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O'Connor checks out water quality

March 26, 2013 | 6:00 a.m. CDT
John O'Connor holds a microscope in the basement laboratory of his Columbia home. A retired MU professor and former chairman of the Civil Engineering Department, O'Connor has been comparing bottled water to ground water since 1980. Currently he runs a water consultancy company, and many of his clients are municipal water providers.

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