Photos of Sampling for the National Aquatic Resource Surveys
![This cypress tupelo swamp was one of the sites sampled for the National Wetlands Condition Assessment.](/sites/default/files/styles/large/public/2014-08/nwca11-r013-aa-p-180_07.21.jpg?itok=m3lSV6aN)
![Evaluating soil types with the help of a Munsell soil color chart provides important information about the function of wetlands.](/sites/default/files/styles/large/public/2014-08/ne_nwca_july_2011_lancaster_co_describing_soil_color_-_lagrange_ted.jpg?itok=7U0xTB6x)
![Ankle deep in water and mud, wetlands researchers catalog and evaluate plant types.](/sites/default/files/styles/large/public/2014-08/nwca11-1190_misc2_09.11.jpg?itok=scWFwaU_)
![Field crew members carefully lower a multi-probe instrument to take measurements of coastal water quality.](/sites/default/files/styles/large/public/2014-08/boldvacoastsurvey_031.jpg?itok=evodxDGB)
![Sampling for tiny aquatic insects provides information on the biological condition of rivers and streams.](/sites/default/files/styles/large/public/2014-08/bioassessment_087.jpg?itok=VdwfKtG8)
![A field crew uses backpack electrofishing gear to stun fish for sorting and evaluation in a small stream.](/sites/default/files/styles/large/public/2014-08/bioassessment_075.jpg?itok=4ofudh8f)
![Coastal water samples are filtered and preserved in the laboratory.](/sites/default/files/styles/large/public/2014-08/boldvacoastsurvey_054.jpg?itok=BNwzubD3)
![Lake researchers lower a net into the water to collect samples of zooplankton, tiny microscopic animals that drift in water. Zooplankton are biological indicators of lake water quality.](/sites/default/files/styles/large/public/2014-08/bioassessment_012.jpg?itok=9VWhVwhB)
![Sediments dredged using a Ponar grab sampler will be evaluated for the presence of crustaceans, mollusks, worms and other creatures that live on the ocean floor.](/sites/default/files/styles/large/public/2014-08/_dsc6621sediment1.jpg?itok=upO4xXvY)
![Fish collected in rivers and streams are sorted and evaluated to asses the health of the fish community, and then released.](/sites/default/files/styles/large/public/2014-08/cimg5393.jpg?itok=q4mhWoQx)
![Surrounded by samples, forms and equipment, a researcher pauses to record data.](/sites/default/files/styles/large/public/2014-08/056_-_olnas_andy.jpg?itok=Hqw0sDB4)
![Field crew members use an integrated sampler to draw water for filtration and analysis.](/sites/default/files/styles/large/public/2014-08/dscn4451.jpg?itok=7h_By9a5)
![A field day starts early and ends late. Sampling equipment must be carefully cleaned and packed away at the end of each day.](/system/files/styles/large/private/images/2021-07/img_0104_k_krock.jpg?itok=91e5mPzE)
![National Aquatic Resource Survey field crews sample a thousand sites per year to tell the story of water quality in the United States.](/sites/default/files/styles/large/public/2014-08/cimg5941.jpg?itok=XB_GEkmK)
![Crew members wade through stream on their way to sample for the NRSA 2018-19 survey](/system/files/styles/large/private/images/2023-01/ER4_AL_0.jpg?itok=UNo9qrUN)
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