People living in Okotoks, a town of 30,000 just south of Calgary, are being told to stop watering their lawns and gardens, while residents in the northern part of the community are being advised to boil their drinking water because of low supply in the reservoirs. The boil water advisory from Alberta Health Services and Alberta Environment and Parks affects several neighbourhoods: D'Arcy Ranch, Crystal Shores, Crystal Green, Air Ranch, Suntree and some parts of Crystal Ridge and Sandstone.