27 August is the first-ever World Lake Day, dedicated to tracking and protecting the health of millions of lakes around the globe.
This Copernicus Sentinel-2 image from 13 August 2025 shows Lake Suchitlan, El Salvador’s largest wetland reservoir and a key source of the country’s hydropower.
In the image, the green colouring on the lake’s surface points to the proliferation of aquatic vegetation. Such blooms are often driven by excess nutrients, pollution, and seasonal rainfall. Their presence can affect can impact the lake’s ecosystem by disrupting the habitat and well-being of the many species which rely on it.
The Copernicus Sentinel satellites are useful for monitoring the health of water bodies around the world. Furthermore, the Copernicus Marine Service delivers value-added information to support decision-makers in developing effective policies for addressing the consequences of invasive species.
