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

Germantown- Lasher Memorial Park floating docks

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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

44 Samples taken

Sample Date [i] Enterococcus Count
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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.

Quality Rain, day of (in) Prior Day 2 Days Prior 3 Days Prior Rain 4 Days Total Rain
Sort Sort Sort Sort Sort Sort Sort Sort
10/14/2023 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/09/2023 2 Acceptable 0.0 0.1 0.6 0.0 0.7
08/12/2023 5 Acceptable 0.0 0.0 0.0 0.0 0.0
07/08/2023 44 Acceptable 0.0 0.1 0.0 0.0 0.1
06/10/2023 5 Acceptable 0.0 0.0 0.0 0.0 0.0
10/15/2022 50 Acceptable 0.0 0.3 0.8 0.0 1.1
09/10/2022 20 Acceptable 0.0 0.0 0.0 0.0 0.0
08/13/2022 32 Acceptable 0.0 0.0 0.0 0.0 0.0
07/09/2022 2 Acceptable 0.0 0.0 0.0 0.0 0.0
06/11/2022 5 Acceptable 0.0 0.0 1.2 0.3 1.5
10/09/2021 89 Beach Advisory 0.0 0.0 0.0 0.0 0.1
09/11/2021 23 Acceptable 0.0 0.0 0.3 1.1 1.4
08/14/2021 7 Acceptable 0.1 0.0 0.1 0.0 0.2
07/10/2021 575 Beach Advisory 0.0 2.7 2.6 0.7 6.0
06/12/2021 19 Acceptable 0.1 0.0 0.0 0.1 0.2
05/15/2021 1 Acceptable 0.0 0.0 0.0 0.0 0.0
10/10/2020 3 Acceptable 0.0 0.0 0.0 0.0 0.0
09/12/2020 2 Acceptable 0.0 0.0 0.9 0.0 0.9
08/15/2020 3 Acceptable 0.0 0.0 0.0 0.0 0.0
07/11/2020 1553 Beach Advisory 0.1 0.1 0.0 0.0 0.2
10/12/2019 6 Acceptable 0.0 0.0 0.0 0.0 0.0
09/14/2019 1 Acceptable 0.0 0.0 0.4 0.0 0.4
08/10/2019 3 Acceptable 0.0 0.0 0.1 0.1 0.3
07/13/2019 5 Acceptable 0.0 0.0 0.0 0.0 0.0
06/15/2019 <1 Acceptable 0.0 0.0 0.1 0.0 0.1
05/11/2019 1 Acceptable 0.0 0.4 0.0 0.0 0.4
10/13/2018 16 Acceptable 0.1 0.0 0.9 0.0 1.0
09/15/2018 9 Acceptable 0.0 0.0 0.1 2.0 2.1
08/11/2018 4 Acceptable 0.3 0.0 0.0 0.7 0.9
07/14/2018 32 Acceptable 0.0 0.0 0.0 0.0 0.0
06/09/2018 4 Acceptable 0.0 0.0 0.0 0.0 0.0
05/12/2018 <1 Acceptable 0.1 0.0 0.0 0.0 0.1
10/14/2017 1 Acceptable 0.0 0.0 0.1 0.0 0.2
09/09/2017 9 Acceptable 0.0 0.0 0.0 0.5 0.5
08/12/2017 19 Acceptable 0.3 0.3 0.0 0.0 0.7
07/08/2017 >2420 Beach Advisory 0.0 0.1 0.0 0.0 0.1
06/10/2017 14 Acceptable 0.0 0.0 0.0 0.0 0.0
05/13/2017 15 Acceptable 0.0 0.0 0.0 0.0 0.0
10/15/2016 13 Acceptable 0.0 0.0 0.0 0.0 0.0
09/17/2016 3 Acceptable 0.0 0.0 0.0 0.0 0.0
08/20/2016 27 Acceptable 0.0 0.0 0.0 0.0 0.0
07/16/2016 1 Acceptable 0.0 0.0 0.1 0.0 0.1
06/18/2016 15 Acceptable 0.0 0.0 0.0 0.0 0.0
05/21/2016 5 Acceptable 0.0 0.0 0.0 0.0 0.0

Entero Count (fecal indicator) and Rainfall Correlation

44 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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