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I don't go to the doctor except when I'm very ill, and when I go to India, I drink a drop of local water.

My secret is one the world needs to know - nearly a billion people a year die from unsafe drinking water.

The situation is quite serious - groundwater is important source for water use, including drinking water, and if it gets contaminated, it's very costly and difficult to clean.

My father did irrigation jobs, and I would sometimes accompany him, and that gave me a taste of what was going on in the innards of India.

Drinking water that does not meet a federal health guideline will not necessarily make someone ill. Many contaminants are hazardous only if consumed for years. And some researchers argue that even toxic chemicals, when consumed at extremely low doses over long periods, pose few risks.

Since I was little, it was instilled in me to conserve water. In terms of what can you do as an individual, it's an easy issue to get behind.

I think we should stop drinking bottled water. There's no need to be drinking it if you're living in western communities.

Never be tempted by water. The water tap should be sealed at lunchtime. If, for example, a sauce goes wrong, adding water doesn't help at all; one only achieves a taste of dishwater.

The Safe Drinking Water Act was passed in 1974 after tests discovered carcinogens, lead and dangerous bacteria flowing from faucets in New Orleans, Pittsburgh and Boston and elsewhere.

I drive a hybrid, moving into an electric car. I only drink tap water, never consume food that's travelled.