Peak unemployment rates
Allegheny County - January 1983 - 14.7%
Beaver County - January 1983 - 28%
Butler County - January 1983 - 20.2%
Fayette County - February 1983 - 26.7%
Greene County - February 1983 - 22.1%
Lawrence County - January 1983 - 23.3%
Washington County - January 1983 - 20.4%
Westmoreland County - January 1983 - 20.6%
For the regional unemployment rate over time, my interactive version appears to be still working, though I have not updated the most recent data in a couple years.
addendum: yes... 28.0% was the peak unemployment rate recorded in Beaver County. If you want to put these numbers in context, compare them to the potentially overestimated unemployment rates during the Great Depression... not the recent and 'Great Recession,' but the Great Depression of the 1930s.Also, I really am going to have to go back and calculate what U-6 was in the Pittsburgh region was in 1983. Going to be a scary number.