Water Quality > Tributary and Waterfront Data > Esopus Creek > Marbletown- Ashokan Reservoir seepage

Marbletown- Ashokan Reservoir seepage

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

17 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
10/12/201780Beach Advisory0.
08/10/2017291Beach Advisory0.
07/06/2017222Beach Advisory0.
05/11/2017131Beach Advisory0.
07/14/2016649Beach Advisory0.
06/16/2016770Beach Advisory0.

Entero Count (fecal indicator) and Rainfall Correlation

17 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 trained by Riverkeeper, and processed on the Riverkeeper vessel, according to the 2014 Quality Assurance Project Plan.

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:

Water that seeps beneath the Ashokan Dam flows about 3/4 mile before crossing under Route 28A and receiving the Little Beaver Kill. At this location, on Ashokan Center property, we sample seepage water just upstream of this confluence. From here the Esopus Creek flows more rapidly.

Agencies Responsible:

Ulster County Dept. of Health: 845-340-3010; NYSDEC Region 3: 845-256-3000

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