Portland wastewater testing shows sharp increase in coronavirus

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After being at low levels for months, coronavirus prevalence doubled at both Portland Water District wastewater treatment plant locations this week. The levels, measured in copies of coronavirus per liter of wastewater, were at about 1 million at the East End plant as of Friday, and 1.3 million at the Westbrook plant. That’s far below levels seen in late January and early February, when virus p...

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