EPA Regional Programs


May. 12, 2016
EPA Releases the National Wetland Condition Assessment (NWCA): A Collaborative Survey of the Nation's Wetlands
This newly released report collating data from the 2011 survey finds that less than half of wetland area, 48%, is in good condition based on plant community. Of the stressors the NWCA examined, physical alterations to wetland habitat such as surface compaction, ditches, or plant removal are the most widespread: 27% of wetland area nationally has high stress levels for surface hardening and vegetation removal, and 23% of wetland area has high stress levels for ditching. This is the first national monitoring study of the overall condition of wetlands conducted with a statistically-valid random sample approach.

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Last Updated: July 16, 2014