**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. 

 Pressurized Irrigation: Information 

Irrigation Turn on


News (April 1,2019)


Irrigation districts announce water release dates

City of Nampa irrigation water expected mid-April

The City of Nampa will begin its irrigation season by filling the pressurized system April 1 and customers can expect full pressure by mid-April after crews have tested lines, flushed the system and brought ditch pumps on line. 

Nampa Meridian Irrigation District plans to release water into the canal systems April 1, Pioneer Irrigation District on April 10, and Boise-Kuna Irrigation District’s dates are still to be determined. Due to Nampa’s charging and flushing systems, it takes up to two weeks before the water is available for pump operations.

Crews will work to ensure the water lines are functioning properly and may need to temporarily shut down a line for repair. Temporary closures may interrupt irrigation service for customers, so patience is appreciated. 

 Nampa residents are asked to check the programming of their sprinkler control box to ensure they are not unknowingly over-watering. If customers notice a leak, they are encouraged to call the 24-hour hotline at 208-468-5860. Due to the volume of calls, it may be necessary to leave a voice message. Staff will return calls as soon as possible.

 Customers needing assistance setting a sprinkler control box are encouraged to contact a local lawn care professional. Residents are also strongly encouraged to install their own shut off valve to control sprinkler lines and asked not to operate the city valve as this is for emergency use only. 

The City of Nampa receives the majority of its irrigation water from canals and ditches supplied from mountain reservoirs like Arrow Rock, Lucky Peak and Anderson Ranch. Pumps draw water from the canals and ditches to provide pressurized service to customers. The length of the irrigation season is dependent on water in the reservoirs and canals.

 For more information on the irrigation season, irrigation assessment or water conservation tips, please visit

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

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