to
Update
is a borough in Allegheny County, Pennsylvania, United States. The population was 9,666 at the 2000 census.
According to the United States Census Bureau, the borough has a total area of 16.6 square miles (43.0 km²), of which, 16.6 square miles (42.9 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.24%) is water.