Does the Weather Impact Your Swimming Pool? | Pool Water Chemistry | Pentair

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Yes! Rain or shine, weather conditions impact the chemistry of your pool water, and as you know, it’s important to maintain optimal water quality so that your pool is safe to swim in. 

So here’s what you need to know about the relationship between weather and pool water. 

multiple children laughing smiling and having fun in outdoor swimming pool with splash of water

how rain affects pool water quality

While a light drizzle may not have much impact on your pool, heavy rainfall is a different story. Excess rain dilutes the chemicals in your pool water and creates a pH imbalance.

Rain also washes bacteria, dirt, algae spores, and other debris into your pool, which can attack the active chlorine and mitigate its effects. Get into the habit of checking your pool water pH after heavy rainfall to see where you should make adjustments. 

Pool water quality on sunny days

Hot, clear summer days are the best time to enjoy the pool, but the heat also poses risks to your water quality. When it’s hot outside, UV rays break down the chlorine content in your water faster than on cooler days.

Your pool is also more susceptible to algae growth on hot days. Algae require water and sunlight to thrive; so pools on a hot summer day are the perfect breeding ground.

The more frequently your pool is used, the sooner you’ll need to treat the water because the chemicals are treating the oils, sunscreen and sweat from swimmers – in addition to being affected by the sun. So on sunny days it’s a great idea to check the water every day.

the takeaway: be mindful of the weather

While the rain might put a damper on your swimming plans, sunshine can also affect how often you can use your pool. It’s best if you create a regular maintenance schedule and get in the habit of checking your pool water daily. The sooner issues with your water quality are detected, the sooner you can correct them and enjoy your pool!

For more pool maintenance tips and insights, head back to the Pentair blog.

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