Am I required to reduce my water use right now?

    No, but we need everyone to do their part and help reduce the likelihood of mandatory measures later this summer. Mercer Island is currently receiving enough water, but during the high-demand summer months, it is possible that our demand will exceed our supply.   

    What can my household do to reduce water usage? 

    We are asking that residents and businesses water outdoor plants and lawns before 10am or after 8pm, and only on the following days:  

    • Sunday, Wednesday, Friday if your address ends in an ODD number  
    • Tuesday, Thursday, Saturday if your address ends in an EVEN number  

    There are other easy actions you and your family members can take to help us collectively reduce our water consumption. This includes:  

    • Only running full loads in your dishwasher and washing machine  
    • Reduce shower time by 2 minutes  
    • Avoid filling swimming pools and hot tubs  
    • Avoid power washing  
    • Avoid washing your car at home   

    A full list of actions you can take can be found here.

    Should I postpone planting new landscaping and outdoor plants? 

    Given the current water situation, we do recommend postponing new landscaping and plantings until the fall if possible.   

    However, if you move forward with new plantings, please note that we are asking residents and businesses to water plants and lawns before 10am or after 8pm, and only on the following days:  

    • Sunday, Wednesday, Friday if your address ends in an ODD number  
    • Tuesday, Thursday, Saturday if your address ends in an EVEN number

    What are ‘water flushes’ and why are they happening when the City is seeking to conserve water? 

    Flushing water mains is a routine maintenance process that maintains water quality by removing sediment and minerals from water lines. It involves opening fire hydrants under controlled conditions to send a rapid flow of water through the mains, which scours the inner walls of the pipes and helps remove build-up. Flushing can also help reduce water age, maintain chlorine disinfection and address water quality complaints. 

    What is the City doing to reduce operational water use?

    All departments are looking at ways to reduce City water use, including limiting vehicle washing and reducing or eliminating power washing. Parks and Recreation staff have identified properties where irrigation can be reduced or discontinued for the season, so you may notice some lawn areas browning out.