It’s a fact that up to 70 percent of residential water use is for landscape. One of the most effective ways to conserve water is to irrigate efficiently. The Watering Calculator tool estimates the correct amount of water to give your landscape or garden every week during normal weather conditions. Developed by the city of San Diego, it provides customized watering schedules by zip code based on data from the California Irrigation Management Information System weather station network.

How to use the Watering Calculator: