2020 Consumer Confidence Report - This is the 2019 Annual Water Quality Report for Graham Hill Mutual Water Co., Inc.

2019 Consumer Confidence Report - This is the 2018 Annual Water Quality Report for Graham Hill Mutual Water Co., Inc.

2018 Consumer Confidence Report - This is the 2017 Annual Water Quality Report for Graham Hill Mutual Water Co., Inc.

2017 Consumer Confidence Report - This is the 2016 Annual Water Quality Report for Graham Hill Mutual Water Co., Inc.

2016 Consumer Confidence Report - This is the 2015 Annual Water Quality Report for Graham Hill Mutual Water Co., Inc.

2015 Consumer Confidence Report - This is the 2014 Annual Water Quality Report for Graham Hill Mutual Water Co., Inc.

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 to make you 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 groundwater to the office at (253) 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 Mobile Home Park property and Northbound Meridian across from 257th Street Ct. East. 

A Double Check Valve Assembly (DCVA) is a mechanical assembly located behind (property side) of the water meter that allows water to flow toward the customer, but prohibits flow back from the customer into the public water system.

It is the Water Company’s responsibility to protect its water system from contamination caused by water flowing from the customer back into the purveyors system (WAC 246-290-490(1)(c)). The Graham Hill Mutual Water Company has reviewed the various methods to control this backflow and have decided that the Double Check Valve Assembly (DCVA) is the most economical assembly available to use for the protection it can provide. All new connections and all new construction require the installation of a DCVA. 

WAC 246-290.490 State Law - Washington Administrative Code for Cross-Connection Control