Counties will note that, in many cases, there were updated prevailing wage rates in 2019, which should be updated and posted by each county affected.
All prevailing wage information can be found on the Illinois Department of Labor’s website. https://www2.illinois.gov/idol/Laws-Rules/CONMED/Pages/prevailing-wage-act.aspx.
You will note on the Department of Labor's website, how they post the prevailing wage rates has changed from fixed text on a page to an interactive table.
A brief summary on the 'Changes to the Prevailing Wage Law' impacting units of local government, provided by the Illinois Department of Labor is available here. Public Act 100-1177 (SB203) passed in the Fall Session of the 100th Illinois General Assembly.