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

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.

Our Favorite Cat Water Fountain

Making sure your cat drinks enough water can require a little creativity and the right fountain choice! A nicely made product like Hepper's Stainless Steel Cat Water Fountain will encourage your cat to stay hydrated by providing fresh, flowing water. We particularly like this model because it's easy to clean and offers excellent triple filtration, multiple flow modes, and a large capacity.

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...

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!

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

EveryCat Health Foundation Honored Recipient of Cat Writers’ Association Annual Fundraiser in 2024

EveryCat Health Foundation has been honored with the November 10th Donation Award from the Cat Writers’ Association, in conjunction with the CWA’s 30th...

10 Pet-Friendly Hotels in Indianapolis (2026 Update)

No matter whether you are traveling for business or pleasure, finding a fantastic place to stay can enrich the entire experience. This is...

Can Cats Eat Meatballs? Vet-Reviewed Dangers & Facts

Spaghetti and meatballs are a classic comfort food and a childhood favorite meal for many people. If you and your family regularly enjoy...

How to Syringe Feed a Kitten: 5 Vet-Approved Steps & Safety Guide

In some cases, syringe feeding a kitten may be necessary, and while this form of feeding isn’t the best, it is the only...

More related

8 Best Modern Cat Beds in 2026 – Reviews & Top Picks

Throughout history, people have lavished all kinds of luxuries on their pets, from treats to clothing and food fit for a king! King...

Can Cats Drink Coconut Water? Vet-Verified Nutrition Facts & FAQ

Coconut water is the clear liquid that is found inside young coconuts. It is packed with electrolytes and is known to offer benefits...

Arthritis in Cats – Vet Approved Causes, Signs & Treatments

If your cat seems a little less sprightly and active than usual, it can be a cause for concern. Some health issues could...

Ask Dr. Paola – Rubbing, Heart Failure & Eye Rolling (August 25, 2025)

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

Does Cedarwood Oil Kill Fleas on Cats? Vet-Verified Effectiveness & Safety Explained

Fleas can be the bane of a cat owner’s existence. Once they appear, they’re everywhere, and worst of all, they make our kitties miserable. Getting rid of fleas can be an arduous task. While plenty of flea control and prevention...

cedar chips and essential oil

6 Best Foods for Bengals Cats in 2026 – Reviews & Top Picks

As a cat owner, you want your kitty to have the best food possible. You need food that suits your cat’s needs and want to ensure they’ll be happy eating it. After all, if your cat is turning their nose...

Bengal cat eating canned food

Why Is My Cat Scratching at the Window? 5 Reasons & How To Stop Them

A cat scratching the window can be irritating, especially if it happens constantly during the day or at night when you are trying to sleep. Cats may scratch at windows for a variety of reasons, from wanting to reach prey...

Black and white cat pawing at the window

Why Are My Cats Fighting All of a Sudden? 5 Vet-Approved Reasons & Tips

There is something so disheartening about two best pals turning into enemies. If your cats have always gotten along but seem to be at each other’s throats all the time now, you know there has to be a reason. Sometimes,...

cats fighting

How to Give Your Cat a Massage: 11 Vet-Approved Tips & FAQ

When we want to pamper and treat ourselves, we book a 45 or 60-minute massage with our favorite masseuse. But have you ever wondered what your cat could do to relax? While massages aren’t known to relax cats in the...

Massage of the cat's hind leg

When to Switch From Kitten Food to Cat Food? Vet-Reviewed Facts & FAQ

Cats, like people, have different nutritional and dietary requirements at different stages of life. Kittens have seemingly boundless energy, and they need to consume the nutrients to match this. When they cross into adulthood, they will be burning off a...

little kitten sitting by a bowl of milk

Can Cats Eat Oats? Vet-Verified Nutritional Facts & FAQ

Oats are commonly praised as nutritious for us to have for breakfast. Full of fiber, oatmeal fills us up and starts the day off right. It’s beneficial for us, but can cats have oats? Cats can eat oats, but it’s...

Can Cats Eat Oats

Why Is My Cat So Affectionate in the Morning? Vet-Verified Facts & FAQ

It isn’t odd to hear about cats trying to keep their owner in bed later for extra cuddles. Even cats that aren’t typically affectionate may want to cuddle in the morning. This often raises the question as to why cats...

cat curling on bed