How thirsty will Templeton be?

Templeton’s water resources will be reviewed tonight at a workshop, and one key topic for discussion is whether the community of 7,500 people needs its own drinking water treatment plant.

Future allocations will also be discussed, including a 1,500-customer waiting list dating back to 1989 for new single-family-unit hookups.

With the Nacimiento Water Project now online, the community services district hopes to initially sell 50 to 75 water units. But officials want to look toward future sustainability.

“It’s more about how we can’t look at any one source,” district General Manager Jeff Hodge said. “It’s about what is sustainable over the next 100 years for us.”

Under state law, the unincorporated community is required to maintain the ability to deliver almost 3 million gallons of water per day even if its largest well fails, Hodge said. That figure was set by Templeton’s peak distribution day in 2007.

The community currently meets that standard with three wells tapped into the Salinas River underflow, six major groundwater wells and its 250 acre-feet from Nacimiento.

Nacimiento water is now being delivered to Templeton, but it will take 16 months for the water to fully percolate into the river’s aquifer and become available through the wells.

If the district builds its own treatment plant, lake water becomes immediately available because it isn’t restricted to the time it takes to percolate underground.

A treatment plant would also address state requirements on water salts.

The plant could typically treat about 400,000 gallons of water per day but would have a maximum capacity of 1 million gallons per day.

Costs associated with the facility haven’t been established.

The workshop is set for 5 p.m. today at the district boardroom next to the Fire Department at 206 Fifth St.