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Stream in Suburban Buenos Aires Turns Blood Red, Sparking Pollution Alarm

Residents raise concerns after a stream near Buenos Aires takes on a shocking vermilion hue, suspected to be caused by industrial chemicals.

By Michael Levenson and Natalie AlcobaSource: nytimes.com2 min read
Stream in Suburban Buenos Aires Turns Blood Red, Sparking Pollution Alarm
Image via nytimes.com

In brief

A stream in Sarandí, a suburb of Buenos Aires, has turned bright red, alarming residents and prompting investigations into possible industrial pollution. Environmental officials speculate the color could result from organic dye, with testing underway to identify the cause.

A stream in Sarandí, located about six miles south of Buenos Aires, Argentina, has recently gained attention for its unnerving vermilion color, leading to speculation regarding potential pollution from local industries. This transformation caught the eye of residents, who reported noticing a strong, unpleasant odor—described by many as “nauseating, like garbage”—emanating from the waterway.Local news sources indicate that factories and tanneries in the area may be responsible for the stream's alarming color, which enters the Río de la Plata, a significant water body that separates Argentina from Uruguay. The alarming event is not unprecedented, as the region has struggled with pollution for years; the Matanza-Riachuelo River basin has previously been labeled one of Latin America’s most contaminated waterways. Authorities have attempted to mitigate sewage and industrial discharge into the basin through extensive public works initiatives.The Province of Buenos Aires' environmental ministry quickly addressed the situation by taking water samples following reports of the stream's unusual color. Preliminary hypotheses suggest the red hue might be attributed to “some type of organic dye,” yet results from these tests had not been revealed by Friday.Maria Ducomls, a Sarandí local with over three decades of residence in the area, reported that the stream has previously exhibited various other colors, including blue, green, and pink, often accompanied by an oily sheen. “It’s terrible; it looked like a river covered in blood,” she lamented, blaming pollution for these alarming changes.Moira Zellner, a professor at Northeastern University familiar with Buenos Aires' environmental challenges, expressed little surprise regarding the stream’s current state, attributing it to a “chronic lack of regulation” in the region. The persistent pollution has severely impacted local communities, who face dire consequences of environmental negligence.Concerns regarding possible industrial dumping were echoed by Carlos Colángelo, the president of the Professional Council of Chemistry for Buenos Aires. He warned that the responsible parties could be operating without proper chemical knowledge, stating, “a company that would have dumped this is totally unscrupulous.” As residents and officials await further findings from the water testing, the incident serves as a stark reminder of ongoing environmental struggles in the Buenos Aires region.

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