Well Running Dry? Causes, Signs & Solutions

That sinking feeling when the faucet sputters and nothing comes out—is your well actually running dry, or is something else going on? Here's how to tell, what's causing it, and what you can do about it.

Signs Your Well May Be Running Dry

Early Warning Signs

• Sputtering faucets: Air mixing with water as pump draws air
• Muddy or sandy water: Pump pulling from bottom sediment
• Pressure drops during use: Tank depletes faster than well refills
• Water runs out mid-use: Shower goes cold, washing machine stops
• Pump cycles frequently: Short cycling as well can't keep up

Advanced Signs

• "Recharge time" needed: Must wait hours between water use
• No water at all: Complete depletion
• Pump runs but produces nothing: Below water level
• Burnt-out pump: Running dry damaged the motor

Not Always a Dry Well

Similar symptoms can be caused by:

• Failed pump (common—check first)
• Clogged well screen (treatable)
• Broken drop pipe
• Electrical problems

A professional evaluation determines the actual cause.

Why Wells Run Dry

1. Seasonal Water Table Drop

The most common cause in San Diego County. Water tables naturally rise and fall:

• Winter/Spring: Higher after rainfall
• Summer/Fall: Lower as groundwater depletes
• Drought years: May never fully recover

If your well only has problems in late summer/fall, this is likely the cause.

2. Aquifer Depletion

Long-term decline in groundwater levels:

• More wells tapping the same aquifer
• Increased pumping from agricultural/commercial users
• Development reducing recharge areas
• Multi-year drought compounding the problem

Some San Diego County aquifers have dropped significantly over the past decades.

3. Well Too Shallow

Wells drilled during wetter periods may not reach today's water levels:

• Well adequate 20 years ago, marginal now
• Original drilling hit water early, stopped too soon
• Area's static water level has declined

4. Increased Demand

Your water use may have increased:

• Added irrigation system
• More people in household
• Swimming pool
• Livestock or agriculture

Your well may have adequate yield, but demand exceeds it.

5. Pump Set Too Shallow

If the pump is above the current water level:

• Water level dropped below pump intake
• Pump draws air instead of water
• May be fixable by lowering the pump

6. Clogged or Damaged Well Screen

The screen at the bottom of the well can become:

• Clogged with mineral deposits
• Blocked by iron bacteria
• Collapsed or corroded

This reduces flow even though water is available.

Diagnosing the Problem

Flow Test

A professional flow test measures:

• Static water level: Water level when pump is off
• Pumping water level: How far it drops during pumping
• Recovery rate: How fast it refills
• Sustainable yield: GPM the well can provide long-term

This tells you if the well can be rehabilitated or needs replacement.

Well Video Inspection

A camera inspection shows:

• Condition of casing and screen
• Actual water level
• Obstructions or damage
• Whether deepening is feasible

Solutions for a Dry Well

1. Lower the Pump

Best for: Water level dropped but water is still there

• Move pump deeper in the well
• May require longer drop pipe and wire
• Only works if well has adequate depth

Cost: $800-$2,000

2. Well Rehabilitation

Best for: Clogged screen reducing flow

• Chemical treatment to dissolve deposits
• Surge/swab cleaning
• Hydro-jetting

Cost: $1,500-$5,000

3. Install Storage Tank

Best for: Low-yield well that can't meet peak demand

How it works:

• Large tank (500-5,000+ gallons) stores water
• Well fills tank slowly over time
• Booster pump delivers water to house
• Peak demand met from stored water

Cost: $3,000-$10,000 depending on tank size

4. Well Deepening (Hydrofracturing)

Best for: Wells that haven't reached the best water zone

• Drill deeper into existing well
• Or use hydrofracturing to open new water channels
• Not always successful—depends on geology

Cost: $3,000-$8,000

5. Drill New Well

Best for: Well that cannot be rehabilitated

• New well in different location or deeper zone
• Modern drilling reaches deeper aquifers
• May be able to share water with existing well

Cost: $15,000-$50,000+ depending on depth

6. Water Conservation

Sometimes managing demand is the answer:

• Low-flow fixtures
• Efficient irrigation (drip vs. spray)
• Time-of-day water use scheduling
• Rainwater harvesting for landscaping

San Diego County Considerations

Areas with Known Water Table Issues

• East County (Alpine, Descanso): Fractured rock aquifers, variable yield
• Ramona/Julian: Many wells competing for same zones
• Valley Center hills: Some areas with declining tables
• Fallbrook/De Luz: Variable, some areas stressed

Drought Impact

California's drought cycles significantly impact well water levels. Some wells that worked fine for decades have struggled in recent years. This doesn't mean they're permanently dry—but it may mean adjustments are needed.

Preventing Pump Damage

Running a pump dry destroys it quickly:

• Motor overheats without water cooling
• Bearings fail
• Impellers damaged

Protection Options

• Low-water cutoff: Shuts pump off when water drops below sensor
• Pump saver: Monitors amperage and shuts off if pump runs dry
• Cycle timer: Limits pump run time to prevent overheating

Frequently Asked Questions