Many people mistakenly believe rainwater won’t have an effect on their outdoor pool. In reality, this is not the case. It may seem logical to think that rainwater will do little more than add to a pool’s water level. However, rainwater is acidic, and when it accumulates in a pool, it causes the pH of pool water to decrease. While this may not seem to present an issue, it can cause burning pain in the eyes while swimming and create unsanitary water conditions. For these reasons, the pH level of pool water is kept constant at about 7.5. If the pH falls below this level, certain issues may arise due to overly acidic water.
How to Correct the pH After Rainfall
It is important to regularly monitor the pH of pool water to ensure it remains neutral. After a light rainfall, it is generally not necessary to take any action to adjust the pH of the water. Light rain that adds less than an inch to the water level in a pool will typically leave the pH level unchanged. If there is heavy rainfall, it may be necessary to correct a pH imbalance afterward. If the water level in the pool increases by more than one inch, checking the pH will be necessary. If the pH is too low, it may be necessary to drain the pool slightly to raise the alkalinity of the water. When an excessive amount of rainwater blends with existing pool water, the pool’s chlorine concentration becomes diluted. Draining a specified amount of pool water will help to increase the pH as the chlorine will no longer be quite so diluted.
Rainwater May Sometimes Benefit a Pool
Occasionally, rainfall may benefit the water in a pool. Certain chemicals used in pool water may fall out of balance from time to time and rainwater can help to correct that imbalance. Of course, it is still necessary to regularly check the pH of pool water, especially following particularly heavy rainfall. This will ensure that swimmers stay safe and comfortable and pool water remains in optimal condition.
At Blue Chip Pool Service, we understand how rainwater can affect your pool. If you’d like to receive your first free pool cleaning, don’t be afraid to contact us! Our experts are ready and willing to help you maintain your pool.