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Q. Is it safe to use the water that comes off my roof into a rain barrel to water herbs and vegetables that we eat?

Ron
Jefferson, Md.

A. Dearest Ron,

Using sweet rainwater to nourish your burgeoning salad ingredients is just like a refreshing drink straight from a mountain stream. By which I mean – and if you’ve ever had the misfortune of experiencing what I’ll call “the wilderness two-step” after indulging in the latter, you’ll know this already – proceed with caution. Both water sources may look clear, pure, and unequivocally healthy, but you never know what invisible intruders lurk within.