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Note: The information presented in the above maps is unconfirmed CSO
and diversion activity. The District confirms CSOs usually in 24 hours. Please visit
this link for a list of confirmed CSOs.
Not all CSO outfalls are equipped with monitoring equipment. Therefore, other CSOs may
have occurred that are not reflected on the above map. Regardless of CSO
activity, the Chicago Area Waterways may contain disease-causing bacteria
at any time. Therefore, swimming, canoeing, or other activities
where immersion in water is possible should be avoided and is not
recommended, particularly during and immediately following
rainfall.
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