Sammamish, WA Landscaping Rules: Water Restrictions (2026)

Sammamish residents receive drinking and irrigation water from independent water districts, not from the city. Sammamish Plateau Water (spwater.org) serves much of the plateau and publishes 'Smart Lawn and Garden Watering' guidance recommending that watering a lawn two or three times a week 'should be sufficient' and that watering before 10 a.m. or after 6 p.m. helps conserve water. The district frames these as voluntary efficiency recommendations, not enforceable restrictions, noting that 'golden lawns will come back with the autumn rains.' The City of Sammamish's own sustainability page echoes voluntary conservation — reduce use, use drought-tolerant landscaping, water in early morning or late evening, and 'be aware of water restrictions' during droughts — but does not impose its own mandatory schedule. Mandatory restrictions, when they occur, are set by the water district or triggered by a Washington Department of Ecology drought emergency declaration. Customers should confirm any active restrictions directly with their water provider.