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Winrock International

United States and El Salvador inaugurate ultrasonic buoys in the Lempa River

This story and photos were originally published by the U.S. Embassy in El Salvador on

The U.S. Government, through its U.S. Agency for International Development (USAID), provided funding for the Upper Lempa River Basin Project. Ambassador Duncan presented ANDA El Salvador with a buoy system that will control harmful algae and ensure the water supply for 1.5 million Salvadorans. The system consists of three solar-powered buoys that use ultrasound technology to reduce the spread of microalgae.

U.S. Ambassador William Duncan and USAID Director Christopher Cushing, along with ANDA President Rubén Alemán, inaugurated the innovative ultrasonic buoy system. “Access to clean water is fundamental for the development of any country, to boost a country’s economy and to guarantee the health of the entire population,” said U.S. Ambassador to El Salvador, William Duncan.

According to Alemán, each buoy can cover an area of up to 500 meters in diameter, eliminating up to 90% of the microalgae present and preventing their development. This donation was made thanks to the Cuenca Alta del Río Lempa project, executed by Winrock International, with funding from the United States Agency for International Development (USAID).

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USAID Upper Lempa Watershed Project

USAID Upper Lempa Watershed Project

The USAID Upper Lempa Watershed Project will improve the health and resilience of the Upper Lempa watershed, directly impacting the well-being and water security of 180,000 people in nine municipalities in El Salvador, Guatemala and Honduras, setting the foundation for water resources management essential to millions of people who depend on the Lempa River and […]