You can easily measure contaminants in your tap water with simple kits available from hardware stores. And every water company has to post its most recent test results on its Web site and send them to each home once a year (look for them in June - July). If the levels are greater in any sample for any contaminant, or if your water isn't crystal clear, install a tap water filter and then test your water again.
I prefer a charcoal filter, but remember you need some of the trace minerals that come from tap water. Once you stop buying bottled water, you'll save enough money to purchase organic food at the expensive places (and at inexpensive outlets like Wal-Mart, Costco, and Trader Joes, organic food can cost no more than non-organic). While you're at it, get rid of the paper cups and plates.
Switch to the ol' china and glasses. You'll save landfills from filling with mountains of plastic.
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