Northwest Central Dispatch System (NWCDS) is an intergovernmental consolidated emergency dispatch system, providing 9-1-1 services for several communities in northwest suburban Chicago. The combined population of the communities is approximately 500,000+ covering over 170 square miles. Communities include: Arlington Heights, Barrington, Buffalo Grove, Elk Grove Village, Hoffman Estates, Inverness, Mount Prospect, Palatine, Prospect Heights, Rolling Meadows, Schaumburg, and Streamwood. IF YOU NEED POLICE, FIRE, OR EMS, DIAL 9-1-1 IMMEDIATELY.