// Risk Intelligence
| Risk Score | 7 / 10 High |
| Facility Type | 💧 Water Treatment Facility |
| Operator / Branch | City of Chicago / DWM |
| Host County | Cook County IL |
| Nearest City | Washington DC |
| Primary Risk Radius | 50 miles |
// Strategic Significance
Chicago operates the largest municipal water treatment system in the world drawing from Lake Michigan through two massive crib intakes miles offshore. The system serves 5.5 million people in Chicago and 76 suburbs through two treatment plants — Jardine and South. Lake Michigan contamination from any nuclear power plant chemical spill or infrastructure failure would threaten the drinking water supply for one of America's largest cities.
// Civilian Impact Assessment
The Chicago metro area's 5.5 million water customers depend on Lake Michigan water filtered through aging infrastructure. Lead pipe replacements are ongoing in older neighborhoods. A cyberattack disrupting water treatment could affect millions within hours. Lake Michigan's connected Great Lakes system means contamination upstream would affect Chicago's intake water quality.
// Evacuation & Shelter Guidance
Chicago area residents should maintain emergency water storage given the city's dependence on a single lake-based system. Monitor Chicago Department of Water Management emergency broadcasts. Follow any boil water advisories immediately. Maintain water filtration capability for short-term emergencies. Know your neighborhood's water main infrastructure status.
// Recommended Preparedness Gear
Essential preparedness items for residents within the 50-mile risk zone of Chicago Water Treatment System IL.
72-Hour Emergency Food Kit View on Amazon → Water Filtration System View on Amazon → Portable Generator View on Amazon →* ThreatMap USA participates in the Amazon Associates Program.