Wetland assessment sites, the whole record

Every wetland site-year in the TerraPulse dex over the whole record: a count by year, a map and the 50 largest, measured, with the source and licence of every number.

2,849 wetland site-years over the whole record.

The largest by total phosphorus
whennametotal phosphorus
202131400.0
202119800.0
201618500.0
201617500.0
202112000.0
201111510.0
202111200.0
202110000.0
20167550.0
20117364.0

Measured by epa_nars_nwca. US federal work - public domain by statute (17 U.S.C. 105). Lake of 2026-11-07.