We all know drinking plenty of water is good for our health.But a new study finds a majority of Americans are not hydrating enough. As Alexa Green shares, it's effecting one of our most at risk populations -- children.

For the Yaple family, making sure their two young girls get enough water is definitely a challenge, but a top priority.

"I try to keep an eye on how much they're drinking during the day. I try to limit the amount of juice they drink and make sure they drink milk with meals and then in-between meals, I make sure they have a water bottle," said Ithaca resident Cara Yaple.

But a recent study by Harvard researchers finds a majority of U.S. children are dehydrated. In fact, nearly a quarter of the children asked, reported drinking no water at all.

The study says not drinking water can cause headaches, irritability, or poor performance.

"Especially if it's hot out and we're playing outside. I make sure they have a bottle outside with them while they are playing. It's just something that we do. I don't know if everybody is conscious of it though," Yaple said.  

But according to doctors, it's something all parents need to be more aware of. Not getting enough of this stuff, especially when your child is active or exercising, could be harmful to their health. 

"Most coaches, most parents know, when kids are thirsty, especially on a hot day, they should have free access to water. It's not like no finish running a mile, then we'll give them water. If people are thirsty, they need to drink," explained Dr. Steven Blatt, Director of General Pediatrics at Upstate Golisano Children's Hospital.

And when you hydrate, Blatt says, is also just as important.

"Especially when it gets to be summertime, and looking at adolescents, who are outside doing a lot of activities, which is great, the best time to hydrate is before the activity.It's not after after the activity and not during the activity. If you look at serious athletes, look at a serious runner, they will hydrate for days before a before a big race," he said.  

The good news Blatt says is there is a simple solution. 

As for how much your child should be drinking, researchers recommend children drink at least 6 to 8 glasses of water a day.