Drinking Water System

About the System


The City of Greenfield's water source has historically been from groundwater resources, specifically the Salinas Valley Groundwater Basin. The City does not use surface water as a supply source. The City currently operates from 3 wells varying in depth and two 2 water tanks. In 2012 these wells supplied 622,809,000 gallons of water (1905.2Acre Feet) and in 2013 these wells produced 641,062,000 gallons of water (1967.3 acres per foot) for Greenfield's residents. This was a 3% increase in water for 2013 from 2012; these wells supplied our residents with water for personal and commercial use.

The Oak Avenue Booster Station consist of 2 wells, Number 1 and wells Number 6 are located on 14th Street and Cherry Avenue on the northwest of town, The water is treated with 12 .5% sodium hypochlorite, upstream of the well meter; They supply about 2500 gallons per minute of water to a 1 million gallon storage tank and booster pump station located on Oak Avenue and 13th Street. Water is then pump into the distribution system by 4 booster pumps at 47 psi.
The Corporation Booster Station is located behind the Corporation Yard located at Walnut Avenue and Tenth Street consisting of Well Number 7, which pumps about 1800 gallons per minute to a 1.5 million gallon tank treated with 12.5% sodium hypochlorite, upstream of the well meter. The water is then pump into the distribution system by 4 pumps at 55 psi. It joins the distribution system on Tenth and Walnut Avenue. The City monitors the quality of the groundwater that comprises its municipal water supply, and the City's supply meets all regulatory standards. The water system has never violated a maximum contaminant level or any other water quality standard.

Water Production


The Water Division provides water to approximately 3,600 customers within the City limits of Greenfield. The Water Division operates and maintains 17 miles of pipelines ranging from 4 inches diameter to 16 inches diameter. There are 3 ground well sources providing a total capacity of 4,000 gallons per minute. Each booster pump station provides and maintains the required pressure to run the City's water supply.

The Division's maintenance and operations include daily tank and well inspections including chlorine readings and monitoring; including recording daily flow reports; performing monthly water tests at various locations throughout the system including each tank, monthly exercising of water valves including replacement thereof, annual fire hydrant flushing, ongoing water service leak repairs, and logging ongoing water system maintenance, operations, repairs and replacement of appurtenances information on to the City's Geographical Information System (GIS) Program.

Other Responsibilities


The Water Division is also responsible for preparing and implementing a City wide back-flow prevention program. Greenfield takes pride in the quality of its water. Interested residents can view past water quality reports and studies.

2016 Water Quality Report