⚠️ City offices and facilities will be closed on Monday, May 25, in observance of Memorial Day.

Facts and tips on water usage and conservation are presented weekly by the City of Walla Walla, in partnership with Walla Walla Community College and the Union Bulletin during the months of May - September.

Precipitation and Moisture

May 2019:  1.93 inches
This May so far:  3.42 inches (as of May 21)

Water Usage

This week's average water use by all city customers:  8.70 million gallons per day.  Last week's average water use:  10.37 million gallons per day.  Fourth week of May 2019 average water use:  8.19 million gallons per day.

Water Use Guidelines

For the week of May 15 - May 121 precipitation was 2.17 inches and turf grass in the area used .72 inches of moisture, according to WSU AgWeathernet data.  Home irrigators should not have run spray type sprinklers or rotor type sprinklers this week.  Calculations are based on average precipitation rates, please adjust for local conditions.

Yard care and water savings Tip

Put nature to work in your yard.  Nature wastes nothing.  In natural landscapes, soil life recycles dead plants into food for new plant growth.  Plants adapt to the water, sun, and soil available in their site.  The wide variety of plants, soil organisms, insects, and animals keep most pests and diseases in check.  By working with nature in your yard, you can have a great looking landscape that’s easier to care for and healthier for families, pets, and wildlife.  Start with these five steps:

  • Build healthy soil
  • Plant right for your site
  • Practice smart watering
  • Think twice before using pesticides
  • Practice natural lawn care


  • Start mowing, about 2 inches high for most lawns.  Leave the clippings for free fertilizer.
  • For lawns in poor condition:  aerate, overseed, and top-dress with 1/2 inch of compost.
  • Fertilize lawns if needed in May with "natural organic" or "slow release" fertilizer.


  • Prepare sprinkler systems by testing, adjusting, and repairing leaks.
  • Lay out soaker hoses in beds, and cover with mulch.
  • Check soil moisture at plant roots before watering - don't water until they need it.

Additional Water Conservation Information

A dripping leak consumes:  15 gallons per day - 450 gallons per month = $1.02 per month