Nashua, NH Landscaping Rules: Water Restrictions (2026)

Pennichuck Water Works is the primary public water supplier for the City of Nashua. The Pennichuck water restriction schedule applies year-round and is published on Pennichuck's website. Level 1 (Odd/Even): Lawn watering with sprinklers and irrigation systems is allowed based on odd/even house numbers; odd-numbered homes on odd-numbered calendar dates and even-numbered homes on even-numbered calendar dates. Level 2 (Two Days Per Week): Lawn watering is allowed on assigned days between the hours of 5:00 a.m. and 8:00 a.m.; under the published schedule odd-numbered homes water Monday and Thursday and even-numbered homes water Tuesday and Friday. Level 3 (One Day Per Week): Sprinkler use is permitted once weekly between 5:00 a.m. and 8:00 a.m. Level 4 (Total Outdoor Ban): All outdoor water usage is prohibited except specifically noted exceptions. Across all levels, Pennichuck permits hand-held hoses and watering cans for vegetable and flower gardens on any day, and permits the filling of kiddie pools 6 feet or less in diameter and no deeper than 12 inches on any day. Pennichuck states that water restrictions are in place all year long and customers are contacted by letter, email, or phone call when changes are made. Drought-stage triggers are coordinated with NH DES Drought Management Program. The City of Nashua does not impose a separate municipal watering ordinance on top of the utility schedule.