Best Cat Water Fountains of 2026: High-Tech Hydration

Capacity

A pet water fountain doesn’t have to be huge, but larger models tend to be easier to maintain, staying full and clean for longer periods of time. Look for fountains that can hold around two liters of water if possible.

Noise

You’d be surprised how much a small trickle of water in the room can get on your nerves, especially if you’ve never had an indoor fountain before. It tends to sound like a toilet that won’t shut off or a faucet that was left on. It’s a good idea to glance at reviews or testing to see if anyone is complaining about the noise. The best fountains offer smooth, flowing water that doesn’t have much, if any, sound.

Filtration and filter cost

These fountains all have some type of filtration that you’ll need to replace every few weeks to few months, depending on the design. If you’re worried about costs, take a look at filter packs and make sure they are in your budget. You really don’t want to skip on filters for drinking water. Most tend to cost around $10 or so for a pack that can last six months to a year.

Filters and fountains tend to last much longer if you use filtered water or softened water in the tank, although this may also cost extra.

Portable vs. plug-in

Some of these cat fountains are portable, which means they have rechargeable batteries so you can move them around. That’s a big advantage for certain homes, where cats may have a favorite drinking spot they do not want to deviate from, far away from any outlets.

How easy it is to clean

I won’t sugarcoat things: These fountains are almost always a pain to clean, no matter their designs. It’s easy for dirt, algae and goop to get stuck in the smallest places and can be hard to remove this gunk completely, even with vigilance.

The best answers to this problem are units with very simple designs and no tiny crevices, as well as fountains that are easy to dissemble and dishwasher-ready if possible. The good news is that regular cleaning also gives you frequent opportunities to check and replace filters.

App controls and alerts

Think about what kind of app alerts you may want from a cat fountain, if any. Some fountains may give you alerts about when they’re used, for example, so you can make sure your cat is getting enough water. Others may let you control the fountain from afar, turning it on or off when you want. Some offer reminders about when to replace filters, too.

Sensors, schedules and timers

Extra sensors aren’t usually necessary on these fountains, but they may help. Proximity sensors can turn on when pets approach, which can either encourage them or startle them, based on the cat. Others may let you set timers for when the fountain is on, so you can turn it off at night when it’s noisy. Or you can use a smart plug, which I’ve done in the past. Cat fountains don’t really have smart voice assistant support, but smart plugs are an easy way to give them this capability.