Water Loss from Swimming Pools: How Much Does It Evaprate?


Swimming pools are a great way to cool off and have fun in the summer. However, they can also be a lot of work to maintain. One of the biggest challenges of pool ownership is water loss.

Water loss can occur through a variety of ways, including evaporation, splashing, and filter backwash. Evaporation is the most common cause of water loss in swimming pools.

How Much Water Does a Swimming Pool Evaporate?

The amount of water that evaporates from a swimming pool depends on a number of factors, including:

  • The size of the pool
  • The climate
  • The wind speed
  • The amount of shade
  • The amount of sun exposure

In general, a swimming pool can lose about 1/2 inch of water per day due to evaporation. This means that a 10,000 gallon pool can lose about 500 gallons of water per day due to evaporation.

How to Reduce Water Evaporation from Your Swimming Pool

There are a few things you can do to reduce water evaporation from your swimming pool:

  • Cover your pool when it is not in use.
  • Install a pool shade.
  • Plant trees around your pool to provide shade.
  • Keep your pool clean and free of debris.
  • Adjust your pool's pump and filter to reduce water loss.


Water evaporation is a natural process, but it can be a major source of water loss for swimming pools. By taking steps to reduce water evaporation, you can save money on your water bill and help to protect your pool's water quality.

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