Washington County, UT Landscaping Rules: Water Restrictions (2026)

daily from June 1 to September 1, the summer window when daytime evaporation is highest. The rule sits inside the county's Irrigation Design Standards, which also require a WaterSense-labeled smart or weather-based controller with automatic rain shut-off and schedule memory on every covered irrigation system, and a pressure-regulating valve wherever static service pressure exceeds 90 psi. 13 separately and permanently bans "water waste," defined to include overwatering, irrigating during a rainstorm, water that sprays or runs off the property, ignoring drought restrictions, or failing to repair a leaking or malfunctioning irrigation system in a timely manner; that ban applies year-round, not just during the June-through-September window.

org: up to one watering day a week in winter, three sprinkler and two drip days a week in spring and fall, and up to four sprinkler and three drip days a week in summer. Each valve must irrigate only plants with matching water needs, grass, trees, and non-grass beds each need their own valve, and drip lines feeding non-grass areas must use emitters rated at 20 gallons per hour or less with a pressure-regulator filter. These irrigation standards apply to all new construction, new development, and rehabilitation of development in any zone under Chapter 27, adopted by Ordinance 2022-1206-O on April 19, 2022, and amended most recently by Ordinance 2024-1252-O, effective March 19, 2024.