The storm passed but the well stayed silent
Imagine a homeowner hearing a close lightning strike during a nighttime storm. The lights return, but the well pump does not start and the pressure gauge falls toward zero. The control box smells hot. This is an illustrative scenario. A lightning-related surge can damage a breaker, disconnect, pressure switch, control box, variable-speed drive, pump motor, cable splice, or other equipment, while an unrelated outage or mechanical failure can produce the same symptoms. Do not repeatedly reset the system and hope it clears.
Wait until the thunderstorm is over before approaching plumbing or electrical equipment. CDC advises avoiding water and connected electrical equipment during thunderstorms because lightning can travel through plumbing and electrical systems. After conditions are safe, keep everyone away from smoke, arcing, melted insulation, standing water near electricity, or a damaged well enclosure. Call the utility for downed lines or service problems, emergency services for fire, and a qualified electrician or well professional for equipment diagnosis.
Make the first checks from a safe location
Confirm whether the whole property lost power or only the well circuit. From a dry, accessible location, note the main service condition, well breaker position, controller display, alarm lights, pressure gauge, water flow, sounds, odors, and visible damage. Photograph fault codes before power is cycled. Ask neighbors whether they also lost power. Do not remove a control-box cover, touch a pressure switch, open a well cap, or stand in wet soil beside damaged wiring.
A tripped breaker is a symptom, not a repair instruction. One reset may sometimes be part of a manufacturer's or professional procedure, but repeated resetting can energize a shorted cable or failed motor. If a breaker trips again, a fuse opens, the control faults, the pump hums without building pressure, or equipment heats, leave the circuit off and call. Never install a larger fuse or breaker, bypass a controller, hold contacts closed, or connect the pump directly to power.
- Utility power status
- Breaker or disconnect position
- Controller code before reset
- Pressure and available flow
- Smoke, heat, odor, or arcing
- Standing water and enclosure damage
Understand what surge protection can and cannot do
Washington State Department of Health pump-control guidance describes a lightning arrestor as protection for a pump motor and controls from voltage surges caused by lightning, switching loads, and power-line interference. It also states that these devices do not protect against a direct strike. A control box may monitor line voltage and motor power draw, but it cannot make every surge harmless. Protection depends on the complete electrical design, grounding and bonding, equipment ratings, installation, and maintenance.
CDC recommends whole-house surge protection for appliances, but post-event inspection is still necessary when a well malfunctions. Ask a qualified electrician and well contractor to evaluate the service, grounding and bonding, disconnect, surge-protective devices, controller, motor circuit, and any communications or sensor wiring. Do not assume a green indicator proves the pump circuit is undamaged, and do not add a plug-in protector to hardwired equipment. Replacement protection must match the electrical system and local code.
Test the electrical path before pulling the pump
A qualified person should verify incoming voltage, voltage under load, breaker and disconnect condition, grounding and bonding, controller or capacitor condition, pressure-switch operation, motor current, insulation resistance, and continuity using procedures appropriate to the pump. A three-wire submersible system has an above-ground control box that a two-wire motor may not use. Variable-speed and constant-pressure systems have manufacturer-specific fault histories and test requirements.
The goal is to localize the fault without replacing unrelated parts. A failed surge device or control component can prevent a sound pump from starting. A damaged drop cable, splice, or motor can trip a new controller. Pulling a pump before electrical testing adds cost and can disturb the sanitary seal. Conversely, energizing a cable with damaged insulation can create shock, fire, or equipment hazards. Ask for measured results and the manufacturer's diagnostic basis, not only a list of swapped parts.
- Supply voltage and phase condition
- Breaker, fuse, and disconnect
- Grounding, bonding, and surge device
- Switch, controller, and fault history
- Motor current and winding tests
- Cable and splice integrity
Check the hydraulic system after power is restored
Once electrical safety is established and the pump runs, confirm that pressure rises normally, the pump stops at the intended control point, and pressure holds with no water use. Watch for air spurts, sediment, changed flow, rapid cycling, continuous running, relief-valve discharge, unusual vibration, or a pump that runs without developing pressure. Those clues can indicate a drained line, damaged check valve, pressure-tank issue, broken pipe, pump damage, or a separate well problem.
Do not close valves to deadhead a pump, alter pressure-switch settings, or keep a pump running when it cannot build pressure. A pump motor can survive while another component fails, and a surge can coincide with storm runoff, flooding, or a utility outage. The service report should document voltage, current, pressure, flow, runtime, tank behavior, shutdown, and hold test. If the well lost prime or pressure, the return-to-service plan should also address sanitary risk.
Decide when the water also needs testing
An electrical surge by itself does not automatically contaminate groundwater. Water-quality concern increases if the well lost pressure, the cap or sanitary seal was opened or damaged, floodwater reached the well, a pipe broke, the pump was pulled, or repair work exposed the system. CDC recommends testing when any part of a well system is repaired or replaced and when color, taste, or smell changes. Use a state-certified laboratory and ask the health department which tests and timing apply.
Until officials or the contractor establish that the system remained sanitary, use a safe alternate drinking-water source when there was pressure loss, inundation, or an opening to contamination. Do not rely on clear appearance, odor, a countertop filter, or a home bacteria strip. Do not disinfect automatically before collecting any samples the health department wants first. If disinfection is directed, follow the well-specific procedure, flush without overloading the septic system, and collect confirmation samples at the directed time.
- Loss of system pressure
- Damaged or opened well cap
- Flood or runoff entry
- Broken buried or drop pipe
- Pump removal or sanitary-seal work
- New taste, color, odor, or sediment
Coordinate the right professionals
A utility handles service-side outages and downed lines. A qualified electrician evaluates the building service, grounding, bonding, panels, and unsafe wiring. A licensed or otherwise qualified well contractor evaluates the pump, drop cable, controls, pressure equipment, well seal, flow, and sanitary restoration. The health department and certified laboratory guide water testing. Some companies cover more than one scope, but the invoice should identify who accepted each part.
Provide the storm date and time, strike location if known, outage history, fault codes, breaker behavior, water symptoms, equipment models, previous readings, and photographs. Ask the contractor to save failed surge devices, control boards, capacitors, or motors when safe because an insurer or manufacturer may request them. Do not present lightning as the proven cause before testing. A utility voltage event, age-related failure, water intrusion, insects, corrosion, or mechanical overload may be responsible.
Improve resilience after the repair
After repairs, ask the electrician whether the service and well equipment have correctly selected surge protection, grounding, bonding, disconnects, and enclosure protection. Ask the well contractor whether control settings, tank size and precharge, cable protection, splice condition, and pump safeguards match the installed motor. Any upgrades must follow equipment instructions and local electrical and well rules. More devices are not automatically better if they are mismatched or poorly grounded.
Keep the well area graded and protected from runoff, maintain a secure vermin-resistant cap, and prevent landscaping or vehicles from damaging conduit. Label the well disconnect and keep service clear, but do not create an improvised outdoor extension connection for a generator. If backup power is desired, have professionals size and install an approved transfer arrangement for the pump's starting and running load. Record baseline pressure, flow, current, controller settings, protection models, and inspection dates so the next event can be compared with known-good operation.
- Documented surge-protection design
- Verified grounding and bonding
- Weatherproof equipment and conduit
- Correct pump and control protection
- Approved backup-power connection
- Baseline operating measurements
Frequently asked questions
Can lightning damage a buried pump? A surge can travel through electrical conductors and damage controls, cable, or the motor, but testing is needed to identify the failed component. Should I reset the breaker several times? No. Repeated trips require diagnosis. Does a lightning arrestor prevent all damage? No. Washington guidance says it does not protect against a direct strike. Is the water unsafe after every strike? Not automatically. Testing becomes important when pressure was lost, the well was opened or damaged, flooding occurred, repairs were made, or water changed.
Can I run the pump from a portable generator? Only with a professionally sized and approved connection that prevents backfeeding and supplies the pump correctly. Should the pump be pulled immediately? Not before safe above-ground and circuit testing identifies a reason. Who should sign off? Use the utility when its service is involved, a qualified electrician for the electrical system, a qualified well contractor for pump and well operation, and the health department or certified laboratory for water safety. Keep every test result and replaced-part record.