Will Swimming Pool Water Kill Grass?

The level of chemical content in the swimming pool differs from the normal water content, yet it is good enough to swim in. Some people wake up in the morning to see a dead snake in their pool and what killed it is the chemical composition present in the pool.

Do you have your swimming pool installed in the middle of your lawn and you imagine if the swimming pool water splashes were the reason for some discoloration in the grasses around the pool? The wait is over.

This article will discuss the effects of a swimming pool on grasses, conditions that make your pool water affect your grasses, how to deal with grasses near a swimming pool, and some popular grasses you can have around your pool.

Will Swimming Pool Water Kill Grass

Will swimming pool water kill grasses?

Chemically, the answer depends on the chemical condition of the swimming pool. Swimming pools that are high in acidity or have toxic irregularities will affect grasses if split off.

But in the absence of an imbalanced water condition, swimming pool water wouldn’t kill the grasses.

However, even if the swimming pool water is chemical balanced and doesn’t affect the grasses chemically, swimming pool water can still kill grasses if it creates more than the required wetting to the grasses.

If the water splashes or leaks from a pool component enough to waterlog an area of grasses, the part will suffer oxygen in the root zone and will eventually result in reduced growth in the grasses. If the water doesn’t stop, you might start noticing dull color but this is not enough to kill the grasses.


Conditions that make your pool water affect your grasses

  • High chlorine: The recommended chlorine level is 5 ppm which is the highest standard value in a swimming pool. When some people overstock their swimming pools and they want to just dispose of the water and fill the pool with fresh water, the grasses will suffer from chlorine poisoning. Chlorine is good environmentally friendly if in small quantities. So, you can irrigate your lawn with water from your swimming pool before filling the pool back as soon as possible. Many people used pool water for irrigation because chlorine will be able to kill bacteria and pathogens on the grasses while the grasses still grow.


  • High acidity: The addition of cyanuric acid, muriatic acid, hypochlorous acid, calcium chloride, and other chemicals raise the level of acidity in a swimming pool. If they are all added in excess, the water will have an imbalance in its pH. If such pool water is used to irrigate your grasses, there will be adverse effects on them. They might die, depending on the level of acidity present in the water. You are bound to neutralize acidity in the pool water before either swimming in it or disposal.


  • Algae and algaecides: If your swimming pool contains algae and your next line of action is to use the water to irrigate your lawn, you are off point. Algae aren’t only bad for swimming but are bad for the growth of grasses too. Algae will take over nutrients meant for the grasses and in days, the grasses will start to dry off while the algae will form black patches on them. You also make any pet or kid which roams around the lawn susceptible to the toxin released by affected grasses.


On the other hand, if it is the algaecide that is in excess, your grasses will be affected too. Most algaecides contain copper sulfate as the main chemical which is dangerous to the state of grasses. In dissolved form, algaecide will decompose any grass it is poured on and make it lose more oxygen than required.


  • Salts in saltwater pools


Dealing with pool water and grasses

  • Sanitary sewer: If you intend to dispose of your pool water, it is advised you make use of your district Sanitary sewer to prevent any distortion or spillage. If your pool isn’t connected to the sewer, you can make use of the pump to channel the water into it. You shouldn’t consider using your lawn as a disposal ground for your pool. This will limit exposure to any risks that might be prompted by the chemical content of the swimming pool water to the grasses.


  • Safe irrigation: Aside from disposing of the water through a Sanitary stereo, if you intend to optimize the water, you can use it to irrigate the grasses. However, this will require you to get your pool water into good condition. You will have to test for the pH, chlorine content, Total Dissolved Solids (TDS), acidity, and alkalinity level. After being sure the pool water is alright, you are free to use it to irrigate the grasses. Be sure you don’t add too much water to the lawn in the act of trying to dispose of all the water in the pool.


  • Natural means of treating swimming pool water: Some natural methods of treating swimming pools water include using peroxide to neutralize free radicals; carbon filters to remove bad smells; reverse osmosis systems to remove salt; ultraviolet light systems to control algae growth; microporous structured Membranes (MSM) systems to filter out heavy metals like lead from the system naturally without adding more man-made chemicals into the system.

In addition, treating your swimming pool’s system using an ionic filter may help reduce noise pollution caused by swimmers underwater as well as reduce swimmers’ skin irritation from chlorine found in most treated pools. Natural methods tend to be much safer than using chemical treatments for treating your swimming pool’s system since they don’t harm any living things in that environment either.


Is Growing Grasses Around A Swimming Pool A Good Idea?

Yes, but artificial grasses are advised. They are designed not to slip like normal grasses when wet and wouldn’t be affected by water conditions.


Some popular grasses to have around your pool

  • Yellow foxtail grass
  • Giant reed
  • Lemongrass
  • Blue fescue
  • Fountain grass
  • Japanese blood grass



The ecosystem of grasses and the swimming pool match, only if the chemical composition of the water is in good condition.

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