Tap water can contain more than 90 contaminants -- some harmless, some downright scary. Find out whether you have cause for concern by testing with Silverlake Research's Watersafe All-in-One Kit (watersafetestkits.com). It measures levels of bacteria, chlorine, lead, nitrates, and pesticides (all calibrated to EPA standards) and is easier than mailing water samples to a lab.
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