Reduced blue-green algae counts in New Zealand

No chemicals

LG Sonic technology is safe for fish and plants

24/7 insights

Real-time water quality data


User-friendly water quality software

Reducing blue-green algae counts

Five solar-powered algae control systems where installed in the Lower Nihotupu Dam in Auckland, New Zealand to reduce the levels of blue-green algae. The project started in December 2016, the project appeared to be of great success with the blue-green algae count over summer significantly  less than the previous year.

The main objective for this project was to reduce the blue-green algae counts in the dam used as water supply. When blooming in the summer, the blue-green algae increases the process costs of the water. Ultrasound technology combined with real-time water quality monitoring provides a cost-effective solution to control algal blooms. The ultrasonic sound waves provide a long-term solution for a healthy ecosystem and are proven to be safe for humans, plants and other aquatic life.

A water sample taking after MPC-Buoy had been deployed to control algal blooms.


Since the MPC-Buoy installation in December 2016 the project appeared to be of great success. The blue-green algae count proved to be significantly lower during the summer compared to the previous year. The real-time water quality data predicts new algal blooms allowing them to be controlled before they become a problem.

[This article is based on the article; ‘Sound waves kill algae in Auckland lake’’ published at Stuff Environment, written by Simon Smith.]


Project details

Location Auckland, New Zealand Industry Drinking water Client Auckland utility
  • No blue-green algae issues
  • Real-time water quality insights

Any questions about this case?

+31 (0) 70-7709030

Or send us

a message
Our team of microbiologists and water quality experts is here to help you with your questions.

Applied product

LG Sonic developed the MPC-Buoy specifically for larger water surfaces such as cooling reservoirs and drinking water reservoirs.


Related case studies

Dominican Republic case study
87% algae reduction to improve drinking water

The country’s most important water source After years of struggle with algal blooms, The Santo Domingo Water and Sewage Corporation (CAASD) installed multiple MPC-Buoy systems to cover the 7km²/2.7mi² Valdesia reservoir. The first results were visible after two weeks, and the project exceeded the targets for the first year with a 87% reduction in algae levels. The Valdesia reservoir is the main drinking water supply for the population of the…

Read more
Dubai municipality case
Dubai Municipality
73% blue-green algae reduction in Dubai

Reducing algae growth In August 2018, LG Sonic began a new project in Dubai in collaboration with the Dubai Municipality to control algal blooms in the Al Qudra lakes. The lakes were created by the municipality as part of a project to enrich this part of the Dubai desert. To control the algal blooms, three MPC-Buoys were installed. After 60 days, it was clear that the systems improved the water…

Read more
Empresas Públicas de Medellín
5 years and 5 successful projects with EPM

Control of (cyanobacterial) algal blooms In 2015, LG Sonic began the first project with EPM, installing eight MPC-Buoy systems in the La Fe reservoir in Colombia. The water body is the main drinking water source of the city of Medellin. Since the installation of the systems, algal blooms have been controlled effectively, even in the extreme environmental conditions of ‘’El Nino’’ in 2015-2016. The interactive algae control systems allow to…

Read more