Annual Well
Maintenance Checklist:
Everything You Need to Do Each Year

Most well owners do nothing until something breaks. That is the wrong model. A well is a mechanical system with moving parts, electrical components, and a direct connection to groundwater that changes with the seasons. Treating it like a set-and-forget utility rather than a maintained asset is how wells fail early, how contamination goes undetected for years, and how a $300 service call becomes a $3,000 emergency.

This checklist gives you specific tasks for each season, explains exactly what you are looking for on each check, separates what you can do yourself from what requires a licensed contractor, and flags the signs that mean stop using the water and call today rather than next month.

Annual Well Maintenance At a Glance

Everything below explains exactly how to do each task, what a passing result looks like, and when to call a contractor instead.

The Core Three: What Every Well Owner Must Do Every Year

Before any seasonal specifics, these three tasks are the non-negotiable annual baseline. Everything else builds on them.

Spring Checklist: The Most Important Season

Spring is the highest-risk period for well contamination and the best time for a thorough annual inspection. Frost heaving can shift the wellhead. Snowmelt and spring rain drive the highest bacterial contamination risk of the year. Winter damage becomes visible as the ground thaws.

Wellhead and Casing Inspection

Walk the perimeter of the casing and check each of these specifically:

Water Testing After Snowmelt

Schedule water testing in early to mid spring, after the majority of snowmelt runoff has passed through the aquifer. Spring is when contamination risk peaks because surface water infiltrates rapidly through unfrozen soil and carries bacteria, nitrates, and sediment into shallow aquifers.

Test at minimum for total coliform bacteria, E. coli, and nitrates. If you are near agricultural land, add nitrates to a more frequent schedule. If you have never tested comprehensively, spring is the time to run a full panel including metals, pH, hardness, and any contaminants of regional concern.

See how to test your well water for step-by-step sample collection instructions that prevent invalidating the test.

Pressure Tank and Pressure Switch Check

Complete the air charge check described in the Core Three section above. In addition, inspect the pressure switch:

Turn off power to the pump at the breaker. Remove the plastic cover from the pressure switch (one nut at the top holds it). Look at the electrical contacts inside. They should be copper-colored and shiny or dull copper, not black or pitted. Burned or heavily corroded contacts indicate the switch is wearing out and should be replaced before it fails. A new pressure switch costs $25 to $75 and takes about 30 minutes to replace. Also check that the sensing tube (the small tube connecting the switch to the pipe) is free of mineral scale blockage. A blocked sensing tube causes the switch to misread pressure.

Check for insects inside the switch housing. Ants are the most common problem and can bridge the electrical contacts, causing erratic pump behavior.

Filter and Treatment System Inspection

If you have any point-of-entry or point-of-use water treatment equipment, spring is the time to service it:

Cost: Filter cartridge replacement $20 to $80 depending on type. UV lamp replacement $50 to $150.

Summer Checklist: Monitoring Yield and Quality

Summer places the highest demand on residential wells. Irrigation, increased household use, and lower water tables from reduced rainfall create the conditions for two problems that are otherwise invisible: declining well yield and heat-related bacterial growth.

Monitor Well Yield

Pay attention to how the system performs during periods of sustained high demand. Signs of a yield problem:

The pump runs continuously during extended use without reaching cut-off pressure. Pressure drops noticeably after 20 to 30 minutes of continuous irrigation or multiple fixtures running. Recovery is slow after filling a bathtub or running a sprinkler.

If you notice any of these, reduce demand by spacing out high-use activities and scheduling irrigation during the early morning rather than the hottest part of the day. A yield test by a licensed contractor measures how many gallons per minute the well can sustain and at what depth the water table sits during pumping. If the well is marginally meeting demand, a yield test tells you whether you need to deepen the well or whether a storage tank would solve the problem.

Check for Sediment

Fill a clear glass from a cold tap and hold it against a white background. Any cloudiness, sandy grit, or visible particles need investigation. Summer is when wells most often begin showing sediment because:

Drought lowers the water table, forcing the pump to draw from a lower depth that may be closer to the bottom of the well where sediment accumulates. Pump intake screens degrade over time and eventually allow fine particles to pass. The pump may have been set too low when installed.

Persistent sediment despite running water for several minutes signals a well or pump issue that needs a contractor assessment. Sediment wears pump impellers and clogs treatment equipment.

Wellhead Visual Check (Monthly in Summer)

Do a quick monthly pass through summer, particularly after heavy rain events. Check the well cap seal, the casing condition, and the drainage grade around the wellhead. Summer storms can deposit debris around the wellhead and disturb the drainage slope.

Test After Any Flooding or Heavy Rain Event

If the wellhead was submerged, flooded around, or if heavy runoff reached the casing area during a significant storm, test for bacteria and nitrates before resuming normal water use. The EPA notes that any well drawing from 50 feet or less that was flooded or is more than 10 years old should be disinfected and tested after significant flooding.

Fall Checklist: Before the Freeze

Fall maintenance has one dominant focus: protecting the system from winter damage. Frozen pipes and frozen pressure switches are the most common well system failures in cold climates, and both are entirely preventable.

Inspect Exposed Pipe Insulation

Any pipe that runs through an unheated space is at risk. Check insulation on:

The pressure tank supply line where it exits the well casing into the crawl space or basement. Any horizontal pipe run in an unheated garage, crawl space, or outbuilding. The section of pipe between the pitless adapter and the point where it enters the heated envelope of the house.

Replace missing or degraded pipe insulation before the first hard freeze. Foam pipe insulation sleeves cost $3 to $8 per linear foot and install in minutes. For pipes in particularly exposed locations, consider heat tape as a backup.

Check the Pressure Switch for Draft Exposure

If your pressure tank and pressure switch are in a garage, outbuilding, or area with air infiltration, the pressure switch is vulnerable to freezing. A frozen pressure switch cannot read pressure correctly and will fail to start the pump when pressure drops. Check for gaps in walls or ceilings around the pressure tank area and seal them. If the space genuinely cannot be kept above freezing, a small electric heat cable around the pressure switch housing is a low-cost solution.

Disconnect and Drain Outdoor Connections

Disconnect garden hoses from all outdoor hose bibs before first frost. A hose left connected traps water in the supply line, which can freeze back into the well supply piping. Even frost-free hose bibs require the hose to be disconnected to drain properly.

If you have any above-ground irrigation supply lines that are not below the frost line, drain and blow them out with compressed air before the ground freezes.

Annual Professional Inspection: Schedule for Fall or Spring

The NGWA recommends that private wells receive an annual professional inspection by a licensed or certified water well systems professional. This inspection covers what homeowners cannot safely or practically do themselves:

A flow test measuring gallons per minute at the pump. A check of the water level before and during pumping to establish the dynamic and static levels. Pump motor performance check including amp load, grounding, and line voltage. Pressure tank and pressure switch assessment. Visual inspection of all wellhead equipment for code compliance and sanitary condition.

Cost: $250 to $550 for a standard inspection. $300 to $500 for an inspection with basic water testing included. Schedule in fall or spring when contractors are less likely to be emergency-dispatched and have availability.

Pressure Tank Recheck

Do the Schrader valve air charge check again in fall before the cold sets in. Temperature changes affect air pressure. A tank that read correctly in spring may need a small air top-up before winter. Correct pressure going into winter means one less issue to troubleshoot if the system behaves oddly during a cold snap.

Winter Checklist: Cold-Weather Monitoring

Winter maintenance is mostly monitoring with a few active checks. The goal is catching problems before they become emergencies during the worst possible time to call a contractor.

Monitor Pump Cycling

On a cold day, listen to the system. Is the pump cycling on and off more frequently than usual? Short cycling in winter can indicate that the air charge in the pressure tank dropped further due to temperature, or that the pressure switch contacts are stiffening in the cold and not making clean contact. Neither is an emergency but both warrant attention before they fail completely.

Check for Freezing Risk After Extreme Cold Events

After any extended period below 10 degrees Fahrenheit, check:

Is water flowing normally at all fixtures? A reduction in flow or a completely dead tap on the ground floor or in an area near an exterior wall may indicate a frozen section. Do not leave a suspected frozen pipe situation and hope it resolves itself. Turn off the pump at the breaker and address the frozen section before it thaws and floods.

Is the pressure gauge reading normally? If pressure is extremely high (above 70 PSI) or does not drop when a fixture is opened, the pressure switch sensing tube may be frozen.

Keep Records During Winter Service Calls

Any time a contractor opens the system in winter, document exactly what was done, what parts were replaced, what the water level reading was, and any observations about system performance. Winter service calls are expensive and the documentation is valuable for the spring inspection.

DIY vs. Hire: The Clear Division

Many well maintenance tasks are safe and appropriate for homeowners. Some tasks are not, regardless of skill level.

Red Flags: Call Today, Not Next Month

Some signs warrant calling a licensed well contractor the same day rather than waiting for the next scheduled inspection. Delaying on these costs significantly more in the end and some carry health risks.

Yellow Flags: Address Within 60 Days

These signs are not emergencies but indicate a deteriorating condition that will become a problem if left unaddressed.

The Maintenance Record: What to Track and Why

Every well owner should keep a maintenance log. Not an elaborate system, but a simple record that answers four questions about any given year: what did the water test show, what physical condition was the wellhead in, what did the pressure system show, and what contractor work was done.

When a well develops a problem, the first thing a contractor needs to know is whether the problem appeared suddenly or gradually over time. A homeowner who can say "the pressure tank air charge has been dropping about 5 PSI per year for three years" is giving the contractor diagnostic information that saves time and money. A homeowner who says "it just stopped working" gives the contractor nothing to work with.

Records also matter for property resale. A documented maintenance history is evidence of responsible ownership and reduces buyer concerns about well condition. New Jersey law requires sellers to provide well water test results to buyers. Many buyers in other states now request maintenance records as standard due diligence.

What to record after each maintenance check

Date of inspection. Water test results (save the actual lab report in the same folder or file). Wellhead condition notes (cap condition, grade slope, any visible damage, casing height measurement if you re-measure). Pressure tank air charge reading before and after any adjustment. Any equipment replaced, including the date, part name, and supplier. Contractor visit notes including what was checked, what was found, and what was recommended.

Where to keep records

Keep paper copies in the same location as your well construction report, which should be a document you received when the well was drilled or when you purchased the property. Digital copies in a cloud folder or emailed to yourself provide a backup. If you cannot find your original well construction report, contact your state environmental or water resources agency. Most states require contractors to file well logs and maintain them in a public database searchable by address.

What to ask for from a contractor after any service call

A written report listing everything that was checked, every observation made, and every recommendation. A copy of any water test results. The make, model, and serial number of any replaced equipment. A contractor who does not provide written documentation after an inspection is not providing a complete service.

Annual Well Maintenance Cost Summary

Understanding what maintenance actually costs makes it easier to budget and to recognize when a quote is out of line.

A homeowner doing their own visual inspections and filter service, using county health department water testing, and having a professional inspection every other year can maintain a well for $100 to $300 per year on average. Annual professional inspection every year adds $250 to $550. The NGWA annual inspection recommendation is sound, particularly for wells more than 10 years old.

Frequently Asked Questions

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