Mostly clear

One year from opening, Petaluma?s $110 million facility that will create a new water source for irrigation nears the end of heavy construction

A year from now, Petaluma?s sewage will begin a transformative journey ? through a new treatment plant and back into town as a new water source for summertime irrigation of parks, playing fields and landscaping.

After almost three years, the facility needed to make that possible is 90 percent finished, with the bulk of heavy construction over and start-up operations on the horizon.

Workers are being hired for the Ellis Creek Water Recycling Facility ? the Lakeville Highway plant?s official name ? and this fall the city will connect the existing sewer system to the site.

Once operational, the plant will begin pumping out recycled water that can be used to irrigate crops, lawns and parks, saving drinking water.

?The exciting part of this facility is that it is providing a new water supply for the city,? said Margaret Orr, the city?s project manager for the new plant. ?Tertiary water is the only form of new water in California.?

Petaluma?s plant will clean sewage to the highest level called for in state health codes ? tertiary water ? allowed to be used for all kinds of activities, except human consumption.

Like Santa Rosa?s sub-regional sewer treatment plant and hundreds of others throughout the state, Petaluma?s plant will make wastewater clean enough for different uses. In addition to being used at city parks, Petaluma?s recycled water will be sold to farmers, golf courses and business parks, and released into the Petaluma River during the winter months.

Even the treatment plant itself will tap into the recycled water produced there for firefighting, irrigation and other non-drinking uses.

Once online, the plant will produce 464 million gallons of recycled water a year ? enough to offset the water use of 1,400 single-family homes and expand the current distribution of recycled water beyond Rooster Run Golf Course and some south Sonoma County farms.

And although the plant was designed to accommodate Petaluma?s growth through 2025 ? the horizon year of the new General Plan ? officials see it as a long-term staple of the sewer system.

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