Water Quality
Water Quality > Tributary and Waterfront Data > Rondout Creek > Tillson- NY Thruway Crossing

Tillson- NY Thruway Crossing

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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

46 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
10/05/2019 411 Beach Advisory 0.0 0.0 0.6 0.1 0.7
09/14/2019 727 Beach Advisory 0.0 0.2 0.0 0.0 0.3
07/13/2019 1203 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/15/2019 109 Beach Advisory 0.0 0.0 0.3 0.0 0.3
05/11/2019 71 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/13/2018 2420 Beach Advisory 0.1 0.0 1.0 0.0 1.2
09/08/2018 249 Beach Advisory 0.0 0.0 0.1 0.0 0.1
08/11/2018 866 Beach Advisory 0.0 0.0 0.0 0.9 1.0
07/14/2018 1046 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/09/2018 250 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/12/2018 79 Beach Advisory 0.1 0.0 0.0 0.0 0.1
10/14/2017 21 Acceptable 0.0 0.0 0.0 0.0 0.0
09/09/2017 178 Beach Advisory 0.0 0.0 0.1 0.5 0.6
08/12/2017 2420 Beach Advisory 0.5 1.0 0.0 0.0 1.5
07/08/2017 866 Beach Advisory 0.0 0.2 0.0 0.0 0.2
06/10/2017 115 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/13/2017 27 Acceptable 0.1 0.0 0.0 0.0 0.1
10/15/2016 13 Acceptable 0.0 0.0 0.0 0.0 0.0
09/17/2016 22 Acceptable 0.0 0.0 0.0 0.0 0.0
08/20/2016 41 Acceptable 0.0 0.0 0.2 0.0 0.2
07/16/2016 727 Beach Advisory 0.0 0.0 0.5 0.0 0.5
06/18/2016 228 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/21/2016 18 Acceptable 0.0 0.0 0.0 0.0 0.0
10/31/2015 101 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/26/2015 60 Acceptable 0.0 0.0 0.0 0.0 0.0
08/29/2015 49 Acceptable 0.0 0.0 0.0 0.0 0.0
07/25/2015 214 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/27/2015 112 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/30/2015 68 Beach Advisory 0.0 0.0 0.0 0.3 0.3
11/01/2014 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/27/2014 281 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/30/2014 54 Acceptable 0.0 0.0 0.0 0.0 0.0
07/26/2014 31 Acceptable 0.0 0.0 0.0 0.0 0.0
06/28/2014 57 Acceptable 0.0 0.0 0.0 0.0 0.0
05/31/2014 71 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/26/2013 26 Acceptable 0.0 0.0 0.0 0.0 0.0
09/28/2013 45 Acceptable 0.0 0.0 0.0 0.0 0.0
08/24/2013 89 Beach Advisory 0.0 0.1 0.0 0.0 0.1
07/27/2013 250 Beach Advisory 0.0 0.0 0.0 0.0 0.0
06/08/2013 2420 Beach Advisory 0.3 2.0 0.1 0.0 2.5
10/27/2012 770 Beach Advisory 0.0 0.0 0.0 0.0 0.0
09/29/2012 3448 Beach Advisory 0.0 1.7 0.0 0.1 1.8
09/01/2012 130 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/28/2012 687 Beach Advisory 0.0 0.0 0.6 0.0 0.7
06/30/2012 78 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/26/2012 31 Acceptable 0.0 0.0 0.0 0.0 0.1

Entero Count (fecal indicator) and Rainfall Correlation

46 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:

This site is located about a half-mile upstream of the Rondout’s confluence with its largest tributary, the Wallkill River. There is a wastewater treatment plant located about one mile upstream of this site.

Agencies Responsible:

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

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