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.

How Often to Change Your Cat’s Water? Vet-Approved Care Tips

cat and orange bowl inside the house

We all know that cats need fresh water daily, but if you have a larger bowl that they don’t empty each day, how often do you need to change it out? The truth is that you need to give your cat fresh water every day, and if they don’t drink it all, you need to dump it out, clean the bowl, and then give them fresh water again.

But why do you need to swap out the water every day, and what can happen if you don’t?

divider 3 paws

How Often Should You Clean Your Cat’s Water and Food Bowls?

While you might not think much about your cat’s food and water bowls, that doesn’t keep bacteria from forming on them. Just like you don’t want to use a dirty bowl or cup for your meals, you shouldn’t expect your cat to use one either.

Because of this, you should clean their food and water bowls every single day. It might seem a little excessive, but there’s a reason you wash your dishes after each use, and your cat deserves the same thing!

Kitten drinking from a water bowl
Image Credit: PicksArt, Shutterstock

How Much Water Should Your Cat Drink?

The amount of water a cat drinks out of a traditional water bowl depends on the size of your cat and the type of cat food you feed them. If you feed your cat wet cat food, it contains 70 to 80% moisture, meaning it can give your cat a lot of the fluids that they need.

Overall, your cat needs about 4 ounces for every 5 pounds of body weight, meaning a 10-pound cat needs 8 ounces of water each day. But since your cat can get their water from their food or their water bowl, sometimes it can be hard to measure just how much water they’re getting.

Cats can be very particular about many things, including the water they drink. The right water fountain can provide your cat with clean, fresh water.

Hepper Stainless Steel Cat Water Fountain
  • Premium 304-Grade Stainless Steel - This metal cat water fountain is hygienic, with superior...
  • Serene & Healthy Cat Drinking Fountain Experience - With whisper-quiet pumping & an advanced...
  • Say Goodbye to Dehydration - Provide your cat with a constant source of flowing water with this...

We recommend Hepper's Stainless Steel Cat Water Fountain, an easy-to-clean model with three different flow modes, a large capacity, and effective triple filtration. This minimalist fountain runs quietly and will fit right into your home.

At Catster, we’ve admired Hepper for many years and decided to take a controlling ownership interest so that we could benefit from the outstanding designs of this cool cat company!

What Could Happen if You Don’t Change/Clean the Bowl Enough?

You need to take the time to clean your cat’s water bowl daily, and the reason for this all comes down to the inevitable contamination with food particles, dust and bacteria. If you’re not cleaning the bowl enough, your cat may become unwell from drinking water contaminated with bacteria.

Cats are also very fussy about the water they drink. If the water smells or tastes funky because it is not clean and fresh, they may drink less or not drink it at all. Not drinking enough water can also cause problems, for example putting cats at an increased risk of urinary tract issues.

How Often Should You Clean a Cat Water Fountain?

While you need to clean a traditional cat water bowl each day, if you have a fancier cat water fountain-style bowl, you likely don’t need to clean it quite as often as the water is moving and they generally contain filters. However, you still need to follow the manufacturer’s guidelines and on average clean it and replace the water at least once a week, but often every 3 to 4 days, even if the water in the bowl lasts longer than that.

These fountain-style bowls don’t collect bacteria as quickly as traditional bowls, but they don’t stay clean forever. When cleaning the bowl, dump out any water that’s still in the bowl and give them fresh water to prevent bacterial buildup. Be sure to follow guidance on how often to change and replace filters as well, which is usually every 4 weeks.

divider 3 paws

In Conclusion

Now that you know a little more about how often you should change your cat’s water bowl and why it’s so important, all that’s left is for you to take the time to clean it. It can be a pain to adjust to at first if you don’t normally clean them that often, but once you get into a rhythm, it only takes a few minutes each day, and it goes a long way in keeping your cat healthy and safe!

Related Reads:


Featured Image Credit: New Africa, Shutterstock

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.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

The Feline Grimace Scale: How it Works & FAQ (Vet Approved)

Cats are masters at hiding it when they’re not feeling well or in pain, which can make it difficult for pet parents to...

WaggleCam Pro Review 2025: A Detailed Look

With so many pet camera options available these days, you may be wondering what the best one is to keep tabs on your...

Can Cats Eat Liverwurst? Our Vet Answers & Explains

Feeding human cuisine to your cat is not always a wise decision, but how safe is liverwurst? Liverwurst, also known as liver sausage,...

Chinchilla Persian Cat Breed: Info, Pictures, Temperament & Traits

The Chinchilla Persian cat is essentially a Persian cat with a specific kind of coloring. Some believe that the Chinchilla is a separate...

More related

7 Best Designer Cat Beds of 2025 – Reviews & Top Picks

A cat bed provides a kitty with a safe and comfortable spot to rest and get away from any perceived threats, and it...

How to Hide Your Cat’s Litter Box: 12 Smart Solutions

There are many wonderful things about owning a cat, but keeping up with their litterbox is not one of them! While most people...

10 Cats With Mustaches in Honor of Movember (With Pictures)

“Movember” is an important annual campaign that promotes the growth of mustaches to support men’s health. It takes place throughout the month of...

Chonks: The Internet Craze That Promotes Unhealthy Cats (Vet-Reviewed Analysis)

If you were to open your Instagram account and mindlessly scroll through the media buffet, you would undoubtedly see pictures and videos of...

Keep reading

Why Does My Cat Hide and Sleep in the Closet? 9 Vet-Reviewed Reasons & Tips

Cats are fun pets, but they can exhibit many strange behaviors, one being hiding and sleeping in the closet. We know it can be alarming when your pet suddenly disappears, especially if you aren’t sure why your cat might be...

ginger cat hiding in the closet

Will a Cat Get Stressed Out if It Can’t Hide Anywhere? Vet-Approved Facts & FAQ

Have you ever been in a stressful situation you wish you could get away from? When you’re stuck with nowhere to go, stress levels increase, you feel flustered, and you simply don’t know where to turn. Now, imagine the same...

cat hiding

Is Aglaonema Toxic to Cats? Vet-Verified Houseplant Advice

House plants are a fantastic way to give your home some life, so much so that many people have taken up the role of plant parents, adorning their space with greenery. Aglaonema commutatum, also known as the Chinese evergreen plant,...

Catster_Is Aglaonema Toxic to Cats

Is Expired Cat Food Safe? Vet-Verified Info & Feeding Advice

Cat food can last a very long time, but what if it’s past its expiration date? Is it safe to feed your cat expired cat food? No, we don’t recommend you feed your cat expired cat food at all. Feeding...

Wet and dry pet food

Can Cats Eat Pine Nuts? Vet-Reviewed Facts & FAQ

There are many safe and unsafe human foods that you could feed your cat. For humans, nuts are famous for their health benefits. Pine nuts in particular are great for boosting energy levels and keeping skin healthy. But are they...

Can Cats Eat Pine Nuts

Hemp Oil vs CBD Oil for Cats: Is There a Difference? Our 2025 Vet-Reviewed Comparison

Making sure their feline is safe, happy, and healthy is the priority of every cat owner. Providing healthy food, a clean litter box, a safe home to play and sleep in, and regular veterinarian visits are all part of being...

Hemp vs CBD oil

Cat Eye Discharge (Boogers): Vet-Verified Facts & Care Advice

Have you ever noticed a watery, goopy, or crusty discharge around your cat’s eyes? While these cat eye boogers can be gross to look at and deal with, you mustn’t ignore them. This discharge may indicate a problem that requires...

cat with eye discharge

National Pet First Aid Awareness Month – How & When Is It Celebrated? (Vet-Approved)

National Pet First Aid Awareness Month may be something you’ve never heard of, but it is definitely something you should know about if you are a pet owner or you know a pet owner. Many people lack the knowledge of...

Cat with first aid kit