WaterSense Labeled Controllers
Residential outdoor water use in the United States accounts for nearly 8 billion gallons of water each day, mainly for landscape irrigation. Experts estimate that as much as 50 percent of this water is wasted due to overwatering caused by inefficiencies in irrigation methods and systems. WaterSense labeled irrigation controllers can significantly reduce overwatering by applying water only when plants need it.
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WaterSense labels two types of irrigation controllers that can help homeowners and businesses make their irrigation scheduling more water-efficient: weather-based irrigation controllers use local weather and landscape conditions to tailor watering schedules, and soil moisture-based irrigation controllers (also known as soil moisture sensors, or SMSs) monitor moisture levels in the soil to prevent irrigation when water is not needed.
Both technologies allow watering schedules to better match plants' water needs. With proper installation, programming, and maintenance, homeowners and businesses can use WaterSense labeled controllers instead of clock-based controllers on their irrigation systems, and no longer worry about wasted water.
To earn the WaterSense label, irrigation controllers are independently certified to meet specific WaterSense criteria for efficiency and performance. Controllers that use either weather or soil moisture data can be labeled under those respective specifications. Some controllers use both types of data concurrently, and those must be certified under both specifications to bear the WaterSense label.
Read the Irrigation Controller Fact Sheet (1 pp, 232 K, About PDF) for more information.
For tips on selecting irrigation controllers and adjusting irrigation for each season, read the Is Your Watering Under Control brochure (2 pp, 3 MB, About PDF).