Illinois State House District 66 issued the following announcement on July 15
The Illinois Department of Public Health (IDPH) has established a menu of mitigation options organized by risk level to combat the resurgence of COVID-19 in the state.
The following health metrics will be used to determine when the spread of the virus in a region requires additional mitigations:
Sustained increase in 7-day rolling average (7 out of 10 days) in the positivity rate
And one of the following:
Sustained 7-day increase in hospital admissions for a COVID-19 like illness
Reduction in hospital capacity threatening surge capabilities (ICU capacity or medical/surgical beds under 20%)
or
Three consecutive days averaging greater than or equal to 8% positivity rate
Mitigations will be applied on a regional basis based on the Emergency Medical Services (EMS) Regions that have traditionally guided IDPH in its statewide public health work. Expanding to 11 regions allows for a more granular approach in this phase of the response to COVID-19. The new regions follow county lines to account for counties that are in more than one region of the EMS system. The new regions are as follows:
NORTH: Boone, Carroll, DeKalb, Jo Daviess, Lee, Ogle, Stephenson, Whiteside, Winnebago
NORTH-CENTRAL: Bureau, Fulton, Grundy, Henderson, Henry, Kendall, Knox, La Salle, Livingston, Marshall, McDonough, McLean, Mercer, Peoria, Putnam, Rock Island, Stark, Tazewell, Warren, Woodford
WEST-CENTRAL: Adams, Brown, Calhoun, Cass, Christian, Greene, Hancock, Jersey, Logan, Macoupin, Mason, Mason, Menard, Montgomery, Morgan, Pike, Sangamon, Schuyler, Scott
METRO EAST: Bond, Clinton, Madison, Monroe, Randolph, St. Clair, Washington
SOUTHERN: Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin, Jackson, Jefferson, Johnson, Marion, Massac, Perry, Pope, Pulaski, Saline, Union, Wabash, Wayne, White, Williamson
EAST-CENTRAL: Champaign, Clark, Clay, Coles, Crawford, Cumberland, De Witt, Douglas, Edgar, Effingham, Fayette, Ford, Iroquois, Jasper, Lawrence, Macon, Moultrie, Piatt, Richland, Shelby, Vermillion
SOUTH SUBURBAN: Kankakee, Will
WEST SUBURBAN: DuPage, Kane
NORTH SUBURBAN: Lake, McHenry
SUBURBAN COOK: Suburban Cook
CHICAGO: City of Chicago
Once a region meets the resurgence criteria, a tiered menu of mitigation options will be considered. If sustained increases in health metrics continue unabated, further mitigations could be added from additional tiers.
Original source can be found here.