The Kensico water sits blue and enormous behind its dam, and the neighborhoods below it in North White Plains wake early to the sound of mowers. Northern Westchester Lawn Care Service, LLC is part of that sound from April to November — routine mowing, trimming, edging along curbs and walks, and a clean blow-down once the cutting is finished. Spring cleanups pull the winter's debris off beds and turf; fall cleanups take the leaves away before they mat down. On a humid July evening a freshly cut yard smells like the whole season at once. The work stays close to home, in North Castle and the towns immediately around it.