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Why are there worms in my pool after it rains?

Author

William Rodriguez

Published Jan 10, 2026

Actually, they come out after rains because the water allows them to easily move above ground. Worms breathe through their skin, and their skin needs to be wet or moist in order for that to work. Basically, it rains and worms shout “road trip.”

Why do I get worms in my swimming pool?

Worms normally live in dirt, and hard rain can draw them out of the ground. As they try to get out of the rain, they could end up in the pool accidentally if the dirt and plants are too close to the pool water.

How do I get rid of worms in my swimming pool?

Let's take a look at a few strategies you can use to reduce or eliminate your pool worm problem once and for all.

  1. Use a Solar Pool Cover. ...
  2. Check Your Pool After a Storm. ...
  3. Move Your Landscaping. ...
  4. Elevate Your Deck. ...
  5. Crushed Limestone. ...
  6. If All Else Fails, Insecticide.

What kind of worms are in my pool?

Unless they are a earthworm that accidentally fell into pool, the worms are most likely horsehair or Gordian worms, which are parasites that develop in the bodies of grasshoppers, cockroaches, beetles and crickets. Although they are harmless, most pool lovers will want to remove the creatures.

How do I get rid of worms in my above ground pool?

Use A Skimmer Net

This will be the easiest way to get them out of your pool. You can use your skimmer net to scoop them off the surface of the water. A leaf net also works, especially if you need to scoop the worms at deeper depths, or off the floor of the pool.

38 related questions found

How do you get rid of worms when it rains?

Having too many worms in one place can be a problem, though. To prevent this scenario, you can try using landscaping bricks, a shovel, garden fabric, a leaf sweeper and/or a rake. Landscaping bricks can be used to edge sidewalks and patios, blocking off the earthworms' access.

Can you swim in a pool with worms?

Threadworms are a common, non-fatal parasite that can live in the human small intestine. It is unusual in developed countries where the water and soil are not contaminated with fecal matter. If you do contract threadworms, avoid swimming because you may contaminate the water.

How do I keep millipedes out of my pool?

Minimize moisture, remove debris - The most effective, long-term measure for reducing entry of millipedes (and many other pests) is to reduce excess moisture and hiding places, especially near the foundation.

What kills millipedes instantly?

The easiest and quickest way to get rid of millipedes in the house is to remove them with a vacuum cleaner or shop-vac or to spot treat them with an effective plant-based insecticide, like Maggie's Farm Home Bug Spray. Maggie's Farm Home Bug Spray will kill these bugs when you spray them directly with it.

What kills millipedes outside?

Diatomaceous Earth (DE)

Diatomaceous earth is a crystalline powder substance that can be used for a variety of pests. The crystals in this natural product pierce the hard exoskeletons of pests, causing micropunctures all over their bodies. This then dehydrates and slowly kills the pests over time.

What causes a millipede infestation?

Excess rain, drought, and cooler temperatures can make their outdoor habitats less favorable for them and you will often see millipedes in the house during these conditions. Excess rain will drive them indoors in search of shelter and drought will drive them indoors in search of water.

Can you get pinworms from pool water?

Although chlorine levels found in pools are not high enough to kill pinworm eggs, the presence of a small number of pinworm eggs in thousands of gallons of water (the amount typically found in pools) makes the chance of infection unlikely.

Why do earthworms come out in rainy season?

When the rain hits the ground it creates vibrations on the soil surface. This causes earthworms to come out of their burrows to the surface. Earthworms find it easier to travel across the surface of the soil when it is wet, as they need a moist environment to survive.

What are the worms in rain water?

Horsehair worms are aquatic worms that live in damp soil, puddles, or other bodies of fresh water. They are commonly seen after rain. They may look off-putting to some, but Dr. Fassbender said they are harmless to humans and pets, and they are actually good for the environment.

What is rain worm?

Definition of rainworm

1 : earthworm. 2 : an adult mermithid worm.

Why do worms go on concrete?

Oxygen diffuses about a thousand times slower through water than through air, she says. “The worms can't get enough oxygen when the soil is flooded, so they come to the surface to breathe.”

Why do I have so many worms in my yard?

So, why are there so many worms in my yard? Worms are attracted to healthy soil that contains high levels of organic materials. Having earthworms in your yard simply means that your soil is healthy and supports life of all kinds. In fact, any yard that is properly maintained should have its fair share of worms!

Why do worms crawl on concrete when it rains?

As worms breath through their skin, they can breath the oxygen in water, rather like a fish does. Scientists now believe the worms take advantage of the wetness to migrate. As they need that moisture to move across barriers such as cement sidewalks and curbs, the rain provides a slick runway for them.

What is the fastest way to get rid of pinworms?

Pinworms can usually be treated completely with two doses of over-the-counter medicine called pyrantel pamoate, available in the United States under the brand names Pin-X and Reese's Pinworm Medicine. Take one dose immediately and another dose two weeks later.

Do pinworms go away?

Pinworm infections are easy to treat, and the pinworms go away. Because the pinworm infection is so highly contagious, it is not unusual for infections to recur.

What does a chlorine rash look like?

Chlorine rash symptoms can include: dry or chapped skin that may grow worse with repeated exposure to chlorine. itchy, red, swollen, or scaly patches of skin. burning, stinging, or itching skin.

Why do millipedes come out after rain?

They move out of their normal habitat. Scientists suspect they may be trying to get ready for winter. However, millipedes have also been seen migrating after a heavy rain has flooded their habitat. During these migrations, millipedes often find their way into homes.

Where are these millipedes coming from?

If the conditions outside become too hot, dry, or wet from heavy rain, they will sometimes find their way into your home, seeking shelter. Indoors: Millipedes are attracted to cool, damp places like the basement, crawl spaces, or the garage.

Can millipedes hurt you?

To date, there are over 12,000 known living species of millipedes worldwide. None of these are documented to be poisonous to humans. A millipede also won't bite you, but the toxins of some species can cause skin symptoms when you handle them.

How do you stop millipedes from coming inside?

MILLIPEDE PREVENTION TIPS

  1. Turn off external lights and use curtains / blinds during millipede season to make your home less attractive.
  2. Consider using a light trap away from the house as an alternative light source to attract and kill the millipedes.