Steveston, Oregon
From The Stargate Omnipedia
Small American town where the N.I.D. conducted experiments on the entire population by giving each and every member a cloned Goa'uld symbiote. Drawn to leave the planet, they began constructing a ship in which to escape.
The N.I.D. plans were a failure, however, and the Goa'uld very nearly managed to infiltrate the United States government, N.I.D. headquarters, and Stargate Command. Shortly afterward, the symbiotes were removed and a cover story was conceived to prevent the townspeople from learning the truth.
KEY EPISODE
Nightwalkers - Carter, Teal'c and Quinn travel to Steveston, Oregon, in search of a missing scientist with valuable information regarding the town.