"This file contains data about estuarine and Great Lakes results for sites that were sampled for the National Coastal Condition Assessment in 2020 and 2021."	

Data have been thoroughly reviewed, however they are not considered final until the NCCA Report is published. Data may be updated at any time. The changelog for the associated file may be found below the column name definitions.              


End-users are responsible for reviewing the suitability of these data for their purposes.     

"""For information about NCCA protocols, please check the NCCA 2020 Field Operations Manual, Site Evaluation Guidelines; Lab Operations Manual, and Quality Assurance Project Plan on the NCCA Website: https://www.epa.gov/national-aquatic-resource-surveys/manuals-used-national-aquatic-resource-surveys#National%20Coastal%20Condition%20Assessment""   "		

"""Please bring any questions about the data to the attention of Hugh Sullivan, NCCA Lead at sullivan.hugh@epa.gov. ""                                             

COLUMN HEADING		DESCRIPTION
PUBLICATION_DATE		Date the dataset was published to the NARS site
LAB		Laboratory
SAMPLE_TYPE		Code identifying sample type
TEST_TYPE		Test Type (Marine/Freshwater)
BATCH_ID		Laboratory batch number
ORGANISM		Name of organism used in toxicity testing. Freshwater sample test organism is Hyalella azteca. Estuarine sample test organism is Leptocheirus plumulosus.
REP		Sequential replicate number
SAMPLE_ID		Number identifying the sample
CBF_BATCH		CBF Batch
CHAMBER_ID		Chamber ID for control sample replicate
NUM_SURVIVAL		Number of surviving organisms
PROP_SURVIVAL		Proportion of organisms surviving
		
Changelog		
		
Publication Date 
Of Most recent
File Posted to
NARS Data Page 
        		Change
09/04/2024		Initial publication