County spokeswoman Anita Yoder says nearby residents should also make sure their pets don’t go near the creek.
"Obviously, it could make them sick the same way it could make you sick. But the other issue is your children might touch the dogs after they had been there so it’s really important that if your animals go into the creek that you take the time to clean them up and better still keep them out in the first place."
Last Saturday, a contractor pierced a sewer main. The accident caused 100,000 gallons of raw sewage to flow into the creek near the Cook-Riolo bridge, west of Roseville. Crews pumped the sewage into trucks. Authorities say the spill did not contaminate the ground water.