They’re three words that make any water engineer shudder. “Toilet to tap.”  It’s the alliteration credited with sinking major water-recycling projects. Headline writers around North America just can’t seem to resist using the phrase when describing projects that convert wastewater into clean, drinkable water. Despite the successful adoption of such projects in places like drought-prone California, water reuse hasn’t yet entered the conversation in the same way north of the border. But in places like semi-arid Alberta, still weighing its next moves as surging populations put new pressures on a taxed water supply, some expect embracing more reuse is the next critical step to take.