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Drinking Water System

The reliable delivery of high-quality water is a complex task that requires constant vigilance, millions of dollars invested in state-of-the-art treatment plants and equipment to meet regulatory requirements, and highly trained, professional employees. This is EID’s highest priority.

In recent years the District has completed a number of important tasks and launched new initiatives related to our drinking water system, as described below.

Water Treatment Plant Improvements

  • Chlorine Conversion - this program consists of conversion of existing gaseous chlorination storage and feed facilities to a safer alternative disinfection system. The modifications are required for compliance with 2003 International Fire Code and 2003 Uniform Fire Code requirements for scrubbing or fully containing gaseous chlorine leaks and protection of public health and safety. Conversion of the chlorine system at the El Dorado Hills water treatment plant was completed in 2009 and at the Reservoir 1 water treatment plant in 2010. A project feasibility review was conducted for the Reservoir A water treatment plant and design is now underway to convert from gaseous to liquid chlorine.
  • Reservoir A Water Treatment Plant Process Improvements – From the nearly 7 billion gallons of water taken from Jenkinson Lake and treated at this plant each year, over 700,000 pounds of solids are removed which need to be dried and hauled away for proper disposal to maintain great water quality. The solids are pumped to drying beds onsite, where the water is drained and the solids are air dried. The first of three drying beds is being reconstructed during the summer of 2012. The upgrades will improve process performance and reduce solids drying time from four months or longer, down to two weeks. Plant labor requirements for solids handling will be reduced significantly. The remaining two beds are proposed for reconstruction over the next several years.

Water Distribution System Improvements

  • Coon Hollow Waterline Replacement – District crews are replacing four sections of previously private 2-inch galvanized sections of waterline with new pipe in accordance with District design guidelines and material standards. The project will improve service reliability and flows to 13 service connections currently experiencing severe low flow conditions. The waterline, when complete, will consist of 550 lf of 6-inch pipe plus 820 lf of 4-inch pipe.
  • Patterson Pressure Reducing Station Reconstruction – the Patterson PRS is contained within an underground vault that due to topography is continuously partially flooded and as a result the pipe and valving system has corroded to the point that it is longer serviceable. This PRS serves approximately 240 connections for which there is no alternative loop supply. District crews will be reconstructing the facility in late 2012.

To learn more about the quality of my water click here.

Water Facts 
EID’s water delivery system area ranges from 500 feet in elevation at the Sacramento County line to more than 4,000 feet in the Sierra Nevada range.
The system requires 181 pressure-regulating zones to operate reliably and more than 1,200 miles of pipe, 27 miles of ditches, five treatment plants, 34 storage reservoirs, and 38 pumping stations.

The cost for a 12-ounce bottle of water at a local convenience store can run from about 99 cents to more than a dollar. For 99 cents, you can drink 565 gallons of healthy tap water from EID.