Contact Information

     1717 5th St. Davis CA 95616

Office Hours
Monday – Friday
8:00am to 5:00pm

Davis Water Quality Improvement Project

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Surface Water FAQ

Surface Water Presentation - May 5, 2016 Community Meeting

What is the Davis Water Quality Improvement Program?
The City of Davis is working to improve the quality and reliability of its public water supply. Working in conjunction with the Woodland-Davis Clean Water Agency, the Water Quality Improvement Program consists of the construction of a six-mile pipeline in Davis that connects with the WDCWA treatment plant’s distribution pipeline. The treatment plant, located just south of Woodland, will transport surface water from the Sacramento River. The Woodland treatment facility will treat this water for human consumption and it will then travel about six miles to the Davis distribution pipeline. The Davis Woodland Water Supply Project will provide 12 million gallons per day (MGD) of surface water from the Sacramento River to Davis water customers (with 1.8 MGD of that amount going to UC Davis) and 18 MGD to Woodland customers. The Water Quality Improvement Program will deliver all customers higher quality water from a more sustainable source.

Davis Pipeline Map


Project Updates

Phase 2 and 3 customers should begin receiving surface water in late September/early October 2016 with full integration expected by December 2016. Phase 3 customers were originally scheduled to begin receiving surface water in early December 2016. Over the last few months, the contractor working on the Surface Water Project pipelines for the City of Davis was able to accelerate their work to complete the project ahead of schedule. Surface water is scheduled to be introduced in East and South Davis in September. Once those areas are fully integrated, surface water deliveries will begin to West Davis. Phase 1 customers began receiving surface water on June 2, 2016. The map below shows the areas of water distribution phasing.  The blue area represents Phase 1 customers. The orange area represents Phase 2 & 3 customers. This map depicts the general area of surface water introduction. Some of the areas in orange may be seeing some affect from surface water.

At surface delivery startup, water may appear temporarily cloudy when it first comes from the tap as a result of air bubbles.  However, should your household experience any brown water during the startup of the Phase in your area, check the hose bib at the front of the house and run the water for about 30 seconds at a high volume. Running this hose bib at high volume should clear up the line from the water meter to your first valve.  Once the water looks clear, turn off the hose bib and then open up the cold water tap in a bathtub at high volume.  This should direct any remaining brown water out of the inside lines into one area of the house.

Please call Public Works Department at (530) 757-5686 during regular business hours (8-5, M-F) with any questions or concerns.  After hours, or if unable to reach Public Works during normal business hours, call the non-emergency Police Dispatch number (530) 747-5400 and they will ensure your issue is addressed by Public Works staff.

If you would like information regarding water quality (tested weekly in the distribution system), such as water hardness, iron concentration, or any other water quality question, please visit the distribution system water quality information page or email water@cityofdavis.org.

The new surface water is naturally softer than local groundwater and based on water quality modeling, water hardness will range between 60 and 120 ppm (parts per million) or a maximum of 7 grains per gallon (surface water blended with deep aquifer groundwater). Full integration of surface water is expected to occur by December.  During times of low demand (winter months), it is our goal to supply the entire City with only surface water.   Once demand exceeds this allotment (summer months) then we will supplement surface water, with a hardness around 60 ppm (3.5 grains), with groundwater from our deep aquifer wells where water hardness ranges between approximately 66-130 ppm (4-7.5 grains). The City suggests residents consider by-passing their softener, to determine if this range of hardness is acceptable for your home or if you choose to continue use of a softener to consult with your plumber to lower the grains setting. Water softened in excess wastes energy, salt, and may feel slimy.

Surface Water Distribution Phasing Map (PDF)

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