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.

Need veterinary advice but can't get to the clinic? Catster recommends PangoVet, our online veterinary service. Talk to a vet online and get the answers and advice you need for your cat without having to leave your living room — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money

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.


Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

72 Dead – Another Nail in the Coffin of Tiger Tourism

Graceful, fearsome, and powerful, the majestic tiger may not be the “king of the jungle” but perhaps should enjoy the position of queen....

Ask Dr. Paola – Help! My Cat is Dependant on Treats! (March 16, 2026)

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

What Feral Cats Actually Need From the People Who Feed Them

Feral cats are everywhere. Slipping between parked cars, darting under porches, appearing briefly at dusk before vanishing again. Most people see them, feel...

Capturing Catstanbul

Istanbul – famous for its bustling markets, unique architecture, and vibrant culture, there is one more feature of this Mediterranean capital that deserves...

More related

10 Best Blacklights for Finding Cat Urine Stains in 2026 – Reviews & Top Picks

Cat pee is one of the most invasive smells in the world. One of the only ways to eliminate the lingering smell of...

Is It True That Most Cats Have Green Eyes? Vet-Reviewed Facts & FAQ

Eyes may be the window to the soul, but in cats, those windows come in many colors. If you’ve ever wondered if it’s...

What is a Dilute Calico Cat? Vet Verified Facts (With Pictures)

Most people have heard of calico cats, though not everyone knows what they are. These rare cats are exceptionally beautiful, which is the...

Are Orchids Toxic to Cats? Vet Approved Advice

Some houseplants are poisonous to cats. If you want to have a house full of greenery but also have cats, it’s essential to...

Keep reading

Why Do Cats Show You Their Butt? 6 Vet-Reviewed Reasons

Although cats have lived with humans for millennia, they still do many things that leave us feeling puzzled or confused. One behavior that can surprise or shock new cat owners is a cat’s tendency to show their butt when they...

black cat enjoying when owner scratch at the base of his tail showing the butt

My Cat Makes Weird Noises When Drinking: 6 Vet-Verified Explanations

Are you worried that your cat has an odd way of drinking water? You’re not alone in this thought process. It’s a common question for cat owners, and usually, it’s nothing you need to worry about. Still, you’re probably just...

cat drinking water from bowl in carpet

Cat Dandruff: Vet-Verified Signs, Causes & Care

If you ever notice white flakes on your cat’s fur or skin, you could find yourself wondering if it could be cat dandruff. Dandruff is very common in humans, but can cats get dandruff? Is dandruff a minor condition in...

cat fur with dandruff

My Cat Just Threw Up, What Should I Do? (6 Vet-Approved Treatment Tips)

Vomiting is common in all cats, but excessive throwing up is not normal. If your cat is throwing up excessively every few weeks, you should take them to a vet as soon as possible. However, if this is your cat’s...

Cat vomiting

Indoor vs. Outdoor Cat Food: Vet-Reviewed Nutritional Differences

You’ve probably stood in the cat food aisle of your local grocery or pet store and marveled at the sheer number of options available. There is seemingly a special type of cat food for every cat out there. There are...

outdoor vs indoor cat food

Can Cats Eat Applesauce? Vet-Reviewed Facts & Considerations

Applesauce is considered safe for kids and adults, but is applesauce safe for cats? The short answer is that while it is safe to give applesauce to cats in small amounts, there are many things to consider before you do...

Can Cats Eat Applesauce

Why Is My Cat Drooling Thick Saliva? 12 Vet-Reviewed Reasons & Treatment

Cats are fascinating creatures, often leaving us in awe with their peculiar habits and quirky behaviors. However, as a cat owner, you might be alarmed to see thick saliva dripping from your feline’s mouth, making you wonder if it’s a...

Orange cat drooling

Why Does My Cat Bite My Feet? 6 Vet-Approved Reasons for This Behavior

As cat owners, we know that the price of being owned by a cat also means dealing with a lot of crazy and inexplicable behavior. But this is why we love our cats. Chances are, at some point in time,...

cat biting man's foot

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.