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

Share

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.

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

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.


Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

Ask Dr. Paola – Help! My Male Cat Gets Into Fights! (March 9, 2026)

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

Why Your Cat’s Poop Smells Like a Biohazard

Nobody enjoys litter box duty, but sometimes it gets unbearable. The smell hits you from across the room. You’re scooping faster, lighting candles,...

RIP Your Furniture? Not With This Guide to Cat Scratch Damage Control

Your couch looks like it survived a minor apocalypse. The curtains have mysterious vertical shreds. That new rug you splurged on is already...

Celebrating 15 Years as the Most Popular Resident of No. 10 Downing Street

For almost 300 years, a rather unassuming Georgian building of black bricks with a shiny black door has been the official residence and...

More related

Do Savannah Cats Like Water? Facts, Safety Tips & Info (Vet-Verified)

You might have heard that cats dislike water in the context of a bath, and for many cats, that’s true. But not all...

6 Pet-Friendly Hotels Near Laughlin, Nevada (2026 Update)

Fancy a trip to Vegas but want a little bit more to do than gamble? Try Laughlin! Laughlin isn’t the tourist destination Vegas...

11 DIY Cat Toys With Yarn You Can Create at Home (With Pictures)

If you love cats as much as you love to DIY, why not combine your two passions by crafting some DIY cat toys...

Fostering a Pregnant Cat: 9 Things to Know (Vet Approved)

Fostering any cat is a rewarding experience for you and for the cat. Taking on a pregnant cat does require more of a...

Keep reading

Why Is My Cat’s Third Eyelid Showing? 5 Vet Reviewed Reasons & Advice

Cats do not see the world in the same way that humans do. Their eye anatomy is different, and their eyes glow due to a reflective membrane at the back of their eyes that helps them see well in the...

Vet ophthalmologist examining a cat_s eyes with a slit lamp

7 Possible Signs Your Cat May Need a Feline Friend: Vet-Reviewed Introduction Tips & More

If only our pets could talk, we’d have a much easier time understanding their needs. Cats can be even more difficult to decipher than dogs. Their natural aloofness means we have to work twice as hard to figure out if...

cats reflection II_ OlenaPalaguta_Shutterstock

How to Get Your Cat to Use a Litter-Robot: 7 Tips & Tricks

Litter-Robots are a big deal for cat owners since they clean the cat’s litter, and the odor trap system keeps odors at bay! So, you’ve spent top dollar on this massive litter box and brought it home. But what if...

cat-using-litter-robot-4-black

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

Why Do Cats Eat Their Vomit? Cat Behavior Explained!

Cats can often display behavior that is utterly baffling to their human companions. A common cat behavior that people tend to find odd is eating vomit. Many people have seen their cats chowing down on a pile of food that...

Munchkin cat eating

Why Is My Cat Running Sideways? 7 Vet-Reviewed Reasons

Cats are fascinating pets and behind their every action, there is a myriad of reasons and impulses driving them. Cat’s sideways movement, often called “crab walking”, is no different and encompasses a variety of behaviors with similar movement patterns. Most...

cat running on green grass

Cat Urinary System: Vet-Verified Health Guide (With Diagram)

Cats’ urinary systems remove waste products, ensure proper electrolyte balance, and help with vitamin D processing. The urinary system has several organs, including the kidneys, bladder, urethra, and ureters, which run from the bladder to the kidneys. The urethra is...

cat coming out of a litter box

How to Prevent Hairballs in Cats: 4 Vet Approved Methods

There’s nothing like cleaning up a hairball to start your morning, and the ensuing cleanup is sure to leave a scowl on your face for the rest of the day. Luckily, preventing hairballs is simple, and it doesn’t take a...

cat hairball

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.