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City of Paso Robles
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Water Production & Distribution Division
1230 Paso Robles Street
Paso Robles, CA 93446
(805) 237-3866
(805) 237-6596 FAX
Water Billing:
(805) 237-3996
Mon-Fri 7am to 3:30pm



Water Situation Slide PresentationWater Sources

This slide presentation briefly explains the community water situation and the solution that is Nacimiento Water – for your information and reference. [pdf:2.1mb/7pp]

Currently, the City of Paso Robles relies entirely on groundwater, drawn from a large aquifer known as the Paso Robles Basin and the Salinas River Underflow. Over fifty percent of the City’s water is supplied by seven relatively-shallow wells located along the Salinas River corridor. The twelve deeper basin wells located throughout the City supply the remainder of our water.

Nacimiento Lake Water -
A Reliable New Water Supply Learn More...

The City is a participant in the Lake Nacimiento Water Project and has secured a 4,000 acre-feet per year water entitlement. The recently adopted connection fees and water rates will provide the funds needed to construct a new surface-water treatment plant. The design of the facility is underway and is planned to be online by 2015. In addition to a new water treatment plant, connection fees and water rates will provide for the ongoing operations and maintenance of all City water infrastructure.

The use of Lake Nacimiento water will enable the City to reduce its dependency on the Paso Robles Groundwater Basin, and provide a reliable long-term water supply for the City. The City’s historical and projected water supplies are shown in the chart below.

The City's Urban Water Management Plan documents the City’s sources of water supply, defines water demands, presents a water shortage contingency plan, describes implementation of water demand management measures and guides conservation efforts. Learn more...

Water Quality

Over the years, the City has dedicated itself to producing drinking water that meets or exceeds all state and federal drinking water standards. You can download the entire Water Quality Report here or pick one up at Water Services in City Hall at 1000 Spring Street.


Water-quality samples are taken throughout the City are tested regularly. The samples are sent to an independent laboratory for analysis, insuring compliance with all state and federal regulations. On a weekly basis tests are conducted for coliform bacteria as an early indicator for pathogenic contamination.

The City’s water is regulated by numerous agencies under many laws. Some of the agencies that monitor are:


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