Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Best Waters for Cats: 6 Vet-Reviewed Types & FAQ

Share

cat drinks water

Although cats aren’t known to lap up a bowl of water like dogs, they need to remain hydrated, and it is also crucial for their water to be clean and fresh. There are a few sources of water and different ways it is treated, and it makes a difference to the health of our fur babies, so which water is best? In this article, we’ll go through the six best waters you can safely give your cat to keep them optimally hydrated! Let’s have a look.

divider 3 paws

The 6 Best Types of Water for Cats

1.  Spring Water

Natural spring water is one of the best and most natural water sources for your cat. It comes from groundwater, and as it naturally flows to the surface of the ground, it is collected at the opening of the spring. It is considered pre-purified because it has traveled through natural filters like clay, sandstone, and limestone.

Once spring water is collected, it is analyzed to ensure that it meets the standards of the Environmental Protection Agency (EPA) and the Food and Drug Administration (FDA) before it is bottled and sold.

tabby cat sitting next to a bowl of water
Image Credit: Impact Photography, Shutterstock

2. Filtered Water

Filtered water has been filtered after coming out of your tap at home. It can be purified using a filter attachment on your sink or a jug with a built-in filter. Filtered water is one of the cheapest, easiest, and most convenient ways to ensure your cat gets clean water. Filters remove impurities and debris to make the water safe and healthy for your cat to drink.


3. Mineral Water

cat drinking water from fountain
Image Credit: Daria Kulkova, Shutterstock

Mineral water comes from an underground source and is typically bottled directly when it’s obtained. It contains at least 250 parts per million total dissolved solids and it retains the natural minerals from the underground source.

Some mineral waters are carbonated, which can add to their refreshing qualities. However, cats should only drink plain mineral water without added carbon dioxide gas.

Mineral water contains minerals and gasses like:
  • Magnesium
  • Calcium
  • Sodium
  • Iron

4. Alkaline Water

Alkaline water is water to which ions have been added to increase its pH to around 8 to 9 on the scale. The pH of regular water is approximately 6.5 to 7. Several health benefits for humans have been claimed; however, there is no scientific evidence that this type of water provides such benefits, and even less is known about its effects on cats.

Benefits of alkaline water include:
  • Immune system support
  • Colon-cleansing
  • Cancer resistance
  • Detoxifying properties

5. Reverse Osmosis System Water

The reverse osmosis system removes sediment, chloride, and dissolved solids. It results in up to 98% of dissolved solids removed, which makes it one of the healthier types of water for your cat to drink. It can easily be installed under your sink at home and is more environmentally friendly than bottled water.

It is one of the best waters you can give to your cat because the process filters out any contaminants without adding other chemicals to the water.

bengal cat with a bowl of water
Image Credit: kalyanby, Shutterstock

6. Tap Water

Tap water is the simplest solution, and it can generally be a trusted source of water since it is regulated and checked to ensure it is safe for human consumption. However, you must ensure that your tap water is of the best quality for your cat. If you won’t drink it, your cat shouldn’t.

divider 3 paws

Frequently Asked Questions (FAQ)

Can Cats Drink Carbonated Water?

Carbonated or fizzy water is unsuitable for cats, as it may cause gastric upset. Your cat may even vomit or experience diarrhea, so keeping carbonated water out of their bowl is best.

Is Vitamin or Smart Water Good for Cats?

Vitamin water is made up of water with added vitamins and minerals. Cats should stick to drinking plain water; however, if your cat has a few sips, it should not harm them. If you feel your cat could benefit from vitamin water, you should speak to a vet for professional advice.

Is “Dirty Water” Safe for Cats?

It’s not uncommon to see your cat drinking from a puddle, the bath, a potted plant, the pond, and the toilet! This is often because they are curious or dissatisfied with the size and shape of their water bowl, the freshness of the water, or the bowl’s position. If the water hasn’t been circulating, it is stagnant and has a high chance of harboring bacteria and contaminants that can harm your cat. Some puddles may include harmful substances that you are unaware of, so you should try to keep your cat away from stagnant water sources.

Ponds and lakes often contain algae that can be toxic to your cat, and pool water contains chlorine, which can dehydrate your pet. The toilet bowl can be contaminated with cleaning agents, leading to health issues if your cat drinks it often.

How Much Water Should My Cat Drink?

Your cat’s water requirements depend on their age, diet, health situation, activity levels, and climate. Generally, cats should drink 4 ounces of water for every 5 pounds of body weight per day. Therefore, a 10-pound cat will need a cup of water daily. The most important thing is that your cat’s water is clean. The best thing to do is ensure that your cat has access to clean, fresh water daily by refreshing the water several times or buying a cat water fountain.

divider 3 paws

Conclusion

When it comes to your cat’s hydration, the water quality is very important to their health. Your pet must have clean, fresh water that’s free of chemicals and contaminants. Spring water and filtered tap water are the better options, and you can easily add a filter to your tap for the easiest and most convenient water source. Purchasing bottled water can be very wasteful and expensive. You should also ensure you find the best way to give your cat water, whether with multiple bowls or a water fountain. This will ensure your cat doesn’t choose unsuitable water sources over the water bowl.

See Also:


Featured Image Credit: AltamashUrooj, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.




How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.


Catster's Digital Magazine is Back!

Vet-approved health & behavior advice

Real cat stories & community features

Chatting About the Importance of Spaying/Neutering, Cat Retail Shopping Ban & Red-Level Storms | Chatty Cattys, Episode 30

In this episode of Catster’s Chatty Cattys podcast, Nicole and Dr. Karyn are celebrating a major legal win for pets before diving into...

Is Your Cat Happy? Here’s How You Can Tell

Cats have a reputation for being indifferent, even inscrutable. But despite their seemingly ambivalent appearance, cats experience many emotions, including happiness, and they...

Human Brains Age Like Cats – New Study Debunks the 7-Year Rule

If you’ve ever caught your senior cat staring blankly at a wall, wandering the halls at 3 am, calling out for no clear...

Chatting with Devin About Here! Have a Kitten, Fostering, & Why Two Are Better Than One | Chatty Cattys, Episode 29

In this episode of Catster’s Chatty Cattys podcast, Nicole & Dr. Karyn sit down with Devin, the founder and one-woman show behind “Here...

More related

Siamese Kittens for Sale in Tennessee: Breeders List 2026

Catster advocates for adopting before shopping, though we fully understand there are many reasons for seeking a breeder. So, we encourage it to...

Can Cats Sweat? Vet-Reviewed Facts & FAQ

Every year as summer approaches, many pet owners wonder if their cats can sweat to stay cool and what they should be doing...

Can Cats Eat Spam? Our Vet Answers & Explains

Spam, stylized as SPAM, is a brand of processed canned meat (originally pork and ham) made by Hormel Foods Corporation. The term SPAM...

Ask Dr. Paola – Eye Gunk, Dental Care & Pupils (January 5, 2026)

Welcome to our “Ask Dr. Paola” series, where every Monday we bring expert advice straight from Dr. Paola Cuevas (MVZ) to help our...

Keep reading

Why Does My Cat Go into Another Room and Meow? 9 Vet-Reviewed Reasons

Cats meow as a means of communication with others, with us, and to express their internal states, which can make us think that they’re trying to let us know something when they leave the room to meow. The question is,...

cat meowing

Can You Catch a Cold From a Cat? Vet-Verified Facts & Info

Once cold and flu season hits, most people find themselves feeling pretty crummy at some point. As soon as one person in the household goes down with a fall or winter cold, it seems like only a matter of time...

teenager cat owner cuddling with pet cat

Why Did My Cat Stop Sleeping With Me? 8 Possible Reasons & What to Do

Do you ever wonder why your cat stopped sleeping with you? It’s a question that has puzzled cat owners for years. There are many reasons this might happen, but there are also some unexpected reasons you might not have considered....

Cat sleeping

IMHA in Cats: Signs, Causes & Care (Vet-Reviewed)

IMHA, or immune-mediated hemolytic anemia, describes a condition where the immune system misfires and breaks down the body’s red blood cells, a process called hemolysis. You may see it called autoimmune hemolytic anemia (AIHA) as well. The body inappropriately attacks...

veterinary-blood-test

Why Does My Cat Carry Around a Toy and Meow? Cat Behavior Explained (Vet-Reviewed)

If you have a cat who likes to carry around their toy and meow, you are probably wondering what’s up with this strange behavior. Cats can do curious things, and this might be one of them! Should you shrug it...

Ginger kitten with white chest

10 Best Cat Shampoos in the UK in 2026 – Reviews & Top Picks

Cats are generally very clean animals that spend a ton of time cleaning and grooming themselves. However, whether your cat is old, has mobility issues, or has managed to roll in muck or dirt, it might be necessary to give...

cat wearing a towel after a bath

The History of Commercial Pet Food: Invention & Timeline

Most cats and dogs today eat commercial pet food, but when was pet food invented, and at what point did it become popular? Dry biscuits for dogs were first sold around 1860 in the UK and were the creation of...

Why Is My Cat Suddenly a Picky Eater? 7 Vet-Reviewed Reasons

Cats are known to be relatively pickier than most animals out there. In a way, this helps them stay alive. They aren’t prone to eating things that they shouldn’t (usually), which would help them stay alive in a natural setting....

cat not eating

Love Cats? So Do We! Join the Catster Community

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.




Sign up for the Catster Email Newsletter

Stay informed with expert pet care insights delivered straight to your inbox! Discover professional guidance on animal behavior, feeding tips, trusted product picks, and much more.