What does rain do to swimming pool water?

Rain causes several changes to pool water chemistry.  Two of them produce noticeable results in swimming comfort and the sanitary condition of the pool immediately. Other changes while having already happened may not be noticeable for a few weeks.  These other changes are due to dilution of stabilizing and water balancing chemicals.

In this post I want to focus on the changes in swimming comfort and the sanitary condition of the pool due to changes in the pH and TA.

Rain almost immediately causes the pH (Potential Hydrogen) in the pool water to rise while also reducing the TA (Total Alkalinity) slightly via dilution.  Higher pH will cause more of the chlorine in a pool to become inactive or “fall asleep” reducing it’s effectiveness. Lower TA via dilution also destabilizes the pH to some degree allowing it to move higher more quickly.

The power of chlorine to effectively do it’s germ-killing varies with pH level. As pH goes up, the ability of chlorine to kill germs goes down (see the scale below).

Another affect of high pH is a reduction in swimming comfort. A person’s body has a pH between 7.2 and 7.8, so if the pool water goes outside this range then swimmers will start to feel irritation of their eyes and skin. Ensuring the pH is kept between 7.2 – 7.8 will both ensure the chlorine’s germ-killing power is unlocked while also helping to reduce skin and eye irritation. See this Centers for Disease Control and Prevention (CDC) pH & Clorine article.


More Pool Maintenance Nuggets of Wisdom »

Build the Pool of Your Dreams

The convenience of having your own beautiful glimmering oasis of refreshing pool water just a few steps from your back door is truly a splendid thing. A pool can be everything from a source of evening relaxation, to a morning fitness spot, to a social status symbol. Your home swimming pool can be anything you want it to be.

Blue Science will work hand in hand with you to design a one-of-a-kind dream pool which perfectly complements your backyard environment. Give us a call today.

What Customer are Saying About our Tampa St Pete Pool Care

"Hi all, simply a 5*, a thank you and a strong recommendation. Not only does Kevin D look after our pool very well. This week our dog ran out as Kevin opened the yard gate. Kevin did a stellar job, not only alerting us of the situation, but he stayed with us for nearly 30mins, looking for our dog. And it was Kevin in fact, who found and brought him back. A true example of customer experience excellence and committment - not only in standard duties, but going the extra mile where and when needed. Well done Kevin B. Well done Blue Science. Thank you!" ~  Mar 6
»Pool Cleaning in Dallas 5/5 ★★★★★
"First time pool owner. I contacted Blue Science because of their upfront cost and recommendations. Brandon was our technician and did a great job of not only attending to the all of the needs of the pool but took the time to explain in detail everything he did regarding the chemicals and there effects on the pool. I highly recommend Brandon and hopefully he will continue to be our service technician." ~  Feb 23
»Pool Cleaning in Katy 5/5 ★★★★★
"Wally Garza has been doing an amazing job keeping our pool clean and beautiful! From the initial service setup, through the whole year of maintenance, I’m very please with this company. I highly recommend them!" ~  Jan 30
»Pool Cleaning in Houston 5/5 ★★★★★
"The home we recently purchased had an unground pool that we had no idea how to maintain. Thanks to Brandon King, we have enjoyed our beautiful pool all summer! He is reliable and knowledgeable as well as professional. So glad he’s our pool tech!" ~  Oct 2
»Pool Cleaning in The Woodlands 5/5 ★★★★★
"Josh does a wonderful job! He's always positive and professional and makes the pool look great! Keep him coming! Thanks" ~  Sep 5
»Pool Cleaning in Pearland 5/5 ★★★★★
Review Our Services

Tampa St Pete Pool Brands We Know & Use

   
When providing pool repairs and equipment installations in Tampa St Pete, we use only supplies and parts from top pool companies.