Data may be potentially impacted by North Branch Chicago River channel construction activities downstream at Albany Road.
| Most Recent Instantaneous Value May 31 | Min (2021) | 25th percen- tile | Median | Mean | 75th percen- tile | Max (2019) |
|---|---|---|---|---|---|---|
| 20.6 | 25.9 | 30 | 80 | 133 | 211 | 448 |