Environmental Permits & Regulation uses its extensive permitting authority to ensure compliance with the environmental provisions of the Chicago Municipal Code. All permits issued contain operating conditions that require best environmental practices. In cases where proactive permitting is inadequate to ensure compliance, the Environmental Permits & Regulation also has an extensive enforcement component: inspectors, investigators, and engineers respond to complaints, inspect sites, and where appropriate, initiate enforcement actions. Annually, the Environmental Permits & Regulation field personnel inspect approximately 12,000 sites and issue approximately 1,000 citations. They also file dozens of lawsuits and administrative cases, many in cooperation with local, state and federal partners.