Does Ammonia Kill Fleas? The Truth Revealed!

Many homeowners with pets often wonder if ammonia is an effective flea killer. Fleas are a common problem faced by pet owners as these pests can infest not only your pets but also your home. Fleas can cause itching and discomfort in pets and can also transmit diseases. In this article, we will explore whether ammonia is an effective flea killer or not!

What is Ammonia?

Ammonia is a colourless gas that is commonly used in household cleaning products. It has a pungent odour and is highly soluble in water. Ammonia is also used in the production of fertilisers, plastics, and other industrial products. If you have ever used a cleaning product that has a pungent smell, chances are it has ammonia in it.

How Does Ammonia Kill Fleas?

Ammonia works by altering the pH of the flea’s environment, making it uninhabitable for them. Fleas thrive in environments with a pH between 7.0 and 8.5, which is slightly alkaline. The high pH of ammonia disrupts the flea’s acid-base balance, causing them to dehydrate and die. This is why some homeowners use ammonia as a flea killer.

Is Ammonia Safe for Pets?

While ammonia can be an effective flea killer, it is not safe to use around pets. Inhaling ammonia fumes can irritate your pet’s respiratory system, eyes, and nose. Pets with respiratory problems such as asthma can have severe reactions to ammonia fumes. It can also cause chemical burns on your pet’s paws and skin. Therefore, it is not recommended to use ammonia as a flea killer around pets.

How to Use Ammonia to Kill Fleas?

If you decide to use ammonia to kill fleas, it is important to take necessary precautions to protect yourself and your pets. Firstly, you should ensure that your pets are not in the room when you are using ammonia. You should also wear rubber gloves, a mask, and goggles when handling ammonia. Here are some steps to use ammonia effectively to kill fleas:

  • Mix one cup of ammonia with one gallon of water.
  • Use a spray bottle to spray the solution directly onto infested areas such as carpets, rugs, and upholstery.
  • Leave the solution on the surfaces for at least 30 minutes.
  • Vacuum the treated areas thoroughly, and dispose of the vacuum bag immediately.
  • Repeat the process every three days until the flea infestation is eliminated.

Are There Any Alternatives to Using Ammonia to Kill Fleas?

There is no doubt that flea infestations can be frustrating and challenging to get rid of. While ammonia can be effective in killing fleas, it is not safe to use around pets. Fortunately, there are many safer and more effective alternatives to kill fleas without harming your pets. Here are some alternatives to using ammonia to kill fleas:

  • Diatomaceous Earth: Diatomaceous earth is a natural and safe alternative to using chemicals to kill fleas. It is a fine powder made from the fossilised remains of diatoms, a type of algae. When diatomaceous earth comes into contact with fleas, it absorbs the oils from their exoskeleton, causing them to dehydrate and die.
  • Salt: Salt can also be an effective flea killer. Sprinkle table salt on your carpets, and leave it for a day or two before vacuuming it up.
  • Cedar Oil: Cedar oil is another natural flea repellent. It is safe for pets and can be used in a spray bottle to repel and kill fleas.


While ammonia can be an effective flea killer, it is not safe to use around pets. There are many safer and more effective alternatives to killing fleas. As a pet owner, it is important to choose flea-killing products that are safe for your pets and your family.


  • Will ammonia kill flea eggs and larvae?
  • Ammonia cannot kill flea eggs and larvae, only adult fleas.

  • Can I use vinegar instead of ammonia to kill fleas?
  • Vinegar can be used as a natural flea repellent, but it is not effective in killing fleas.

  • Can I use ammonia to kill fleas outdoors?
  • Ammonia can be used to kill fleas outdoors, but it is not recommended as it can harm other animals and insects in the area.

  • Can I use ammonia to treat flea bites?
  • No, ammonia cannot be used to treat flea bites. Applying cold compresses to the affected area and applying calamine lotion can provide relief from flea bites. Seek medical attention if you experience an allergic reaction to flea bites.



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