Irrigation

CITY OF NAMPA IRRIGATION SEASON TO END SEPTEMBER 28

The City of Nampa will shut down its irrigation system for the season Wednesday, September 28 to coincide with Nampa & Meridian Irrigation District and Boise-Kuna Irrigation District shut-off date.

As the irrigation districts near the end of their allotment, each district determines when they will shut off the water to customers, which includes the City of Nampa. The City of Nampa receives water from three irrigation districts (Pioneer Irrigation District, Nampa & Meridian Irrigation District and Boise-Kuna Irrigation District). While Pioneer Irrigation District is scheduled to end its season October 3, the City of Nampa needs water delivery from all three irrigation districts to fully run our pressurized system.  

Yearly irrigation assessments are calculated and based on the square footage of a property. The irrigation water is not metered, and the length of the season is dependent on the availability of water. 

After a drought irrigation season last year, Nampa Mayor Debbie Kling City formed the Drought Task Force with a goal to develop strategies to educate the community and identify ways to optimize and maximize available irrigation water. Due to the weather’s unpredictability, the best way we can prepare for next year’s irrigation season is to continue being water wise. The City of Nampa highly encourages residents to continue watering their lawn on an odd/even address cycle through the remainder of the season as it has been helpful at extending our current season. 

Reminders for Nampa's Irrigation Customers:

  • Nampa residents are asked to check the programming of their sprinkler control box to ensure they are not over-watering. 
  • If customers notice a leak, they are encouraged to call the 24-hour hotline at 208-468-5860. Please know that due to the volume of calls, it may be necessary to leave a voice message. Staff will return calls as soon as possible. 
  • Customers requiring assistance setting a sprinkler control box are encouraged to contact a local landscaping professional. 
  • Residents are also strongly encouraged to install their own shut-off valve to control sprinkler lines and are asked not to operate the city valve, as this is for emergency use only.  

How can I prepare for the expected drought?

Experts forecast another drought year and currently our area is considered to be in a severe drought. To best prepare our community, the City of Nampa has formed a Drought Task Force and is working with a variety of organizations. 

We also held a community open house on April 7 from 6-8pm at the Nampa Civic Center. Representatives from Nampa's three irrigation districts were present and Jos Zamzow provided a free one-hour class on the best way to build your lawn's drought muscle. The University of Idaho Canyon County and the Idaho Rural Waters Association were also sharing valuable resources and information. The event was attended by over 300 people.

Open House Boards

City of Nampa's #2CWaterWise Brochure

Jos Zamzow presentation handout

2022 Irrigation Season

To keep up with maintenance costs related to our pressurized irrigation system, a rate increase of 13.7% is needed and was approved by the Board of appraisers and Nampa City Council. Property Owners will see an average increase of $17.54 on their annual irrigation bill this year. The total cost to water your lawn with pressurized irrigation in Nampa is still less than $1 per day (on average).  

To learn more, please click here to view the mailer sent to customers.

A reminder to the City of Nampa water users: Please do not use potable (house) water to irrigate your lawn as it will increase the water and sewer charges to your utility bill.

Irrigation Districts

The majority of Nampa’s irrigation water comes in the canal system from Lucky Peak. The Pioneer Irrigation District and the Nampa Meridian Irrigation District manage most of the canals and ditches in Nampa. In some cases, these irrigation districts are solely responsible for the infrastructure leading to a customer’s property.

City of Nampa Pressurized Irrigation

In many subdivisions, the City of Nampa Waterworks Division is responsible for the pressurized irrigation pump stations, water main lines, and curb stop valves.

The service line, which is between the curb stop and the sprinkler head, belongs to the property owner. The City will not repair a customer’s service line.

Over Watering

Water is a valuable resource in our community, for this reason over watering violates City Code.

Nampa City Codes Section 8-1-22 Waste of Irrigation Water

To report over-watering send us an email.

Watering Tips

Could you be overwatering? Read here

Also, Read our Do-it-Yourself Water Check for the Home Landscape

Policy & Property Assessment Login

Read our Broken Curb Stop Policy

This policy is to address the issue of broken curb stops caused by anyone other than authorized City of Nampa employees. 


AFTER HOUR EMERGENCIES ONLY: There is someone on call after normal business hours, 365 days per year (208) 468-5860.

Please Note: An emergency is any event that causes or threatens to cause damage to property, life or health. We understand your irrigation water is important to you. Please call the number above during normal business hours 8am-5pm Monday-Friday if you are experiencing water outages or low pressure and we will respond to you in a timely manner.