Assigned Day Watering


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EVERYONE should be smart about outdoor Watering

Whether it’s raining in June or dry in December, Truckee Meadows Water Authority (TMWA) always encourages customers to be smart about water. This means watering according weather conditions, using only the water your yard needs and avoiding waste. While we can’t control the weather, we can help you get control of water efficiency in your yard.

Why Assigned-Day Watering Works

Assigned-Day watering is designed to reduce stress on TMWA’s water delivery system by designating specific days for outdoor watering. Assigned-watering days also help our customers keep their lawns healthy by promoting watering deeper and less often. By giving your lawn time to absorb water, you reduce the chance of it running off and into the gutter. Determining your watering days is easy. Check out the Assigned-Day water schedule below.

Tips for Watering on Your Assigned Days

Assigned-Day watering only applies to your sprinklers. Run them when it’s cool and not windy, usually early in the morning. Also, be sure to turn them off when it’s raining. If the last number of your home or business address is:

  • Even (0, 2, 4, 6 or 8), run the sprinklers on Tuesdays, Thursdays and Saturdays.
  •  Odd (1, 3, 5, 7 or 9), run the sprinklers on Wednesdays, Fridays and Sundays.
  • Shut your sprinklers off between 11 a.m. and 7 p.m. from Memorial Day through Labor Day.
  • Also, give your sprinklers a rest on Mondays, as it is TMWA’s day to replenish and maintain our water system.


Running drip systems and hand watering trees, shrubs, flower beds and vegetable gardens is permitted any day of the week. Please use an automatic shut-off nozzle when watering with a hose.

Plant What Thrives - Water Efficient Landscape Guide 

Outdoor irrigation increases water usage. That’s why it’s important to know more about the types of plants and trees that thrive in our arid climate. With this in mind, TMWA offers extensive online resources to help you design, plant and maintain a water efficient yard.

Visit to find out more!

Water Use Review Program

Think you have a leak? TMWA’s Conservation team will come to your home or business and help you identify water waste and guide you back to efficient water use. Please contact the Conservation Department at (775) 834-8005 or to schedule a consultation.

Tours and workshops

From irrigation start-up to winterization, our Conservation Department has workshops and tours to help you understand the watering needs of your landscape throughout the seasons. All workshops are FREE. View a full schedule of events at