# Safety Zone; Lake Michigan, Chicago, IL

**Action Urgency Score:** 30/100

| Field | Value |
|---|---|
| Agency | Homeland Security Department; Coast Guard |
| Type | Final rule |
| Action | Temporary final rule. |
| Published | 2026-08-11 |
| Effective | 2026-08-23 |
| Significant | No |
| CFR parts | 33 CFR 165 |
| Summary | The Coast Guard is establishing a temporary safety zone for navigable waters within a small area of Monroe Harbor in Lake Michigan in Chicago, IL. This action is necessary to protect personnel, vessels, and the marine environment from potential hazards created by the Chicago Triathlon swim event. Entry of vessels or persons into this zone is prohibited unless specifically authorized by the Captain of the Port, Sector Lake Michigan or their designated representative. |
| Document number | 2026-16341 |

## Why this score
- Final rule.

Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/08/11/2026-16341/safety-zone-lake-michigan-chicago-il). Last refreshed: 2026-11-04T09:17:43.641Z.
Data from the Federal Register API; the published Federal Register document is authoritative. Informational only, not legal advice.