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Question:

How bad is hard, tap water for cats?

Help! I'm really starting to worry about my cat, Whiskers. I've heard mixed things about giving cats tap water, and I don't want to be doing anything that might be harmful to him. We live in an area where the water is pretty hard, and I've noticed that his drinking habits have changed recently - he's been drinking less and seems uninterested in his water bowl. I don't know if it’s connected, and a friend mentioned something about hard water being bad for kitties. Am I overthinking this? Should I switch to filtered or bottled water? I just want him to be happy and healthy, but I don't know what to do. Has anyone else had similar experiences? Any advice would be super appreciated!

Answer:

Thanks for the question! It's great that you're thinking about your cat's hydration. Hard tap water, which contains higher levels of minerals like calcium and magnesium, is generally safe for cats to drink. However, some cats might be sensitive to these minerals, potentially leading to issues like urinary tract crystals or stones, particularly if there's a predisposition to such conditions.



For most cats, drinking hard water won't cause problems. If you notice your cat drinking less water than usual or showing signs of discomfort while urinating, it might be worth considering offering filtered or bottled water instead.



When providing hydration, ensure your cat always has access to fresh, clean water, as cats can be particular about cleanliness. Try using a stainless steel or ceramic bowl, which can help prevent odor and are easier to clean.



Watch for signs of a more serious issue, such as straining to urinate, blood in the urine, or frequent trips to the litter box with little or no urination. If you observe any of these, it's important to consult a vet promptly.



If you're concerned about your pet's water intake or urinary health, I recommend booking a video consult with one of our vets here at Dial A Vet. We can offer guidance tailored to your furry friend's needs.

Answered by

Louise - Senior Veterinary Nurse, Dial A Vet

June 24, 2025

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The "Ask a Vet" forum on Dial A Vet offers general information and helpful tips on pet health, but it's not a substitute for professional veterinary care. The advice here doesn't create a veterinarian-client-patient relationship, and our vets can't diagnose or treat your pet remotely. For emergencies or specific medical concerns, always contact your local veterinarian immediately. Your pet's health is unique, and decisions should only be made after consulting with a qualified professional. By using this forum, you acknowledge these limitations and agree to seek in-person veterinary advice for all your pet's health needs. View our content guidelines.
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