The presence of COVID-19 in Madrid wastewater, at highs since the implementation of the Vigía system | SER Madrid North | Hour 14 Madrid North

The presence of coronavirus in the wastewater of the Canal de Isabel II is found in all-time highs, with a lot of difference with respect to the preceding waves, since the system began to collect data in the summer of 2020.

The escalation of Covid remains can be seen both in global figures, as disaggregated for the capital and the rest of the region. The Watcher system incorporates a map by municipalities of the region and districts of the capital differentiated with a color code quantifying the importance of the presence of SARS-CoV-2, its trend is the absolute value compared to the historical data of this municipality / district.

The latest available data indicates that in most of the 179 municipalities of the Community of Madrid, and all the districts of the capital except Ciudad Lineal, there have been strong or weak ascents of Covid records in wastewater del Canal, compared to the previous week.

The only localities where it falls They are Villarejo de Salvanés, Tielmes, Fuentidueña, Estremera, Brea del Tajo, Villamanta, Aldea del Fresno, Cenicientos, Chapineria, Navas del Rey, Valdemaqueda, Fresnedillas de la Oliva, Navalagamellas, San Lorenzo de El Escorial, Hoyo de Manzanares, Miraflores, Guadalix de la Sierra, The Cabrera, Lozoya, Berzosa de Lozoya, Madarcos, Buitrago de Lozoya, Soto del Real y Santorcaz.

The sequence of the graphs warns that the level of Covid in Madrid’s sewage was important between the months of September and October 2020, in the so-called second wave; for then go down and climb again at the end of January this year (third wave).

In February and March, levels fell but remained moderate until pick up something in early April 2021 (the so-called fourth wave), to experience a substantial and prolonged decline until July rise, which anticipated the fifth wave, visible until the beginning of August. Since then levels have dropped to lows to late November, it started to rise to the present, with records that more than double previous wave peaks.

The Watcher system post four graphics. The first three show the general evolution for the entire Community of Madrid, Madrid capital and the rest of the region, and the fourth shows the evolution of the general state of the color sampling points.

Red for wells with increased presence of SARS-CoV-2; orange for wells with a decreasing trend of the moving average with a variation not greater than 33%; yellow for wells with a downward trend of the moving average with a variation greater than 33%; and green: wells without the presence of SARS-CoV-2 in two successive samples.

For wells the trend is very negative. The graphs indicate that in the last two weeks it has increased significantly the records in the red wells, the oranges are maintained and the greens and yellows are falling sharply.

The public data offered on the Canal page are the result of its genomic, statistical and mathematical analyzes. Any interpretation of said data corresponds exclusively to the health authorities of the Community of Madrid, that have more tools to analyze the situation. However, from the public company they state that, due to the very nature of the wastewater and the analyzes carried out, sudden changes in trend need a period of time for their consolidation and validation.

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George Holan

George Holan is chief editor at Plainsmen Post and has articles published in many notable publications in the last decade.

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