The Irrigation Water Management Society
 is a non-profit organization
 committed to promoting
 the wise and efficient use of water
 in golf, landscape, and agriculture.
> Check out our Calculators
EPA WaterSense  
Regional weather data and calculators  

Estimate your water needs and create schedules for automatic watering systems

Seattle Area, Current Watering Index , Weekly Watering Forecast

East Seattle Area

You can have weather data and calculators for your region
 - click here for more info -

See how local news stations use the watering index to help conserve water
Classes & Exams  

Request a Certified Site Water Planner class and exam
 - click here for more info -
 Water Conservation Events  
Post your organization’s water conservation event on our Event Calendar
 - click here -
Soil Moisture - ET Demonstration
Project		  
 - click here for more info -
Certified Site Water Planner Program (CSWP)  
Professionals! obtain recognition and learn profitable skills for developing site water management plans
 - click here for more info -
New! Tips for using water
conservation features on your
automatic irrigation controller		  
 - click here for more info -
Get Email Updates for the Irrigation Index  
Get daily updates when the Irrigation Index changes, and/or get weekly updates of the watering forecast:
Email:
Daily Irrigation Index update
weekly Watering Forecast Update
We will not share your email address
Note: email service will start again the second week of April
Become an IWMS Associate!  
Would you like to participate with the IWMS to promote water conservation? Become an Associate and volunteer with one of our groups, boards or committees. - Click here to fill out a brief application. -
Enter city or US Zip
We are extremely grateful to the following organizations. Their commitment to water conservation and to the support of the IWMS is greatly appreciated: