How to Turn Off Your Water Meter 

Both are available at local hardware stores.

At any lowes or home depot. I got mine for $3 it was on sale, but normally go from $13 to $25

Any local hardware store will offer both

Because there's typically no place to put it inside. Your water service line comes into your home underground, and from there is distributed to the fixtures in your home underneath the concrete slab. This is largely done for cost reasons, and to conserve expensive materials. As such, there is no single location inside your home where you can shut off water to the entire home. This has changed to some degree in recent years, where the home has a "breaker panel" with a master valve & individual values which allow shutoff to each room individually, and the whole home as well. Those types of panels are typically in the garage, so line breaks or leaks between the meter and panel could not be disabled at the panel.

hush

The meter, technology and valve belong to the City, and if you break anything they can charge you for repair or replacement. The meter + technology + valve is worth about $500 today, not including labor.