Clean the pool with plastic balls

To reduce the concentration of cancer-causing agents in drinking water, Los Angeles residents have recently released hundreds of thousands of plastic balls into Lake Ivanhoe.

Lake Ivanhoe, which contains 220 thousand cubic meters of water, is a water supply for about 600,000 people in Los Angeles. Since June last year, Los Angeles Energy and Water Supply Company (LADWP) has detected bromine levels and a carcinogenic compound in nearby Lake Ivanhoe and nearby Elysian Lake. Further understanding, the company's experts concluded that bromine is formed from the sandy soil layer at the bottom of the lake, while the carcinogenic compound is formed through the reaction between chlorine (pumped into the lake to make Clean water) with sunlight. The optimal solution is to prevent the sun from shining on the surface of the lake.

Among the solutions offered by LADWP scientists, dropping plastic balls coated with the surface of the lake is considered to be the most optimal, because it saves a lot of money compared to the construction of a roof or a canvas.

People produce balls with a diameter of 10 cm and weigh 40 g.

They are made of plastic but have a very solid surface texture, able to withstand temperatures from -20 to 80 degrees Celsius.

More than 400 thousand plastic balls were released on Lake Ivanhoe on August 26.

The balls can last 3-5 years and are not affected by the sun.

Test results show that the concentration of carcinogenic compounds in the lake begins to decrease after dropping the ball.