Water Quality > Tributary and Waterfront Data > Roeliff Jansen Kill > Germantown- Lasher Memorial Park floating docks

Germantown- Lasher Memorial Park floating docks

Physical/Chemical Data

Physical, chemical and biological properties of the surface water that are measured continuously while the patrol boat is underway.

Entero Count (fecal indicator) and Rainfall

11 Samples taken

Sample Date [i] Enterococcus Count

Entero Count

Enterococcus (“Entero”) is a fecal indicating bacterium that lives in the intestines of humans and other warm-blooded animals. It is the EPA preferred indicator for sewage contamination.

QualityRain, day of (in)Prior Day2 Days Prior3 Days Prior Rain4 Days Total Rain
SortSortSortSortSortSortSortSort
09/09/20179Acceptable0.00.00.00.50.5
08/12/201719Acceptable0.30.30.00.00.7
07/08/2017>2420Beach Advisory0.00.10.00.00.1
06/10/201714Acceptable0.00.00.00.00.0
05/13/201715Acceptable0.00.00.00.00.0
10/15/201613Acceptable0.00.00.00.00.0
09/17/20163Acceptable0.00.00.00.00.0
08/20/201627Acceptable0.00.00.00.00.0
07/16/20161Acceptable0.00.00.10.00.1
06/18/201615Acceptable0.00.00.00.00.0
05/21/20165Acceptable0.00.00.00.00.0

Entero Count (fecal indicator) and Rainfall Correlation

11 Samples taken

Water Quality*

Acceptable (0–60) Beach Advisory (61+)

*Single sample thresholds;
Enterococcus count per 100mL

Prior Four Day Rainfall
(in inches)

Dry Weather (0–0.25) Wet Weather (0.25+)

Enterococcus is an EPA-approved fecal contamination indicator.

Samples taken by citizen scientists and processed at laboratories that aren't directly affiliated with Riverkeeper, using methods and study designs that are consistent with Riverkeeper's Hudson River and Citizen Testing programs.

Rainfall data comes from wunderground.com. Wet weather is a common trigger of fecal contamination.

What do the Numbers Mean?

Water Quality scoring is based on the 2012 Recreational Water Quality Criteria from the US Environmental Protection Agency (EPA) for safe swimming. Learn More

About this location:

This site is at Lasher Park in Germantown, on the shoreline of the Hudson. The sample should be collected at the northern floating dock. Samples from this site, just two miles south of the Roe Jan's mouth, help us learn how far into the Hudson the Roe Jan's influence extends, and under what conditions. These samples are collected by Roe Jan watershed residents and processed by the Bard Water Lab. Site photo credit: Kaare Christian.

Agencies Responsible:

Columbia County Dept. of Health: (518) 828-3358; NYSDEC Region 3: 845-256-3000

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