May 28, 2009 8:18 pm Mumm Napa Winery 24/7 Chicago explores Mumm Napa. Nestled in beautiful Napa Valley is Mumm Napa, one of California’s top sparkling wine producers and one of the most popular destinations for wine country visitors. Local 2:17 Reward increases to $100K for arrest in Chicago Police Officer Luis Huesca's killing 2:00 Thornton Township residents seek answers over use of taxpayer dollars 1:42 Warrant issued for suspect in murder of Chicago police officer 2:15 Politicians, season ticketholders skeptical on Bears' plans for new stadium 2:09 Former Foxtrot, Dom's employees protest after abrupt closures