The city of Napa dedicated a drinking water treatment plant that received more than $40 million worth of improvements and expansion over the past three years. With the improvements, the plant can now treat enough water daily to meet the city’s needs into the early months of the summer and, has increased the treatment capabilities from eight million gallons per day to 20 million gallons per day.
Improvements include a new sedimentation basin, two new filters and four refurbished ones, a new chemical containment system, chemical storage tanks and a new data acquisition system that allows the water division to manage the water supply from a central location. The facility now uses ozone to treat its water, this will ensure the plant meets new treatment regulations and those in the pipeline.
Napa obtains water from two local reservoirs: Lake Hennessey and Lake Milliken. With the increased treatment capacity, Napa can now take full advantage of its water entitlement from the state, while saving its reservoir water for the increased demand of summer or for dry years.