Polluted Pink Lake In Argentina Has Now Turned Red
Locals in the coastal Argentine district of Trelew say a fish processing plant has turned a nearby lake into a cesspit that left its waters pink this past summer, and now the situation has grown darker.

An aerial view of the lake turned red
CHUBUT — Back in July, Argentine authorities had told people in Trelew, in the coastal province of Chubut, not to worry — a local lake that had turned pink, likely by chemicals, would soon be fine again. But instead, it has now turned red — or a kind of red-to-purple violet — as the daily Jornada de Chubut reported.
And again, locals don't know why.
October 1 drone video of the lake, now turned a deeper red hue
Effluents may be to blame
The chief suspect is the effluents from a nearby fish firm, RASA, according to the Buenos Aires newspaper Clarín. In July residents of Trelew denounced the stench of the effluents entering the lake over two years, and the insects and vermin they attracted, and were evidently dissatisfied when Juan Michelou, a senior provincial environmental officer, said "it'll pass, the lake will recover its normal color within days."
The pink color was attributed to preservatives used for prawns.
The pollution provoked a row between Trelew and the neighboring town of Rawson, where RASA (Rawson Ambiental Sociedad Anónima) is based; but Michelou told its residents Trelew had signed an agreement, and effectively accepted the effluents. A Public Works official in Trelew said that was a lie, and "it's ridiculous to minimize this... as if it were normal... they're pouring in untreated liquids, without us knowing."
The lake in July when it first turned pink.
The original pink color was attributed to preservatives used for prawns. Clarín sought to contact Michelou to find what the red might be, but was told by staff "he's taken a few days off."
RASA in any case stopped dumping its prawn waste into the lake after July - and decided to pour it into the sea instead, which further angered locals. Now it is even less clear why, without the toxic prawn cocktail, the lake has turned violet red.
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