From email from the Douglas County Water Resource Authority:
As spring snow and rain showers give way to warmer days, your thoughts may be turning to enjoying your yard this summer. If you’re over watering your lawn, you may want to consider taking a few minutes this weekend to install rotary sprinkler nozzles. These nozzles reduce the amount of water applied to your lawn by up to 30% over traditional designs. A simple change-out of nozzles can Save Water, and Save Money. It’s so easy, a kid can do it!
More conservation coverage here.