The main shutoff for city water in the majority of the Pacific north west is at the curb. If an older home it will be a concrete box with a metal plate the meter reader lifts to read the usage. Clean off the grass and dirt open the plate some times you will need to lift the top off to get to the shutoff. Lift and wiggle using the meter reader hole and you will find the shutoff valve some times covered with a little dirt. Don't jerk up on the cement cover or it may crack/break. If a newer home the box may be green plastic similar removal process. As others have said your photo is of the gas meter& shutoff. Don't feel like a fool you now know where to shut the gas off if you smell gas in the house. Down south of you they recommend a gas wrench to be strapped to the pipe, a few years back the utility was offering cheap stamped ones for 2$ but a crescent or open end wrench will work, this was for earthquake safety since they are saying the big one off shore is due in the next 100 years and you may not be able to find a wrench (night , building damage or other problem) having the wrench at the shutoff could prevent a fire.