Water Resources

Drought Resiliency 

The City of Ukiah has a diverse “portfolio” of water sources it can access to ensure maximum drought resilience.  The City also tracks both the use and production of water to monitor the conservation and sustainability of our water supply. Through recycling and recharge, the City of Ukiah often achieves 100% conservation.

Drinking Water 

The City of Ukiah produces high-quality drinking water from groundwater and the Russian River. The City operates a water treatment plant as well as a number of deep wells to ensure access to water year-round.

Recycled Water 

The City of Ukiah produces Recycled Water at our Wastewater Treatment Plant.  Recycled water is used to irrigate farms, parks, schools, sports facilities, the cemetery, and schools.  Providing recycle water to the community helps conserve water by reducing demand on other sources such as groundwater or the Russian River.  It also helps reduce or eliminate the need to discharge previously treated wastewater to the Russian River. 

Wastewater 

The City of Ukiah’s Wastewater Treatment Plant treats wastewater from the City of Ukiah as well as surrounding areas via our partnership with the Ukiah Valley Sanitation District.   The City of Ukiah’s plant has seen extensive updates during the last 10 years to improve efficiency, water quality, and produce recycled water.

Ukiah Valley Water Authority (UVWA)

The Ukiah Valley Water Authority is a JPA that operates water and wastewater facilities in the upper Russian River watershed.  UVWA signatories include the City of Ukiah, Willow County Water District, Millview County Water District, Calpella County Water District, and Redwood Valley County Water District.  The UVWA also operates facilities for Hopland Public Utility District and River Estates Mutual Water Corporation via contract.   

Projects  

The City and the UVWA endeavor keep our facilities reliable and up to date with industry standards.

Resource Documents 

Water and wastewater utilities are required to prepare a number publications to comply with State and Federal regulations.  

Contact Us

Water Leaks: (707) 467-5783

After Hours Water Emergencies:
(707) 463-6262

Hours

Monday – Thursday 7:00 am to 4:30 pm

Fridays 7:00 am to 3:30 pm

Phone – (707) 467-2842

Fax – (707) 467-2841

Contact – Michelle Wagenet

Address – 300 Plant Rd

Phone – (707) 467-2818

The City of Ukiah is fortunate to have an abundant supply of high-quality water. The City has two primary water source: the surface water from the Russian River and ground water.

The City has a broad portfolio of water rights which allow the City to shift sources of water as needed.

  • Pre-1914 Appropriative Right to divert approximately 2,000 acre-feet annually from the Russian River
  • 1954 Appropriative Right to divert approximately 14,480 acre-feet annually from the Russian River
  • Capability to divert approximately 4,000 acre-feet of groundwater in the Ukiah subbasin
  • Contract with RRFC for 800 acre-feet annually

The City also has a four modern ground water facilities that can be utlilized to match the current demand under a variety of scenarios.  If needed, the City has enough groundwater capacity to meet its needs without using any surface water.

Maintenance and Operations

The City employs staff of highly-trained water operators, mechanics, and lab technicians to ensure delivery of clean and safe drinking water with a minimum or no interruption to our customers. The City also operates the water systems for its partner agencies in the Ukiah Valley Water Authority (UVWA) including Redwood ValleyCalpella, Millview, and Willow CWDs.  The City also operates Hopland PUD and Russian River Estates. 

Staff monitor demand within the system and matches the output of the sources to meet the demand. A Supervisory Control and Data Acquisition (SCADA) system allows staff to effectively operate and troubleshoot the City’s water distribution system by monitoring all pumps, pump stations, and reservoir parameters remotely.

Reports

One Billion Gallon Event

Recycled Water

The recycled water project known as the “purple pipe project” provides numerous benefits to our community including promoting a vibrant agricultural region, reducing diversions from the Russian River, assisting in conformation to State conservation objectivesreducing treated water discharge, and improving environmental habitat by providing an alternative source for frost protection.

The Project was designed to be constructed in 4 phases. Phases 1-3 brought the project online by 2019 with the installation 8 miles of pipeline, 66 million gallons of storage, an enlarged chlorine contact basin, and a pumping facility. Phases 1-3 cost $34 million, which was provided by the State Water Resources Control Board (SWRCB) in the form of a low-interest loan and $9 million in grants.

In 2023, the SWRCB awarded Ukiah a $53.7 million grant for the Project’s Phase 4 expansion, which was completed in the fall of 2025. Phase 4 increased the Project’s capacity to 1,500 acre- feet per year. That additional water will irrigate other important areas including Vinewood Park, Frank Zeek School, Pomolita School, soccer fields, Ukiah High School, the Ukiah Cemetery, Anton Stadium, Giorno Park, Todd Grove Park, and the Ukiah Valley Golf Course.

  • By providing recycled water for fields and agricultural use, the recycled water project significantly reduces demand on the Russian River, Lake Mendocino, and groundwater resources. That helps meet conservation goals, and improves regional sustainability. The City achieves 100% conservation most years by recycling and recharging more than it diverts from the groundwater basin. 

Wastewater

Water that goes down your shower, toilet and sink drain enters our wastewater collection system. Over 93 miles of underground pipes bring this wastewater from homes, businesses, and industry located within the City of Ukiah to the wastewater treatment plant.

The majority of our wastewater runs by gravity through a series of wastewater pipes to the Plant. The remainder of the wastewater, due to elevations that will not allow for gravity flow, must be lifted (pumped) to a location through force (pressurized) mains in the wastewater system that will allow the wastewater to return to a gravity wastewater main.

The Waste Water Treatment Plant underwent a three year, $56.5M improvement project that was completed in 2009. The plant also received numerous multi-million-dollar upgrades as part of the Recycled Water Project.

Maintenance and Operations

The City employs staff of highly-trained wastewater operators, mechanics, and lab technicians to ensure that our plant meets or exceeds all environmental mandates and delivers effective wastewater services with a minimum or no interruption to our customers. The recycled water and wastewater system operators are responsible for nearly 8 miles of recycled water, 93 miles of sewer pipe, and 3 wastewater lift stations. Maintenance includes testing, cleaning, leak repair, operational emergency response, general construction, and more.

The Waste Water Treatment Plant, operational since 1958, serves the City of Ukiah and the Ukiah Valley Sanitation District.  It has a current treatment capacity of 2.8 million gallons per day (MGD) of dry weather flow and 20 MGD of peak wet weather flow.  Primary treatment removes floating material, oils and greases, sand and silt and organic solids heavy enough to settle in water. Secondary treatment biologically removes most of the suspended and dissolved organic material.

Treatment steps are grit removal, primary sedimentation, secondary treatment (trickling filters), secondary sedimentation, final clarification (advanced waste water treatment facility), sludge digestion (digesters), disinfection, dechlorination, and effluent discharge to the percolation ponds.


The Waste Water Treatment Plant underwent a three year, $56.5M improvement project that was completed in 2009. This plant will insure continued compliance with permit requirements and meet future demand growth.

Recycled Water

Recycled Water The City of Ukiah in California produces approximately 1,000-acre feet of recycled water annually.  The City’s recycled water...

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