6 Signs Your Pool Has a Leak (and What to Do)

The clearest signs a Houston pool is leaking are: water loss faster than evaporation explains, a water level that keeps dropping past the skimmer, constant wet or soggy spots around the pool or equipment, cracks or settling in the deck, air bubbles from the return jets, and chemistry or bills that will not stay put because you are constantly adding water. A little evaporation is normal in our heat, but losing an inch or more a day, or seeing wet ground that never dries, means water is escaping. The bucket test is the quickest way to confirm it.

First: Leak or Just Houston Evaporation?

Before assuming a leak, rule out evaporation, which is significant here. In a hot Houston summer, a pool can normally lose a quarter to half an inch a day, sometimes more when it is very hot, dry, and windy. Splash-out from swimmers and backwashing the filter also remove water legitimately. A leak is when the loss clearly exceeds all of that — and the bucket test settles the question cheaply.

The 6 Signs of a Pool Leak

1. Losing More Water Than Evaporation Explains

The number one sign is a pool that drops faster than normal evaporation accounts for. If you are refilling every few days, or the auto-fill is running constantly, or you are losing an inch or more a day, that is a red flag. Track it: mark the water line and note how far it falls over a day or two, then compare against the normal quarter-to-half inch.

2. The Water Level Keeps Dropping to a Certain Point

A telling clue is where the level stops. If the water always falls to the bottom of the skimmer and then holds, the leak is likely at the skimmer or on the suction plumbing at that level. If it drops below the returns and keeps going, the leak may be lower in the wall or floor. A pool that stabilizes at one consistent level is pointing you toward where the hole is.

3. Constant Wet or Soggy Spots

Water leaving the pool has to go somewhere. Persistent wet areas around the deck, unusually soggy soil on one side of the pool, water pooling at the equipment pad, or a patch of grass that stays wet and lush when the rest of the yard is dry all suggest water escaping underground through the shell or the plumbing. In humid Houston some dampness is normal, but a spot that never dries is suspicious.

4. Cracks, Settling, or Sinking Deck

A leak that erodes or saturates the soil beneath the deck can cause the concrete to crack, sink, or tilt, and can create voids under the coping. In Houston's expansive clay, extra moisture in one area drives uneven movement, so new deck cracks or a section of decking that has dropped can be a downstream symptom of a hidden leak washing out the soil beneath.

5. Air Bubbles From the Return Jets

If you see air bubbles blowing out of the return jets, or the pump basket is full of air, water is not the only thing moving — air is being drawn into the suction side of the plumbing. That often indicates a leak on the suction line, where instead of only losing water, the system pulls in air through the same gap. It is both an efficiency problem and a leak clue.

6. Chemistry and Water Bills That Won't Settle

Constantly adding fresh water to replace what is leaking dilutes your chemistry, so you may notice chlorine and balance that never seem to hold no matter how much you add. A creeping water bill with no change in usage is another quiet sign. If your pool feels like a bottomless pit for chemicals and water, a leak may be the reason.

What to Do: Confirm With the Bucket Test

The bucket test separates evaporation from a real leak, and it is free.

• Fill a bucket with pool water and set it on a pool step so the inside water matches the pool level.
• Mark the water line both inside the bucket and outside on the pool.
• Run the pool normally for 24 hours.
• Compare: evaporation affects both equally, so if the pool dropped noticeably more than the bucket, that extra loss is your leak.

You can repeat the test with the pump off to help narrow whether the leak is in the plumbing (which loses more with the pump running) or the shell.

Narrowing Down Where It Is

A few observations help point a pro to the source before they arrive.

• Leaks only with the pump on: suggests pressure-side return plumbing.
• Leaks worse with the pump off: suggests suction-side plumbing or the shell.
• Level stops at the skimmer: points to the skimmer or that section.
• Wet equipment pad: points to the filter, pump, or valve fittings — sometimes an easy fix.
• Air in the returns: points to a suction-side leak.

Why Finding a Leak Fast Matters in Houston

Beyond wasted water and chemicals, a leak in Houston can do real damage. Water escaping into our expansive clay soil erodes support under the deck and pool, and the uneven moisture can drive settling and cracking that gets expensive. Because our soil reacts so strongly to moisture, a slow leak that would be a nuisance elsewhere can undermine hardscape here. Catching it early keeps a cheap repair from turning into a structural one.

If your pool is losing water faster than evaporation explains, our team offers pool leak detection and repair across the Houston area, from equipment-pad fittings to skimmer, plumbing, and shell leaks, with the specialized equipment to pinpoint a leak without tearing up your yard.

Bottom Line

Some water loss is normal in our heat, but constant refilling, soggy ground, cracking deck, air in the returns, or chemistry that will not hold all point to a leak. Run the bucket test to confirm, note where the level settles, and get it found early — in Houston clay, a small leak left alone can become an expensive structural problem.

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