**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. 
We take pride in providing excellent customer service to the 30,000 customers in the City of Nampa.
Irrigation Turn on


News (March 26, 2018)


The City of Nampa will begin its irrigation season by filling the pressurized system on April2. Full pressure is not to be expected until mid-April.

Nampa & Meridian Irrigation District, Pioneer Irrigation and Boise-Kuna Districts plan to release water into the canal system on April 2, however, it could take up to two weeks before the water is available for pump operations due to charging and flushing the system.

City of Nampa irrigation customers should have irrigation water at full pressure by mid-April after crews have tested lines, flushed the system and brought ditch pumps online. 

As crews find problems with water lines, they shut them down for repairs which can result in customers having water one day and not the next, so patience is requested.

If you notice a leak, please call 208-468-5860. This is a 24-hour a day phone number. Due to the volume of calls, if you get our voice mail please leave a message. We will call you back as soon as possible. 

All Nampa residents are asked to check the programming of their sprinkler control box to assure they are not unknowingly over-watering. Those who need help setting a sprinkler control box should contact a lawn care professional. Residents are also strongly encouraged to install their own shut off valve to control sprinkler lines and not to operate the city valve as this is for emergency use only.  
For more information on the irrigation season, irrigation assessment or wise water use please review the attached document or visit our website at

Frequently asked irrigation questions and more information on the irrigation season and assessment.

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 station, water main line, 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

Policy & Property Assessment Login