Through the use of “natural materials,” the alkalinity of Metro Vancouver’s water will be doubled to about 20 mg/L, expressed as calcium carbonate. The region’s water pH will increase from the existing target of 7.7 to a new target range of 8.3 to 8.5. Health Canada’s guidelines for safe drinking water quality stipulates a pH range from 7.0 to 10.5. During the water treatment process, the regional district already adjusts the pH as the untreated source water is naturally slightly acidic.