Signs of Water Loss: When to Consider a Professional Pool Leak Inspection

It’s essential to recognise the signs of water loss and differentiate between normal evaporation and potential leaks.

photo of water in swimming pool

Swimming pool evaporation and water loss are common challenges faced by pool owners.  It’s essential to recognise the signs of water loss and differentiate between normal evaporation and potential leaks. When your pool loses water beyond typical evaporation rates, it may indicate underlying issues that require attention.

Regular maintenance helps identify and address issues such as water loss, equipment malfunctions, and structural damage that could compromise pool safety. This proactive approach is essential for achieving compliance with safety regulations and obtaining a pool safety certificate, certifying that your pool meets the required safety standards.

Identifying Water Loss

Regularly monitoring your pool’s water levels is fundamental to detecting potential leaks. Any significant decrease in water level could indicate a problem that requires investigation. By checking your pool’s water level at least once a week, especially during warmer months when evaporation rates are higher, you can stay proactive in addressing water loss.

Simply stand at the edge of your pool and visually assess the water level against the pool skimmer or tile line, noting any noticeable changes. Placing a permanent marker or tape on the skimmer or tile line serves as a reference point for tracking water level fluctuations over time. If you observe a significant decrease in water level that exceeds normal evaporation rates, it’s important to investigate promptly.

Consider conducting the bucket test to determine if the water loss is excessive, which could indicate a potential leak requiring professional attention.

The Bucket Test:

Evaporation vs a pool leak? To find out if your pool is losing water, there is a simple test you can do to get to the bottom of it. You’ll need a bucket, some masking tape and a marker or pencil.

  1. Choose a spot in your pool where your bucket can sit, such as the top pool step so you can submerge your bucket without it floating away.
  2. Place tape on the outside and on the inside of your bucket before you fill up your bucket with pool water up to 3 cm from the top.
  3. Set your bucket in your chosen location in your pool and mark on your tape where the water level is sitting both on the inside and outside of your bucket.
  4. Leave for 24 hours.
  5. After 24 hours, mark your current water level on your tape for both inside and outside your bucket.

Interpreting the Results:

If both the inside and outside tape has the same difference between your first and second mark, then this is a sign of evaporation.

If the pool’s water level outside the bucket has dropped significantly more compared to the water level inside the bucket, it suggests that the pool is losing water at a faster rate than normal evaporation.

This difference indicates a potential leak in the pool or its plumbing system, as the water loss exceeds what would typically be expected from evaporation alone.

If the results of the bucket test suggest a significant water loss outside the bucket, it’s essential to contact a professional pool leak detection service.

Visual Inspection

There could also be some telltale signs of a leak in your pool’s structure and surround area.

Begin by checking the pool structure for any visible cracks in the lining, tiles, or deck, as these can contribute to water loss and compromise the integrity of the pool over time. Look for areas of moisture around the pool, such as soggy ground or landscaping, which may indicate underground leaks affecting pool stability and water levels.

Examine pool equipment, including pool pumps, filters, and plumbing connections, for signs of pool leaks or malfunctions that could contribute to water loss and impact water circulation and filtration efficiency. You can also monitor water chemistry closely and note any frequent adjustments needed to maintain chemical balance, as this could be a sign of dilution due to water loss.

Additional Indicators

In addition to regular visual inspections, certain indicators can serve as early warnings of potential pool issues that may lead to water loss or affect pool performance. Keep an eye on your water bills for any sudden and unexplained increases, as this could signal a hidden leak in your pool or plumbing system.

Algae growth, especially in colder conditions, may indicate stagnant or improperly circulated water due to leaks or equipment issues affecting water flow and filtration. Pay attention to equipment-related signs such as air bubbles, gurgling noises, or rust marks on pool equipment, which can be indicative of air leaks, water flow disruptions, or corrosion. Respond promptly to these indicators by conducting further investigations, such as professional pool leak detection services, to pinpoint and address the underlying issues.

Ensuring that all elements of your pool are healthy is key to maintaining a safe and enjoyable swimming environment. Find out more swimming pool safety tips to keep you and your pool healthy.

Professional Assessment

Knowing when to call a professional pool technician is crucial for addressing pool issues effectively. If you suspect water leaks but cannot pinpoint its location or if you’ve observed significant water loss despite regular maintenance efforts, it’s time to seek professional assistance.

Professional pool leak detection specialists are equipped with advanced methods such as dye tests and pressure testing to accurately locate leaks within your pool or plumbing system.

Preventive Measures and Maintenance Tips for your Swimming Pool

Implementing preventive measures and adhering to regular maintenance practices are essential for ensuring the longevity and efficiency of your pool. Make it a priority to conduct regular maintenance on your pool and equipment, including cleaning filters, checking pool pump performance, and inspecting plumbing connections for leaks. Keeping up your maintenance can significantly help improve your safety and ensure that your pool inspection goes smoothly.


Managing swimming pool evaporation and preventing water loss are essential aspects of maintaining a healthy and sustainable pool environment. By understanding the factors contributing to water loss and implementing preventive measures, such as regular maintenance and prompt leak detection, you can minimise the impact of evaporation on your pool.

Remember, proactive maintenance not only preserves water but also ensures the safety and longevity of your pool. Whether you’re dealing with normal evaporation or suspecting a leak, taking timely action is key to preserving your pool’s integrity and maximising enjoyment.

Keep these strategies in mind to effectively manage swimming pool evaporation and mitigate water loss for a vibrant and sustainable pool year-round. Timely leak detection and repair play a critical role in maintaining the safety and integrity of your pool, especially when seeking a pool safety certificate from a qualified inspector.

Don’t hesitate to invest in regular inspections and repairs to enjoy peace of mind and a worry-free swimming experience. For more information for pool owners, you can refer to our Pool Inspection Guide.