Why Your Austin Swimming Pool Water Turns Green After Heavy Rain

by | Feb 27, 2023 | Austin Pool Builders, Pool Builder Austin Texas, Pool Builders Austin Texas | 0 comments

The last thing you want to see in your Austin pool is green water. But this issue can and does happen, often after a heavy rainfall.

Here are some reasons why your pool water may have turned green after it rains, and what you can do about it if it happens.

It Interferes With Your Pool’s Chemical Balance

A heavy rainfall can throw off your pool water’s chemical balance. For instance, lots of rainwater added to your pool can cause the phosphate levels to spike, which can lead to green or cloudy pool water.

It Lowers Chlorine or Salt Concentration

Whatever chemical you’re using to sanitize your Austin pool water, a lot of added rainwater can dilute it. Since the sanitizer is what is helping to ward off microorganisms, low chemical levels relative to water volume can lead to algae growth. This can leave your pool with green water following a rainfall.

It Allows Contaminants to Enter the Pool

Along with all the extra water added to your pool from the downpour, a variety of contaminants can also make way into your pool. It’s common for soil, insects, debris, and other organic materials to be washed into the pool after heavy rain, especially if the pool is surrounded by landscaping.

These materials can create the ideal environment for algae growth. When your pool’s pH levels are modified, algae can quickly grow, causing green pool water.

To avoid your pool water from turning green, make sure to do the following:

  • Check the chemical levels after a rainfall
  • Add enough chemicals to restore balance
  • Drain excess water from the pool if the water levels increase too much
  • Let the pump run after it rains
  • Shock the pool to kill off algae