NOTICE: Beginning in January 2020, USGS WaterWatch will be operated in a maintenance-only mode. We apologize for any inconvenience that this may cause. Please contact USGS WaterWatch if you have any questions
Computed runoff in hydrologic units
(Warning: Runoff values estimated prior to 1930 are subject to
significant uncertainty due to sparseness of the streamgaging network.)
Time Period: Map: State:
Explanation -- Percentile Range
Lowest <10 10-24 25-75 76-90 >90 Highest No data