During the watering season the average lawn needs about one inch of water per week except in the hottest weather.
Weather stations measure the amount of water given up to the atmosphere by the average lawn.
This water can be replaced by sprinklers or rain. Many gardeners tend to overwater, not knowing how much water is needed. Professionals use ET measurements to replace only the water used by the lawn. This practice creates optimal growing conditions, saves money on water and reduces plant damage due to overwatering. For more information contact EWEB Water Division.