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Turquoise in the City: How dangerous is the color play of the Sa Riera?

Turquoise water in Sa Riera: what's behind the color

Why does the Sa Riera stream turn turquoise after maintenance, and what does that mean for Palma’s water quality?

Published: September 23, 2026
Turquoise in the City: How dangerous is the color play of the Sa Riera?

Answer

What causes the turquoise color in Palma's Sa Riera stream, and is it safe for the ocean and biodiversity?

The turquoise hue appears when saline water from the Son Tugores treatment plant reaches the Sa Riera after maintenance work on the stream bed. Salt content, remnants of algae, and warm temperatures are named as the main factors for the pale blue color. According to authorities, the discharged water contains no chemical additives and is harmless to the sea and the environment.

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