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.

Can Cats Drink Alkaline Water? Vet-Reviewed Nutritional Fatcs & FAQ

Can Cats Drink Alkaline Water

While alkaline water may have some health benefits, it should not be provided to felines. Alkaline water can harm a cat’s digestive system, so it should be avoided after they have eaten. In some cases, too much alkaline water can interfere with digestion.

However, cats don’t usually consume enough alkaline water for serious problems to occur. Your cat would have to drink only alkaline water for adverse effects to appear.

In other words, a little bit of alkaline water isn’t going to hurt most cats. Instead, they would have to drink mostly alkaline water for it to matter much.

Generally, we recommend a natural source of water that has not been tampered with. Tap water usually works as long as your water is safe to drink. If you aren’t under a boil warning, your tap water is perfectly safe for your feline to drink.

You may want to install a filter if your cat has underlying problems that require extra clean water. However, the filter should preferably not alter the pH, which needs to stay in a normal range.

divider 3 paws

What pH of Water Should Cats Drink?

Since cats don’t need alkaline water, what pH water do they need?

Preferably, cats need water in the normal range, which is around 6.3. However, cats aren’t picky about the pH in many cases. As long as it is around a 6, they are fine.

In the real world, cats are likely drinking water that ranges in pH. Therefore, even if they drink more alkaline water, it should balance out with the other water that they’re drinking. The problem arises when they only drink alkaline water, which might occur if their owner only provides bottled, alkaline water.

In those cases, the pH of the water would not balance out over time, eventually leading to severe problems. Anything outside the normal range can upset your cat’s digestive system pH. When this occurs, it may affect your cat’s ability to digest food normally. They may also experience other digestive problems, like stomach upset.

cat drinking water
Image Credit by: rihaij, Pixabay

What Happens if a Cat Drinks Alkaline Water?

If your cat only drinks a small amount of alkaline water, the odds are that they won’t be affected. While their system will not be used to the alkaline water, a small portion won’t make much of a splash.

However, problems will occur if your cat drinks too much alkaline water. Your cat’s digestive fluids may be affected if consumed in high amounts. They could become less acidic thanks to the alkaline water, which may, in turn, affect their ability to break down food.

In the short term, this is likely to cause digestive issues. Your cat may experience stomach pain and diarrhea. But, over time, malnutrition will occur. Your feline will be unable to digest their food correctly, and they won’t get the necessary nutrients.

Furthermore, the second your cat sips alkaline water, their stomach acid will likely become less acidic. Therefore, the food they eat during this time may not digest properly. Luckily, as long as they don’t drink too much, the problem should fix itself as the stomach acid becomes acidic once more.

However, you mustn’t provide alkaline water when your feline is eating. Their meal may not be adequately digested if they drink too much. In some cases, cats may refuse to eat since doing so may upset their stomach after drinking alkaline water.

Of course, being unable to digest their food may also cause lethargy, further making your cat unable to eat. Ultimately, this may leave you with a tired cat that refuses food, which would call for a trip to the vet.

Therefore, while you should pay attention to your cat’s water needs, there is no reason to seek out water of a particular pH. Instead, you should provide your cat with water within the normal range.

water bottles
Image Credit by: Hans, Pixabay

divider 1 paws

Is Tap Water Okay for Cats?

Your tap water is excellent for cats unless you live in an area with a boil water warning. It is a common misconception that bottled water is cleaner than tap water. As long as your home’s pipes are well cared for, the tap water you get from your faucet is probably the same as that from a bottle.

Tap water is often a bit healthier for your cat than bottled water, as it contains essential nutrients and minerals that not all bottled waters contain. While water usually contains these minerals in tiny amounts, they can be enough to cover any nutritional gaps your cat may be experiencing.

The CDC states that the United States tap water is extremely safe—one of the safest water systems in the world. All public water systems undergo regular testing and fall within the EPA’s safe range. Bottled water is held to the same standards. Therefore, while many companies may claim that bottled water is cleaner, it typically isn’t the case.

As long as the water is safe for you to drink, it is safe for your feline. In many cases, tap water is the best option for your cat since it doesn’t contain any pH differences and is as close to natural water as possible.

cat drinking from faucet
Image by: Sample Stars, Shutterstock

What Kind of Water Should Cats Drink?

Preferably, you want your cat’s water as clean as possible. Water with additives or alkaline water isn’t suitable. It may even cause health problems since it can affect the pH of your cat’s digestive system. We also do not know how added minerals and other ingredients may affect your feline.

Therefore, it is best to stick to filtered tap water when possible. You do not want to use distilled water since it is acidic and can cause stones.

divider 2 cats

Conclusion

While alkaline water may benefit people, you should avoid giving it to your feline regularly. Generally, water with too high of a pH can affect your cat’s digestive system and potentially raise the pH of their stomach acid, which can prevent them from digesting food.

Therefore, it is best to avoid alkaline water. Instead, your cat needs water at a pH of around 6, though slightly more plain water is fine. You want to give them water that has not had its pH changed for the most part.

Typically, tap water is excellent. It is the cheapest (and often the safest) option there is. As long as you can consume tap water, your feline can drink it.

Cats rarely need their water adjusted. However, if your cat has health problems, be sure to talk to a vet about their water. Sometimes,  minerals in the water can affect cats with underlying problems. However, the pH is typically not something that vets recommend adjusting.

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

See Also: 


Featured Image Credit: Food Impressions, 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 Grits? Vet-Reviewed Health Risks & Advice

Whether it’s because we’ve decided to give them a treat or because they’ve gotten into it themselves, our cats can eat quite a...

What Foods Are Toxic to Cats? 16 Everyday Items (Vet Reviewed)

Cats are different from dogs. Dogs will eat anything that touches the ground. But cats? They’re a bit pickier. Still, some cats are...

Do Cats Make Friends With Other Cats? Vet-Reviewed Feline Social Behavior

If you’ve ever brought home a new cat and you already own one, then you know how complex the introduction of the two...

How Long Can You Leave a Kitten Home Alone? Vet Approved Tips

Cats are known for their independence and can stay at home alone for a few hours as long as they have food and...

More related

Vets Warn About 10 Cat-to-Human Diseases (And How to Prevent Them)

At Catster, we love cats more than anything. Snuggles, headbutts, even those 3 a.m. zoomies. But even the most devoted cat lovers can...

How to Brush Out Matted Cat Fur: 6 Vet-Reviewed Steps

Matting can be stressful for the cat and the owner. Your cat will be unhappy and painful, and working through the tangles in...

Ask Dr. Paola – Food, Hiding & Coughing (November 24, 2025)

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

Can Cats Eat Thyme? Vet-Reviewed Facts

Cats are obligate carnivores, which means the vast majority of their dietary intake should come from meat and other animal-based ingredients. However, it...

Keep reading

How to Care For a 6-Month-Old Kitten: Vet-Verified Complete Guide

Kittens are typically curious, playful, feisty, and even mischievous. They are no longer tiny, fragile newborns, but they aren’t fully grown and matured either. It’s vital to understand the specific types of care that your kitty requires when they’re 6...

Bengal kitten playing

Are Tortoiseshell Cats Hypoallergenic? Vet-Approved Facts & FAQ

Between 10% and 20% of people globally are allergic to cats. If you suffer from cat allergy but can’t resist the charm of Tortoiseshell cats, you might wonder whether they are hypoallergenic. Unfortunately, no. Tortoiseshell cats are not hypoallergenic and...

a tortoiseshell cat sitting on a wood

Are Laser Pointers Bad for Cats? Vet-Approved Safety Information & Tips

Laser pointers are popular toys, and it can be fun watching your cat chase after that little red dot. But if you’re wondering whether laser pointers are safe for cats, the short answer is that laser pointers are controversial because...

Two cats are lying on the floor. Gray cats are playing with a laser pointer.

Kirkland Signature Cat Food Review of 2026: Recalls, Pros & Cons

Kirkland Signature Cat Food Review Summary Home to bulk bargain buys, Costco provides the ultimate warehouse shopping experience. And often you can find some of the best brand name goods and groceries for a great price. Costco also has its...

Kirkland Signature Cat Food Review

Can Cats Eat Quail Eggs? Vet-Approved Nutritional Benefits & Facts

As obligate carnivores, it’s no wonder that cats absolutely love any product that comes from an animal, including dairy! Of course, that doesn’t necessarily mean they can have these products, but they certainly will be attracted to them. You might...

Can Cats Eat Quail Eggs

Nutrisource Cat Food Review of 2026: Recalls, Pros & Cons

Review Summary Nutrisource is an all-American pet food brand, and they’ve been making pet foods in the same small town of Perham, Minnesota, for three generations, starting in 1964. Nutrisource produces several cat food formulas, and you can choose from...

NutriSource Cat Food Review

Do Oriental Shorthair Cats Shed? Breed Vet -Verified Facts & FAQ

Oriental Shorthair cats are sleek. They have almond-shaped eyes, flaring ears, and a short, fine-textured coat that lies close to the body. Orientals are considered one of the most allergy-friendly feline breeds, but do they shed? The answer is yes,...

close up oriental shorthair cat

Is it True That Cats Hate Aluminum Foil? 3 Vet-Reviewed Possible Reasons Why

As cat owners are well aware, cats are very opinionated animals. They have strong feelings about several aspects of their environment, and many feel the same way about aluminum foil. Most cats are not fans of aluminum foil, and some...

a roll of aluminum foil on countertop