Line ‘em up with a giardia back: The cold hard facts about H2O.

Rachel just took the “Go Green Challenge” for “Hollywood Green with Maria Menounos,” which airs Thursday, August 28th at 9 p.m. on Planet Green. She discovered (pun intended) some interesting facts about bottled, filtered and tap water.

So we knew that drinking bottled water makes for a pretty Ugg-ly carbon footprint, what with the 24 million gallons of oil (enough to fuel 30,000 cars for a year) that it takes to make a billion water bottles and the fact that Americans typically only recycle two out of 10 bottles, throwing about 38 billion bottles into the landfill every year.

And we realized that, in contrast to tap water that’s distributed through an energy-efficient infrastructure, transporting bottled water long distances involves burning massive quantities of fossil fuels. Plus, studies have shown that Bisephenol A (BPA), which mimics estrogen and messes with your hormones, can leach from plastic bottles into their containers. (In fact there’s legislation in 10 states including California and New York that would ban the substance completely.)

What we didn’t factor in was the cost: Obviously, tap water is virtually free but you may want to buy a pitcher, ‘fridge or sink filter to get out nasties like lead, copper, chlorine, mercury, pesticides and, possibly, giardia. Say whut? Yup, all of this stuff has been found in our water, but we only know that because the EPA is required to test it daily for bacteria and posts the results to the general public. We have no idea what’s in bottled water because the FDA only requires weekly testing of bottled water and doesn’t make its results public. Scary stuff, no? But we digress.

And what really blew our minds was the cost of bottled: At between $1 and $4 per gallon, an average 20 gallons a month of untested, possibly hormone-disrupting, carbon-footprint widening bottled water will set you back $50. Think on that the next time you worry about gas prices going up.

So while most filtration systems utilize carbon-based technology to make sure your water’s clean and cost between $4 and $5 per month for that same amount (after you factor in the initial purchase), we figured if you’re switching from bottled to filtered and are budgeting a clean $50 bonus into your monthly spreadsheet, you should know about the Whole House Filter from I Love My H20.

Now we’re not so sure about their claims to “energize” your water, making it akin to those that flow in Lourdes and Baden Baden. But their downloadable line-up of published articles and quotes from reputable scientists about the dangers of inhaling chlorine while showering had us at hello. These high-performance, 100% recyclable, copper-zinc filters reduce 99.9% of the chlorine in all the water in the house—not just what you drink from the tap, but your showers, baths, hoses—you name it, it’s filtered. And they reduce exposure to chloramines, VOCs and heavy metals.

At nearly $6,000, an I Love My H20 Whole House Filter don’t come cheap. But it does last longer than the 10 years it would take you to spend the equivalent in bottled water. And lets you tread a little lighter on the Earth.

Click through and find out how to get 10% off across the board at ILoveMyH2O through September 8th. Glug. Glug. gives you the lowdown on how to reduce your carbon footprint from a ginormous Ugg to an oh-so-slender Manolo, with updates on green fashion, beauty, lifestyle, celebrities, and more, plus a free weekly newsletter with information on discounts, eco-swag, and go-to green events nationwide. Stiletto-size me!