Sewage Testing Shows Rise in COVID Infections in Macomb County, Authorities Say

CITY OF CLINTON, Michigan. – Analysis of sanitary wastewater in Macomb County shows that COVID-19 infections in the area are high and will likely continue to rise, county officials report.

Throughout the pandemic, the Macomb County Public Works Commission has been sampling sewage in parts of the county to test for COVID-19 in an effort to help track infections and virus outbreaks. Officials say this coronavirus testing method more accurately describes the overall community infection because it “includes sampling of waste dumped by people who are already infected but have not been tested. While some infected people await test results, or are not tested at all, sewage test data provides a faster and more complete snapshot of infection in the population, ”a press release reads Tuesday. .


Related: Waste monitoring: sewage can help track pandemic virus trends

According to the county, sewage samples that were recently tested in Clinton Township, where the program primarily operates, show that COVID infections are actually higher than currently reported and are likely to continue to grow.

“The tests show the trend line of what will come a week before, it is a precursor. Unfortunately, our tests show that COVID cases will continue to increase through next week, ”said Macomb County Public Works Commissioner Candice Miller.

Authorities say the number of positive COVID-19 tests in Macomb County has increased by 125 percent in the past two weeks and that residents are at a “very high risk level.”

This graph shows that the growing number of positive COVID-19 tests in Macomb County will continue for at least another week, based on laboratory analysis of sanitary sewage. The graph shows the reported COVID-19 cases in the county compared to the public service commission data. (Macomb County Public Works)

Virus cases are increasing in the Detroit metropolitan area and throughout Michigan. COVID-19 cases have increased in recent weeks.


On Monday, Michigan reported 4,801 new virus cases and six deaths over the weekend. The total number of confirmed COVID-19 cases in Michigan has risen to 629,612 as of Monday, including 15,903 deaths.

Michigan’s 7-day moving average for daily COVID cases was 2,719 on Monday, the highest since early January. The 7-day death average was 16 on Monday and has been stable for several weeks. The state also reports “active cases,” which numbered 50,900 on Monday. More than 562,000 have recovered in Michigan.

Michigan has reported more than 3.5 million doses of COVID-19 vaccine administered, as of Sunday, with 28.5% of residents receiving at least one dose.


Michigan COVID-19 Vaccines: How to find appointments, information about the phases

Related news: Man’s body found outside a medical center in Macomb municipality

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