Source Protection
Important Information from the Board for customers not having a Double Check Valve Assembly
Effective September 1, 2010 when existing homes or structures without a double check valve assembly are sold or ownership transferred the seller of the property must, prior to final closing, have installed by a certified plumber a Wilkins 950-XLT Double Check Valve Assembly as per WAC 246-290.490 and Graham Hill Mutual Water Company, Inc. backflow specifications and policies.
The estimated cost for the installation, labor and materials is between $500.00 - $1,000.00
URGENT Thermal Expansion: Does it really happen?
The Graham Hill Mutual Water Company has a responsibility to keep our water sources clean. We are very fortunate that our water sources provide high quality water that does not require any treatment. This is true not only for health reasons but also for economic reasons.
It is everyone’s responsibility to keep it from becoming contaminated. As part of our Source Water Protection program, we have posted signs given by the Evergreen Rural Water Association (of which we are a member) to make you (our owners) and the general public aware that we live in our water source area and need to protect and maintain the high quality of the groundwater.
Please report spills, illegal dumping and any other activities that may contaminate our ground-water to the office (847-8617).
The signs that designate our water supply protection area are located on both sides of Graham Hill: Southbound Meridian (SR161) on the Greenview Mobil Home Park property, and Northbound Meridian across from 257th Street Ct. East.