“Taking some samples periodically is just not going to catch unexpected situations,” Dr. LaBorde says. “You can't ask people to do more unless there are some assurances that what they are actually doing is going to have a public benefit. This E. coli sampling, for instance, sometimes it works, sometimes it predicts, sometimes it doesn't. But all the studies that have come out say it's a very poor predictor of human pathogens in water.”
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