If your pool water level seems to be dropping faster than usual, you might be asking:
👉 “Is my pool leaking… or is it just evaporation?”
This is one of the most common concerns for pool owners—and knowing the difference can save you thousands of dollars in repairs.
In this guide, we’ll break down:
The simple bucket test
Key visual warning signs
When to take action
You can also check out the YouTube video here:
Why Pool Water Levels Drop
Before assuming a leak, it’s important to understand that some water loss is completely normal.
Normal Causes of Water Loss:
Evaporation (especially in hot climates like Florida)
Splash-out from swimmers
Backwashing filters
Wind exposure
However, excessive or rapid water loss could indicate a problem.
The Simple Bucket Test (Step-by-Step)
One of the easiest ways to determine if your pool is leaking is the bucket test.
As highlighted in the video, this is a quick and reliable method any homeowner can do.
How to Perform the Bucket Test:
Step 1: Fill a Bucket
Fill a 5-gallon bucket with pool water.
Step 2: Place It on a Step
Set the bucket on a pool step so the water inside matches the pool level.
Step 3: Mark the Water Levels
Mark the inside water level (bucket)
Mark the outside water level (pool)
Step 4: Wait 24 Hours
Leave the pool running normally.
Step 5: Compare the Results
If both levels drop equally → Evaporation
If the pool drops more → Possible leak
Visual Signs Your Pool Might Be Leaking
Beyond the bucket test, there are several red flags to watch for:
1. Rapid Water Loss
If you’re adding water frequently, that’s a major warning sign.
2. Cracks in the Pool Structure
Pool shell cracks
Deck cracks near the pool
3. Wet Spots Around the Pool
Soggy areas in your yard could indicate underground leaks.
4. Air in the Pump System
Bubbles in the pump basket or returns may signal suction-side leaks.
5. Increased Chemical Usage
Leaks dilute your water, causing:
Higher chlorine demand
Unstable chemistry
Evaporation vs Leak: What’s Normal?
A typical pool can lose:
👉 ¼ to ½ inch of water per day due to evaporation
Factors that increase evaporation:
High heat
Low humidity
Wind exposure
Warm water temperatures
Anything beyond that consistently? Time to investigate.
Common Areas Where Pools Leak
If a leak is confirmed, it’s usually found in:
1. Plumbing Lines
Underground pipes can crack or shift.
2. Skimmer Box
Cracks around the skimmer are very common.
3. Pool Equipment
Pump seals
Filter connections
Heater components
4. Pool Lights
Light niches are a known leak point.
When to Call a Professional
If your bucket test confirms a leak, don’t ignore it.
Call a professional if:
Water loss is significant
You can’t locate the source
Structural damage is visible
Early detection can prevent:
Expensive repairs
Deck damage
Soil erosion
How to Prevent Pool Leaks
While not all leaks are preventable, you can reduce risk by:
✔ Regular inspections
✔ Maintaining proper water chemistry
✔ Checking equipment weekly
✔ Fixing small issues early
Preventative maintenance is always cheaper than repairs.
Final Thoughts
A leaking pool can go unnoticed for weeks—but the damage adds up fast.
The good news?
👉 The bucket test gives you a simple, reliable answer in just 24 hours
If you suspect a leak:
Test it
Inspect it
Act quickly
Because in the pool world…
small leaks turn into big problems fast.
FAQ Section
How do I know if my pool is leaking or evaporating?
Use the bucket test. If the pool loses more water than the bucket, you likely have a leak.
How much water loss is normal in a pool?
About ¼ to ½ inch per day depending on weather conditions.
Where do most pool leaks occur?
Common areas include skimmers, plumbing lines, equipment, and pool lights.
Is a pool leak serious?
Yes. Left untreated, it can cause structural damage and costly repairs.