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Sulfonic acid, which can cause serious harm to human health, has leaked into the Rio Seco in Joinville, southern Brazil.

The particular compound in the beef is known as perfluorooctane sulfonic acid, or PFOS.

Taurine is an amino sulfonic acid found in many energy drinks due to its performance-enhancing properties.

The city closed the Haven well in May 2014 after high levels of perfluorooctane sulfonic acid were found in its water supply.

The city closed the Pease base’s Haven well in May 2014 after high levels of perfluorooctane sulfonic acid were found in its water supply.