Calgary's water use back in 'unsustainable' territory

After dipping below the threshold of unsustainable water usage for one day, Calgary is back up into the red area. The city's potable water demand data, updated Monday morning, indicates residents and businesses used 509 million litres of water on Sunday.Sign up for breaking news alerts from CTV News, right at your fingertips The information you need to know, sent directly to you: Download the CTV News AppThat's 15 million litres more than on Saturday and 24 million litres above what the city wou