CareScout, the primary national source for long-term-care cost data (formerly published by Genworth), surveys and publishes state-level medians only -- it does not break out metro-area or city-specific figures for Milwaukee or any other city.
The detail behind the number
This surprises a lot of families searching specifically for 'Milwaukee assisted living cost' or 'Milwaukee nursing home cost,' since intuitively a big city ought to have its own number the way it has its own zip codes. In reality, any city- or metro-specific figure you find online for Milwaukee was either estimated by the website publishing it or extrapolated from the statewide Wisconsin figure -- not independently surveyed for Milwaukee specifically. The most defensible approach is to use Wisconsin's statewide CareScout median as a rough starting reference point, note explicitly that local pricing likely differs from it, and then get real numbers directly from the specific Milwaukee-area communities or agencies you're actually considering.