The Southern Nevada Water Authority conducted the four-month trial, which included more than 1,500 readings of water quality in the categories of dissolved oxygen, pH, calcium and suspended solids. There was no water quality difference compared to 10 years of historic data, Flexible Solutions International says.
The Nevada Department of Wildlife agreed to allow the trial on Lake Sahara, where the endangered species razorback sucker lives, largely because the National Sanitation Foundation approved the product for direct use in drinking water, according to the company.
Flexible Solutions conducted a concurrent trial at Lake Sahara that showed evaporation reduction of 29 percent.
The Sahara Lakes Association, which was briefed by SNWA on the safety, efficacy and water quality aspects of using Watersavr, voted to purchase the product and automatic dispensing equipment this year.
Watersavr is a food-safe powdered form of the active ingredient in the company’s Heatsavr product. It can be applied on potable water storage sites, aqueducts and canals, agricultural irrigation canals and ditches and reservoirs to help reduce free water surface evaporation.
The product can reduce free water surface evaporation in reservoirs by up to 50 percent, depending on the size and wind conditions, the company says.
The company says the product, which has been piloted by governments in Singapore, Turkey, the municipality of Coliban, Australia and the Owens Lake Authority of California, safely reduces evaporative losses from reservoirs at one quarter the cost of desalination for coastal communities.
A US Forest Service Report released in February said most of the southwest, parts of California and the southern and central Great Plains will be the most vulnerable areas in the US to water shortages during the next 60 years.