The Roeliff Jansen Kill spans
over 54 miles from its start in Massachusetts to its discharge into the Hudson River estuary at Linlithgo, New York. It is one of the largest tributaries to the Hudson River. The watershed, which is located mostly in New York’s Columbia County, covers 212 square miles. The Bard Water Lab measures sewage-indicating bacteria concentrations and turbidity levels in samples from the Roeliff Jansen Kill. We also record temperature and conductivity data collected by Roe Jan Watershed Community
volunteers while sampling.
Roe Jan Watershed The Roe Jan is one of the largest Hudson River tributaries. The majority of the Roeliff Jansen Kill is designated a Class C stream, meaning that it needs to be able to support fishing and recreation. As the stream moves closer to the Hudson River its classification changes from C to A. Class A waterways need to be viable for drinking water, and at the point where the Roe Jan discharges into the Hudson it is a Class A water body. Since 2016, monitoring for disease-causing Enterococcus bacteria has taken place on the Roe Jan through the Roe Jan Watershed Community. The Entero analysis and data reporting are completed by the Bard Water Lab.