NOW IN EFFECT YEAR-ROUND! Water Conservation Bylaw Outdoor Daytime Sprinkler Guidelines Municipal supplied water from a hose, pipe, sprinkler or permanent irrigation system is permitted only between the hours of 7 p.m. to 9 a.m. Watering at any time is allowed if you use a watering can, hose with a nozzle or a drip irrigation system as these devices control the amount of water used and do not waste excess water.