Well Running Dry: Signs, Causes, and What to Do

What are the signs your well is running dry?

• The pump sounds like it is sucking air, and faucets sputter. University of Minnesota Extension (reviewed 2021) lists both as signs of a low water level.
• Cloudy or muddy water, or sand in the toilet tank, as the pump pulls from near the bottom.
• Pressure that is fine for ten minutes, then fades during a long shower, laundry, or watering, and comes back after the well rests.
• The pump runs longer than it used to, which shows up on the electric bill.
• It happens in late summer or fall, or during a drought, and gets better with spring rain.

One sign in the list is worth separating out. If the water comes back after a rest, the well is short on water, at least for now. If it never comes back, or the breaker trips, the cause is more likely the pump or the wiring, and our well pump guide walks through those checks.

Why do wells run dry?

Drought and the season. Penn State Extension (updated June 2, 2025) says groundwater in Pennsylvania is usually highest in March and April, starts falling in May, and is lowest in late September or October. Shallow wells near the water table go dry first. NEIWPCC (April 2026) reports that about 200 dry wells were reported in New Hampshire in fall 2025, two thirds of them dug wells, and that more than 75 percent of monitored wells were still below normal into mid-March 2026.

The pump is set too high. Nebraska Extension (NebGuide G2153, 2012) says a dry year can drop the water level until the pump is no longer under water, and a pump set too high gives little or no water at the faucets. The well may still hold plenty of water below the pump.

Neighbors and big users. Wellowner.org, from the National Ground Water Association, says larger nearby pumpers can lower the groundwater level around your well. Minnesota Extension notes that a cone of depression from heavy pumping usually eases once use drops.

A clogged well. Penn State Extension (updated May 29, 2025) lists mineral scale, slime from iron bacteria, and fine sediment as the causes of falling yield, and says iron bacteria can clog a screen within months. A yield drop of 25 percent or more, it says, means the well needs rehabilitation.

Equipment that looks like a dry well. Penn State says the most frequent cause of lost water is a worn-out or failing submersible pump, ahead of electrical faults, a tank that needs replacing, and clogging. A leak in the drop pipe or the line to the house can also make a full well act empty.

How do I tell drought from a pump problem?

Wellowner.org suggests four questions. Is the drought worse than usual? Did this happen in past droughts? Are the neighbors' wells affected too? Has the taste or smell of the water changed? Yes answers point at the water level. PrivateWellClass (February 2026), an EPA-funded program run by RCAP and the University of Illinois, adds: keep a record of the water level and the pump depth, and ask neighbors whether this happens every summer. A contractor settles it with a water level meter, which Penn State says costs $300 or more, so most owners let the pro bring one.

What to do when your well runs dry, today

1. Stop outdoor use: lawn watering, car washing, pressure washing, and pool filling. NEIWPCC lists all of these.
2. Fix leaks, starting with running toilets.
3. Spread out laundry, showers, and the dishwasher so the well recovers between uses.
4. Protect the pump. If it runs and no water comes, turn it off at the breaker. A pump that runs dry loses the water that cools it.
5. If you need water in the meantime, PrivateWellClass suggests a potable tank filled by a water hauler, and disinfecting every pipe and part you connect to the house.
6. Call a well contractor to measure the water level.

How much water should a well produce?

What matters is the peak, not the day. Penn State Extension (updated September 8, 2025) says a system should meet peak demand for at least two hours, and a family of four can use over 300 gallons in a two-hour peak. A 1 gallon per minute well makes 1,440 gallons a day, but only 120 gallons in that window. A pressure tank gives only about 20 percent of its size as usable water, so a 42-gallon tank gives about 8 gallons. That is why a slow well can still serve a house once it has storage.

How a well pro fixes a dry or low-yield well

Most fixes start with the pro measuring the static water level, the pumping level, and the pump depth, as NebGuide G2153 describes. Then, from cheapest to most costly:

• Lower the pump. Penn State calls this usually a short-term fix, because it only reaches water that is already in the well.
• Add storage. A non-pressurized tank and a booster pump let a slow well fill the tank all day. Penn State sizes it at about 100 gallons per person and puts the full setup at under $1,500 for a house, with a 300 to 500 gallon tank at about $250 to $500.
• Rehabilitate the well. Penn State lists acid for scale, chlorine for iron bacteria, brushing, jetting, and surging, and warns that chlorine and acid must never be in the well at the same time.
• Hydrofracture. Water pumped under high pressure opens cracks in the rock around a drilled well. The Well Guide (October 2026) lists $1,500 to $3,000 nationally, while a Southern California contractor quotes $3,000 to $8,000.
• Deepen the well, or drill a new one. Penn State and Wellowner.org both say a deeper well may not give more water, and can bring more minerals, salt, sulfur, iron, or manganese. The Well Guide lists deepening at $3,000 to $10,000 and a new well at $25 to $65 per foot, or $9,000 to $13,000 for 150 ft.

These costs come from commercial guides, and they disagree by a wide margin. Penn State's storage numbers are the only ones here from an extension service. Ask for two written quotes.

Help paying for a dry well

New Hampshire activated its Emergency Drought Assistance Program for the third time since 2020 in January 2026, with $1.5 million for low-income homeowners, NEIWPCC reports. It pays for more storage, a lower pump, deepening, a new well, or a public water connection. California's Department of Water Resources runs a Dry Well Reporting System that has logged 6,215 dry well reports; a report is not an aid application, but it points owners to aid. The nonprofit Water Well Trust funds wells for low-income homeowners. Ask your state's environment or health agency what is open where you live.

How common is a dry well?

More than 43 million people in the United States use a private well, according to the USGS. A 2017 study in Environmental Research Letters found that 3.5 percent of domestic wells in the western United States were dry in 2013 to 2015, about 1 in 30, and another 6.3 percent of wells had less than 5 meters of water above the intake.

After the water comes back

A well that ran low, or had its pump pulled, can stir up sediment and let bacteria in. Test the water once it runs clear, using our well water testing guide, and treat the well if the test shows coliform, following how to treat a well. Our well lookup finds your well's depth and the water level from its drilling record, the first numbers a pro asks for. If your well has no record, here is how to find its depth anyway.

If a new or deeper well is on the table, our water well drilling cost guide has a calculator by depth and region. If the well recovers and the pump is the suspect, see well pump repair.