Residents of the city of Limpio, Paraguay, are protesting after half of their local lagoon turned bright purple.
They blamed a nearby factory for the pollution, as environmental authorities took water samples.
Authorities confirmed they had found a pipe dumping untreated waste into the lagoon.
Lab tests indicate that the colour of the water is due to the presence of heavy metals like chromium, used in the tanning of animal skins as part of the production of leather.
Report by Avagninag.
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