Water Department

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Water Source and Quality

Cottage Ave Water MainThe City’s drinking water is supplied by two groundwater wells and one surface water source. Cashmere has sufficient water rights from these sources to meet the demand requirements of the existing system; however, additional annual water rights will be required within the 20 year planning period. The City began planning for the additional rights several years ago to ensure an adequate and reliable source of water is available for both existing and future customers. This prudent planning of water sources is especially necessary today, given the complexities involved with the lengthy process of acquiring additional water rights.

Overview of Existing System

The City presently provides service to approximately 1,237 customer connections, or 2,274 equivalent residential units (ERU’s), within the City’s water service area, which incorporates all the City limits. The City limits and water service area comprise an area of approximately 2.3 square miles.

The City’s chlorinated water supply is provided by two groundwater wells and the Wenatchee River source, which flows through a slow sand filter treatment plant. Water storage is provided by two reservoirs that have a total capacity of 3.0 million gallons (MG). In addition, the Cashmere water system has four pressure zones with seven pressure reducing stations, one booster pump station, and approximately sixteen miles of water main.

Water System Ownership and Management

The City of Cashmere is a municipal corporation that owns and operates a public water system within its corporate boundaries. Water system data is shown below:

Water System Information Description
System Type Group A - Community - Public Water System
System Name City of Cashmere
County Chelan
Water Service Area 2.3 Square Miles*
DOH System ID Number 117000
Owners Number 923
Customers 1,237*
Equivalent Residential Units 2,274*
Demand per ERU 447 Gallons Per Day
Annual Supply  370,815,000 
Average Day Demand 706 GPM
Unaccounted for Water  30%
Peak Day/Average Day Demand Factor 1.71
Peak Hour/Peak Day Demand Factor 1.80
Number of Pressure Zones 4
Number of Wells & Total Capacity 2 (345 GPM)
Number of Surface Water Source & Total Capacity 1 (2,400)
Number of Reservoirs & Total Capacity 2 (3.0 MG)
Number of Pressure Reducing Stations 7
Total Length of Water Main 17 miles*
Water Rates


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