Kristen Villebrun and Wendy Bush hoped they wouldn't have to pray for Chedoke Creek, but four years after they first raised alarm about the water's condition, they were part of an Indigenous full moon ceremony to do just that. About 50 people showed up near Princess Point on the dark and frigid Monday evening for the monthly ceremony, which was particularly special as it focused on Chedoke Creek. The body of water that runs into Cootes Paradise had about 24 billion litres of sewage and storm water runoff leak into it due to a gate being left open.
Western Canadian municipalities are turning to solar to power water and wastewater treatment plants (WWTP) as a means to decarbonize and cut costs. The trend is particularly strong in sunny Alberta and Saskatchewan, where electricity is traditionally produced by natural gas or coal. Lumsden, a Saskatchewan town with a population of 1,800, turned to solar when its outdated lagoon system near a river meant stepping up to a mechanical WWTP.
Desalination is seen as a path forward to ensuring coastal communities have a steady supply of clean drinking water as populations expand. Historically, desalination projects have struggled to scale widely, as the high amount of energy required to remove salt from ocean water creates costs and damages sustainability. A Quebec, Canada firm has developed a product to address the energy and environmental concerns of desalination by making a modular, floating buoy that harnesses the power of the sun and waves to turn ocean water into drinkable water. Oneka builds a self-contained, solar-topped device that also harnesses tidal power. The two energy sources allow the buoy to draw ocean water in through reverse osmosis, and then convert it to drinkable water.
The Liard First Nation in Yukon is testing a new method of obtaining clean water — pulling it out of the air. An atmospheric water generator installed in Watson Lake is gathering moisture from the air like a dehumidifier, then purifying it for drinking by using UV light. When working properly, the machine can generate 30 litres a day, which is enough for a family's daily needs.
With droughts plaguing much of the western United States and millions of people across the globe living without access to safe water, the need for technologies that produce clean water is greater than ever. The key, according to Evelyn Wang, the Gail E. Kendall Professor and department head for MIT’s Department of Mechanical Engineering, is in the very air we breathe.
