Tap water raises this risk by 500%

The most dangerous chemicals in your house aren't in your garage or basement -- they're flowing freely right from your kitchen sink.

I don't care where you live, your drinking water is almost certainly contaminated with chemicals, hormones, drugs, toxic waste and more. And while it can wreak havoc on all sorts of bodily functions, one chemical in particular can be especially damaging to the menstrual cycle.

If you're beyond that time of life, this will be something you'll want to pass along to your daughter.

The chemical is called atrazine, the most commonly used herbicide in the nation, and women who live in areas where even a little bit leeches into the water are 500 percent more likely to suffer irregular menstrual cycles and 600 percent more likely to go six weeks between periods.

Men, I'm sure you think that's just a minor inconvenience of the calendar. But in addition to giving women the stress of a pregnancy scare whenever a period doesn't arrive on time, irregular cycles are a sure sign of hormonal imbalances.

In this case, the women suffered from dips in estrogen levels at key points in their cycles -- putting them at risk for fertility problems, osteoporosis, diabetes, heart disease and even cancer.

Ready for the worst part of this? The atrazine-laced water these women have been drinking is considered perfectly safe by the U.S. government!

It's nuts to think that ANY amount of herbicide is safe to drink, but the feds aren't exactly known for their common-sense approach to water standards -- and atrazine is a literal drop in the bucket here.

There are thousands of other dangerous contaminants turning up regularly in U.S. drinking water -- and most of them are completely unregulated.

But don't rush to stock up on bottled water, and don't waste your time with little filters on your faucet.

Head to the hardware store instead, and order a reverse osmosis filter. They're cheaper than ever and easy to install -- and they're the only guaranteed way to keep everything out of your water, including fluoride and chlorine.

Just be sure to install it where the water enters your home, so every faucet is protected.

For the frightening truth about the sorry state of U.S. drinking water, read the September 2009 issue of The Douglass Report. Not a subscriber? Sign up here. You'll never look at your sink the same way again.