When you’re thirsty, it’s easy to grab water from whatever source is closest. But not all water is created equal—especially not when you’re putting it in your body.

Before you reach for yet another plastic bottle, consider these four reasons why you should make the switch to filtered water:

1. It’s free of harmful contaminants.
One of the most important reasons to drink filtered water is a simple one—it’s good for your body. Water filter systems are designed to remove potentially harmful contaminants from your water supply, like chlorine, fluoride, aluminum, and even arsenic.

While tap water is monitored and deemed safe to drink, “safe” includes what is reported as an acceptable level of these contaminants, not that it is free from them completely. According to Environmental Working Group (EWG), “more than 4 million Americans live in places where contaminants in drinking water exceed a legal limit.”

2. It hydrates your body better.
Drinking filtered water makes it easier for our bodies to absorb nutrients. To get scientific, it increases the rate that water molecules and nutrients are absorbed by your cells, which improves your metabolism and helps out with digestion.

3. It tastes better.
We’re all familiar with grabbing a glass of tap water that just doesn’t taste or smell quite right. Water filters help us avoid both of those things. Along with the harmful stuff, water filters remove the unpleasant stuff, too, making your drinks, coffee, food—everything you use water for—taste better.

4. It’s good for the planet.
Using a water filter is also great for the planet. It’s no secret that plastic use is one of the biggest threats to the environment, and many are looking for ways to reduce their own use. That’s where filtered water comes in. Just one filter used in a water pitcher can save around 300 single use plastic bottles of water.

Here’s the bottom line: Filtered water is healthier, better for your body, and better for the planet. So grab a filter and get on board—your body and our planet will thank you for it.