Stale — older than 1 week USGS

Detroit R At Sw Water Intake Nr Grassy Island, MI

Updated November 19, 2025 at 08:30:00 PM · Provisional · Site 421337083074201

Current conditions

Historical trends

Hourly measurements

Detailed readings by hour, organized by day

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Official USGS page: https://waterdata.usgs.gov/monitoring-location/USGS-421337083074201/ (may include cooperator information)