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City Departments

Upcoming Events
Nov
22
Thu
all-day Thanksgiving Day @ City of Ukiah Civic Center
Thanksgiving Day @ City of Ukiah Civic Center
Nov 22 – Nov 23 all-day
Thanksgiving Day @ City of Ukiah Civic Center | Ukiah | California | United States
The City of Ukiah Civic Center will be closed to observe the Thanksgiving Holiday.
Dec
24
Mon
all-day Winter Holiday @ City of Ukiah Civic Center
Winter Holiday @ City of Ukiah Civic Center
Dec 24 – Dec 25 all-day
Winter Holiday @ City of Ukiah Civic Center | Ukiah | California | United States
The City of Ukiah Civic Center will be closed to observe the Winter holiday.
Dec
31
Mon
all-day New Year’s Holiday @ City of Ukiah Civic Center
New Year’s Holiday @ City of Ukiah Civic Center
Dec 31 2018 – Jan 1 2019 all-day
New Year's Holiday @ City of Ukiah Civic Center | Ukiah | California | United States
The City of Ukiah Civic Center will be closed to observe New Year’s Holiday.
City of Ukiah Civic Center

Waste Water Treatment Plant Operations

Waste Water Treatment PlantThe 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.

IMG_0023Treatment 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.
Waste Water Treatment Plant

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