Rivers and Streams Field Methods

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EPA and its partners visit over 2000 sites to assess U.S. river and stream quality for each survey. Field crews begin each site visit by marking out the stretch of river or stream to be sampled (the sample reach). They then collect data on a variety of indicators at specified points along the reach. To learn how crews sample when they can wade along the sample reach, click on any of the three methods they use, below.*