After years of Clark's prodding, Christa has finally made the switch from bottled water to tap water. What finally made her cross over from the dark side? She got hold of the Watersafe All-In-One Test Kit at Whole Foods.

For just about $20, she was able to test her family's tap water for bacteria, lead, pesticides, nitrates, nitrites, chlorine, pH and hardness. Well, the water passed with flying colors, and her brood has been drinking from the tap ever since.

Bottled water will run you about $1,400/year, not to mention that it's an environmental disaster because of all the plastic. That price alone is about 1,000 times what tap water costs! Meanwhile, 1 in 3 brands are just filtered municipal water, which is essentially glorified tap water. So why pay all the extra dough? Try a home-testing kit if you're still concerned about safety.