Irrigation in the Pacific Northwest

Lawn Water Management

If you don't know your daily water use, you can research your state's crop water use information. AgriMet provides a list of crop water use charts for Idaho, Montana, Oregon, Washington, California, Nevada, and Wyoming. Choose your state, then choose a location from your state's list. Then use the daily water use value from the "Lawn" row in the Estimated Crop Water Use table. AgriMet provides crop water use charts during April through October.


Learn more about the units used on this page.


Grass Type:
Precipitation Rate:
Daily Water Use:

Watering Period

Application Depth

Operation Time
1-4 days
5-7 days
8-10 days
10+ days

WSU Prosser - IAREC, 24106 N Bunn Rd, Prosser WA 99350-8694, 509-786-2226,