Most people water way too much if they have a sprinkler system. In Western Washington this leads to fungal and mold problems. Your lawn needs one inch of water a week - set out a tuna can, run the sprinkler and see how long it takes to put one of water in an empty tuna can. It is best if you water just once a week. This will force the roots to go down deep to seek water instead of staying on top. Trees and shrubs once established can survive on even less water. Try watering them only during the dry months of August and September and again just once a week. You may need to dig into the soil and see how far the water has penetrated and make sure when you do water that the soil is dark all the way to the root zone. A mulch on top of the soil will seal in the moisture and keep out weeds so you will use much less water. Keep growing, Marianne Binetti