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

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

Can Cats Eat Fritos? Vet-Approved Alternatives & Risks

Our cats love getting into all kinds of goodies in the home. Fritos might be an odd request for most cats, but some...

Chocolate Point Siamese Cat: Info, Pictures, Traits & More

The Chocolate Point Siamese cat is a beautiful, sleek feline that has a cream-colored body with chocolate markings of varying degrees. They are...

How to Tell Cat Gender By Face? 3 Vet-Approved Ways

Male and female cats can have physical and behavioral differences. Additionally, each faces its own unique health challenges, which can make it essential...

10 Best Cat Carriers in 2026 – Reviews & Top Picks

Traveling with your cat can be stressful, especially if your cat has high anxiety while traveling. When you have to load up your...

More related

How to Care for Hairless Cats: Vet-Approved Tips & Guide

Hairless cats are a real eye catcher for most people. Even people who aren’t too cat crazy might be mesmerized by the odd...

“Cats”: Behind the Scenes at Andrew Lloyd Webber’s Musical

Despite being a tried and true cat lover, until last week, I had never seen Andrew Lloyd Webber’s famous Cats musical. So when...

Creating Outdoor Spaces for Indoor Cats: Dr Karyn’s Catio (with Video)

Hi, I’m Dr. Karyn! Read my introduction to learn more about me and meet my five hilarious cats: Clutch, Cyril, Alex, Zelda, and...

Colitis in Cats: Our Vet Explains Signs, Diagnosis & Treatment

Taking care of a cat experiencing gastrointestinal symptoms can be quite an ordeal and cause a significant amount of stress for both you...

Keep reading

10 Vet-Reviewed Facts About Cats’ Teeth: Feline Anatomy Explained

Your cat’s teeth are important tools that they need for eating and fighting, but they are also quite small and surprisingly delicate, and many felines suffer from dental disease later in life. If you are looking to learn all that...

close up of cat's teeth

Why Do Cats Chatter at Birds? 5 Possible Reasons & FAQ

Cats are vocally gifted and can produce up to 21 distinct vocalizations.1 Although cat owners are accustomed to their pets meowing, they may be baffled by their chattering. Chattering is a unique sound that cats make after seeing prey, such...

cat and bird

Safe Toys for Cats: Vet-Approved Options & What to Avoid

Providing toys for your kitty to play with is a non-negotiable part of cat ownership. They need to play not only for mental and physical stimulation but also to enforce good behavior and prevent behavioral issues. However, not all toys...

Cat playing fetch with ball

How to Switch Vets: 13 Vet-Reviewed Signs It’s Time

Your pet is a vital part of your family, and no one knows them better than you—except maybe your vet. Even if you only take your animal to the vet once a year or so, your pet’s vet knows a...

woman brought her maine coon cat to the vet

How to Keep Cats Cool in Summer Without Air Conditioning: Vet-Reviewed Tips & Tricks

Summer is fun since the sun is scorching. But when the humidity goes high, then it ceases to be fun. The sun affects pets, and this is not limited to cats. The heat is as uncomfortable for them as it...

Adult-ragdoll-cat-lying-relaxed-in-the-garden

How Do Cats Grieve? The 7 Vet-Reviewed Ways They Show Mourning

Any cat owner knows that cats are interesting and peculiar creatures. Most march to the beat of their own drum, and sometimes, it’s hard to decipher a cat’s feelings and emotions. Cats are masters of hiding when they’re sick, but...

sad, bored or sick cat

I & Love & You Cat Food Review in 2026: Recalls, Pros & Cons

Review Summary I and Love and You cat food has been making waves in the pet food industry for the past several years. Their adorable packaging has likely caught your eye a few times. If you’re wondering what this brand...

I and Love You Cat Food Review

My Older Cat Is Losing Weight: 10 Vet-Reviewed Reasons

​​The average feline lifespan has increased over the years, and today, it’s not uncommon to meet cats that are 18, 19, 20, and even 20+ years old! And while they are considered “seniors” at the ripe old age of 11-14...

sick skinny cat in the veterinary clinic