Lawn watering across Metro Vancouver will be limited to once a week when restrictions come into effect May 1, down from twice a week last year. Water use can increase by up to 50 per cent in the summer months according to the regional district, and lawn watering is a major reason why. The Phase 1 restrictions will remain in effect until Oct. 15. "The region-wide watering regulations are an effective way to help us use our drinking water wisely," Metro Vancouver's website reminds residents.