Water Quality
Water Quality > Tributary and Waterfront Data > Mohawk River > Green Island- Silhouette Boathouse

Green Island- Silhouette Boathouse

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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
10/15/2023 613 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/17/2023 1046 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/20/2023 >2420 Beach Advisory 0.0 0.0 1.8 0.0 1.8
07/06/2023 727 Beach Advisory 0.0 0.0 0.0 0.5 0.5
06/07/2023 1203 Beach Advisory 0.0 0.0 0.2 0.0 0.2
05/22/2023 435 Beach Advisory 0.0 0.0 0.3 0.0 0.3
10/16/2022 211 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/21/2022 >2420 Beach Advisory 0.0 0.0 0.0 0.1 0.1
07/10/2022 980 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/11/2022 75 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/24/2022 178 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/24/2021 167 Beach Advisory 0.0 0.0 0.2 0.0 0.2
09/26/2021 >2420 Beach Advisory 0.0 0.0 1.2 0.6 1.7
08/29/2021 1607 Beach Advisory 0.0 0.2 0.0 0.0 0.2
07/26/2021 1203 Beach Advisory 0.0 0.4 0.0 0.0 0.4
06/21/2021 361 Beach Advisory 0.0 0.0 0.1 0.0 0.1
05/24/2021 51 Acceptable 0.0 0.0 0.0 0.0 0.0
10/25/2020 184 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/20/2020 82 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/16/2020 921 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/17/2020 >2420 Beach Advisory 0.6 0.4 0.0 0.8 1.7
06/23/2020 >2420 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/01/2020 727 Beach Advisory 0.0 0.0 0.2 0.0 0.2
10/13/2019 121 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/15/2019 687 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/11/2019 491 Beach Advisory 0.0 0.0 0.0 0.8 0.8
05/14/2019 1046 Beach Advisory 0.1 0.7 0.4 0.0 1.2
10/15/2018 1300 Beach Advisory 0.0 0.0 0.2 0.0 0.2
09/17/2018 1120 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/18/2018 33 Acceptable 0.0 0.0 0.0 0.2 0.2
10/23/2017 84 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/17/2017 178 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/21/2017 2420 Beach Advisory 0.0 0.0 0.0 0.9 0.9
07/17/2017 1986 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/17/2017 1986 Beach Advisory 0.0 0.6 0.0 0.0 0.6
05/22/2017 112 Beach Advisory 0.2 0.0 0.0 0.0 0.2
10/22/2016 168 Beach Advisory 0.3 0.1 0.4 0.0 0.8
09/19/2016 >2420 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/20/2016 980 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/02/2016 >2420 Beach Advisory 1.3 0.1 1.3 0.0 2.7
07/18/2016 166 Beach Advisory 0.0 0.6 0.0 0.0 0.6
07/05/2016 1203 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/19/2016 <1 Acceptable 0.0 0.0 0.0 0.0 0.0
05/25/2016 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 in the lower branch of the Mohawk Delta. It is a private boathouse with floating docks used by rowing clubs.

Agencies Responsible:

Albany County Dept. of Health: 518-447-4580; NYSDEC Region 4: 518-357-2068

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