Rhoda Nanook was alarmed when officials from the local housing authority started testing her home water tank for lead with little warning or explanation. "After all these years, why now?" she asked. "It's kind of shocking to learn that you might have lead in your water supply." Nanook lives in public housing with five others in Taloyoak, Nunavut, where there is a housing shortage. Her daughter Karen Nanook, who shares the house with her, has been on a housing wait list for 10 years.