Why is my well pump water pressure getting worse?

What worsening well pressure actually means

Pressure that gets steadily worse is a system telling you something's wearing out or losing charge. The key word is worsening. A sudden total loss points to a tripped breaker or dead pump. A slow decline points to the tank, the switch, or the pump tiring.

Your well system is simple: a pump pushes water into a pressure tank, and the tank holds pressure so the pump isn't running every time you open a tap. When any part of that loop slips, pressure suffers.

The good news is that the most common cause, a waterlogged pressure tank, is often a free or cheap fix you can do in an afternoon.

The bad news is that a worsening problem left alone tends to cascade. A bad tank makes the pump short-cycle, and short-cycling kills pumps.

The usual suspects, in order

Start with the pressure tank. It's the part most likely to fail and the cheapest to rule out. When its air charge bleeds off or the internal bladder tears, the pump loses its cushion and can't hold steady pressure.

You'll know it by the sound. A failing tank makes the pump click on and off rapidly, sometimes every few seconds during use. That rapid cycling is the single clearest symptom in the whole system.

Next up is the pressure switch. It's a small box wired to the pump, and its contacts pit and corrode over time. When it cuts the pump off early, pressure never climbs to where it should.

If the tank and switch check out, you're looking at the pump or the well itself. Sediment slowly clogging the intake, worn impellers, or a dropping water table all cause a gradual decline.

A leak in the drop pipe is less common but worth ruling out, especially if the pump runs constantly and you've spotted a soggy patch in the yard.

Working the problem step by step

Do this in order. Skipping ahead wastes money on parts you might not need.

First, kill power at the breaker. Well pumps run on serious voltage, and you'll be near the switch and tank.

Open a faucet to drain the system pressure to zero. You can't read the tank's air charge accurately with water pressure in it.

Find the air valve on top of the tank. It looks like a tire valve. Press a tire gauge on it. On a 40/60 switch system, you want about 38 psi. If it reads low, add air with a compressor or bike pump until it's right.

If water sprays out of that valve instead of air, stop. The bladder's torn and the tank needs replacing.

With the tank sorted, pop the cover off the pressure switch (power still off) and look at the contacts. Burnt, black, or pitted metal means the switch is on its way out.

Check your sediment filter and a couple of faucet aerators. Grit or brown buildup points to well sediment loading the system.

Restore power, run a full cycle, and see if pressure holds. If it does, you're done. If not, you've narrowed it down for the pro.

• Breaker off before touching anything
• Drain system to zero to read tank air
• Set tank air 2 psi below cut-in
• Inspect switch contacts for pitting
• Check filter and aerators for sediment
• Run one full cycle and note the gauge

What this costs in 2026

If it's the tank air charge, your cost is basically free. A tire gauge and a compressor you probably already own.

A new pressure switch runs $15 to $40 for the part. If you're comfortable with the wiring, that's a DIY fix. A pro swap runs $150 to $250 with the service call.

A replacement bladder pressure tank costs $200 to $500 for the tank itself, depending on size. Installed by a plumber or well contractor, budget $450 to $900 total.

A submersible pump replacement is the big one. Expect $900 to $2,500 installed once you factor in pulling the old pump, the new pump, wire, and labor. Deep wells push the high end.

Professional repair typically runs $150–$450. This is not a DIY job, so plan on hiring a pro.

The math usually favors checking the tank yourself first. A $15 air adjustment that saves an unnecessary $400 tank purchase pays for a lot of your time.

What you can do versus what needs a pro

Checking and adjusting the tank air charge is squarely DIY. So is swapping a sediment filter and cleaning aerators.

Replacing a pressure switch is DIY-friendly if you understand basic electrical safety and can confirm power is off with a tester. If wiring makes you nervous, hand it to a pro. A miswired switch can burn out the pump.

Anything that involves pulling the pump is a licensed well contractor's job. A submersible sits at the bottom of the well casing on 100-plus feet of pipe and wire. Getting it up and back down safely takes gear and experience.

Well depth work, drop pipe leaks, and dropping water levels are all pro territory. These need diagnostic tools most homeowners don't have.

When in doubt, do the cheap checks yourself, then call a pro with your gauge readings. You'll get a faster, cheaper diagnosis when you hand them real numbers.

Can this wait?

Not long. A worsening pressure problem tends to accelerate, and the failure modes are expensive.

The biggest risk is short-cycling. A pump that clicks on and off constantly overheats and wears its start components fast. Weeks of that can kill a pump that had years left.

If faucets are spitting air, treat it as urgent. That means the pump may be running dry, which cooks the motor quickly.

If pressure has dropped but the pump still cycles normally and there's no air spitting, you have a little time. Fix it within a week or two, not months.

Once pressure hits zero, you also risk back-siphonage pulling contaminants into your plumbing. That's a water-safety issue, not just a comfort one.

When the weather is the culprit

Timing tells a story. If your pressure gets worse every August, your well's water level is probably falling during the dry season.

Heavy irrigation makes this worse. Running sprinklers for hours draws the well down faster than the aquifer refills, and pressure sputters.

In cold climates, an unheated pump house is its own hazard. A cracked pressure switch or frozen above-ground line drops pressure fast in a hard freeze.

If your problem is clearly seasonal, note the pattern for your well contractor. Lowering the pump or adding storage can solve a recurring summer drop.

How we approached this

This guide follows the same order a field tech uses on a real service call: cheapest and most likely first, then work toward the expensive and rare.

Cost ranges reflect 2026 US pricing for parts and typical regional labor. Well work varies a lot by depth and access, so treat pump replacement figures as ballparks.

The DIY and pro boundaries here are drawn around electrical and well-depth safety, not around what's technically possible. Just because you can pull a pump doesn't mean you should without the right gear.

When your own checks don't solve it, the fastest path is a licensed well contractor armed with your gauge readings and cycle notes.