# How Much Water Does A Pool Lose In The Summer? [Expert Guide!]

When the temperature outside is soaring and there’s no sign of relief in sight, it can be hard to think about anything other than cooling off. But, as much as we’d like to be able to just swan away to our desired region in the blink of an eye, there are a few things that we have to take care of first. One of them is our pool. You may be lucky enough to have a pool that is only used occasionally so you can enjoy the warm weather, but if you have a pool that is connected to a water supply system, you know that it is only a matter of time before you will be using it every year. With that in mind, it is important to be vigilant about how much water your pool is losing everyday because, sooner or later, you will find yourself overwhelmed with dry weather and depleted of valuable H2O.

## How Is The Loss Calculated?

It’s a common misconception that water is lost from swimming pools on a regular basis. In reality, the amount of water lost from a pool varies from day to day and depends on many factors, such as the weather, the temperature, and how much exercise you get in while swimming. To figure out the exact amount of water lost from your pool on any given day, you need to make a few simple calculations. First, you need to determine how much water your pool contains (1) pre- and (2) post-swimming. Then, you need to know how much water is lost from your pool due to evaporation (3) during and (4) after each swim session. To determine how much water is lost due to evaporation, you need to multiply the number of 20-minute sessions in a day by the number of degrees that the pool is opened to the air (in degrees fahrenheit). For example, if you have a pool that is open to the air at the surface and measures 75 feet by 50 feet, then the amount of water lost due to evaporation will be 75 x 20 = 1500 gallons per day. Subtracting the pre-swimming (1350 gallons) from the post-swimming (1750 gallons) leaves 250 gallons per day that is lost due to evaporation. Finally, to determine how much water is lost after each swim session, you need to multiply the number of 20-minute sessions in a day by the number of degrees that the pool is opened to the air (in degrees fahrenheit) again. For example, if you have a pool that is opened to the air at the surface and measures 75 feet by 50 feet, then the amount of water lost due to evaporation will be 75 x 20 = 1500 gallons per day. Subtracting the amount of water lost due to evaporation (1000 gallons) from the post-swimming (2000 gallons) leaves the remaining amount of 200 gallons per day that is lost due to evaporation after each swim session.

## What Is The Difference Between The Three?

As mentioned before, there are three key things that you need to keep track of in order to properly determine how much water your pool is losing. The first and most basic one is the amount of water that your pool contains before and after a given day. The second is the amount of water that is lost during each swim session and the third is the amount of water that is lost due to evaporation after each swim session. The pre-swimming amount of water is quite easy to figure out as it is just the total amount of water in your pool if you include all the equipment and chemicals before starting any swimming workout. The post-swimming amount of water is quite easy to figure out as well because it is just the total amount of water in your pool at the end of the swimming workout. The third and most complex key measurement is the amount of water that is lost due to evaporation. For this measurement, you will need to look at the weather conditions and how hot it is outside compared to how warm (or cold) the water is in your pool. The amount of water that is lost due to evaporation will be greater in hot weather than in cold weather because, as the temperature increases, so will the rate of evaporation. In other words, the water in your pool will be evaporating quicker in hot weather than in cold weather.