cold at a fixture far from where you noticed the problem, then check that your main shutoff valve is fully open. A valve someone bumped partly or fully closed is the most common no-cost cause and takes under a minute to rule out.

My neighbors have water but I don’t. What does that mean?
It points the problem back to your own property: a closed valve, a frozen line, a well issue if you are on a well, or a curb-stop shutoff specific to your address. If instead the whole street is dry, the cause is on the utility’s side and there is nothing inside your home to fix.

Who do I call when I have no water at all?
It depends on where the failure sits. A confirmed outage or curb-stop shutoff is a call to your water utility. A frozen line you cannot safely thaw is a licensed plumber. A dead well pump after one breaker reset is a licensed well or pump professional. The checks above tell you which zone you are in before you dial.

Is the water safe to use once it comes back on?
Not always. After a main break or an interruption, your utility may issue a boil-water notice, and you should use bottled, boiled, or disinfected water until it is lifted. Water that returns cloudy or discolored, especially from a well, should be treated as unsafe until the notice clears or a test confirms it is fine.

This article is general information, not professional advice; for a suspected frozen or burst line, a failed well pump, or a utility-side shutoff, contact a licensed plumber, a well professional, or your water utility as appropriate, and do not attempt pump, meter, or curb-stop work yourself.

Sources

U.S. EPA: Emergency Disinfection of Drinking Water: https://www.epa.gov/ground-water-and-drinking-water/emergency-disinfection-drinking-water
U.S. EPA: Protect Your Home’s Water (Private Drinking Water Wells): https://www.epa.gov/privatewells/protect-your-homes-water
CDC: How to Make Water Safe in an Emergency: https://www.cdc.gov/water-emergency/about/index.html
American Red Cross: Preventing and Thawing Frozen Pipes: https://www.redcross.org/get-help/how-to-prepare-for-emergencies/types-of-emergencies/winter-storm/frozen-pipes.html