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Daily Streamflow Conditions

Click map to view current
streamflow conditions.

Real-time streamflow data for Ohio


[color code for] High
[color code for] > 90th percentile
[color code for] 75th - 89th percentile
[color code for] 25th - 74th percentile
[color code for] 10th - 24th percentile
[color code for] < 10th percentile
[color code for] Low
[color code for] Not ranked

The colored dots on this map depict streamflow conditions as a percentile, which is computed from the period of record for the current day of the year. Only stations with at least 30 years of record are used.  The gray circles indicate other stations that were not ranked in percentiles either because they have fewer than 30 years of record or because they report parameters other than streamflow. Some stations, for example, measure stage only.


NWISWeb -- obtain real-time and historic streamflow, groundwater, and water-quality data.

Cooperative Water Program

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Additional Sources of Water Information


National Water-Quality Assessment Program: Lake Erie-Lake St. Clair Basins
The Lake Erie-Lake St. Clair Basins in Indiana, Michigan, New York, Ohio and Pennsylvania is one of more than 50 study units that are part of the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program. The long-term goals of this program are to describe the status and trends in the quality of a large, representative part of the Nation's surface- and ground-water resources, and to provide a sound, scientific understanding of the primary factors affecting the quality of these resources.

LERI Study Unit

Circular 1203 Water Quality in the Lake Erie-Lake Saint Clair Drainages Michigan, Ohio, Indiana, New York and Pennsylvania, 1996-98 or view whole report *pdf (7.55 mb) ||  News release describing Circular 1203  or view in *pdf ( 31 kb)  

WRIR 00-4255  Comparison of U.S. Geological Survey and Ohio Environmental Protection Agency Fish-Collection Methods Using the Index of Biotic Integrity and Modified Index of Well-Being, 1996-97 [Abstract] or view whole report *pdf (676 mb) 

WRIR 00-4200 Areal Distribution and Concentrations of Contaminants of Concern in Surficial Streambed and Lakebed Sediments, Lake Erie-Lake Saint Clair Drainages, 1990-97 [Abstract] || *pdf (8.6 mb)

WRIR 00-4169 Occurrence, Distribution, and Loads of Selected Pesticides in Streams of the Lake Erie-Lake St. Clair Basin, 1996-98 [Abstract] || *pdf (1.9 mb)

WRIR 00-4146  Ground-Water Quality and Vulnerability to Contamination in Selected Agricultural Areas of Southeastern Michigan, Northwestern Ohio, and Northeastern Indiana [Abstract] or view whole report *pdf  (11.3 mb)

WRIR 00-4091  Status and Trends in Suspended-Sediment Discharges, Soil Erosion, and Conservation Tillage in the Maumee River Basin-- Ohio, Michigan, and Indiana [Abstract]  or view whole report *pdf (5.5 mb)

Thomas, Mary Ann, 2000, The Effect of Residential Development on Ground-Water Quality Near Detroit, Michigan: Journal of the American Water Resources Association, v. 36, no. 5, p. 1023-1038

WRIR 97-4256  National Water-Quality Assessment of the Lake Erie-Lake St. Clair Basin, Michigan, Indiana, Ohio, Pennsylvania, and New York-- Environmental and Hydrologic Setting   [Abstract]

LERI Newsletter July, 1996

TMDL Workshop, Fecal Bacteria and Pathogens, Sept. 9-11, 1998, Denver, Colorado,  Slides  


 * Note: Many of these files are in Portable Document Format (pdf) and require the Adobe Acrobat Reader for viewing, getpdf.gif available at no charge from Adobe Systems.





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