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USGS Water-Quality Information

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The Hydrologic Benchmark Network

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USGS Circular 1173 Water Quality Data

The Hydrologic Benchmark Network (HBN) consists of 37 watersheds that provide long-term measurements of streamflow and water quality in areas that are minimally affected by human activities. In 2011 measurements of aquatic biology and soil chemistry were added to the network. All of these data are used to study long-term trends in surface water flow, water chemistry, aquatic biology, and soil chemistry and as a benchmark against which to compare changes in flow and chemistry in developed watersheds.

Welcome to HBN

Recent Publications:

Soil Monitoring Fact Sheet

HBN Soil Monitoring Fact Sheet

HBN National Trends Paper

HBN National Trends Paper

FirstGov, 'Your First Click to the U. S. Government'