Did you know that upward of 70% of the water consumed by many homes is used outdoors? A Weather-Based Irrigation Controller can help save water while maintaining a healthy landscape.

Unlike simple “timer” irrigation controllers that operate on a fixed schedule, Weather- Based Irrigation Controllers automatically adjust watering schedules by using information gathered from either remote or on-site weather sensors to calculate the actual water needs of the landscape plants.

Results will vary depending upon previous watering practices and the types of landscape materials found on the property. However, a recent study in Orange County demonstrated an average potential saving of 25%.

Yes

ET is the abbreviation for Evapotranspiration. Evapotranspiration is the term that describes the combination of water used by plants (transpiration) and the amount of water lost to evaporation by the landscape. This is the maximum amount of water that should be replaced by the sprinkler system.

Yes. As you may know, different plants require different amounts of water. The thirstiest plants, such as our lawns and shade plants require the most, while native and “California Friendly” plants require significantly less.

You don’t have to. ET controllers automatically factor this information into the irrigation schedule. The manufacturers provide all the information you need to get up and running.

No. The controller will determine which days it will water the different areas of your landscape, and how long it will water for, based upon the plant material, slope, type of soil and type of sprinkler head used. However, you will be able to tell the controller which days not to water, if you wish.

Each of these controllers either is, or can be equipped to monitor rainfall. It will shut down during rain, either light or heavy as determined by you, and will remain off for a minimum number of days, also determined by you, or until it would have normally watered if no rain had fallen. Unfortunately, the controllers do not have the ability to measure the amount of rain that has fallen.

Yes.

If you notice that your planted areas are too wet or too dry, the controllers allow for easy adjustment of the sprinkler runtimes. If the problem is more localized, you may want to look for problems with the sprinkler system in that area. If you need help, call the Water District to schedule a FREE Water Use Efficiency Survey. We would be pleased to analyze your irrigation system and make recommendations on how to optimize its performance.

Your first point of contact should be the manufacturer. Each has customer service staff to answer any questions.